SWITCH-RATED

PLUGS & RECEPTACLES

Featuring: DECONTACTOR™ Technology

meltric.com
 SWITCH-RATED SAFETY

COMMON
• Wastewater Treatment
• Power Generation
• Brewing, Distilling, Malting
• Mining and Aggregate
• Automotive
• Plastics
• Construction/Heavy Equipment
• Grain, Sugar, and Feed Processing

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INDUSTRIES
• Steel and Aluminum
• Food and Beverage
• Airport and Aviation
• Ports and Marines
• Railroads
• Shipbuilding
• Data Centers and National Labs

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 MELTRIC Switch-Rated
Plugs & Receptacles
Advantages
Exclusive Switch-Rated Safety
Our Switch-Rated plugs and receptacles combine the safety and functionality
of a disconnect switch with the convenience of a plug and receptacle.
Their exclusive design allows users to safely make and break
connections under full load and provides significant protection
in overload and short-circuit conditions.

Their dead-front design and enclosed arc chambers ensure that

the load is safely disconnected, and that all live parts are isolated
and inaccessible, before the plug can be removed. This design
guarantees that users are protected from exposure to live parts and
potential arc flash at all times while making and breaking connections.

MELTRIC Switch-Rated devices

enable you to easily comply with NEC/CEC
and NFPA 70E/CSA Z462 requirements.

Motor & Branch Circuit Switching

Our Switch-Rated devices are also UL and CSA rated for “motor circuit” and “branch circuit” disconnect switching
and are an approved NEC/CSA “line of sight” disconnect switch. Models are available with ratings up to:

• 200 A for Branch Circuit Disconnect Switching

• 100 hp for Motor Circuit Disconnect Switching

Switch-Rated plugs and

receptacles eliminate
expensive and spacious
non-fused disconnect
switches and interlocks.

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Short-Circuit Overload Protection
Our Switch-Rated plugs and receptacles are designed to provide
short-circuit protection far in excess of what is required by the
standards. They are rated to successfully close into and withstand
short-circuit currents of up to 100 kA when used in circuits protected
by RK1 fuses. (See page 19 for more information on ratings.)

Our Switch-Rated plugs and receptacles provide safe and

convenient plug & play connections and can be used as the “line of
sight” disconnect switch for most inductive and resistive equipment.
They are UL and CSA listed for use as:

a. a motor circuit disconnect switch

b. a branch circuit disconnect switch
c. a plug and receptacle
Our devices eliminate the need for mechanical interlocks and auxiliary non-fused disconnect switches.

Their dead-front design also simplifies compliance with NFPA 70E and CSA Z462. The plug can only be
removed from the receptacle after the load has been disconnected and the safety shutter has closed. This
isolates the receptacle contacts and prevents an operator from ever being exposed to arcing or live parts.
Removing the plug from the receptacle is a NFPA 70E defined normal operation that visually verifies the
power is OFF and eliminates the need to wear cumbersome PPE and perform complex procedures.

Switch-Rated Safety Anywhere a Power Connection is Needed

The modular design and numerous mounting accessories of our Switch-Rated plugs and receptacles make it easy
to configure them for use in a wide variety of applications. They can be used as in-line connectors/switches or
mounted on wall boxes, distribution panels, or even directly on equipment.

Their modular design makes it simple to install them as “line of sight” disconnects exactly where they are
needed. Plus, they eliminate the hassle of finding convenient mounting locations for spacious interlocks and
auxiliary disconnect switches required with other connectors.

They make it easy to provide plug & play connections for all your mission-critical
equipment. The switch-ratings and dead-front design of our devices make it
easy for mechanics to safely break electrical connections, remove failed
motors or other equipment, and quickly install pre-wired replacements.

Built For Thousands of Operations

in the Harshest Environments
Our Switch-Rated devices’ silver-nickel, butt-style contacts and patented,
spring-assisted terminals have been performance tested for over 6,000
trouble-free operations with highly consistent electrical connections.
Their contacts are backed by a best-in-industry, 5-year warranty.

Critical hardware is made of stainless steel to protect against the effects of

corrosion. Reinforced polyester and aluminum alloy casings are used to provide
excellent impact resistance as well as protection against UV radiation and most
harsh chemicals found in typical industrial applications.

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 MELTRIC Switch-Rated Plugs & Receptacles
Very Low Contact Resistance Improves Connection Quality Spring
Flexible Braid

Spring-Loaded Butt Contacts

Provide for Thousands of
Plug/Inlet Receptacle
Consistent & Reliable Connections Contact Contact

Our Switch-Rated plugs and receptacles use spring-loaded, butt-style contacts similar to those used on contactors
and switchgear. Their end-to-end mating provides a stable connection. The spring-loading delivers optimal
contact pressure, and the integrity of the electrical connection is maintained over thousands of operations.

Butt-style contacts have a designated and controlled contact area, permitting the use of higher quality materials.
We use contacts made of 85% silver and 15% nickel. End-to-end mating allows for quick-break (15-millisecond)
technology. And you avoid the problems common with other types of contacts:

• Spring-loaded butt contacts automatically compensate for manufacturing

variations, eliminating contact mating and connection quality problems
caused by the dimensional variations of other contact designs.

• End-to-end mating eliminates the effects of wear inherent with sliding contacts.
Compression of
coil spring ensures a
• Consistent spring pressure eliminates overheating caused by poor contact force. consistent contact force.

The performance and design advantages of spring-loaded butt contacts make them a
superior choice for providing consistently safe and reliable connections.

Limitations of Pin & Sleeve Style Contacts

• Manufacturing variations can cause too tight or too loose of a fit between the pin and the sleeve.
•  ear from normal use reduces contact force, increasing resistance and heat
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build-up, possibly leading to overheating and catastrophic equipment failure.

•  he design requires the use of cheap and easy to machine materials such
T
as brass, which has inferior electrical properties.

Contact Mating Sequence Quick Break

Auxiliaries Ground To ensure proper and safe connections, Pawl
Neutral Phase MELTRIC contacts mate in a specific sequence:
1. The ground closes first
2. Then the neutral
3. Then the phases
4. Then any auxiliary contacts,
if included
The auxiliary contacts “make last and
break first,” making them suitable for
use as “pilot” contacts.
To achieve the desired mating Spring-loaded
sequence, contacts are set into ejection ring
the plug at different heights. On opening, the sequence is reversed.
A spring-loaded ejection system ensures
a quick break (15 ms) of the contacts.
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 CONTACT TECHNOLOGY

Silver-Nickel Contact Material

for Superior Conductivity Silver-Nickel Contact Tip
(85% Ag and 15% Ni)

We use solid silver-nickel contact surfaces on all of our Switch-Rated plugs and receptacles.
The contacts’ 85% silver and 15% nickel composition combines the durability of nickel with
the excellent conducting properties of silver.

 ilver-nickel contacts provide significant advantages over the brass materials used
S
on most other types of plugs and receptacles:

•  ilver-nickel maintains a low contact resistance and superior electrical

S
Contact
properties even after oxidation and tarnishing. Tip

• Silver-nickel withstands arcing very well and only welds at extremely

high pressure and temperature.

•  he hardness of nickel gives the silver-nickel contacts excellent

T
wear resistance.

• Silver-nickel performs well and withstands wet and corrosive environments.

The combination of silver-nickel contacts with a spring-loaded, butt-style design makes

the contacts ideal for repetitive making and breaking of connections under load. Close-up of Silver-Nickel
Contact Tip

Limitations of Brass as a Contact Material

• Brass is not arc resistant, so it is not suitable for repeated making and breaking under load.

• Brass is a soft material and wears rapidly, degrading the operational characteristics of the contact.

• Brass oxidizes easily, preventing it from performing well in wet or corrosive environments.

• The contact resistance of brass increases rapidly due to tarnishing that occurs during normal use.

Operating Mechanism Self-Cleaning Closing Motion

On our Switch-Rated devices, the circuit is safely Our contacts close with a self-cleaning, wiping action.
interrupted by simply depressing the pawl on When the contacts initially mate, they are slightly offset.
the receptacle. Doing so releases the energy in While closing the connection, the plug contacts are rotated
the spring-loaded operating mechanism, which partially across the receptacle contacts, helping to remove
instantaneously breaks the circuit and ejects the deposits from the contact surface.
plug to the OFF position. Contact breaking time is
about 15 milliseconds. The quick break mechanism
is automatically reloaded when the plug is
re-inserted into the receptacle.

In contrast, the disconnection speed of pin and

sleeve and twist type devices depends on the user’s
motion and strength when removing the plug. MELTRIC contacts are self-cleaning.
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 MELTRIC Switch-Rated Plugs & Receptacles
Eliminate Arc Exposure
Enclosed arc chambers, skirted plug casings, and safety shutters on the receptacles together create the
dead-front design of our Switch-Rated devices. With the dead-front design, it is virtually impossible
for users to be exposed to either live parts or arcing.

Safety Shutter Eliminates Exposure Hazards Dashed lines

indicate location
of contacts behind
DS and DSN Series Switch-Rated devices have safety shutters that close closed shutter.

over the receptacle contacts before the plug can be removed. Users have
no exposure to arcing, or access to live parts, at any time during or after
the removal of the plug.

To remove a plug from a receptacle, the plug must be rotated 30°

counterclockwise in the OFF position. This rotation of the plug automatically
closes and locks the safety shutter, creating an insulating barrier between
the plug and receptacle contacts before the plug can be removed.

The safety shutter can only be opened by the insertion and rotation of an
electrically compatible plug. Twenty-four different keying arrangements
MELTRIC receptacle
ensure that only electrically compatible plugs can be inserted into a receptacle. safety shutters block
access to live contacts.

Different keying prevents

mating of electrically incompatible
plugs & receptacles.

Inlet Front View Position 04 Inlet Front View Position 14

480 V 60 Hz 600 V 60 Hz

Other Plugs & Receptacles Allow Access to Live parts

Pin & Sleeve Receptacle Twist-Type Receptacle Twist-type with exposed

contacts while still conducting

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DEAD-FRONT DESIGN

It’s Impossible to Draw an Arc

Drawing an arc during plug removal is an inherent hazard with traditional pin and sleeve and twist-type devices.
By contrast, our Switch-Rated devices isolate the making and breaking of the contacts in an enclosed arc
chamber. The plug contacts are deenergized and isolated from live parts within the enclosed arc chamber
before the plug can be physically removed.

When the receptacle’s OFF button is pushed, its spring-loaded operating mechanism instantly opens the
contacts to break the circuit and ejects the plug to its OFF position. The quick (15 milliseconds) breaking of
the contacts minimizes arcing; any arcing that does occur is safely contained within the arc chamber.

In the OFF position, the plug contacts are dead and separated from live parts by a safe distance. Isolated and
inaccessible to users, all contacts are fully contained within an enclosure formed by the plug’s skirted casing
and the receptacle’s casing.

The rotation of the plug and closing of the safety shutter during plug removal ensures that potential arc paths
are blocked before the plug can be removed. There is no possibility of drawing an arc.

Receptacle Safety shutter

casing

Arc chamber prevents

outside exposure to arc flash

Plug
casing

Drawing an Arc is Possible with Pin & Sleeve Devices

Don’t let this

happen to you!

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 MELTRIC Switch-Rated Plugs & Receptacles
Special Features Increase Functionality

Control, Monitor, Communicate

Most of our Switch-Rated plugs and receptacles are available with optional
auxiliary/pilot contacts that allow users the convenience and flexibility of controlling
auxiliary equipment, monitoring process parameters, and/or communicating
alarms without the need for secondary connectors. The larger Switch-Rated
models are available with up to 6 auxiliary contacts.

Auxiliary/Pilot
Lock Together or Lockout Contacts

All Switch-Rated devices include provisions on the plug that allow users to perform
lockout/tagout by simply inserting a lock through an existing hole on the device.
The user only needs to provide the lock – no additional mechanisms are required.

Simple lockout provisions for the receptacle are also provided as an option on
the DS and DSN Series. The lockout provision on DS and DSN Series receptacles
can also be used to lock the plug and receptacle together, if desired, to prevent
unauthorized disconnection.
The split terminal causes the
spring ring to deform from a
Spring-Assisted Terminals circle to an ellipse as the
terminal screw is tightened.
Provide Superior Conductor Connections
On traditional plugs and receptacles, the loosening of terminal screws is a
common cause of failure. Our devices have patented, spring-assisted terminals
that provide more permanent and secure conductor connections.

As the terminal screw is tightened, pressure is generated against the conductor CONDUCTOR

and causes the split-terminal body to expand and elliptically deform the spring ring
around the terminal. Since the spring ring wants to return to its original circular The spring ring, trying to return
to its original circle shape, pushes
shape, it exerts a constant pressure against the terminal conductor, pushing the conductor and terminal screw
them together. This constant spring pressure on the screw and conductor helps tightly together.

to compensate for strand settlement and conductor yield, while providing superior
resistance to the effects of vibration, shock, and thermal cycling.

Field Replacement of Modular Parts

With their robust construction and reliable operation, the need to replace worn
MELTRIC parts is unusual. If a repair is needed, parts are readily available and
reasonably priced. The modular construction of Switch-Rated plugs and
receptacles makes field replacement of many components easy.

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 UNPRECENDENTED PERFORMANCE

To attain their UL/CSA switch-ratings, our Switch-Rated plugs and receptacles must pass electrical and mechanical
endurance tests, horsepower/locked-rotor overload tests, and short-circuit make and withstand tests that far
exceed the testing required of ordinary plugs and receptacles. In fact, the tests performed to achieve the devices’
switch-ratings are the same electrical performance tests required of manual motor controllers and
enclosed disconnect switches (UL 508 and UL 98 or CSA 22.2 No. 14 and 4 type devices).

The chart below compares the tests passed by MELTRIC devices to achieve their “Switch-Rated Plug and Receptacle”
listings to the tests required for a standard pin and sleeve plug and receptacle listing.

Performance Testing Comparison

MELTRIC Switch-Rated Plugs and
Pin and Sleeve Plugs and Receptacles
Receptacles
UL Subject 2682
UL 1682 & CSA 22.2 No. 182.1
(used for both UL & CSA listings)

Motor Circuit/Branch Circuit Switching Non-Current Interrupting Current Interrupting

Test

Temperature Rise < 30° < 30° < 30°

Voltage Withstand 3,000 VAC for 1 Minute 1000V + 200% of Device Rating 1000V + 200% of Device Rating

250 Operations 3 Operations 50 Operations

Overload @ 150% of Rated Current @ 150% of Rated Current @ 150% of Rated Current
(p.f. = .75 - .80) (p.f. = .75 - .80) (p.f. = .75 - .80)

Mechanical Endurance 15-20 A = 5000 Opns 15- 20 A = 0 Opns

(Plus Required Electrical 4,000 Cycles 21-63 A = 2000 Opns 21-63 A = 1000 Opns
Operations)+ 64-250 A = 250 Opns 64-250 A = 500 Opns
15-20 A = 5000 Opns
6,000 Operations 21-63 A = 1000 Opns1
Electrical Endurance @ Rated Current & Voltage
– 64- 250 A = 250 Opns1
(With Load) (p.f. = .75 - .80)
@ Rated Current & Voltage
(p.f. = .75-.80)

Overload - Locked Rotor 50 Operations

@ 600% of Motor FLA – –
(Horsepower Rated Devices)
(p.f. = .40 - .50)

Short Circuit Withstand ≥ 65 kA* – –

(600 V and ≤ .15 power factor)

Short Circuit Make ≥ 65 kA* – –

(600 V and ≤ .15 power factor)
+ Testing not required by Standard. MELTRIC conducted test for product performance verification.
1 Testing alternates between mechanical & electrical operations. This reduces the severity of the electrical test by allowing additional cooling time during
electrical testing.
* DS200 tested at 10 kA. See page 19 for specific ratings and associated fusing for each model.

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 MELTRIC Switch-Rated Plugs & Receptacles
2x Faster Change-outs

Superior User Safety

Using MELTRIC devices to connect equipment helps to protect users from
electrical hazards that are common with hardwired connections and
other types of connectors.

Switch-Rated plugs and receptacles:

•  rovide the safety of a disconnect switch wherever users

P
must make or break connections.

•  liminate potential exposure to live parts and arcing that

E
exists with other plugs and receptacles.

•  rovide protection against overloads and short circuit

P
currents of up to 100 kA with RK1 fusing.

Switch-Rated DS and DSN Series •  rovide a consistently reliable connection that does not
P
at work at a major airbase. degrade with use.

Simplify Compliance to NFPA 70E®/CSA Z462

Using MELTRIC Switch-Rated plugs and receptacles wherever electrical connections must be made or broken
can greatly simplify compliance with NFPA 70E Article 130 requirements:
• Switch ratings ensure the safe disconnection of the load; interlocks and auxiliary disconnects are not
required since MELTRIC Switch-Rated devices comply with NEC ‘line of sight’ requirements.

• A safety shutter on the receptacle prevents worker exposure to

live parts - connecting or disconnecting a MELTRIC device is
considered a normal operation and would not require arc flash PPE.

• Removal of the plug from the receptacle provides visual

verification of deenergization; the need for voltage testing
is eliminated.

• Lockout/tagout is quick and easy since all MELTRIC devices

have integral locking provisions.

• MELTRIC devices allow qualified persons to safely make/break

electrical connections; specially trained electrical personnel
may not be required on-site.

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PROVIDING BENEFITS
THROUGHOUT YOUR FACILITY

Reduce Equipment Change-Out Downtime by 50%

Replacement motors and equipment that are pre-wired with our Switch-Rated devices offer many benefits.
They can be installed with plug and play simplicity. They reduce change-out downtime by 50%, allowing
mission-critical processes to get back in operation faster.

• The need for hard-wiring during downtime is eliminated

because mechanics can safely make & break electrical
connections with the plug & play simplicity of our
Switch-Rated devices.

• There is no need to bring electricians to the site after

hours; their work to pre-wire replacements can be
performed during normal working periods.

• Advance verification of phasing on pre-wired replacement

motors avoids problems and delays due to improper rotation. MELTRIC Switch-Rated
devices enable equipment
• Integral auxiliary contacts can eliminate the need to install to be connected and
disconnected with
additional contacts to make & break secondary connections plug & play simplicity.
on control circuits.

Reduce Equipment & Operating Costs

Using our Switch-Rated devices to connect motors and other
equipment helps improve your bottom line by reducing equipment,
installation, and operating costs:

• Improved safety reduces accidents, injuries, and related costs.

• Faster change-outs reduce lost production during downtime.
• Plug & play simplicity improves maintenance personnel
utilization by allowing electrical work to be performed more
quickly and conveniently back at the electrical shop.

• Switch ratings eliminate the need for expensive and

spacious interlocks.

• Numerous configurations and mounting options help simplify

the location and installation of ‘line of sight’ disconnects.

• Reliable butt-contacts, robust construction, and long

operating lives reduce replacement costs.

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 MELTRIC
with Switch-Rated Plugs & Receptacles
Process
Maintenance Power Distribution
Equipment Panels
Safely disconnect welding Provide safe power connections
machines and other for carnival, concert, construction
inductive loads. site, railway maintenance, and
other temporary events or
work sites.

Lab & Test Wastewater

Equipment Pumps/Mixers
Protect students and technicians A qualified technician can
from live contacts and arc easily disconnect pumps and
flash. mixers for replacement or
servicing.

Kitchen Equipment Oil Rigs &

Batch Plants
The MELTRIC Switch-Rated Provide plug & play connections
DSN series is Type 4X and for quick setup and teardown.
IP69 rated, making them Create safe and convenient
ideal for washdown disconnects for process and
environments. maintenance equipment.

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Applications
Shore Power Conveyors &
Stackers
Silver-nickel contacts offer MELTRIC Switch-Rated contacts
superior corrosion resistance close (mate) with a self-cleaning,
compared to brass pin and wiping action – so they maintain
sleeve contacts. high conductivity even in dusty
and dirty environments.

Portable Equipment Cordsets

Safely and quickly connect and Cordsets equipped with MELTRIC

disconnect float pumps and plugs and receptacles provide
other equipment. the safety of a switch wherever
users make or break connections.

Motor Control Centers Portable Generators

Switch-ratings and dead-front
Enclosed arc chambers prevent construction ensure user and
user exposure to arc flash, public safety. Optional provisions
even if disconnected in locked allow the plug & receptacle to
rotor conditions. be locked together to prevent
unintended or unauthorized
disconnection.

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 MELTRIC Switch-Rated Plugs & Receptacles
Motor Connection Advantages

MELTRIC plugs and receptacles

are UL and CSA Switch-Rated
up to 100 hp and 200 A.

Safely Make/Break Connections, Even During Overloads

Our Switch-Rated plugs and receptacles are designed and rated to make and break motor loads in complete
safety while providing users with significant protection in the event of overloads or short circuits. Special
protective equipment and training are not required to make and break connections.

Approved as a ‘Line of Sight’ Disconnect

Our Switch-Rated devices are an approved ‘line of sight’ disconnect switch for meeting the requirements in
NEC Sections 430.102 – 430.109, and they are rated by UL & CSA for “Motor Circuit Disconnect Switching” and
“Branch Circuit Disconnect Switching.” Sections 430.102 – 430.109 of the National Electric Code require approved
disconnecting means to be located in a readily accessible location within sight of the motor and driven equipment.

A Variety of Mounting Options

Our plugs and receptacles are available with numerous handles, mounting
angles, wall boxes, and other accessories. They may be used as in-line connectors
or may be mounted on walls, panels, equipment, or even directly on the motor.
Since our devices function as ‘line of sight’ disconnect switches, their compact
form factor and numerous mounting options give you more flexibility in locating
them where they are easily visible and convenient to use.

Reduce Improper Motor Rotation

with Pre-Wired Replacements
Replacement motors that are pre-wired and tested with appropriately phased
receptacles at your maintenance shop will automatically provide the desired
direction of rotation when connected (plugged in) on site. Pre-wiring and testing
eliminates the need to jog the motor and avoids additional downtime and production
problems resulting from improper rotation.

Monitor Motor Temperature

Using Built-In Auxiliary Contacts
Optional integral auxiliary contacts can be used to communicate motor
temperatures back to a control center so preventative maintenance can
be performed before motor failure occurs.

Auxiliary/Pilot
Contacts

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 APPLICATION SPOTLIGHT
The Ideal Motor Plug

Plug & Play Simplicity Allows Quick Change-outs

Using our Switch-Rated plugs and receptacles to connect motors instead of hard-wiring can help reduce
equipment change-out downtime by as much as 50%. When replacement motors are pre-wired with MELTRIC
inlets or plugs, a mechanic can safely perform the electrical connections by simply unplugging the old motor
and plugging in the new one.
• No waiting for an electrician to perform field wiring.
• No “suiting-up” or extraordinary electrical precautions.
• No need to field test (jog the motor) to ensure proper rotation.

1. Switch receptacle to ‘off’ position •  hangeout downtime is

C
2. Remove plug from receptacle reduced by up to 50%.
MELTRIC Switch-Rated 3. Apply lockout/tagout •  quipment and installation
E
Plugs & Receptacles 4. Remove old/install new motor costs are reduced by eliminating
5. Remove lockout/tagout the need for interlocks and safety
6. Insert plug into receptacle switches.
•  aintenance efficiency is improved
M
Process Complete by allowing mechanics to perform
changeouts. Pre-wiring can be
done at a convenient time in the
Mechanics can quickly and safely electrical shop helping to ensure
make and break electrical connections,
without special PPE.
proper motor rotation.

AS
1. Switch disconnect to ‘off’ position 10. Connect new motor to SB LULEEMS
hard wiring
PIRS
O
2. Apply lockout/tagout
Typical Disconnect 3. Perform Shock/Arc Flash 11. Remove lockout/tagout
Switch Risk Assessment 12. Turn disconnect to the
4. Obtain permit for energized ‘ON’ position
electrical work 13. Remove and store PPE
5. Suit up with appropriate PPE
6. Remove the disconnect
MELTRIC receptacles
switch cover can be added to existing
7. Voltage test to verify deenergization disconnects. Users can then
After operating the disconnect verify blade separation and
switch, a worker still needs to verify 8. Disconnect motor from hard-wiring deenergization without
deenergization. Exposure to live parts needing PPE.
is inevitable, so PPE is required.
9. Remove old/install new motor

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 DSN & DS
TWO SERIES TO CHOOSE FROM:

DSN DS
• 20 – 150 A, 600 VAC • 20 – 200 A, 600 VAC

• .75 – 75 hp • .75 – 100 hp

• Compact and lightweight • Type 3R or 4X

• Type 4X/IP69/IP69K • Larger wiring capacity,

or IP66/IP67 rugged durability

• Configurable with up to • Configurable with up to

6 auxiliary contacts 6 auxiliary contacts

• Fiberglass reinforced • Available in fiberglass

thermoplastic poly casings reinforced thermoplastic
resist shock, chemicals, poly or aluminum alloy
and UV rays casings – both materials
resist shock, chemicals,
and UV rays

Ratings & Listings

General Ratings
Short-Circuit
Product Amperage Voltage Frequency Horsepower Environmental Temperature
(make & Withstand)
min -40°F/
DS 20 – 200 A 600 VAC 60 – 400 Hz .75 to 100 hp 10 kA to 100 kA** Type 3R or 4X*
max 140°F
min -40°F/
DSN 20 – 150 A 600 VAC 60 – 400 Hz .75 to 75 hp 100 kA** Type 4X, IP69/IP69K
max 140°F
* DS20 and DS30 are 3R, with Type 4X available as an option.
** DS20, 30, 60, 100C and all DSN’s are rated 100 kA. DS100 is rated 65 kA and DS200 is rated 10 kA. Testing was performed with RK1 current limiting
fuses sized at 400% of the highest full load motor ampacity associated with the device’s hp rating. DSN150 is 100 kA Close & Withstand with 225 A
RK1 non-time delay Mersen fuses (or 10 kA with 400 A fuses).

Listings
Category UL CSA IEC
Plugs and Receptacles UL 1682 C22.2 No. 182.1 60309-1
Branch Circuit Disconnect UL Subject 2682 UL Subject 2682
Switching (AC only) (Performance tested to UL 98) (Performance tested to C22.2 No. 4)
60947-3 (AC22 or AC23)
Motor Circuit Disconnect UL Subject 2682 UL Subject 2682
Switching (AC only) (Performance tested to UL 508) (Performance tested to C22.2 No. 14)
CE ratings available upon request

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PRODUCT
Selection Guide
MELTRIC SWITCH-RATED Models & Ratings

DSN Series DS Series

Key Features Compact, Type 4X High Amperage, Metal or Poly Casings
Model 20 30 60 100 150 20 30 60 100C 100 200

Branch Circuit Disconnect Switch Ratings (A.C. only)

Amperage 20 A 30 A 60 A 100 A 150 A 20 A 30 A 60 A 100 A 100 A 200 A

Max VAC 600 V 600 V 600 V 600 V 600 V 600 V 600 V 600 V 600 V 600 V 600 V

Motor Circuit Disconnect Switch Ratings - Horsepower (A.C. only)

120 V 1Ø .75 hp 1 hp 2 hp 5 hp 7.5 hp .75 hp 1.5 hp 3 hp 5 hp 3 hp –

240 V 1Ø 2 hp 3 hp 3 hp 10 hp 20 hp 1.5 hp 3 hp 5 hp 10 hp 7.5 hp –

208 V 3Ø 3 hp 5 hp 7.5 hp 20 hp 30 hp 3 hp 5 hp 10 hp 20 hp 10 hp 40 hp

240 V 3Ø 3 hp 5 hp 7.5 hp 20 hp 30 hp 5 hp 5 hp 10 hp 20 hp 10 hp 40 hp

480 V 3Ø 7.5 hp 10 hp 20 hp 50 hp 75 hp 7.5 hp 15 hp 25 hp 50 hp 30 hp 100 hp

600 V 3Ø 7.5 hp 15 hp 20 hp 50 hp 75 hp 10 hp 15 hp 25 hp 50 hp – 100 hp

Short Circuit Closing & Withstand Ratings (A.C. only)

S.C. Rating 100 kA 100 kA 100 kA 100 kA 100 kA 100 kA 100 kA 100 kA 100 kA 65 kA 10 kA

Fuse Type RK1 RK1 RK1 RK1 RK1 RK1 RK1 RK1 RK1 RK1 RK1

Fuse Size 35 A 125 A 110 A 250 A 225 A 80 A 125 A 250 A 250 A 175 A 500 A

Casing Materials
Standard Poly Poly Poly Poly/Metal Poly/Metal Poly Poly Poly/Metal Poly/Metal Poly/Metal Metal

Environmental Ratings
Type 4X 4X 4X 4X 4X 3R+ 3R+ 4X 4X 4X 4X

IP 69/69K 69/69K 69/69K 69/69K 69/69K – – – – – –

Temp. Max 140˚F 140˚F 140˚F 140˚F 140˚F 140˚F 140˚F 140˚F 140˚F 140˚F 140˚F

Temp. Min -40˚F -40˚F -40˚F -40˚F -40˚F -40˚F -40˚F -40˚F -40˚F -40˚F -40˚F

Optional Auxiliary Contacts

Max Number 2* 2 4 4 6 2 4 4 4 6 6

A@120 VAC .60 A 6A 6A 6A 1.5 A 6A 6A 6A 6A 1.5 A 1.5 A

A@240 VAC .30 A 3A 3A 3A .75 A 3A 3A 3A 3A .75 A .75 A

A@480 VAC – 1.5 A 1.5 A 1.5 A .37 A 1.5 A 1.5 A 1.5 A 1.5 A .37 A .37 A

A@600 VAC – 1.2 A 1.2 A 1.2 A .30 A 1.2 A 1.2 A 1.2 A 1.2 A .3 A .3 A

Wiring Terminal Capacities - AWG THHN

Phase – Max 12 8 4 2 2/0 8 4 2 2 2/0 4/0

Phase – Min 14 14 12 10 4 14 12 10 10 4 4

Aux – Max 18 14 14 14 14 14 14 14 14 14 14

+ Type 4X is available as an option

* U
 nlike other DSN and DS products, the DSN20 pilots are only on the receptacle side and create a continuity loop that is completed when a plug is
connected to the receptacle

19
 MELTRIC Switch-Rated
DSN & DS Series
Features
Our Switch-Rated DS and DSN Series devices are based on a similar design
concept. Together, they provide a range of Switch-Rated plugs and
receptacles that allow users to safely and easily make and break
connections under full load in applications up to 200 A and 100 hp.
In conjunction with their automatic watertightness, their wide
range of available ratings make them ideal choices for most
industrial applications.

The larger DS Series provides Type 3R protection suitable

for most outdoor applications.

The more compact DSN Series provides Type 4X/IP69/

IP69K protection needed for washdown applications.

OFF Button
DECONTACTOR™
Technology Press to deenergize. Provides Casing
push-button circuit disconnection.
Fiberglass reinforced thermoplastic
polyester material offers great
resistance to impact, corrosion, and
harsh environmental conditions.
Spring Assisted Screw Terminals
Patented design ensures “Tighten
and Forget” confidence. Silver-Nickel Contact Material
Solid silver-nickel contact surfaces
provide superior conductivity, durability,
Spring-Loaded Butt-Style Contacts
and corrosion resistance.
Ensures optimal contact force and
superior electrical performance over
Lockout-Tagout Provisions
thousands of operations.
Allows plug to be easily locked
Lid out and tagged. Optional
Padlock Pawl allows lockout/
Provides 4X/IP69/IP69K
Dead-Front Safety Shutter tagout of the receptacle.
watertightness for additional
protection in harsh environments. Ensures safety by preventing
user access to live parts.

20
Watertight Every Time You Connect

On many pin & sleeve devices, an additional sealing ring must be

tightened in order to achieve rated watertightness. Users frequently
fail to tighten the sealing ring, resulting in leakage.

DS and DSN Series devices have a “foolproof” design that eliminates the
sealing ring. DS models achieve their 3R ratings by simply mating the plug
to the receptacle. After the removal of the plug, rated watertightness is main-
tained for the receptacle by simply closing the lid.

DS or DSN Series – Which Model is Best for Your Applications?

The DS and DSN Series use the same basic technology and design but have differentiating physical
characteristics and features.

DSN DS
• 20 – 150 A • 20 – 200 A
• .75 – 75 hp • .75 – 100 hp

• Type 4X/IP69/IP69K • Type 3R or 4X+

• Poly and metal casings • Poly and metal
(some sizes) casings (some sizes)

• Smaller compact size • Larger contacts

and terminals
+DS20 and DS30 are 3R, with Type 4X available
as an option.

60 A
Relative Size Comparison

Operating Instructions

To reconnect, insert
plug into receptacle,
rotate 30° clockwise,
and continue to

1 2 3 4 insert until latched.

When the plug and receptacle Pressing the pawl causes Rotating the ‘dead’ plug 30° The plug and the receptacle
are latched together, the the receptacle to break the counterclockwise closes the are separated. The receptacle’s
circuit is connected. circuit. The plug is ejected to safety shutter and frees the safety shutter prevents
its rest position. The contacts plug to be withdrawn from access to input power and
are electrically dead. the receptacle. live parts.

21
 MELTRIC Standard Accessories
For Installation & Operational Flexibility

Handle Options
for All Applications
We carry a large variety of handles to suit your needs.
These include poly, metal with or without NPT, poly or
metal with cord grips, and poly handle with clamp and
bushing. Santoprene™ handles are also available if a
rubber handle is preferred.

Poly Handle w/Cord Grip Poly Handle w/Clamp Santoprene™

Handle & Bushing Handle
Optional Cord Grip
with Wire Mesh

Pawl Options: Larger & Lockable

Locking device
A mushroom pawl with a larger and easier to actuate stop button not included
is available for applications where emergency disconnections
may be required. Padlock pawls include a .32” diameter hole
through the pawl to permit the insertion of a padlock, allowing
users to lock the receptacle lid closed or lock the plug and
receptacle in the connected state.

Mushroom Padlockable
Pawl Pawl

22
Angles & Boxes
for the Perfect Orientation
We offer a variety of poly and metal angles and adapters
to help you locate and position your devices in the most
effective orientation for your application. We also offer a
range of metal and poly junction boxes to support all sizes
of our Switch-Rated devices, and adapter plates to allow
devices to be mounted on existing boxes.

Nylon Metal 30° 70° Adapter

Conduit Entry Junction Box Metal Angle Metal Angle Plate

Finger Drawplates & Drawbars

for Easier Closure

Optional finger drawplates are recommended for easier closure of DS and DSN
devices when used as cord-to-cord connectors up to 100 A. An easy-closing
mechanism is a standard feature on models DSN150, DS100, and DS200.

Finger Drawplates Easy-Closing

Mechanism
23
 Solutions for All Your Electrical
Connection Needs
In addition to the innovative Switch-Rated devices featured in this brochure, we offer a full line of other
plugs and receptacles providing solutions for a broad range of electrical connection applications.

Explore the Complete Line of MELTRIC Plugs, Receptacles,

and Accessories

• Multipin devices available with 4-37 contacts • High Amperage devices, up to-600 A

• Hazardous Location devices for Class 1 & 2 • Power Distribution—Rubber Boxes, Panel
Div 2 and Zone 1/21 & 2/22 environments Assemblies, Custom Configurations,
GFCI/Receptacle Combinations, and more
• High Temperature devices, up to 30 A, 465°F

Multipin Hazardous High Temp High Power

Location Amperage Distribution

Our friendly engineering and customer service teams are available

Monday - Friday, 7 a.m. - 5 p.m. (Central Time)

Phone: 414-433-2700
Email: mail@meltric.com

Plug into S AFETY and RELIABILITY with MELTRIC

Manufactured in the USA

meltric.com
4765 W. Oakwood Park Drive • Franklin, WI 53132
414-433-2700 • Fax 414-433-2701
©2021 MELTRIC Corporation. All rights reserved. SWITCH-RATED F