Slotted Optical Switch

OPB818

Features:
• Choice of aperture
• Choice of opaque or IR transmissive shell material
• Non-contact switching
• Mounts directly to PCBoard or dual-in-line socket
• 0.400” (10.16 mm) lead spacing
• 0.200” (5.08 mm) slot width. 0.250” (6.35 mm) slot depth

Description:
The OPB818 slotted switch consists of an infrared emitting diode and an NPN silicon phototransistor mounted in a low-cost
black plastic housing on opposite sides of a 0.200” (5.080 mm) wide slot. Switching of the phototransistor occurs whenever
an opaque object passes through the slot.

The OPB818 is designed for direct soldering into PCBoards or for mounting in standard dual-in-line sockets and has an
0.25” (6.35 mm) deep and 0.20” (5.08 mm) wide slot. The apertures are 0.033” (0.84 mm) in diameter on both the sensor
side (“S”) as well as on the emitter side (“E”).

Applications: Ordering Information

• Non-contact object sensing Part
Description
• Assembly line automation Number
• Machine automation
Slotted Optical Switch
• Equipment security OPB818 (mounts directly to PCBoards or
• Machine safety to dual-in-line socket)

Pin # Description Pin # Description

1 Anode 4 Collector

2 Cathode 3 Emitter

1 4

2 3

[ MILLIMETERS]
DIMENSIONS ARE IN:
INCHES

General Note
TT Electronics | OPTEK Technology
TT Electronics reserves the right to make changes in product specification without
2900 E. Plano Pkwy, Plano, TX 75074 | Ph: +1 972 323 2200
notice or liability. All information is subject to TT Electronics’ own data and is
www.ttelectronics.com | sensors@ttelectronics.com
considered accurate at time of going to print.
© TT electronics plc Issue C 11/2016 Page 1
Slotted Optical Switch
OPB818

Electrical Specifications

Absolute Maximum Ratings (TA=25°C unless otherwise noted)

Storage & Operating Temperature Range -40°C to +85° C
(1)
Lead Soldering Temperature [1/16 inch (1.6 mm) from the case for 5 sec. with soldering iron] 260° C
Input Diode
Forward DC Current 50 mA
Peak Forward Current (1 µs pulse width, 300 pps) 1A
Power Dissipation(2) 75 mW
Output Phototransistor
Collector-Emitter Voltage 30 V

Emitter-Collector Voltage 5V

Collector DC Current 30 mA
(2)
Power Dissipation 100 mW

Electrical Characteristics (TA = 25°C unless otherwise noted)

SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS

Input Diode (see OP240 for additional information)

VF Forward Voltage - - 1.7 V IF = 20 mA
IR Reverse Current - - - - Not designed for reverse operation
Output Phototransistor (see OP550 for additional information)
V(BR)(CEO) Collector-Emitter Breakdown Voltage 30 - - V IC =1 mA
V(BR)(ECO) Emitter-Collector Breakdown Voltage 5 - - V IE = 100 µA
ICEO Collector-Emitter Leakage Current - - 100 nA VCE = 10 V, IF = 0, EE = 0
Coupled
IC(ON) On-State Collector Current 100 - - µA VCE = 10 V, IF = 20 mA
VCE(SAT) Collector-Emitter Saturation Voltage - - 0.4 V IC = 50 µA, IF = 20 mA
Notes:
(1) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering.
(2) Derate linearly 1.67 mW/°C above 25° C.
(3) All parameters were tested using pulse techniques.
(4) Leads are 0.20” square (5.080 mm) and 0.425” long (10.80 mm), minimum.
(5) Methanol or isopropanol are recommended as cleaning agents. Plastic housing is soluble in chlorinated hydrocarbons and ketones. Spray
and wipe; do not submerge.
(6) Polarity is denoted by color of housing top: LED (gray or clear), sensor (black).
(7) Do not apply reverse voltage to LED. LED will be a 0V in reverse voltage and draw current as if a short.

General Note
TT Electronics | OPTEK Technology
TT Electronics reserves the right to make changes in product specification without
2900 E. Plano Pkwy, Plano, TX 75074 | Ph: +1 972 323 2200
notice or liability. All information is subject to TT Electronics’ own data and is
www.ttelectronics.com | sensors@ttelectronics.com
considered accurate at time of going to print.
© TT electronics plc Issue C 11/2016 Page 2
Slotted Optical Switch
OPB818

Performance

OPB818 - Flag in Middle of Slot

1.20

1.00
Typical Ic(on) Response (mA)

0.80

0.60

0.40
Top to Bottom
Left to Right
0.20

0.00
0.00 0.05 0.10 0.15 0.20 0.25
Displacement Distance (inches)

Top to Bottom
0

Emitter

Left to Right Right to Left

Sensor

0 Width

General Note
TT Electronics | OPTEK Technology
TT Electronics reserves the right to make changes in product specification without
2900 E. Plano Pkwy, Plano, TX 75074 | Ph: +1 972 323 2200
notice or liability. All information is subject to TT Electronics’ own data and is
www.ttelectronics.com | sensors@ttelectronics.com
considered accurate at time of going to print.
© TT electronics plc Issue C 11/2016 Page 3