MN Thermal Overload Relays
MN Thermal Overload Relays, available from 0.2A to 570A complement the MNX range of power contactors. The
relays are ambient temperature compensated, and the unique double slide mechanism provides reliable
protection against single phasing. MN 12L relays with trip class 30 are specially designed for long starting time
applications.
Technical Details 40
Available in 3 frame sizes from 0.2-570A
l
Direct mounting on MNX contactors
l
Trip class 10A (30 available in MN 12L)
l
Ambient temperature compensated
l
Built-in single phasing protection
l
MN 2 MN 5 MN 12 MN 12L
Conformance to standards IS/IEC 60947-4-1 & IEC 60947-4-1
Direct Direct
Mounting
Separate Separate Separate Separate
MNX 9, 12, 18 MNX 45, 50, MNX 95, 110, 140, 185, 225, 265
Suitable for contactors
22, 25, 32, 40 70, 80 325, 400, 550
Rated insulation voltage Ui 690 V 690 V 690 V 690 V
Rated impulse voltage Uimp 6 kV 6 kV 6 kV 6 kV
0 0
Service temperature -5 C to 55 C
Start / OFF / Reset 1 Start & OFF / Reset
Built-in contacts 2 NO + 1 NC 2 NO + 1 NC 2 NO + 1 NC 2 NO + 1 NC
24 V 6A 6A 6A 6A
110 V 5A 5A 5A 5A
Rated operational current
for AC-15 utilization category 220 V 3A 3A 3A 3A
at 50 Hz
380 / 415 V 2A 2A 2A 2A
500 V 2A 2A 2A 2A
Trip class 10A 10A 10A 30
Max. frequency of operations Cycles / hr. 30 30 30 30
Main terminal capacity Lug (mm2) 10 50 240 240
2
Aux. terminal capacity Wires (mm ) 2 x 2.5 2 x 2.5 2 x 2.5 2 x 2.5
MN Thermal Overload Relays
41 I-T Characteristics
MN 2 / MN 5 / MN 12 Relay MN 2 / MN 5 / MN 12 Relay
10 10000
8 8
6 6
4 4
2 2
Tripping Characteristics
Tripping characteristics
3 Poles Loaded
10 2 Poles Loaded
1000
8 8
6 6
4 4
COLD
2 2
Time (S)
Time (S)
COLD
10
100
8 8
6 6
4 4
2 2
10 HOT HOT
10
8 8
6 6
4 4
2 2
fn fn
0 0.7 0.8 0.9 11.05 1.2 1.5 2 3 4 5 6 7 8 9 10 x 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.9 1 2 3 4 5 6 7 8 9 10
Multiples of set current Multiples of set current
MN 12L Relay
104
8
6
2
Tripping Characteristics
3 Poles Loaded
3
10
8
6
COLD
2
Time (S)
102
8
6
10
1 HOT
8
6
fn
0 0.7 0.8 0.9 11.05 1.2 1.5 2 3 4 5 6 7 8 9 10
Multiples of set current
Accessories 42
MN Relays
Relay Mounting Kit Kit for Mounting MN5 Relay DIN Rail Mounting Kit MN2 Relay
Description Cat. No. Std. Pkg. (Nos.)
Push button unit for MK 1 / ML Relays SS90004OOOO 1
Push button extension unit for MN 2 Relays SS94968OOOO 100
Kit for Mounting MN 2 Relay on ML 1.5 contactor SS94701OOOO 50
Kit for Mounting MN 2 Relay separately (Direct Mounting Type) SS94700OOOO 50
Kit for Mounting MN 5 Relay on MNX 95 / 110 / 140 contactor SS94638OOOO 20
Kit for Mounting MN 5 Relay on ML 2 / ML 3 contactor SS94151OOOO 20
Kit for Mounting MN 5 Relay on ML 4 / ML 6 contactor SS94152OOOO 20
DIN Rail Mounting Kit Relay on MN 2 Relay SS91887OOOO 50
Relay Reset Cord For MN 2 Relay
400 mm 650 mm 900 mm 1200 mm
Description Cat. No. Std. Pkg. (Nos.)
MN 2 Relay reset cord - 400 mm SB94207OOOO 1
MN 2 Relay reset cord - 650 mm SB94208OOOO 1
MN 2 Relay reset cord - 900 mm SB94209OOOO 1
MN 2 Relay reset cord - 1200 mm SB94210OOOO 1
MN Thermal Overload Relays
43 Ordering Information
Type Range (A) Cat. No.
0.2 - 0.33 SS94141OOEO
0.3 - 0.5 SS94141OOGO
0.45 - 0.75 SS94141OOJO
0.6 - 1 SS94141OOKO
0.9 - 1.5 SS94141OOMO
1.4 - 2.3 SS94141OOPO
2 - 3.3 SS94141OOQO
MN 2
3-5 SS94141OOSO
4.5 - 7.5 SS94141OOUO
6 - 10 SS94142OOVO
9 - 15 SS94142OOBO
14 - 23 SS94144OODO
20 - 33 SS94145OOEO
24 - 40 SS94145OOFO
Type Range (A) Cat. No.
9 - 15 SS94135OOBO
14 - 23 SS94135OODO
20 - 33 SS94136OOEO
MN 5
30 - 50 SS94136OOGO
45 - 75 SS94137OOJO
66 - 110 SS94137OOKO
Note: MN 5 relays of lower ratings available on request
Type Range (A) Cat. No.
28 - 46.5 SB94211OOGO
42 - 69 SS94138OOHO
60 - 100 SS94138OOKO
MN 12 90 - 150 SS94138OOMO
135 - 225 SS94138OOPO
180 - 300 SS94139OOQO
270 - 450 SS94139OORO
Note: MN 12 relays of lower ratings available on request
Type Range (A) Cat. No.
42 - 69 SS94127OOHO
60 - 100 SS94127OOKO
90 - 150 SS94127OOMO
MN 12L*
135 - 225 SS94127OOPO
180 - 300 SS94127OOQO
340 - 570 SS94127OOSO
*For motors with long starting time
Overall Dimensions 44
Thermal Overload Relay - Type MN
MN 2 (Separate Mounting) MN 5 (Separate Mounting)
Push Button Push Button
Travel Travel
3.5
3.5
2
101.5
94
88.5
89
81
72.5
8.5
36.5
M4 x 10 56.5
Mounting 25.3
Screw Fixing Screws M5 - 2 Nos Suitable for M6
6
8
13.5 13.5 8
13 13
16
14
32
65.5
35
30
55
9
99.5
9
30
35
17.5
START & OFF / Reset Version
START OFF / RESET
36
OR
95 97
26.5
1/L1 3/L2 5/L3
21.5
9
I
98 19 27
94 96 2/T1 4/T2 6/T3
71.5
Auxiliary Contact Arrangement
MN 12 / 12L (Relay)
Travel - 3.5mm
Push Button
182
169
5
88
53
10
82
160 4 Mounting Slots
130 to Suit M5
2/T1
1/L1
60
4/T2
3/L2
7
OR
60
15
9
7
30
5/L3
6/T3
44.3 To suit M.12 Ø13
70
All dimensions in mm.
MN Thermal Overload Relays
