Cutler Hammer Citation A10 Thermal Overload Heater Units
Cutler Hammer Motor Starters Cutler Hammer - Freedom Series Heater Units Cutler Hammer Parts
 

Cutler Hammer Citation A10 Overload Relay Heater Elements for Motor Protection

Cutler Hammer Citation A10 heater coils protect 40C rise motors, and open motors that have a service factor of 1.15, as well as 50, 55, and 75 C rise motors, enclosed motors with a service factor of 1.0. The ultimate tripping current of heater coils is approximately 1.25 times what is listed as the minimum current in the tables. For reliable protection, select the heater coils based on the full load rating shown on the motor nameplate.

Index of overload relay heater coil selection tables

Catalog Number Type Heater Coil Selection Table Numbers
NEMA Size of Starter
00-0-1
(1-1/2)
2 3 4 5 6 7 8
A10 Open Enclosed ST-1
ST-2
ST-3
ST-4
ST-5
ST-6
ST-7
ST-7
ST-16
ST-16
ST-10
ST-10
ST-11
ST-11
ST-12
ST-12
A11 Open Enclosed BNC-1 BNC-2 BNC-3
BNC-4
BNC-5
BNC-6
BNC-7
BNC-7
BNC-9
BNC-9
     
A13 Open Enclosed LT-2
LT-1
LT-4
LT-3
LT-6
LT-5
LT-7
LT-7
LT-8
LT-8
     
A30 & A40 Enclosed ST-9 ST-3 ST-6 ST-7 ST-16 ST-10 ST-11 ST-12
A31 & A40 Enclosed BNC-8 BNC-3 BNC-6 BNC-7 BNC-9      
A50 Open Enclosed ST-1
ST-2
ST-3
ST-4
ST-5
ST-6
ST-7
ST-7
  ST-10
ST-10
ST-11
ST-11
ST-12
ST-12
A51 Enclosed BNC-1 BNC-2 BNC-3
BNC-4
BNC-5
BNC-6
BNC-7
BNC-7
BNC-9
BNC-9
     
A70 & A80 Enclosed ST-9 ST-3 ST-5 ST-7 ST-16 ST-10 ST-11 ST-12
A71 & A81 Enclosed BNC-8 BNC-3 BNC-5 BNC-7 BNC-9      
A400 - A420 Enclosed     ST-14 ST-15 ST-16 ST-10 ST-11 ST-12
A460 Enclosed ST-21 ST-41 ST-61 ST-71 ST-161 ST-101 ST-111 ST-121
A490 Enclosed ST-22 ST-42 ST-62 ST-72 ST-162 ST-102 ST-112 ST-122
A700 Open Enclosed ST-1
ST-2
ST-3
ST-4
ST-5
ST-6
ST-7
ST-7
ST-16
ST-16
-
ST-10
   
A800-A803 Enclosed ST-9 ST-3 ST-5 ST-7 ST-16 ST-10 ST-11  
A804-A806 Enclosed ST-9 ST-3 ST-5          
A808-A809 Enclosed   ST-13 ST-5 ST-5        
B10 B50 Enclosed ST-1 ST-3 ST-5 ST-7        
B11 & B51 Open Enclosed BNC-1 BNC-2 -
BNC-3
-
BNC-5
         
C300 Open & Enclosed ST-1 ST-3 ST-5 ST-7        
C301 Open & Enclosed BNC-1 BNC-4 BNC-5 BNC-7        
C303 Open & Enclosed LT-2 LT-4 LT-6 LT-7        

1Select heater coils for 50% of rated full load current 
2
Select heater coils for 58% of rated full load current

 

Heater Coils For Overload Relays
Type ST Standard Trip
Eutectic Allow Overload Relay

For Motors With 1.15 Service Factor

Table ST-1 Table ST-2 Table ST-3 Table ST-4 Table ST-5 Table ST-6 Heater Coil Catalog Number
NEMA Sizes 00, 0, 1, 1 1/2 NEMA Size 2 NEMA Size 3
For Open Type Car. No. A10, A50, A700, B10, B50, C300 For Enclosed Type Cat No. B10, B50, C300 For Enclosed Type Cat. No. A10, A50, A4601, A4902, A700 For Open Type Car. No. A10, A50, A700, B10, B50, C300 For Enclosed Type Cat No. B10, C300, A30, A40, A70, A80, A800-A803 For Enclosed Type Cat. No. A10, A50, A4601, A4902, A700 For Open Type Car. No. A10, A50, A700, B10, B50, C300 For Enclosed Type Cat. No. A70, A80, A800-A803, A808-A809, B10 For Enclosed Type Cat. No. A10, A50, A4601, A4902, A700
.167 -.187
.188 - .210
.211 - .237
.238 - .266
.267 - .298
.155 - .173
.174 - .195
.196 - .220
.221 - .247
.248 - .278
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H1101
H1102
H1103
H1104
H1105
.299 - .334
.335 - .376
.377 - .422
.423 - .474
.475 - .532
.279 - .310
.311 - .349
.350 - .391
.392 - .441
.442 - .495
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H1106
H1107
H1108
H1109
H1110
.533 - .598
.599 - .672
.673 - .757
.758 - .855
.856 - .959
.496 - .555
.556 - .624
.625 - .703
.704 - .795
.796 - .895
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H1111
H1112
H1113
H1114
H1115
.960 - 1.07
1.08 - 1.21
.896 - .999
1.00 - 1.12
-
-
-
-
-
-
-
-
H1116
H1117
1.22 - 1.35
1.36 - 1.52
1.53 - 1.70
1.13 - 1.25
1.26 - 1.41
1.42 - 1.58
-
-
-
-
-
-
-
-
-
-
-
-
H1018
H1019
H1020
1.71 - 1.90
1.91 - 2.10
2.11 - 2.33
2.34 - 2.62
2.63 - 2.93
1.59 - 1.77
1.78 - 1.96
1.97 - 2.17
2.18 - 2.44
2.45 - 2.72
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H1021
H1022
H1023
H1024
H1025
2.94 - 3.27
3.28 - 3.64
3.65 - 4.06
4.07 - 4.55
4.56 - 5.03
2.73 - 3.04
3.05 - 3.38
3.39 - 3.73
3.74 - 4.18
4.19 - 4.63
-
-
3.72 - 4.10
4.11 - 4.59
4.60 - 5.07
-
-
-
3.86 - 4.31
4.32 - 4.77
    H1026
H1066
H1027
H1028
H1039
5.04 - 5.59
5.60 - 6.25
6.26 - 6.92
6.93 - 7.75
7.76 - 8.63
4.64 - 5.15
5.16 - 5.68
5.69 - 6.30
6.31 - 7.05
7.06 - 7.76
5.08 - 5.65
5.66 - 6.29
6.30 - 7.00
7.01 - 7.82
7.83 - 8.79
4.78 - 5.31
5.32 - 5.90
5.91 - 6.55
6.56 - 7.33
7.34 - 8.15
-
-
-
-
8.32 - 9.27
-
-
-
-
8.24 - 9.19
H1030
H1031
H1032
H1033
H1034
8.64 - 9.59
9.60 - 10.6
10.7 - 11.9
12.0 - 13.3
13.4 - 14.7
7.77 - 8.63
8.64 - 9.51
9.52 - 10.5
10.6 - 11.8
11.9 - 13.1
8.80 - 9.67
9.68 - 10.8
10.9 - 12.0
12.1 - 13.4
13.5 - 14.9
8.16 - 9.03
9.04 - 10.1
10.2 - 11.2
11.3 - 12.5
12.6 - 13.9
9.28 - 10.1
10.2 - 11.4
11.5 - 12.8
12.9 - 14.3
14.4 - 16.0
9.20 - 10.1
10.2 - 11.3
11.4 - 12.7
12.8 - 14.1
14.2 - 15.8
H1035
H1036
H1037
H1038
H1039
14.8 - 16.6
16.7 - 18.8
18.9 - 21.2
21.3 - 23.9
24.0 - 27.0 
13.2 - 14.8
14.9 - 16.7
16.8 - 18.9
19.0 - 21.3
21.4 - 24.1
15.0 - 17.6
17.7 - 19.0
19.1 - 21.5
21.6 - 24.5
24.6 - 27.9
14.0 - 15.7
15.8 - 17.5
17.6 - 19.8
19.9 - 22.3
22.4 - 25.4
16.1 - 17.8
17.9 - 20.3
20.4 - 22.9
23.0 - 26.0
26.1 - 29.5
15.9 - 17.7
17.8 - 20.1
20.2 - 22.7
22.8 - 25.5
25.6 - 28.9
H1040
H1041
H1042
H1043
H1044
  24.2 - 27.0
-
-
-
-
28.0 - 32.0
32.1 - 36.6
36.7 - 41.8
41.9 - 45.
-
25.5 - 28.7
28.8 - 32.5
32.6 - 36.6
36.7 - 41.0
41.1 - 45
29.6 - 33.5
33.6 - 37.8
37.9 - 42.8
42.9 - 48.5
48.6 - 55.1
29.0 - 32.5
32.6 - 36.7
36.8 - 41.0
41.1 - 46.0
46.1 - 51.8
H1045
H1046
H1047
H1048
H1049
        55.2 - 62.3
62.4 - 69.5
69.6 - 79.1
79.2 - 90.0
-
51.9 - 58.6
58.7 - 64.6
64.7 - 72.7
72.8 - 83.1
83.2 - 90.0
H1050
H1051
H1052
H1053
H1054

1Select heater coils for 50% of rated full load current 
2
Select heater coils for 58% of rated full load current              [Back To Top]

 

Table ST-7 Heater Coil Catalog Number
NEMA Size 4
For Open Type Cat. No. A10, A50, C300
For Enclosed Type Cat. No. A10, A30, A40, A50, A70, A80, A4601, A4902, A700, A800-A803
Heater Coil Ampere Range
-
-
-
-
-
H1034
H1035
H1036
H1037
H1038
-
-
20.6 - 23.-
23.4 - 26.3
H1039
H1040
H1041
H1042
H1043
26.4 - 30.8
30.9 - 34.0
34.1 - 38.3
38.4 - 43.4
43.5 - 49.3
H1044
H1045
H1046
H1047
H1048
49.4 - 55.8
55.9 - 63.1
63.2 - 70.4
70.5 - 79.9
80.0 - 92.7
H1049
H1050
H1051
H1052
H1054
92.8 - 105
106 - 121
122 - 135
H1055
H1056
H1057

1Select heater coils for 50% of rated full load current 
2
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Table ST-9 Heater Coil Catalog Number
NEMA Size 0 & 1
For Enclosed Type Cat. No. A30, A40, A70, A80, A800-A803
Heater Coil Ampere Range
.164 - .183
.184 - .205
.206 - .232
.233 - .260
.261 - .293
H1101
H1102
H1103
H1104
H1105
.294 - .328
.329 - .369
.370 - .414
.415 - .465
.466 - .522
H1106
H1107
H1108
H1109
H1110
.523 - .586
.587 - .659
.660 - .743
.744 - .839
.840 - .943
H1111
H1112
H1113
H1114
H1115
.944 - 1.05
1.06 - 1.17
H1116
H1117
1.18 - 1.31
1.32 - 1.47
1.48 - 1.66
H1018
H1019
H1020
1.67 - 1.85
1.86 - 2.06
2.05 - 2.26
2.27 - 2.54
2.55 - 2.85
H1021
H1022
H1023
H1024
H1025
2.86 - 3.18
3.19 - 3.53
3.54 - 3.95
3.96 - 4.41
4.42 - 4.88
H1026
H1066
H1027
H1028
H1029
4.89 - 5.42
5.43 - 6.07
6.08 - 6.64
6.65 - 7.43
7.44 - 8.23
H1030
H1031
H1032
H1033
H1034
8.24 - 9.19
9.20 - 10.1
10.2 - 11.3
11.4 - 12.6
12.7 - 14.0
H1035
H1036
H1037
H1038
H1039
14.1 - 15.7
15.8 - 17.7
17.8 - 19.8
19.9 - 22.0
22.1 - 24.9
25.0 - 27.0
H1040
H1041
H1042
H1043
H1044
H1045

 

Table ST-10 Table ST-11 Table ST-12 Heater Coil Catalog Number
NEMA Size 6 NEMA Size 7 NEMA Size 8
For Open Type - Cat. No. A10, A50, A700
For Enclosed Type - Cat. No. A10, A30, A40, A50, A70, A80, A400, A4601, A4902, A700
Heater Coil Ampere Range
-
154-171
172-192
193-215
229 - 255
256 - 287
288 - 321
322 - 359
-
384 - 429
430 - 482
483 - 538
H1018
H1019
H1020
H1021
216 - 237
238 - 263
264 - 295
296 - 330
331 - 369
360 -397
398 - 439
440 - 492
493 - 551
552 - 615
539 - 595
596 - 657
658 - 741
742 - 827
828 - 924
H1022
H1023
H1024
H1025
H1026
370 - 410
411 - 458
459 - 512
513 - 574
616 - 685
686 - 763
764 -855
-
925 - 1027
1028 - 1147
1148 - 1285
-
H1066
H1027
H1028
H1029

1Select heater coils for 50% of rated full load current 
2
Select heater coils for 58% of rated full load current              [Back To Top]

 
 

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