Square D

  Below is a list of tables of overload heaters for the more common applications.

  To see the Square D thermal selection chart please visit pages 21 & 22 of the Square D e-catalog.

  To see a full list of the tables please visit pages 25 through 42 of the Square D e-catalog.

 

 Table 1 Table 2 Table 3 Table 4
 Table 13 Table 17 Table 18 Table 49
Table 54 Table 56

 

Table 1

Motor FLC (A)

Thermal

Unit

Number

1 T.U.

3 T.U.

0.33–0.36
0.37–0.40
0.41–0.45
0.46–0.52
0.53–0.59  

0.29–0.32
0.33–0.36
0.37–0.39
0.40–0.47
0.48–0.56  

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71  

0.60–0.66
0.67–0.73
0.74–0.81
0.82–0.91
0.92–1.02  

0.57–0.63
0.64–0.69
0.70–0.77
0.78–0.86
0.87–0.96  

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30  

1.03–1.14
1.15–1.29
1.20–1.42
1.43–1.64
1.65–1.80  

0.97–1.11
1.12–1.23
1.24–1.37
1.38–1.55
1.56–1.75  

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40  

1.81–2.10
2.11–2.30
2.31–2.61
2.62–2.99
3.00–3.37  

1.76–1.92
1.93–2.16
2.17–2.50
2.51–2.81
2.82–3.16  

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15  

3.38–3.94
3.95–4.24
4.25–4.54
4.55–5.29
5.30–5.73  

3.17–3.40
3.41–3.76
3.77–4.00
4.01–4.68
4.69–5.18  

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70  

5.74–6.35
6.36–7.08
7.09–7.83
7.84–8.47
8.48–9.83  

5.19–5.51
5.52–6.19
6.20–7.12
7.13–8.15
8.16–8.60  

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8  

9.84–10.5
10.6–11.4
11.5–12.8
12.9–13.9
14.0–16.1
16.2–18.0  

8.61–9.21
9.22–10.1
10.2–11.2
11.3–12.0
...
...  

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0
B 25.0  

Following Selections for Size M-1 & M-1P Only.  

...
...
16.2–17.6
17.7–20.6
20.7–23.1
23.2–26.0
...
...  

11.3–12.1
12.2–13.6
13.7–15.3
15.4–17.3
17.4–19.1
19.2–21.7
21.8–24.2
24.3–26.0  

B 19.5
B 22.0
B 25.0
B 28.0
B 32.0
B 36.0
B 40.0
B 45.0  

Following Selections for Size M-1P Only  

23.2–27.1
27.2–29.2
29.3–33.0
33.1–36.0  

...
...
...
...  

B 36.0
B 40.0
B 45.0
B 50.0  

 

Table 2

Motor FLC (A)

Thermal

Unit

 Number

1 T.U.

3 T.U.

0.35–0.38
0.39–0.43
0.44–0.48
0.49–0.56
0.57–0.63  

0.30–0.32
0.33–0.37
0.38–0.39
0.40–0.48
0.49–0.57  

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71  

0.64–0.71
0.72–0.78
0.79–0.88
0.89–0.99
1.00–1.15  

0.58–0.64
0.65–0.70
0.71–0.78
0.79–0.87
0.88–0.98  

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30  

1.16–1.23
1.24–1.43
1.44–1.51
1.52–1.75
1.76–1.93  

0.99–1.13
1.14–1.25
1.26–1.40
1.41–1.58
1.59–1.79  

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40  

1.94–2.25
2.26–2.47
2.48–2.81
2.82–3.20
3.21–3.63  

1.80–1.91
1.92–2.20
2.21–2.55
2.56–2.87
2.88–3.24  

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15  

3.64–4.19
4.20–4.53
4.54–4.89
4.90–5.68
5.69–6.27  

3.25–3.48
3.49–3.85
3.86–4.10
4.11–4.79
4.80–5.31  

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70  

6.28–6.85
6.86–7.73
7.74–8.50
8.51–9.29
9.30–10.4  

5.32–5.65
5.66–6.35
6.36–7.31
7.32–8.34
8.35–8.84  

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8  

10.5–11.3
11.4–12.3
12.4–13.9
14.0–15.0
15.1–18.0  

8.85–9.47
9.48–10.4
10.5–11.5
11.6–12.0
...  

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0  

Following Selections for Size M-1 & M-1P Only.  

...
15.1–17.4
17.5–19.2
19.3–22.0
22.1–24.6  

11.6–12.4
12.5–14.0
14.1–15.8
15.9–17.8
17.9–19.7  

B 19.5
B 22.0
B 25.0
B 28.0
B 32.0  

24.7–26.0
...
...  

19.8–22.4
22.5–25.1
25.1–26.0  

B 36.0
B 40.0
B 45.0  

Following Selections for Size M-1P Only.  

24.7–29.1
29.2–31.7
31.8–36.0  

...
...
...  

B 36.0
B 40.0
B 45.0  

 

[Back to Top]

Table 3

Motor FLC (A)

Thermal

Unit

 Number

1 T.U.

3 T.U.

0.29–0.31
0.32–0.36
0.37–0.39
0.40–0.47
0.48–0.56  

0.28–0.29
0.30–0.33
0.34–0.36
0.37–0.44
0.45–0.52  

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71  

0.57–0.63
0.64–0.69
0.70–0.77
0.78–0.86
0.87–0.97  

0.53–0.59
0.60–0.64
0.65–0.71
0.72–0.80
0.81–0.90  

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30  

0.98–1.12
1.13–1.24
1.25–1.39
1.40–1.57
1.58–1.78  

0.91–1.03
1.04–1.14
1.15–1.27
1.28–1.44
1.45–1.63  

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40  

1.79–1.96
1.97–2.20
2.21–2.41
2.42–2.75
2.76–3.25  

1.64–1.79
1.80–2.01
2.02–2.19
2.20–2.52
2.53–2.95  

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15  

3.26–3.50
3.51–3.87
3.88–4.13
4.14–4.69
4.70–5.20  

2.96–3.17
3.18–3.50
3.51–3.73
3.74–4.22
4.23–4.68  

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70  

5.21–5.53
5.54–6.23
6.24–7.18
7.19–8.20
8.21–8.98  

4.69–4.98
4.99–5.59
5.60–6.43
6.44–7.41
7.42–8.02  

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8  

8.99–9.63
9.64–10.6
10.7–11.8
11.9–12.7
12.8–14.3  

8.03–8.59
8.60–9.52
9.53–10.5
10.6–11.2
11.3–12.0  

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0  

14.4–16.1
16.2–18.0  

...
...  

B 25.0
B 28.0  

Following Selections for Size M-1 & M-1P Only.

...
...
16.2–18.3
18.4–20.2
20.3–23.0  

11.3–12.7
12.8–14.3
14.4–16.1
16.2–17.8
17.9–20.1  

B 22.0
B 25.0
B 28.0
B 32.0
B 36.0  

23.1–26.0
...
...  

20.2–22.6
22.7–25.5
25.6–26.0  

B 40.0
B 45.0
B 50.0  

Following Selections for Size M-1P Only.

25.9–29.0
29.1–30.8
30.9–32.7
32.8–36.0  

...
...
...
...  

B 45.0
B 50.0
B 56.0
B 62.0  

[Back to Top]

Table 4

Motor FLC (A)

Thermal
Unit
Number

1 T.U.

3 T.U.

0.32–0.33
0.34–0.38
0.39–0.41
0.42–0.50
0.51–0.61  

0.29–0.30
0.31–0.35
0.36–0.37
0.38–0.45
0.46–0.54  

B 0.44   

B 0.51
B 0.57
B 0.63
B 0.71  

0.62–0.68
0.69–0.74
0.75–0.83
0.84–0.93
0.94–1.05  

0.55–0.61
0.62–0.66
0.67–0.74
0.75–0.83
0.84–0.93  

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30  

1.06–1.21
1.22–1.34
1.35–1.50
1.51–1.70
1.71–1.93  

0.94–1.07
1.08–1.19
1.20–1.33
1.34–1.51
1.52–1.70  

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40  

1.94–2.12
2.13–2.38
2.39–2.61
2.62–2.99
3.00–3.53  

1.71–1.87
1.88–2.10
2.11–2.29
2.30–2.63
2.64–3.09  

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15  

3.54–3.80
3.81–4.21
4.22–4.49
4.50–5.10
5.11–5.66  

3.10–3.32
3.33–3.67
3.68–3.91
3.92–4.43
4.44–4.91  

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70  

5.67–6.03
6.04–6.79
6.80–7.84
7.85–8.96
8.97–9.82  

4.92–5.23
5.24–5.88
5.89–6.77
6.78–7.90
7.91–8.44  

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8  

9.83–10.4
10.5–11.6
11.7–12.9
13.0–13.9
14.0–15.7
15.8–18.0  

8.45–9.05
9.06–9.99
10.0–11.0
11.1–11.9
12.0–12.0
...  

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0
B 25.0  

Following Selections for Size M-1 & M-1P Only.

...
...
17.8–20.1
20.2–22.2
22.3–25.3
25.4–26.0
...  

12.0–13.4
13.5–15.1
15.2–17.0
17.1–18.9
19.0–21.4
21.5–24.0
24.1–26.0  

B 22.0
B 25.0
B 28.0
B 32.0
B 36.0
B 40.0
B 45.0  

Following Selections for Size  M-1P Only.

25.4–28.4
28.5–33.1
33.2–36.0  

...
...
...  

B 40.0
B 45.0
B 50.0  

 

 

Table 13

Motor FLC (A)

Thermal
Unit
Number

1.T.U.

2 T.U.

3 T.U.

0.29–0.31
0.32–0.34
0.35–0.38
0.39–0.45
0.46–0.54  

0.29–0.31
0.32–0.34
0.35–0.38
0.39–0.45
0.46–0.54  

0.28–0.30
0.31–0.34
0.35–0.37
0.38–0.44
0.45–0.53  

B  0.44
B  0.51
B  0.57
B  0.63
B  0.71  

0.55–0.61
0.62–0.66
0.67–0.73
0.74–0.81
0.82–0.94  

0.55–0.61
0.62–0.66
0.67–0.73
0.74–0.81
0.82–0.94  

0.54–0.59
0.60–0.64
0.65–0.72
0.73–0.80
0.81–0.90  

B  0.81
B  0.92
B  1.03
B  1.16
B  1.30  

0.95–1.05
1.06–1.22
1.23–1.34
1.35–1.51
1.52–1.71  

0.95–1.05
1.06–1.22
1.23–1.34
1.35–1.51
1.52–1.71  

0.91–1.03
1.04–1.14
1.15–1.27
1.28–1.43
1.44–1.62  

B  1.45
B  1.67
B  1.88
B  2.10
B  2.40  

1.72–1.93
1.94–2.14
2.15–2.40
2.41–2.72
2.73–3.15  

1.72–1.93
1.94–2.14
2.15–2.40
2.41–2.72
2.73–3.15  

1.63–1.77
1.78–1.97
1.98–2.32
2.33–2.51
2.52–2.99  

B  2.65
B  3.00
B  3.30
B  3.70
B  4.15  

3.16–3.55
3.56–4.00
4.01–4.40
4.41–4.88
4.89–5.19  

3.16–3.55
3.56–4.00
4.01–4.40
4.41–4.88
4.89–5.19  

3.00–3.42
3.43–3.75
3.76–3.98
3.99–4.48
4.49–4.93  

B  4.85
B  5.50
B  6.25
B  6.90
B  7.70  

5.20–5.73
5.74–6.39
6.40–7.13
7.14–7.90
7.91–8.55  

5.20–5.73
5.74–6.39
6.40–7.13
7.14–7.90
7.91–8.55  

4.94–5.21
5.22–5.84
5.85–6.67
6.68–7.54
7.55–8.14  

B  8.20
B  9.10
B 10.2
B 11.5
B 12.8  

8.56–9.53
9.54–10.6
10.7–11.8
11.9–13.2
13.3–14.9  

8.56–9.53
9.54–10.6
10.7–11.8
11.9–12.0
...  

8.15–8.72
8.73–9.66
9.67–10.5
10.6–11.3
11.4–12.0  

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0  

15.0–16.6
16.7–18.0  

...
...  

...
...  

B 25.0
B 28.0  

Following Selections for Size 1 Only  

...
...
...
16.7–18.9
19.0–21.2  

11.9–13.2
13.3–14.9
15.0–16.6
16.7–18.9
19.0–21.2  

...
11.4–12.7
12.8–14.1
14.2–15.9
16.0–17.5  

B 19.5
B 22.0
B 25.0
B 28.0
B 32.0  

21.3–23.0
23.1–25.5
25.6–26.0
...  

21.3–23.0
23.1–25.5
25.6–26.0
...  

17.6–19.7
19.8–21.9
22.0–24.4
24.5–26.0  

B 36.0
B 40.0
B 45.0
B 50.0  

[Back to Top]

Table 17

Motor FLC (A)

Thermal
Unit
Number

1.T.U.

2 T.U.

3 T.U.

0.42–0.46
0.47–0.50
0.51–0.55
0.56–0.62
0.63–0.67  

0.39–0.43
0.44–0.47
0.48–0.52
0.53–0.58
0.59–0.64  

0.38–0.40
0.41–0.44
0.45–0.49
0.50–0.55
0.56–0.60  

A  .49
A  .54
A  .59
A  .65
A  .71  

0.68–0.73
0.74–0.81
0.82–0.89
0.90–0.98
0.99–1.12  

0.65–0.68
0.69–0.77
0.78–0.84
0.85–0.93
0.94–1.05  

0.61–0.65
0.66–0.72
0.73–0.79
0.80–0.88
0.89–0.98  

A  .78
A  .86
A  .95
A 1.02
A 1.16  

1.13–1.20
1.21–1.34
1.35–1.41
1.42–1.51
1.52–1.62  

1.06–1.13
1.14–1.25
1.26–1.33
1.34–1.42
1.43–1.52  

0.99–1.07
1.08–1.17
1.18–1.25
1.26–1.33
1.34–1.44  

A 1.25
A 1.39
A 1.54
A 1.63
A 1.75  

1.63–1.73
1.74–1.86
1.87–2.02
2.03–2.25
2.26–2.46  

1.53–1.63
1.64–1.75
1.76–1.90
1.91–2.13
2.14–2.33  

1.45–1.53
1.54–1.65
1.66–1.79
1.80–1.99
2.00–2.18  

A 1.86
A 1.99
A 2.15
A 2.31
A 2.57  

2.47–2.77
2.78–2.99
3.00–3.26
3.27–3.59
3.60–3.99  

2.34–2.73
2.74–2.86
2.87–3.14
3.15–3.47
3.48–3.83  

2.19–2.45
2.46–2.65
2.66–2.90
2.91–3.19
3.20–3.56  

A 2.81
A 3.61
A 3.95
A 4.32
A 4.79  

4.00–4.42
4.43–4.61
4.62–5.23
5.24–5.39
5.40–5.88  

3.84–4.16
4.17–4.43
4.44–5.00
5.01–5.16
5.17–5.56  

3.57–3.83
3.84–4.08
4.09–4.64
4.65–5.00
5.01–5.36  

A 5.30
A 5.78
A 6.20
A 6.99
A 7.65  

5.89–6.56
6.57–7.18
7.19–7.80
7.81–9.00  

5.57–6.22
6.23–6.89
6.90–7.00
...  

5.37–5.87
5.88–6.43
6.44–6.79
6.80–7.00  

A 8.38
A 9.25
A 9.85
A 11.0  

 

 

 

 

 

 

 

Table 18

Motor FLC (A)

Thermal
Unit
Number

1.T.U.

2 T.U.

3 T.U.

15.5–16.4
16.5–17.6
17.7–19.1
19.2–20.4
20.5–22.1  

14.4–15.3
15.4–16.4
16.5–18.4
18.5–19.6
19.7–21.0  

13.6–14.5
14.6–15.5
15.6–17.4
17.5–18.5
18.6–19.9  

CC  20.9
CC  22.8
CC  24.6
CC  26.3
CC  28.8  

22.2–23.4
23.5–25.6
25.7–27.3
27.4–29.4
29.5–31.5  

21.1–22.7
22.8–24.2
24.3–25.9
26.0–27.8
27.9–29.8  

20.0–21.5
21.6–22.9
23.0–24.5
24.6–26.3
26.4–28.2  

CC  31.0
CC  33.3
CC  36.4
CC  39.6
CC  42.7  

31.6–33.7
33.8–36.5
36.6–39.1
39.2–41.7
41.8–44.8  

29.9–31.7
31.8–34.2
34.3–36.9
37.0–39.8
39.9–42.3  

28.3–30.0
30.1–32.3
32.4–34.9
35.0–37.6
37.7–40.0  

CC  46.6
CC  50.1
CC  54.5
CC  59.4
CC  64.3  

44.9–48.0
48.1–50.7
50.8–54.9
55.0–59.9
60.0–63.3  

42.4–45.3
45.4–47.9
48.0–51.9
52.0–56.5
56.6–60.7  

40.1–42.8
42.9–45.3
45.4–49.1
49.2–53.4
53.5–57.4  

CC  68.5
CC  74.6
CC  81.5
CC  87.7
CC  94.0  

63.4–67.2
67.3–72.4
72.5–74.9
75.0–77.4
77.5–80.7  

60.8–64.8
64.9–67.1
67.2–70.1
70.2–72.9
73.0–74.9  

57.5–61.3
61.4–63.5
63.6–66.3
66.4–69.0
69.1–70.9  

CC 103.0
CC 112.0
CC 121.0
CC 132.0
CC 143.0  

80.8–83.1
83.2–86.0
...
...  

75.0–77.9
78.0–80.9
81.0–82.9
83.0–86.0  

71.0–73.7
73.8–76.5
76.6–78.4
78.5–86.0  

CC 156.0
CC 167.0
CC 180.0
CC 196.0  

[Back to Top]

Table 49

Motor FLC (A)

Thermal
Unit
Number

82.5–88.2
88.3–95.9
96.0–102.
103.–109.
110.–121.  

DD 112.0
DD 121.0
DD 128.0
DD 140.0
DD 150.0

122.–139.
140.–154.
155.–163.
164.–175.
176.–184.  

DD 160.0
DD 185.0
DD 220.0
DD 240.0
DD 250.0

185.–195.
196.–215.
216.–224.
225.–243.
244.–266.  

DD 265.0
DD 280.0
DD 300.0
DD 320.0
DD 340.0

 

 

 

 

 

 

 

Table 54

Motor FLC (A)

Thermal
Unit
Number

2 T. U.

3 T. U.

43.6–45.5
45.6–49.6
49.7–53.1
53.2–57.6
57.7–62.4  

41.1–43.5
43.6–46.8
46.9–50.0
50.1–54.9
55.0–57.5  

CC 64.3
CC 68.5
CC 74.6
CC 81.5
CC 87.7

62.5–67.5
67.6–71.1
71.2–75.9
76.0–81.9
82.0–84.6  

57.6–61.8
61.9–66.2
66.3–72.4
72.5–78.1
78.2–80.7  

CC 94
CC 103
CC 112
CC 121
CC 132

84.7–90.7
90.8–98.4
98.5–105.
106.–117.
118.–123.  

80.8–86.5
86.6–93.9
94.0–100.
101.–112.
113.–117.  

CC 143
CC 156
CC 167
CC 180
CC 196.

124.–133.
...  

118.–123.
124.–133.  

CC 208
CC 219

 

 

 

 

 

[Back to Top]

Table 56

Motor FLC (A)

Thermal

Unit

 Number

1 or 2 T. U.

3 T. U.

3.29–3.74
3.75–4.23
4.24–4.68
4.69–5.22
5.23–5.67  

3.18–3.40
3.41–3.76
3.77–4.00
4.01–4.57
4.58–5.03  

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70

5.68–6.13
6.14–6.91
6.92–7.70
7.71–8.56
8.57–9.39  

5.04–5.32
5.33–5.97
5.98–6.88
6.89–7.82
7.83–8.47  

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8

9.40–10.4
10.5–11.6
11.7–12.9
13.0–14.6
14.7–16.5  

8.48–9.15
9.16–10.1
10.2–11.2
11.3–12.0
12.1–13.6  

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0

16.6–18.5
18.6–21.0
21.1–23.6
23.7–26.3
26.4–29.3  

13.7–15.2
15.3–17.1
17.2–19.0
19.1–21.5
21.6–24.1  

B 25.0
B 28.0
B 32.0
B 36.0
B 40.0

29.4–35.1
35.2–36.1
36.2–39.1
39.2–41.5
41.6–45.0  

24.2–27.0
27.1–28.7
28.8–30.4
30.5–32.2
32.3–35.4  

B 45.0
B 50.0
B 56.0
B 62.0
B 70.0

...
...  

35.5–38.2
38.3–45.0  

B 79.0
B 88.0

 

 

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