20 A Circuit Breaker 101
| Part | RoHS | Manufacturer | Circuit Protection Type | Mounting Feature | Rated AC Voltage | Rated DC Voltage | Rated Current | Terminal Shape | Minimum Operating Temperature | Terminal Finish | Rated Breaking Capacity | Manufacturer Series | Trip Time/Delay | Additional Features | Actuator Type | Packing Method | Body Length/Diameter | Body Width | Environmental Characteristics | JESD-609 Code | Dimensions | Circuit Function | Body Height | Reference Standard | No. of Poles | Maximum Operating Temperature | Blow Characteristic |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Panel Mount |
12 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
150 A |
Reset Button |
0.524 in (13.3 mm) |
0.276 in (7 mm) |
Corrosion Resistant; IP00; IP40 |
Trip |
0.984 in (25 mm) |
1 |
85 °C (185 °F) |
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|
Schneider Electric Sa |
Thermal Magnetic Circuit Breaker |
DIN Rail Mount |
440 V |
20 A |
Snap On |
-25 °C (-13 °F) |
10 kA |
Rated breaking capacity at 250 VDC: 50000 A |
Toggle |
2.874 in (73 mm) |
2.835 in (72 mm) |
Environment/Moisture Resistant |
2.874 x 2.835 x 3.189 in (73 x 72 x 81 mm) |
Trip |
3.189 in (81 mm) |
EN; IEC |
4 |
60 °C (140 °F) |
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|
TE Connectivity |
Magnetic Circuit Breaker |
Panel Mount |
277 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
5 kA |
2.2 s |
Toggle |
2 in (50.8 mm) |
0.75 in (19.05 mm) |
Fungus Resistant; Moisture Resistant |
2 x 0.75 x 1.64 in (50.8 x 19.05 x 41.66 mm) |
Series Trip |
1.64 in (41.66 mm) |
CSA; UL |
1 |
85 °C (185 °F) |
Standard |
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|
TE Connectivity |
Magnetic Circuit Breaker |
Panel Mount |
20 A |
Quick Connect |
2.2 s |
Toggle |
Series Trip |
1 |
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|
|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
50 V |
20 A |
Quick Connect |
1 kA |
6 s |
Rated breaking capacity at 50 VDC: 2000 A |
Push To Reset |
1.375 x 0.66 x 1.375 in (34.93 x 16.76 x 34.93 mm) |
Series Trip |
1 |
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|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
32 V |
20 A |
Quick Connect |
1 kA |
2.2 s |
Push To Reset |
0.625 in (15.88 mm) |
0.54 in (13.72 mm) |
0.625 x 0.54 x 1.535 in (15.88 x 13.72 x 38.99 mm) |
Series Trip |
1.535 in (38.99 mm) |
CSA; SEV; UL; VDE |
1 |
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|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
32 V |
20 A |
Quick Connect |
2.2 s |
Push To Reset |
Series Trip |
1 |
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|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
32 V |
20 A |
Quick Connect |
2.2 s |
Push To Reset |
Series Trip |
1 |
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|
|
TE Connectivity |
Magnetic Circuit Breaker |
Panel Mount |
277 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
5 kA |
2.2 s |
Toggle |
2 in (50.8 mm) |
1.5 in (38.1 mm) |
Fungus Resistant; Moisture Resistant |
2 x 1.5 x 1.64 in (50.8 x 38.1 x 41.66 mm) |
Series Trip |
1.64 in (41.66 mm) |
CSA; UL |
2 |
85 °C (185 °F) |
Standard |
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|
Defense Logistics Agency |
Thermal Circuit Breaker |
Panel Mount |
120 V |
28 V |
20 A |
Screw |
-55 °C (-67 °F) |
2 kA |
Rated breaking capacity at 28 VDC: 6000 A |
Push-Pull |
0.781 in (19.84 mm) |
0.593 in (15.06 mm) |
Corrosion Resistant; Moisture Resistant |
0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm) |
Trip Free |
1.03 in (26.16 mm) |
MIL-C-5809 |
1 |
121 °C (249.8 °F) |
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|
Texas Instruments |
Thermal Circuit Breaker |
Panel Mount |
120 V |
28 V |
20 A |
Screw |
2 kA |
2TC2 |
Push-Pull |
0.781 in (19.84 mm) |
0.593 in (15.06 mm) |
Corrosion Resistant |
0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm) |
1.03 in (26.16 mm) |
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|
Eaton Corporation |
Thermal Circuit Breaker |
Panel Mount |
120 V |
28 V |
20 A |
Screw |
-55 °C (-67 °F) |
3.5 kA |
Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A |
Push Button |
0.781 in (19.84 mm) |
0.593 in (15.06 mm) |
Corrosion Resistant; Moisture Resistant |
0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm) |
Trip |
1.03 in (26.16 mm) |
1 |
121 °C (249.8 °F) |
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|
|
Schurter Ag |
Thermal Circuit Breaker |
Panel Mount |
240 V |
60 V |
20 A |
Quick Connect |
-30 °C (-22 °F) |
2 kA |
Rocker |
Bulk |
1.417 in (36 mm) |
1.142 in (29 mm) |
IP40 |
Trip Free |
1.736 in (44.1 mm) |
CCC; CSA; GB; IEC; UL; VDE |
2 |
60 °C (140 °F) |
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|
|
Schurter Ag |
Thermal Circuit Breaker |
Panel Mount |
240 V |
60 V |
20 A |
Quick Connect |
-30 °C (-22 °F) |
2 kA |
Rocker |
Bulk |
1.417 in (36 mm) |
1.142 in (29 mm) |
IP40 |
Trip Free |
1.736 in (44.1 mm) |
CCC; CSA; GB; IEC; UL; VDE |
2 |
60 °C (140 °F) |
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|
|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Panel Mount |
240 V |
50 V |
20 A |
Quick Connect |
-30 °C (-22 °F) |
5 kA |
Rated breaking capacity at 50 VDC: 1000 A |
Rocker |
Corrosion/Moisture Resistant; IP00; IP40 |
Manual On/Off |
CCC; CE; CSA; CQC; KTL; UL; VDE |
2 |
60 °C (140 °F) |
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|
|
Carling Technologies |
Magnetic Circuit Breaker |
Panel Mount |
277 V |
80 V |
20 A |
Screw |
-40 °C (-40 °F) |
5 kA |
Standards: MIL-PRF-55629, MIL-STD-202 |
Handle |
2 in (50.8 mm) |
0.755 in (19.18 mm) |
Corrosion/Moisture Resistant |
Series Trip |
1.64 in (41.66 mm) |
CSA; UL |
1 |
85 °C (185 °F) |
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|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Panel Mount |
12 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
150 A |
Modified Reset |
0.524 in (13.3 mm) |
0.276 in (7 mm) |
Corrosion Resistant; IP00; IP50 |
Trip |
0.984 in (25 mm) |
1 |
85 °C (185 °F) |
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|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Inline/Holder |
32 V |
20 A |
Tab/Blade |
-40 °C (-40 °F) |
150 A |
Push To Reset |
0.787 in (20 mm) |
0.236 in (6 mm) |
Corrosion Resistant; IP00; IP30; IP54 |
Trip Free |
0.945 in (24 mm) |
UL |
1 |
85 °C (185 °F) |
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|
Altech |
Thermal Magnetic Circuit Breaker |
DIN Rail Mount |
277 V |
80 V |
20 A |
Screw And Snap On |
-25 °C (-13 °F) |
10 kA |
Handle |
Bulk |
3.516 in (89.3 mm) |
1.378 in (35 mm) |
IP20 |
Under Voltage Release |
2.693 in (68.4 mm) |
CSA; UL; VDE |
2 |
55 °C (131 °F) |
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|
|
Carling Technologies |
Magnetic Circuit Breaker |
Panel Mount |
80 V |
20 A |
Screw |
-40 °C (-40 °F) |
3 kA |
Standards: MIL-PRF-55629, MIL-STD-202 |
Rocker |
2.156 in (54.76 mm) |
0.745 in (18.92 mm) |
Corrosion/Moisture Resistant |
Series Trip |
1.64 in (41.66 mm) |
CSA; UL; VDE |
1 |
85 °C (185 °F) |
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|
|
Eaton Corporation |
Thermal Magnetic Circuit Breaker |
DIN Rail Mount |
480 V |
96 V |
20 A |
Snap On |
-40 °C (-40 °F) |
5 kA |
Toggle |
3.15 in (80 mm) |
2.091 in (53.1 mm) |
IP20 |
Trip Free |
2.362 in (60 mm) |
CSA; UL |
3 |
167 °C (332.6 °F) |
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|
|
Siemens |
Thermal Magnetic Circuit Breaker |
DIN Rail Mount |
690 V |
20 A |
Screw And Snap On |
-20 °C (-4 °F) |
2 kA |
3RV2021-4BA10 |
3.819 in (97 mm) |
1.772 in (45 mm) |
Moisture Resistant; IP20 |
3.819 x 1.772 x 3.815 in (97 x 45 x 96.9 mm) |
3.815 in (96.9 mm) |
CCC; CSA; EAC; KTL; UL |
3 |
60 °C (140 °F) |
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|
|
Siemens |
Thermal Magnetic Circuit Breaker |
DIN Rail Mount |
690 V |
20 A |
Screw And Snap On |
-20 °C (-4 °F) |
2 kA |
Rotary Handle |
5.669 in (144 mm) |
1.772 in (45 mm) |
IP00; IP20 |
5.669 x 1.772 x 3.819 in (144 x 45 x 97 mm) |
Trip |
3.819 in (97 mm) |
3 |
60 °C (140 °F) |
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|
|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
50 V |
20 A |
Quick Connect |
1 kA |
3 s |
Rocker |
1.89 in (48.01 mm) |
0.98 in (24.89 mm) |
Series Trip |
1.724 in (43.79 mm) |
2 |
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|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
50 V |
20 A |
Quick Connect |
1 kA |
3 s |
Rocker |
1.89 in (48.01 mm) |
0.98 in (24.89 mm) |
Series Trip |
1.724 in (43.79 mm) |
2 |
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|
Carling Technologies |
Magnetic Circuit Breaker |
Panel Mount |
120 V |
20 A |
Stud |
-40 °C (-40 °F) |
10 kA |
Handle |
2.5 in (63.5 mm) |
1.515 in (38.48 mm) |
Corrosion/Moisture Resistant |
Series Trip |
1.85 in (47 mm) |
CSA; UL |
2 |
85 °C (185 °F) |
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|
|
TE Connectivity |
Magnetic Circuit Breaker |
Panel Mount |
277 V |
20 A |
Stud |
-40 °C (-40 °F) |
5 kA |
2.2 s |
Toggle |
2.5 in (63.5 mm) |
0.75 in (19.05 mm) |
Series Trip |
1.845 in (46.86 mm) |
1 |
85 °C (185 °F) |
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|
TE Connectivity |
Magnetic Circuit Breaker |
Panel Mount |
277 V |
20 A |
Stud |
-40 °C (-40 °F) |
5 kA |
2.2 s |
Toggle |
2.5 in (63.5 mm) |
0.75 in (19.05 mm) |
Series Trip |
1.845 in (46.86 mm) |
1 |
85 °C (185 °F) |
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|
|
Siemens |
Thermal Magnetic Circuit Breaker |
DIN Rail Mount |
690 V |
20 A |
Screw And Snap On |
-20 °C (-4 °F) |
2 kA |
Rotary Handle |
5.669 in (144 mm) |
1.772 in (45 mm) |
IP00; IP20 |
5.669 x 1.772 x 3.819 in (144 x 45 x 97 mm) |
Trip |
3.819 in (97 mm) |
3 |
60 °C (140 °F) |
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|
|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
50 V |
20 A |
Quick Connect |
1 kA |
6 s |
Push To Reset |
1.375 in (34.93 mm) |
0.66 in (16.76 mm) |
Series Trip |
1.375 in (34.93 mm) |
1 |
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|
|
TE Connectivity |
Magnetic Circuit Breaker |
Panel Mount |
277 V |
20 A |
Stud |
-40 °C (-40 °F) |
5 kA |
2.2 s |
Toggle |
2.5 in (63.5 mm) |
1.5 in (38.1 mm) |
Series Trip |
1.845 in (46.86 mm) |
2 |
85 °C (185 °F) |
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|
|
Sensata Technologies |
Magnetic Circuit Breaker |
Panel Mount |
240 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
2 kA |
Toggle Handle |
2 in (50.8 mm) |
1.515 in (38.48 mm) |
Corrosion/Moisture Resistant |
Trip Free |
1.687 in (42.85 mm) |
VDE |
2 |
85 °C (185 °F) |
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|
Carling Technologies |
Magnetic Circuit Breaker |
Panel Mount |
277 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
1.5 kA |
Toggle Handle |
2 in (50.8 mm) |
2.265 in (57.53 mm) |
Corrosion/Moisture Resistant |
Series Trip |
1.73 in (43.94 mm) |
CSA; UL; VDE |
3 |
85 °C (185 °F) |
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|
|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Panel Mount |
250 V |
50 V |
20 A |
Quick Connect |
-30 °C (-22 °F) |
20 A |
Rocker |
2.126 in (54 mm) |
0.827 in (21 mm) |
Corrosion Resistant |
2.126 x 0.827 x 1.299 in (54 x 21 x 33 mm) |
Manual On/Off |
1.299 in (33 mm) |
CCC; CSA; UL; VDE |
2 |
60 °C (140 °F) |
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|
Carling Technologies |
Magnetic Circuit Breaker |
Panel Mount |
480 V |
150 V |
20 A |
Stud |
-40 °C (-40 °F) |
10 kA |
Handle |
1.85 in (47 mm) |
2.265 in (57.53 mm) |
Series Trip |
2.5 in (63.5 mm) |
UL |
3 |
85 °C (185 °F) |
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|
|
Sensata Technologies |
Magnetic Circuit Breaker |
Panel Mount |
240 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
2 kA |
Toggle |
2 in (50.8 mm) |
0.75 in (19.05 mm) |
Corrosion/Moisture Resistant |
Trip Free |
1.687 in (42.85 mm) |
CCC; VDE |
1 |
85 °C (185 °F) |
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|
Sensata Technologies |
Magnetic Circuit Breaker |
Panel Mount |
240 V |
20 A |
Screw |
-40 °C (-40 °F) |
1 kA |
Toggle |
1.562 in (39.67 mm) |
1.281 in (32.53 mm) |
Corrosion Resistant; Sealed |
Series Trip |
1.78 in (45.21 mm) |
2 |
100 °C (212 °F) |
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|
|
Sensata Technologies |
Magnetic Circuit Breaker |
Panel Mount |
240 V |
80 V |
20 A |
Quick Connect |
-40 °C (-40 °F) |
2 kA |
Toggle Handle |
2 in (50.8 mm) |
1.515 in (38.48 mm) |
Corrosion/Moisture Resistant |
Trip Free |
1.687 in (42.85 mm) |
CCC; VDE |
2 |
85 °C (185 °F) |
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|
|
Siemens |
Thermal Circuit Breaker |
Panel Mount |
600 V |
250 V |
20 A |
Screw |
-25 °C (-13 °F) |
65 kA |
Toggle |
5.5 in (139.7 mm) |
2 in (50.8 mm) |
IP40 |
5.5 x 2 x 3 in (139.7 x 50.8 x 76.2 mm) |
Trip |
3 in (76.2 mm) |
2 |
70 °C (158 °F) |
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|
|
Siemens |
Equipment Leakage Circuit Breaker |
DIN Rail Mount |
230 V |
20 A |
Screw And Snap On |
10 kA |
Handle |
3.543 in (90 mm) |
1.417 in (36 mm) |
IP20 |
3.543 x 1.417 x 3.031 in (90 x 36 x 77 mm) |
Trip |
3.031 in (77 mm) |
2 |
70 °C (158 °F) |
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|
|
TE Connectivity |
Thermal Circuit Breaker |
Panel Mount |
250 V |
32 V |
20 A |
Quick Connect |
1 kA |
2.2 s |
Push To Reset |
0.76 in (19.31 mm) |
0.76 in (19.31 mm) |
Series Trip |
1.535 in (38.99 mm) |
1 |
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|
|
Carling Technologies |
Magnetic Circuit Breaker |
Panel Mount |
500 V |
20 A |
Screw |
-40 °C (-40 °F) |
10 kA |
Handle |
3.672 in (93.26 mm) |
1.515 in (38.48 mm) |
Corrosion/Moisture Resistant |
Series Trip |
2.264 in (57.51 mm) |
UL |
2 |
85 °C (185 °F) |
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|
|
Altech |
Magnetic Circuit Breaker |
DIN Rail Mount |
240 V |
20 A |
Snap On |
10 kA |
Toggle |
4.134 in (105 mm) |
1.378 in (35 mm) |
Trip |
2.362 in (60 mm) |
CUL; UL |
1 |
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|
Eaton Corporation |
Thermal Circuit Breaker |
Panel Mount-Threaded |
120 V |
28 V |
20 A |
Screw |
500 A |
Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 2000 A |
0.78 in (19.81 mm) |
0.593 in (15.06 mm) |
0.78 x 0.593 x 1.251 in (19.81 x 15.06 x 31.78 mm) |
1.251 in (31.78 mm) |
MS |
1 |
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|
Eaton Corporation |
Equipment Leakage Circuit Breaker |
DIN Rail Mount |
240 V |
20 A |
Snap On |
10 kA |
Toggle |
Trip |
CSA; UL |
1 |
40 °C (104 °F) |
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|
|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Inline/Holder |
240 V |
28 V |
20 A |
Tab/Blade |
-20 °C (-4 °F) |
200 A |
Manual Reset |
1.26 in (32 mm) |
0.551 in (14 mm) |
Trip Free |
1.563 in (39.7 mm) |
CSA; CUL; UL; VDE |
1 |
60 °C (140 °F) |
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|
|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Panel Mount |
240 V |
50 V |
20 A |
Quick Connect |
-30 °C (-22 °F) |
5 kA |
Rated breaking capacity at 50 VDC: 1000 A |
Rocker |
2.22 in (56.4 mm) |
0.984 in (25 mm) |
Corrosion Resistant; IP00; IP40 |
Trip Free |
1.299 in (33 mm) |
CCC; CSA; KC; UL; VDE |
1 |
60 °C (140 °F) |
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|
|
E-t-a Elektrotechnische Apparate |
Thermal Circuit Breaker |
Panel Mount |
115 V |
20 A |
Quick Connect |
-30 °C (-22 °F) |
5 kA |
Rated breaking capacity at 50 VDC: 1000 A |
Rocker |
Corrosion Resistant; IP00; IP40 |
Manual On/Off |
CCC; CE; CSA; CQC; KTL; UKCA; UL; VDE |
2 |
60 °C (140 °F) |
A circuit breaker is an automatic electrical switch that is designed to protect an electrical circuit from damage caused by overcurrent or short circuits. Circuit breakers are commonly used in residential, commercial, and industrial electrical systems, and they are an important safety device that helps prevent electrical fires, equipment damage, and personal injury.
Circuit breakers work by monitoring the amount of current flowing through an electrical circuit. If the current exceeds a preset level, the circuit breaker will trip, or open the circuit, to prevent damage to the electrical system. When the circuit breaker trips, it interrupts the flow of current, which stops the electrical current from flowing and prevents further damage.
Circuit breakers are available in a variety of types and sizes, and they can be classified based on their voltage rating, current rating, and interrupting capacity. Some common types of circuit breakers include thermal circuit breakers, magnetic circuit breakers, and hybrid circuit breakers.
In addition to protecting electrical systems from overcurrent and short circuits, circuit breakers also help improve the reliability and efficiency of electrical systems. They can also be used to switch electrical circuits on and off, which can be helpful in certain applications.