Circuit Breakers

(150638 results)

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.

Part # Manufacturer Description Availability Pricing Quantity
Siemens_5SJ42257HG41

5SJ42257HG41

Circuit Breakers
 Siemens MCB 5SJ4 2P 240V 25A 14K C-TRIP
3
1+: $101.33000
10+: $95.70000
100+: $78.81220
1000+: $73.30000
Siemens_3RV21111KA10

3RV21111KA10

Circuit Breakers
 Siemens MSP S00 AUTO RESET 9-12.5A SCREW
In Stock
1+: $362.85000
Siemens_3RV23110CC10

3RV23110CC10

Circuit Breakers
 Siemens CIRCUIT-BREAKER S00 0.25A NO OVE
In Stock
1+: $183.15000
Siemens_3RV23110EC10

3RV23110EC10

Circuit Breakers
 Siemens CIRCUIT-BREAKER S00 0.4A NO OVER
In Stock
1+: $185.20000
Siemens_3RV21314BA10

3RV21314BA10

Circuit Breakers
 Siemens MSP S2 CLASS 10 14-20A SCREW AUT
In Stock
1+: $427.16000
Siemens_3RV24110HA15

3RV24110HA15

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 0.55-0.8A AUX
In Stock
1+: $251.74000
Siemens_3RV24110HA10

3RV24110HA10

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 0.55-0.8A SCRE
In Stock
1+: $206.47000
Siemens_3RV24114AA20

3RV24114AA20

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 11-16A SPRING
In Stock
1+: $242.14000
Siemens_11HD3BF

11HD3BF

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,.55-.8F
In Stock
-
Siemens_3RV24111AA10

3RV24111AA10

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 1.1-1.6A SCREW
In Stock
1+: $218.81000
Siemens_11HD3B

11HD3B

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,.55-.8F
In Stock
-
Siemens_3RV24214AA20

3RV24214AA20

Circuit Breakers
 Siemens MSP S0 FOR XFRMR 11-16A SPRING
In Stock
1+: $255.96000
Siemens_3RV24214BA20

3RV24214BA20

Circuit Breakers
 Siemens MSP S0 FOR XFRMR 14-20A SPRING
In Stock
1+: $255.96000
Siemens_11XD3BD

11XD3BD

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,14-20FL
In Stock
-
Siemens_11WD3BD

11WD3BD

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,11-16FL
In Stock
-
Siemens_3RV27111BD10

3RV27111BD10

Circuit Breakers
 Siemens TMCB UL489 S00 2A SCREW
In Stock
1+: $419.79000
Siemens_3RV20314TB10

3RV20314TB10

Circuit Breakers
 Siemens MSP S2 CLASS 20 12-17A SCREW
In Stock
1+: $384.34000
10+: $320.28500
Siemens_3RV20314PB15

3RV20314PB15

Circuit Breakers
 Siemens CIRCUIT BREAKER. SCREW-TYPE. 36
In Stock
1+: $540.53000
Siemens_3RV23314RC10

3RV23314RC10

Circuit Breakers
 Siemens CIRCUIT-BREAKER S2 80A SCREW
In Stock
1+: $584.07000
Siemens_115D3B

115D3B

Circuit Breakers
 Siemens SWITCH-MANUALLY OP,3 PH,25AMP,N1
In Stock
-
Siemens_11FD3B

11FD3B

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,.35-.5F
In Stock
-
Siemens_3RV23110JC10

3RV23110JC10

Circuit Breakers
 Siemens CIRCUIT-BREAKER S00 1A NO OVERLO
In Stock
1+: $196.18000
Siemens_3RV24110KA10

3RV24110KA10

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 0.9-1.25A SCRE
In Stock
1+: $218.81000
Siemens_11HD3BG

11HD3BG

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,.55-.8F
In Stock
-
Siemens_11LD3BD

11LD3BD

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,1.1-1.6
In Stock
-
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