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_11AD3BD

11AD3BD

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,.11-.16
In Stock
-
Siemens_3RV20324PA10

3RV20324PA10

Circuit Breakers
 Siemens MSP S2 CLASS 10 28-36A SCREW
In Stock
1+: $508.04000
Siemens_3RV24110BA15

3RV24110BA15

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 0.14-0.2A AUX
In Stock
1+: $251.74000
Siemens_3RV20324TA10

3RV20324TA10

Circuit Breakers
 Siemens MSP S2 CLASS 10 12-17A SCREW
In Stock
1+: $382.23000
Siemens_11PD3BH

11PD3BH

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,2.2-3.2
In Stock
-
Siemens_3RV20110AA40

3RV20110AA40

Circuit Breakers
 Siemens MSP S00 0.11-0.16A RING LUG
In Stock
1+: $174.49000
Siemens_3RV20110HA40

3RV20110HA40

Circuit Breakers
 Siemens MSP S00 0.55-0.8A RING LUG
In Stock
1+: $188.25000
Siemens_11DD3BD

11DD3BD

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,.22-.32
In Stock
-
Siemens_11DD3B

11DD3B

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,.22-.32
In Stock
-
Siemens_3RV20314BB15

3RV20314BB15

Circuit Breakers
 Siemens CIRCUIT BREAKER. SCREW-TYPE. 20
In Stock
1+: $439.61000
Siemens_11WD3BG

11WD3BG

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,11-16FL
In Stock
-
Siemens_11VD3BH

11VD3BH

Circuit Breakers
 Siemens STARTER-MANUALLY OP,3 PH,9-12.5F
In Stock
-
Siemens_3RV24110GA20

3RV24110GA20

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 0.45-0.63A SPR
In Stock
1+: $206.47000
Siemens_3RV24111EA20

3RV24111EA20

Circuit Breakers
 Siemens MSP S00 FOR XFRMR 2.8-4A SPRING
In Stock
1+: $218.81000
Siemens_3RV20111EA250BA0

3RV20111EA250BA0

Circuit Breakers
 Siemens MSP S00 2.8-4A SPRING, -50C RATE
In Stock
1+: $328.57000
Siemens_3RV27111CD10

3RV27111CD10

Circuit Breakers
 Siemens TMCB UL489 S00 2.5A SCREW
In Stock
1+: $419.79000
Siemens_3RV28111BD10

3RV28111BD10

Circuit Breakers
 Siemens TMCB UL489 FOR XFRMR S00 2A SCRE
In Stock
1+: $452.72000
Siemens_3RV20111HA40

3RV20111HA40

Circuit Breakers
 Siemens MSP S00 5.5-8A RING LUG
In Stock
1+: $197.54000
Siemens_3RV20214BA25

3RV20214BA25

Circuit Breakers
 Siemens MSP S0 14-20A AUX 1NO 1NC SPRING
In Stock
1+: $288.39000
Siemens_3RV20214CA100BA0

3RV20214CA100BA0

Circuit Breakers
 Siemens SPECIAL TYPE CIRCUIT-BREAKER 22A
In Stock
1+: $343.58000
Siemens_3RV20110FA25

3RV20110FA25

Circuit Breakers
 Siemens MSP S00 0.35-0.5A AUX 1NO 1NC SP
In Stock
1+: $210.58000
Siemens_3RV20110EA40

3RV20110EA40

Circuit Breakers
 Siemens MSP S00 0.28-0.4A RING LUG
In Stock
1+: $175.22000
Siemens_3RV20210JA15

3RV20210JA15

Circuit Breakers
 Siemens MSP S0 0.7-1A SCRW W/AUX 1NO/1NC
In Stock
1+: $231.12000
Siemens_3RV28111JD10

3RV28111JD10

Circuit Breakers
 Siemens TMCB UL489 FOR XFRMR S00 10A SCR
In Stock
1+: $495.24000
Siemens_5SJ42357HG41

5SJ42357HG41

Circuit Breakers
 Siemens MCB 5SJ4 2P 240V 35A 14K C-TRIP
In Stock
1+: $121.57000
Follow Us
Please find more information about us from below social media and interact with us!
ErsaErsaErsaErsa
Information
About Contact Certification Product Index All Manufacturers Blog
Policies
Shipping & Delivering Refund & Return Terms of Condition Privacy Policy
Tools
RFQ BOM PCB
ERSA LIMITED
[email protected] TEL.:+65 (3) 1252045
260B ANG MO KIO STREET 21 #18-153 KEBUN BARU COURT SINGAPORE
FLAT/RM A7/F KIMLEY COMMERCIAL BUILDING 142-146 QUEEN'S ROAD CENTRAL HK
ISO9001Quality PolicyISO45001ISO14001paypalvisaamexooFedEXDHLUPSTNTOthers

©2025 ERSA Electronics Corporation.