Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

50989 Products showing for Fuses & Circuit Breakers

5 of 999+
In Stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 3P, 20A Curve C, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 336-610
  • Mfr. Part No. SE10C320
Each
€118.92(exc. VAT)
In Stock
ETI 63A D02 Neozed Fuse, E18 Thread Size, gG, 400V ac
  • RS Stock No. 416-023
  • Mfr. Part No. 2212005
Each (In a Pack of 5)
€1.246(exc. VAT)
Temporarily out of stock
Eaton xComfort ECO Distribution Board Enclosure, 12 Way
  • RS Stock No. 257-829
  • Mfr. Part No. 280349 BC-O-2/24-ECO
Each
€91.40(exc. VAT)
Temporarily out of stock
RS PRO 25A Natural Blade Car Fuse, 32V dc
  • RS Stock No. 563-475
Each (In a Pack of 10)
€0.714(exc. VAT)
In Stock
SIBA 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 736-1416
  • Mfr. Part No. 70-172-40/0.5A
Each
€6.17(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 611-0377
Each (In a Pack of 10)
€1.411(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 4A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7652
  • Mfr. Part No. 2CDS251001R0044 S201-C4
Each
€20.31(exc. VAT)
In Stock
Europa EUR1 RCCB, 40A, 4 Pole, 100mA, Type A, 230V ac
  • RS Stock No. 210-4751
  • Mfr. Part No. EUR140.100/4A
Each
€78.51(exc. VAT)
Being discontinued
RS PRO 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-429
Each (In a Pack of 10)
€0.277(exc. VAT)
In Stock
Better World
ABB S200C MCB, 2P, 2A Curve B, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1616
  • Mfr. Part No. 2CDS252280R0025
Each
€50.08(exc. VAT)
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 40A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7609
  • Mfr. Part No. 2CDS253001R0405 S203-B40
Each
€76.23(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 12A Current Rating
  • RS Stock No. 782-7962
  • Mfr. Part No. W58-XB1A4A-12
Each
€8.15(exc. VAT)
In Stock
Schneider Electric, Acti9, 32A, Energy Sensor, 3.5VA, Wireless
  • RS Stock No. 276-8717
  • Mfr. Part No. A9C15907
Each
€200.30(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 10A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3199
  • Mfr. Part No. A9F53210
Each
€58.10(exc. VAT)
Temporarily out of stock
Lovato 32A Fuse Holder for 10 x 38mm Fuse, 3P, 690V ac
  • RS Stock No. 188-1616
  • Mfr. Part No. FB01B3P
Each
€20.28(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 32A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9633
  • Mfr. Part No. 2CDS253001R0321 S203-D32
Each
€77.83(exc. VAT)
In Stock
Littelfuse 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4410
  • Mfr. Part No. 0217002.MXP
Each (In a Pack of 10)
€0.413(exc. VAT)
In Stock
Contactum RCBO, 20A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type B, CCPBR Range
  • RS Stock No. 240-6385
  • Mfr. Part No. CCPBR0620AB
Each
€28.44(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 100A Curve C, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3073
  • Mfr. Part No. A9N18367
Each
€563.32(exc. VAT)
In Stock
Eaton xEffect MCB, 1+N, 20A Curve D
  • RS Stock No. 227-0681
  • Mfr. Part No. 177534 FAZ6-D20/1N
Each
€31.65(exc. VAT)
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