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

46604 Products showing for Fuses & Circuit Breakers

10 / 999+
Siemens 4A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-0913
  • Mfr. Part No. 5SE2304
Each (In a Pack of 10)
MYR10.605
Littelfuse 1.6A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8041
  • Mfr. Part No. 021601.6MXP
Each (In a Bag of 10)
MYR5.911
Littelfuse 160A Grey, White Fuse Strips Car Fuse, 48V dc
  • RS Stock No. 226-0917
  • Mfr. Part No. 157.5701.6161
Each
MYR43.72
Eaton Bussmann Series PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 769-3218
  • Mfr. Part No. SR-5-2A-BK
Each (In a Pack of 10)
MYR4.437
Phoenix Contact EC-E Electronic Circuit Breaker 8A 24V EC-E, 1 channels , DIN Rail
  • RS Stock No. 131-311
  • Mfr. Part No. 0903047
Each (In a Pack of 6)
MYR397.152
ABB RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 183-3708
  • Mfr. Part No. 2CSR245441R1164/471033
Each
MYR956.20
Schurter PC Board Non Resettable Fuse, Radial 315mA, 250V ac
  • RS Stock No. 284-5057
  • Mfr. Part No. 0034.6009
Each (In a Pack of 10)
MYR3.037
Allen Bradley 30 V dc, 50 V dc, 230V ac Auxiliary Release Circuit Trip for use with 1492-D DC Circuit Breaker, 188
  • RS Stock No. 125-1545
  • Mfr. Part No. 189-AR11
Each
MYR346.62
RS PRO 10A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-520
Each (In a Pack of 10)
MYR2.016
RS PRO PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 767-5216
Each (In a Pack of 10)
MYR2.082
RS PRO 10A Slotted Tag Fuse, A1, 250 V dc, 415V ac, 44.5mm
  • RS Stock No. 221-3692
1 Bag of 5
MYR108.03
Littelfuse 1.35A Resettable Fuse, 30V dc
  • RS Stock No. 517-6786
  • Mfr. Part No. RUEF135
Each (In a Pack of 10)
MYR1.426
Eaton MEMShield MCB, 1P, 40A Curve C, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3039
  • Mfr. Part No. EMCH140 EMCH140
Each
MYR167.19
SIBA 125A NH Fuse, NH00, 500V ac
  • RS Stock No. 421-592
  • Mfr. Part No. 20-001-04/125A
Each
MYR169.00
Siemens 80A NH Fuse, NH00, 500V ac
  • RS Stock No. 397-420
  • Mfr. Part No. 3NA6824-7
Each (In a Pack of 3)
MYR41.557
Omron Busbar
  • RS Stock No. 329-7320
  • Mfr. Part No. G78-16-P2RF-E
Each
MYR52.41
Legrand DX3 RCD, 25A, 1+N Pole, 30mA, Type AC
  • RS Stock No. 732-0023
  • Mfr. Part No. 4 115 04
Each
MYR706.13
RS PRO 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5979
Each (In a Pack of 10)
MYR1.696
Better World
ABB, XT4L MCCB 4P 250A, Fixed Mount
  • RS Stock No. 236-6840
  • Mfr. Part No. 1SDA068590R1 XT4L 250 Ekip LSIG 250A FF
Each
MYR19,754.08
Littelfuse 800mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3732
  • Mfr. Part No. 0218.800MXP
Each (In a Pack of 10)
MYR3.314
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