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

46580 Products showing for Fuses & Circuit Breakers

21 / 999+
In Stock
Eaton 15A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 848-2687
  • Mfr. Part No. ABC-15-R
Each
MYR3.82
In Stock
Eaton xPole MCB, 1P, 20A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4320
  • Mfr. Part No. 242207 PLSM-C20-MW
Each
MYR133.79
In Stock
Littelfuse 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 769-0170
  • Mfr. Part No. 03453LF1H
Each
MYR25.20
In Stock
Littelfuse 250A Pink Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4417
  • Mfr. Part No. 0298250.ZXEH
Each
MYR30.26
Temporarily out of stock
Phoenix Contact Industrial Surge Protection, 100kA
  • RS Stock No. 224-9866
  • Mfr. Part No. 2905470
Each
MYR5,831.77
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 768-6134
  • Mfr. Part No. D100997K
Each
MYR73.01
In Stock
Siemens 100A NH Fuse, NH00, 500V ac
  • RS Stock No. 396-095
  • Mfr. Part No. 3NA3830-7
Each (In a Pack of 3)
MYR45.403
Last RS stock
RS PRO SMD Non Resettable Fuse 100mA, 125V
  • RS Stock No. 182-4086P
Each (Supplied in a Box)
MYR4.296
In Stock
Littelfuse 1A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 769-3757
  • Mfr. Part No. 0FLQ001.T
Each
MYR170.45
In Stock
ETI 4A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-824
  • Mfr. Part No. 2311402
Each (In a Pack of 5)
MYR5.696
Temporarily out of stock
Eaton 12A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 261-918
  • Mfr. Part No. LP-CC-12
1 Pack of 10
MYR2,871.33
In Stock
RS PRO 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9816
Each (In a Pack of 10)
MYR2.636
Limited stock
ETI 10A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-846
  • Mfr. Part No. 2311404
Each (In a Pack of 5)
MYR6.216
Temporarily out of stock
Eaton 5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 169-9378
  • Mfr. Part No. TDC11-5A
1 Bag of 1000
MYR8,487.29
In Stock
Better World
Siemens 5SV3 RCCB, 25A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 202-7169
  • Mfr. Part No. 5SV3312-6KL
Each
MYR305.43
In Stock
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 867-4356
  • Mfr. Part No. 3101.0031
Each (In a Pack of 10)
MYR19.345
Temporarily out of stock
Better World
Siemens RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6166
  • Mfr. Part No. 5SU1324-7FP10
Each
MYR1,416.43
In Stock
Littelfuse SMD Non Resettable Fuse 125mA, 125V
  • RS Stock No. 738-2952
  • Mfr. Part No. 0451.125MRL
Each (In a Pack of 10)
MYR8.868
Temporarily out of stock
Siemens SENTRON 3 Phase Busbar, 18mm Pitch
  • RS Stock No. 202-7199
  • Mfr. Part No. 5ST3712
Each
MYR826.18
In Stock
RS PRO MCB, 2P, 16A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0181
Each
MYR106.99
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