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
Fuses - PCB
Fuses - PCB

50687 Products showing for Fuses & Circuit Breakers

37 of 999+
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 200mA, 250V ac
  • RS stock no. 767-5018
Each (In a Pack of 10)
R 8.30(exc. VAT)
In Stock
Better World
ABB, XT4S MCCB 3P 80A, Fixed Mount
  • RS stock no. 236-6744
  • Mfr. Part No. 1SDA068436R1 XT4S 160 MA 80 FF
Each
R 11,500.72(exc. VAT)
Temporarily out of stock
Hager NFN MCB, 4P, 63A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS stock no. 144-4728
  • Mfr. Part No. NFN463
Each
R 8,887.60(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 MCB, 2P, 5A Curve C, 10 kA Breaking Capacity
  • RS stock no. 219-9122
  • Mfr. Part No. M9F22205
Each
R 2,194.72(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 3.15A, 250V
  • RS stock no. 767-5125
Each (In a Pack of 10)
R 12.24(exc. VAT)
In Stock
Schneider Electric Acti9 A9F MCB, 1P, 10A Curve B, 230V AC, 15 kA Breaking Capacity
  • RS stock no. 288-7083
  • Mfr. Part No. A9F93110
Each
R 838.49(exc. VAT)
In Stock
RS PRO Industrial Surge Protector, 5kA, 40 V, DIN Rail Mount
  • RS stock no. 101-766
Each
R 1,704.02(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 4A, Type Z
  • RS stock no. 225-5992
  • Mfr. Part No. 2CDS251001R0338 S201 Z 4A - 10 KA
Each
R 858.85(exc. VAT)
In Stock
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 169-9401
  • Mfr. Part No. S500-2-R
1 Bag of 1000
R 3,623.42(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 40A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3578
  • Mfr. Part No. A9F55340
Each
R 3,132.85(exc. VAT)
Currently unavailable
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 16A Curve B, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-3357
  • Mfr. Part No. A9F76116
Each
R 1,607.43(exc. VAT)
In Stock
ABB RCBO, 10A Current Rating, 4P Poles, 30mA Trip Sensitivity
  • RS stock no. 231-9953
  • Mfr. Part No. 2CSR256040R1104 DS203NC C10 AC30
Each
R 3,878.81(exc. VAT)
In Stock
Panasonic SMD Non Resettable Fuse 500mA, 32V dc
  • RS stock no. 759-4767
  • Mfr. Part No. ERBRE0R50V
Each (In a Pack of 10)
R 5.006(exc. VAT)
In Stock
Wickmann 100A Black Bolt Down Car Fuse, 32V dc
  • RS stock no. 174-0672
  • Mfr. Part No. 0498100.M
Each (In a Pack of 10)
R 42.796(exc. VAT)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 2.5A, 250V ac
  • RS stock no. 769-3264
  • Mfr. Part No. SR-5F-2-5A-BK
Each (In a Pack of 5)
R 15.668(exc. VAT)
In Stock
Eaton 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 848-3832
  • Mfr. Part No. GDC-6-3A
Each
R 151.32(exc. VAT)
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV3P 3 Pole 690V ac Voltage Rating DIN Rail Mount, 73A Current Rating
  • RS stock no. 188-4747
  • Mfr. Part No. GV3P73
Each
R 8,308.04(exc. VAT)
In Stock
ABB System Pro M Compact S200 MCB, 1P, 80A Curve B, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS stock no. 231-9668
  • Mfr. Part No. 2CDS251001R0805 S201-B80 6kA
1 Box of 1
R 1,303.83(exc. VAT)
Temporarily out of stock
Lovato Add-on blocks Phase Barrier for use with GL Series Switch Disconnectors
  • RS stock no. 248-5572
  • Mfr. Part No. GLX902
Each
R 812.71(exc. VAT)
In Stock
Littelfuse 5A Resettable Fuse, 60V
  • RS stock no. 712-7503
  • Mfr. Part No. RKEF500
Each (In a Pack of 10)
R 25.305(exc. VAT)
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