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

35 of 999+
In Stock
Better World
ABB System Pro M Compact S200M MCB, 1P, 16A Curve K, 253V AC, 72V DC, 25 kA Breaking Capacity
  • RS stock no. 231-9697
  • Mfr. Part No. 2CDS271001R0467 S201M K 16A - 15 KA
1 Box of 1
R 700.18(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W51 Single Pole 250V ac Voltage Rating, 10A Current Rating
  • RS stock no. 782-8044
  • Mfr. Part No. W51-A122B1-10
Each
R 151.58(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 80A Curve D, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS stock no. 776-3082
  • Mfr. Part No. A9N18387
Each
R 6,706.97(exc. VAT)
In Stock
Littelfuse 15A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4599
  • Mfr. Part No. 0218015.MXP
Each (In a Pack of 10)
R 31.50(exc. VAT)
In Stock
Wickmann 60A Bolt Down Car Fuse, 32V dc
  • RS stock no. 174-0663
  • Mfr. Part No. 0298060.ZXB
1 Pack of 1
R 183.67(exc. VAT)
In Stock
Eaton 5A T Glass Cartridge Fuse, 6.35 x 31.75mm
  • RS stock no. 852-7156
  • Mfr. Part No. MDL-5-R
Each
R 17.80(exc. VAT)
In Stock
Europa 3 Phase Distribution Board, 18 Way, 125 A
  • RS stock no. 849-6415
  • Mfr. Part No. TPN06
Each
R 9,240.48(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 16A Curve B, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 231-9671
  • Mfr. Part No. 2CDS251001R1165 S201 B 16A - 10 KA
1 Box of 1
R 433.02(exc. VAT)
In Stock
Allen Bradley 1492 1492-SPM MCB, 2P, 6A Curve B, 277V AC, 96V DC, 10 kA Breaking Capacity
  • RS stock no. 125-1432
  • Mfr. Part No. 1492-SPM2B060
Each
R 989.12(exc. VAT)
In Stock
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 2.5A Current Rating
  • RS stock no. 284-5827
  • Mfr. Part No. 4400.0009
Each
R 215.35(exc. VAT)
Temporarily out of stock
Allen Bradley 1492-SP 1492-SPM MCB, 1P, 16A Curve C
  • RS stock no. 218-8744
  • Mfr. Part No. 1492-SPM1C160-N
Each
R 1,062.78(exc. VAT)
In Stock
Littelfuse 5A T Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 876-8442
  • Mfr. Part No. KLDR005.TXP
Each
R 922.47(exc. VAT)
In Stock
Schurter Thermal Circuit Breaker - T12 Single Pole 240V ac Voltage Rating, 10A Current Rating
  • RS stock no. 284-6101
  • Mfr. Part No. 4410.0106
Each
R 466.86(exc. VAT)
In Stock
Littelfuse 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-2981
  • Mfr. Part No. 0213005.MXP
Each (In a Pack of 10)
R 21.599(exc. VAT)
In Stock
Littelfuse 10A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-3120
  • Mfr. Part No. 0217010.MXP
Each (In a Pack of 10)
R 8.425(exc. VAT)
In Stock
Eaton 125A Bolted Tag Fuse, 18 x 56mm, 150 V dc, 240 V ac, 41mm
  • RS stock no. 182-1771
  • Mfr. Part No. 125LET
Each
R 469.61(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 1P, 6A Curve C, 15 kA Breaking Capacity
  • RS stock no. 219-9264
  • Mfr. Part No. A9F94106
Each
R 2,159.05(exc. VAT)
In Stock
Littelfuse 500mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4230
  • Mfr. Part No. 0218.500MXP
Each (In a Pack of 10)
R 23.252(exc. VAT)
Temporarily out of stock
Hager NFN MCB, 2P, 4A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS stock no. 144-4710
  • Mfr. Part No. NFN204
Each
R 2,604.72(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 50A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3401
  • Mfr. Part No. A9F54350
Each
R 3,402.89(exc. VAT)
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