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

51028 Products showing for Fuses & Circuit Breakers

21 of 999+
Eaton 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1458
  • Mfr. Part No. S505-1-R
1 Pack of 10
£2.27(exc. VAT)
Eaton 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 489-4506
  • Mfr. Part No. C10M20
Each (In a Pack of 10)
£1.287(exc. VAT)
Siemens Sentron 5SY6 MCB, 2P, 4A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3627
  • Mfr. Part No. 5SY62047
Each
£43.11(exc. VAT)
Littelfuse 210A Base Mount Fuse Holder for ATO Fuse
  • RS Stock No. 894-9622
  • Mfr. Part No. PDM61001ZXM
Each
£22.70(exc. VAT)
Littelfuse 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4347A
  • Mfr. Part No. 0217.500MXP
Each (In a Pack of 100)
£0.09(exc. VAT)
Europa EUC2P EUC MCB, 2P, 16A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6541
  • Mfr. Part No. EUC2P16C
Each
£15.36(exc. VAT)
Better World
Siemens Sentron 5SY4 MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 622-0036
  • Mfr. Part No. 5SY4104-7
Each
£21.12(exc. VAT)
Selco Thermal Fuse +216°C 10 A, 250V ac
  • RS Stock No. 111-7811
  • Mfr. Part No. SWTC-421-3535
Each (In a Pack of 10)
£1.646(exc. VAT)
Littelfuse 100A Yellow Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4397
  • Mfr. Part No. 0298100.ZXEH
Each
£4.94(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 32A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3170
  • Mfr. Part No. A9F53132
Each
£25.48(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 25A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3394
  • Mfr. Part No. A9F54325
Each
£108.27(exc. VAT)
RS PRO 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-605
Each (In a Pack of 10)
£0.286(exc. VAT)
Littelfuse 125A Grey, White Fuse Strips Car Fuse, 80V dc
  • RS Stock No. 226-0850
  • Mfr. Part No. 157.5701.6121
Each
£7.33(exc. VAT)
ABB PS3 3 Phase Busbar, 400V
  • RS Stock No. 231-9645
  • Mfr. Part No. 2CDL230489R1606 PS3/6/16BP
1 Box of 1
£15.75(exc. VAT)
Spelsberg Consumer Unit Ake 05
  • RS Stock No. 475-1336
  • Mfr. Part No. 73550501
Each
£43.52(exc. VAT)
Better World
ABB System Pro M Compact S200M MCB, 2P, 4A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 131-983
  • Mfr. Part No. 2CDS272001R0044 S202M-C4
Each
£59.31(exc. VAT)
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
£282.97(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 32A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3237
  • Mfr. Part No. A9F53332
Each
£108.27(exc. VAT)
Schurter SMD Non Resettable Fuse 4A, 125 V dc, 250V ac
  • RS Stock No. 736-0762
  • Mfr. Part No. 3403.0172.24
Each (In a Pack of 10)
£0.575(exc. VAT)
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type A, Acti 9 Range
  • RS Stock No. 790-9204
  • Mfr. Part No. A9D31816
Each
£148.47(exc. VAT)
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RCBOs Guide
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Fuses Guide
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Distribution Boards Guide
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MCBs Guide
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