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

46580 Products showing for Fuses & Circuit Breakers

40 / 999+
Last RS stock
Phoenix Contact Thermal Circuit Breaker - TCP 8A Single Pole 65 V dc, 250V ac Voltage Rating, 8A Current Rating
  • RS Stock No. 801-6911
  • Mfr. Part No. 0712291
Each
MYR82.25
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 4A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3376
  • Mfr. Part No. A9F54304
Each
MYR1,016.33
In Stock
Schurter 15A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 712-4778
  • Mfr. Part No. 0090.0015
Each
MYR114.00
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 63A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3580
  • Mfr. Part No. A9F55363
Each
MYR1,181.87
In Stock
Eaton 6A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 413-282
  • Mfr. Part No. NITD6
Each (In a Pack of 5)
MYR25.28
In Stock
Mersen 25A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0614
  • Mfr. Part No. F1014581 / FR10GR69V25
Each
MYR44.50
In Stock
Socomec 4A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 122-5263
  • Mfr. Part No. 60120004
Each (In a Pack of 10)
MYR5.86
In Stock
Eaton 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3034
  • Mfr. Part No. GMA-500-R
Each
MYR3.75
In Stock
RS PRO 2.5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-564
Each (In a Pack of 10)
MYR1.457
In Stock
Eaton 32A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8639
  • Mfr. Part No. 32NHG000B
Each
MYR34.98
In Stock
Better World
RS PRO 10A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 239-4973
Each (In a Pack of 10)
MYR29.692
Temporarily out of stock
Eaton 16A NH Fuse, NH000, 690V ac
  • RS Stock No. 181-8463
  • Mfr. Part No. 16NHM000B-690
1 Box of 3
MYR121.33
In Stock
Staubli 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 564-645
  • Mfr. Part No. 69.0012
Each
MYR12.53
Temporarily out of stock
Schneider Electric R9R RCCB, 25A, 2 Pole, 10mA, Type A, 230V ac
  • RS Stock No. 212-340
  • Mfr. Part No. R9R26225
Each
MYR734.92
In Stock
Eaton RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 227-0738
  • Mfr. Part No. 267448 PFGM-63/2/003-A
Each
MYR433.93
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 32A Curve D, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2405
  • Mfr. Part No. M9F23332
Each
MYR279.32
In Stock
RS PRO 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-609
Each (In a Pack of 10)
MYR1.725
In Stock
ABB Earth & Neutral Terminal Bar for use with MCB
  • RS Stock No. 232-0026
  • Mfr. Part No. GJI2320131R0001 SZ-KLB 8
1 Box of 1
MYR40.03
In Stock
Mersen 16A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-7000
  • Mfr. Part No. G200750
Each (In a Pack of 10)
MYR8.037
In Stock
ABB, Tmax XT MCCB 3P 100A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 831-9172
  • Mfr. Part No. 1SDA067416R1 XT1N 160 TMD 100-1000 3p F F
Each
MYR1,508.64
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