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

46578 Products showing for Fuses & Circuit Breakers

234 / 999+
Littelfuse 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0041
  • Mfr. Part No. 0219005.MXABP
Each (In a Pack of 10)
MYR5.244
Bourns 1.1A Resettable Fuse, 6V
  • RS Stock No. 647-8213P
  • Mfr. Part No. MF-MSMF110-2
Each (Supplied on a Reel)
MYR1.505
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 131-440
  • Mfr. Part No. 2800980
Each
MYR1,641.59
ABB S401M MCB, 1P, 10A Curve K, 254V AC, 12V DC, 25 kA Breaking Capacity
  • RS Stock No. 140-787
  • Mfr. Part No. 2CCS571001R0427
Each
MYR267.59
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 7A Current Rating
  • RS Stock No. 782-0927
  • Mfr. Part No. W58-XB1A4A-7
Each
MYR33.03
Eaton MCB, 1+N, 20A Curve B
  • RS Stock No. 230-1069
  • Mfr. Part No. 264727 PLG4-B20/1N
Each
MYR245.88
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100/160/250
  • RS Stock No. 260-9365
  • Mfr. Part No. C103TM100
Each
MYR1,203.46
ABB Front Terminal for use with S6 630, T6 630
  • RS Stock No. 250-4505
  • Mfr. Part No. 1SDA023389R1
Each
MYR495.85
Schneider Electric 440V ac Circuit Breaker Circuit Trip for use with Circuits
  • RS Stock No. 130-543
  • Mfr. Part No. C16F44B160
Each
MYR22,782.47
Eaton 32A Cartridge Fuse, 25 x 110mm
  • RS Stock No. 228-783
  • Mfr. Part No. CEO32
1 Pack of 10
MYR2,063.43
Hager Vega D Mounting Plate
  • RS Stock No. 144-4605
  • Mfr. Part No. FD02F2
Each
MYR1,797.41
ABB 160A Centred Tag Fuse, NH00, 500V
  • RS Stock No. 779-9980
  • Mfr. Part No. OFAF00H160 1SCA022627R1710
Each
MYR42.60
Littelfuse 400mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4583
  • Mfr. Part No. 0218.400MXP
Each (In a Pack of 10)
MYR4.636
Eaton 100A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 181-8519
  • Mfr. Part No. C22M100
Each (In a Box of 10)
MYR24.807
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4323
  • Mfr. Part No. 1SDA072477R1
Each
MYR104,542.06
Better World
Siemens Sentron 5SY6 MCB, 1P, 20A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 489-6681
  • Mfr. Part No. 5SY6120-6
Each
MYR100.21
Eaton 16A Bolted Tag Fuse, 250 V dc, 550V ac, 111.5mm
  • RS Stock No. 181-8683
  • Mfr. Part No. AD16
Each
MYR98.54
Better World
ABB System Pro M Compact S200 MCB, 1P, 2A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7649
  • Mfr. Part No. 2CDS251001R0024 S201-C2
Each
MYR160.84
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 500A, Fixed Mount
  • RS Stock No. 232-0098
  • Mfr. Part No. 1SDA054456R1 T5N630 FF TMA 500A
Each
MYR6,937.08
Bourns 5A Resettable Fuse, 30V
  • RS Stock No. 647-8617P
  • Mfr. Part No. MF-R500
Each (Supplied in a Bag)
MYR2.544
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