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

164 / 999+
SENTRON for use with 3VA51 Series
  • RS Stock No. 263-543
  • Mfr. Part No. 3VA9137-0CK12
1 Kit
MYR4,486.67
Mersen 160A Bolted Tag Fuse, B2, 460 V dc, 690V ac, 111mm
  • RS Stock No. 178-1135
  • Mfr. Part No. E1006622 / BTF69V160
Each (In a Pack of 5)
MYR187.418
Littelfuse SMD Non Resettable Fuse 3A, 125V ac/dc
  • RS Stock No. 541-3647P
  • Mfr. Part No. 0452003.MRL
Each (Supplied on a Reel)
MYR9.106
Littelfuse SMD Non Resettable Fuse 500mA, 125V ac
  • RS Stock No. 769-3725
  • Mfr. Part No. 0452.500NRL
Each (In a Pack of 10)
MYR7.914
Bourns SMD Non Resettable Fuse 250mA, 125V ac
  • RS Stock No. 191-4168
  • Mfr. Part No. SF-2410FP025T-2
Each (On a Reel of 1000)
MYR4.702
Schneider Electric, ComPacT MCCB 4P 50A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 345-314
  • Mfr. Part No. C10H6TM050
Each
MYR6,888.34
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4LE 3 Pole 690V ac Voltage Rating, 3.5A Current Rating
  • RS Stock No. 175-1455
  • Mfr. Part No. GV4LE03N6
Each
MYR2,688.85
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 4A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3240
  • Mfr. Part No. A9F84204
Each
MYR415.27
Littelfuse SMD Non Resettable Fuse 10A, 125V ac/dc
  • RS Stock No. 541-3467
  • Mfr. Part No. 0451010.MRL
Each (In a Pack of 10)
MYR7.316
Littelfuse 20A Panel Mount Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 787-4233
  • Mfr. Part No. 01550320ZXU
Each
MYR18.17
ABB RCBO, 50A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5200
  • Mfr. Part No. 2CSR274001R1505
Each
MYR2,555.99
Eaton 63A NH Fuse, NH2, 690V ac
  • RS Stock No. 181-8761
  • Mfr. Part No. 63NHG00B-690
Each
MYR41.89
ABB System Pro M Compact S200M MCB, 3P, 40A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4324
  • Mfr. Part No. 2CDS273001R0404 S203M-C40
Each
MYR536.20
Better World
Schneider Electric Busbar Trunking Jointing Device, 400A, Canalis KS Series
  • RS Stock No. 211-0467
  • Mfr. Part No. KSA400ZJ4
Each
MYR1,493.63
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
MYR219.81
Schneider Electric Acti9 1 Phase Distribution Board, 18 Way, 125 A
  • RS Stock No. 339-811
  • Mfr. Part No. SEA9APN18
Each
MYR1,491.76
Schneider Electric Acti9 3 Phase Distribution Board, 20 Way, 125 A
  • RS Stock No. 339-646
  • Mfr. Part No. SEB48S12125
Each
MYR24,151.80
Eaton 250A Bolted Tag Fuse, 700V ac/dc, 108.71mm
  • RS Stock No. 849-6005
  • Mfr. Part No. FWP-250A
Each
MYR2,721.00
ABB System Pro M Compact S200M MCB, 4P, 10A Curve K, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-977
  • Mfr. Part No. 2CDS274001R0427
Each
MYR2,669.06
Bourns 0.65A Resettable Fuse, 60V
  • RS Stock No. 647-8487P
  • Mfr. Part No. MF-R065
Each (Supplied in a Bag)
MYR1.643
1
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