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

46578 Products showing for Fuses & Circuit Breakers

193 / 999+
Eaton RCD, 10A, 2 Pole, 30mA, Type B, 230V ac
  • RS Stock No. 922-8718
  • Mfr. Part No. 236072 PKNM-10/1N/B/003-A-MW
Each
MYR711.44
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-793
  • Mfr. Part No. 3VA6440-8KP31-0AA0
Each
MYR28,462.63
RS PRO Residential RCCBs, 63A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 284-2375
Each
MYR548.03
Siemens SENTRON Cover Frame for use with 3VA51
  • RS Stock No. 162-027
  • Mfr. Part No. 3VA9033-0SB20
Each
MYR209.67
Better World
Schneider Electric RCBO, 32A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 201-2239
  • Mfr. Part No. A9DC3632
Each
MYR1,030.95
Bulgin 10A Inline Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 414-601
  • Mfr. Part No. FX0380
Each (In a Pack of 5)
MYR29.048
Eaton xEffect - FBSmV RCCB, 40A, 3 Pole, 30mA, Type G, 240/415V ac
  • RS Stock No. 123-549
  • Mfr. Part No. 170238 FBSMV-40/3/003-G
Each
MYR815.02
Eaton xEffect - FRCmM RCCB, 25A, 4 Pole, 30mA, Type A, 240/415V ac
  • RS Stock No. 123-590
  • Mfr. Part No. 170332 FRCMM-25/4/003-A
Each
MYR652.88
Fuse Holder Fuse Block
  • RS Stock No. 263-161
  • Mfr. Part No. EBF2330V1
Each
MYR1,003.18
Schneider Electric Controller for use with Compact NS100 → 630, Compact NS630b → 1600, Masterpact NT,
  • RS Stock No. 247-1723
  • Mfr. Part No. 29376
Each
MYR9,266.02
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS Stock No. 229-388
  • Mfr. Part No. 116895 NZM2-XHB-DA
Each
MYR1,901.13
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 3P, 32A Curve D, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-313
  • Mfr. Part No. SE10D332
Each
MYR640.83
Schneider Electric, ComPacT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 260-7545
  • Mfr. Part No. C11B4TM063L
Each
MYR2,847.41
Hager NFN MCB, 2P, 10A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4712
  • Mfr. Part No. NFN210
Each
MYR481.97
Siemens 10A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6906
  • Mfr. Part No. 3NA6803-6
Each (In a Pack of 3)
MYR359.347
Better World
ABB System Pro M Compact S200 MCB, 1+N, 63A Curve D
  • RS Stock No. 237-3225
  • Mfr. Part No. 2CDS251103R0631
Each
MYR811.78
Legrand DX Range DNX3 MCB, 1P, 20A Curve C, 250V AC, 12V DC, 4.5 kA Breaking Capacity
  • RS Stock No. 823-4677
  • Mfr. Part No. 4 067 84
Each
MYR154.59
Schneider Electric Acti9 3, 3+N Phase Distribution Board, 16 Way, 250 A
  • RS Stock No. 336-622
  • Mfr. Part No. SEA9BN16E
Each
MYR3,149.12
Eaton 250A Bolted Tag Fuse, 700V ac/dc, 108.71mm
  • RS Stock No. 849-6005
  • Mfr. Part No. FWP-250A
Each
MYR2,721.00
Schurter 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7832
  • Mfr. Part No. 0034.1520
Each (In a Bag of 10)
MYR1.368
1
193
2329
Results per page

Related links