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

257 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 210-1706
  • Mfr. Part No. 3VA2040-6HN46-0AA0
Each
MYR4,932.76
In Stock
ABB RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, System Pro M Compact Range
  • RS Stock No. 201-6952
  • Mfr. Part No. 2CSR275080R1065 DS201 M B6 AC30
Each
MYR479.44
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 3P, 3A Curve B, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-298
  • Mfr. Part No. 5SY4303-6
Each
MYR543.28
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 250A 1SDA07, 4 channels
  • RS Stock No. 259-4465
  • Mfr. Part No. 1SDA072673R1
Each
MYR38,550.74
Temporarily out of stock
Eaton 20A Rail Mount Fuse Holder, 1P, 460 V dc, 660 → 690V ac
  • RS Stock No. 182-1406
  • Mfr. Part No. RS20F
Each (In a Box of 10)
MYR192.047
In Stock
Littelfuse 20A Panel Mount Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 787-4233P
  • Mfr. Part No. 01550320ZXU
Each (Supplied in a Bag)
MYR18.17
In Stock
Eaton 208 → 250V ac/dc Shunt Trip Shunt trip for use with N(S)1(-4) Series, NZM1(-4) Series
  • RS Stock No. 454-8219
  • Mfr. Part No. 259726 NZM1-XA208-250AC/DC
Each
MYR653.01
Temporarily out of stock
Schneider Electric
  • RS Stock No. 230-2336
  • Mfr. Part No. GK2AF01
Each
MYR106.62
In Stock
Better World
Schneider Electric Compact Ins, Compact Insj, Compact Inv, Compact Nsx, Easypact Cvs Spreader for use with Compact Nsx
  • RS Stock No. 221-1236
  • Mfr. Part No. LV432493
Each
MYR991.19
In Stock
Siemens 50A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-929
  • Mfr. Part No. 3NA3820
Each (In a Pack of 3)
MYR103.717
In Stock
RS PRO 3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3405
Each (In a Pack of 10)
MYR2.025
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 63A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9377
  • Mfr. Part No. 3VA1163-3ED22-0AA0
Each
MYR1,427.07
Temporarily out of stock
Eaton Circuit Trip Circuit Trip for use with IZMX…
  • RS Stock No. 132-433
  • Mfr. Part No. 183989 IZMX-PXRV-TAM-1
Each
MYR39,521.11
Temporarily out of stock
Siemens Fuse Holder Cap
  • RS Stock No. 167-682
  • Mfr. Part No. 5SH1170
1 Pack of 5
MYR391.89
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-5070
  • Mfr. Part No. 3VA1216-4EF42-0AA0
Each
MYR5,172.28
In Stock
Lovato ModuLo P1MB MCB, 4P, 20A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-6009
  • Mfr. Part No. P1MB4PD20
Each
MYR646.32
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 320A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 230-979
  • Mfr. Part No. 110302 NZMN3-A320-BT
Each
MYR12,221.55
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 125A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-703
  • Mfr. Part No. IL1253P36
Each
MYR3,967.32
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 63A, Breaking Capacity 36kA
  • RS Stock No. 260-9742
  • Mfr. Part No. LV510345
Each
MYR2,891.72
In Stock
Europa EUC3P EUC MCB, 3P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6591
  • Mfr. Part No. EUC3P32C
Each
MYR134.04
1
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