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

253 / 999+
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 500A, Fixed Mount
  • RS Stock No. 250-4187
  • Mfr. Part No. 1SDA054465R1
Each
MYR20,977.17
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit with Fuse, Canalis KBC Series
  • RS Stock No. 219-8882
  • Mfr. Part No. KBC16DCP2
Each
MYR695.27
In Stock
Schurter SMD Non Resettable Fuse 5A, 125V ac/dc
  • RS Stock No. 131-741
  • Mfr. Part No. 3404.0017.11
Each (In a Pack of 10)
MYR3.591
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA13/14, 3VA23/24
  • RS Stock No. 153-370
  • Mfr. Part No. 3VA9483-0JC23
Each
MYR1,287.89
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 1A Curve C, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-309
  • Mfr. Part No. 2CDS271061R0014
Each
MYR549.52
In Stock
Eaton 100mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 852-7411
  • Mfr. Part No. GDC-100MA
Each (In a Pack of 5)
MYR47.58
Temporarily out of stock
Hager NRN MCB, 3P, 63A Curve C, 415V AC, 15 kA Breaking Capacity
  • RS Stock No. 597-949
  • Mfr. Part No. NRN363
Each
MYR1,685.28
Temporarily out of stock
Eaton xEffect MCB, 2P, 500mA Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3210
  • Mfr. Part No. 102157 FAZ-C0,5/2-NA
Each
MYR651.76
Temporarily out of stock
Schneider Electric Multi9 M9F1 MCB, 2P, 16A Curve D, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-129
  • Mfr. Part No. M9F12216
Each
MYR578.27
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-3593
  • Mfr. Part No. 1SDA071570R1
Each
MYR63,468.74
In Stock
Littelfuse 500mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4460
  • Mfr. Part No. 0216.500MXP
Each (In a Pack of 10)
MYR13.161
Temporarily out of stock
Better World
Schneider Electric GFP RCCB, 25A, 2 Pole, 26mA, 277V ac
  • RS Stock No. 211-2462
  • Mfr. Part No. M9R41225
Each
MYR1,405.06
In Stock
Mersen 32A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7432
  • Mfr. Part No. F212594
Each (In a Pack of 10)
MYR27.002
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3+N, 20A Curve D, 400V AC
  • RS Stock No. 238-3394
  • Mfr. Part No. A9P32720
Each
MYR1,176.08
Temporarily out of stock
Mersen 6A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2739
  • Mfr. Part No. E219240
1 Box of 10
MYR393.44
Temporarily out of stock
Littelfuse 12.5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2810
  • Mfr. Part No. 021612.5MXP
Each (In a Pack of 10)
MYR4.617
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3108
  • Mfr. Part No. 1SDA070961R1
Each
MYR31,316.20
Temporarily out of stock
ABB S303 MCB, 3P, 50A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-355
  • Mfr. Part No. 2CDS383001R0505
Each
MYR2,733.40
In Stock
Littelfuse 20A Base Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 300V ac
  • RS Stock No. 787-4316
  • Mfr. Part No. 03540821ZXBL
Each (In a Pack of 5)
MYR7.424
In Stock
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS Stock No. 563-447
Each (In a Pack of 10)
MYR3.284
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