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

311 / 999+
Temporarily out of stock
ABB, Tmax MCCB 3P 1.25kA, Fixed Mount
  • RS Stock No. 237-6001
  • Mfr. Part No. 1SDA062038R1 T7D-M 1250A FF
Each
MYR17,041.71
In Stock
ABB 20A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9959
  • Mfr. Part No. OFAF000H20 1SCA022627R0740
Each
MYR29.63
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 1+N, 40A Curve B
  • RS Stock No. 237-3208
  • Mfr. Part No. 2CDS251103R0405
Each
MYR475.58
Temporarily out of stock
Eaton RCBO, 16A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type C, FRBmM Range
  • RS Stock No. 123-671
  • Mfr. Part No. 170832 FRBMM-C16/2/01-LIA
Each
MYR752.47
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 232-0086
  • Mfr. Part No. 1SDA054333R1 T5S400 FF PR221-LS 400A
Each
MYR8,437.39
Temporarily out of stock
ABB S301 MCB, 1P, 3A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-292
  • Mfr. Part No. 2CDS381001R0317
Each
MYR773.60
Temporarily out of stock
Eaton xEffect RCCB, 40A, 2 Pole, 100mA, Type F, 240V ac
  • RS Stock No. 246-623
  • Mfr. Part No. 187373 FRCMM-40/2/01-G/F
Each
MYR1,357.95
Temporarily out of stock
Siemens 224A NH Fuse, NH1, 440 - 500V ac/dc
  • RS Stock No. 269-8317
  • Mfr. Part No. 3NA7142
Each (In a Pack of 3)
MYR89.70
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 40A Curve C, 440V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2424
  • Mfr. Part No. A9F07440
Each
MYR1,486.05
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 63A Curve C, 400V AC, 110V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7829
  • Mfr. Part No. 2CDS254001R0634 S204-C63
Each
MYR911.73
In Stock
Better World
Schneider Electric iID RCCB, 40A, 4 Pole, 300mA
  • RS Stock No. 734-9355
  • Mfr. Part No. A9R14440
Each
MYR1,260.57
In Stock
SIBA 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 768-6125
  • Mfr. Part No. 5021526.20
Each
MYR79.59
In Stock
Eaton RCD, 63A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 922-8617
  • Mfr. Part No. 235398 PFIM-63/2/003-MW
Each
MYR637.85
In Stock
Wickmann 7.5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 174-0225
  • Mfr. Part No. 029707.5WXNV
1 Box of 3000
MYR2,565.00
In Stock
Siemens 250A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2010
  • Mfr. Part No. 3NA7144
Each (In a Pack of 3)
MYR84.60
In Stock
Schneider Electric RCBO, 20A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 130-733
  • Mfr. Part No. A9D55420
Each
MYR4,832.05
In Stock
Lovato ModuLo P1MB MCB, 2P, 1A Curve D, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5740
  • Mfr. Part No. P1MB2PD01
Each
MYR291.57
In Stock
Littelfuse SMD Non Resettable Fuse 40A, 72V
  • RS Stock No. 895-1603
  • Mfr. Part No. 0456040.DR
Each (In a Pack of 10)
MYR25.166
Temporarily out of stock
32A Tag Fuse, 31 x 110mm, 415V
  • RS Stock No. 262-978
  • Mfr. Part No. 32MJ30-8
1 Pack of 10
MYR2,266.33
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-184
  • Mfr. Part No. KV 1512
Each
MYR509.17
1
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