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

46580 Products showing for Fuses & Circuit Breakers

77 / 999+
In Stock
WAGO Electronic Circuit Breaker 10A 24V 787, 8 channels , DIN Rail
  • RS Stock No. 303-281
  • Mfr. Part No. 787-3668
Each
MYR1,671.91
Temporarily out of stock
ABB F200 RCCB, 125A, 4 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 225-6117
  • Mfr. Part No. 2CSF204001R1950 F204 AC-125/0,03
Each
MYR6,719.22
Temporarily out of stock
ABB MCCB 4P 160A, Breaking Capacity 65 kA
  • RS Stock No. 192-0843
  • Mfr. Part No. 1SDA067095R1
Each
MYR4,550.71
In Stock
RS PRO 500mA F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9276
Each (In a Pack of 10)
MYR6.255
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 40A Curve C, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3474
  • Mfr. Part No. A9F77240
Each
MYR694.37
In Stock
Better World
Schneider Electric NSX Spreader for use with Compact Nsx100/160/250, Easypact Cvs 100/160/250
  • RS Stock No. 221-1223
  • Mfr. Part No. LV431563
Each
MYR316.25
Temporarily out of stock
Eaton 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 600V
  • RS Stock No. 225-8212
  • Mfr. Part No. BK-HVI-R
1 Bag of 20
MYR4,138.67
In Stock
Better World
Schneider Electric Auto Recloser Circuit Trip for use with Circuit Breaker
  • RS Stock No. 790-7359
  • Mfr. Part No. A9C70134
Each
MYR1,960.58
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 16A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0226
  • Mfr. Part No. 2CDS253001R0467 S203-K16
Each
MYR582.20
In Stock
Littelfuse 30A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3150
  • Mfr. Part No. 0KLK030.T
Each
MYR150.07
In Stock
WJ Furse Copper Earth Bar L. 400mm x W. 90mm x H. 90mm 6 Ways
  • RS Stock No. 124-2496
  • Mfr. Part No. 7TCA083670R0739 LK245-6
Each
MYR1,089.95
In Stock
Eaton MEMShield MCB, 3P, 6A Curve C, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3043
  • Mfr. Part No. EMCH306 EMCH306
Each
MYR680.04
Temporarily out of stock
Allen Bradley, 140G MCCB 3P 125A, Module Frame Mount
  • RS Stock No. 261-2825
  • Mfr. Part No. 140G-G2C3-C90
Each
MYR1,669.01
Temporarily out of stock
Legrand 1A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6113
  • Mfr. Part No. 0 133 01
Each (In a Box of 10)
MYR16.339
Temporarily out of stock
Phoenix Contact 2 Phase Surge Protector, 40kA, DIN Rail Mount
  • RS Stock No. 201-6717
  • Mfr. Part No. 2905350
Each
MYR1,157.93
In Stock
ETA Thermal Circuit Breaker - 1610 Single Pole 32V dc Voltage Rating, 15A Current Rating
  • RS Stock No. 409-895
  • Mfr. Part No. 1610-21-15A
Each
MYR53.35
In Stock
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 6A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8599
  • Mfr. Part No. EZ9F16106
Each
MYR41.55
In Stock
Phoenix Contact 1A Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 253-7610
  • Mfr. Part No. 2939014
Each (In a Pack of 10)
MYR2.375
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 125A, Breaking Capacity 18 kA, Fixed Mount
  • RS Stock No. 232-0217
  • Mfr. Part No. 1SDA066808R1 XT1B 160 TMD 125A FF
Each
MYR1,494.68
Temporarily out of stock
Schneider Electric RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 130-872
  • Mfr. Part No. A9D07225
Each
MYR3,534.63
1
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