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

199 / 999+
Siemens 25A Cartridge Fuse, 14 X 51mm
  • RS Stock No. 665-076
  • Mfr. Part No. 3NW8110-1
1 Pack of 10
MYR265.54
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-3079
  • Mfr. Part No. 1SDA070933R1
Each
MYR35,219.21
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3540
  • Mfr. Part No. 1SDA071520R1
Each
MYR62,465.55
Phoenix Contact 30A Green Automotive Car Fuse, 32V No
  • RS Stock No. 253-7603
  • Mfr. Part No. 2908365
Each (In a Pack of 2)
MYR39.825
ABB S303 MCB, 3P, 2A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-053
  • Mfr. Part No. 2CDS383001R0021
Each
MYR2,585.13
Better World
Schneider Electric Horizontal Distribution Busbar Trunking, 3m, 630A, Canalis KS Series
  • RS Stock No. 211-0482
  • Mfr. Part No. KSA630ED4306
Each
MYR11,962.61
Phoenix Contact Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 201-6201
  • Mfr. Part No. 2906770
Each
MYR659.03
Eaton Bussmann Series 5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3043
  • Mfr. Part No. BK-GMA-5-R
Each
MYR3.65
Phoenix Contact Surge Protector, 40kA, 1000V dc
  • RS Stock No. 269-7885
  • Mfr. Part No. 1056071
Each
MYR2,919.79
Schneider Electric, PowerPact Circuit breaker 4P 70A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 357-130
  • Mfr. Part No. BDL46070LU
Each
MYR5,917.08
Better World
Schneider Electric RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Resi9 Range
  • RS Stock No. 247-2231
  • Mfr. Part No. R9D01616
Each
MYR206.00
Siemens SENTRON 3VA9 Rotary Operator for use with 3VA1 250
  • RS Stock No. 218-1838
  • Mfr. Part No. 3VA9257-0GK00
Each
MYR497.29
Littelfuse 20A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0091
  • Mfr. Part No. 0314020.HXP
Each (In a Pack of 5)
MYR7.946
Better World
Schneider Electric, ComPact MCCB, Fixed Mount
  • RS Stock No. 221-0951
  • Mfr. Part No. LV429414
Each
MYR1,095.47
ABB System Pro M Compact S200 M UC MCB, 2P, 50A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-074
  • Mfr. Part No. 2CDS272061R0577
Each
MYR2,252.22
Hinode Electric Co Ltd 16A Bolted Tag Fuse, 660 V ac, 450V dc, 62.7mm
  • RS Stock No. 103-4240
  • Mfr. Part No. 660GH-016
Each (In a Pack of 5)
MYR80.706
WAGO Circuit Breaker, 10A, 250V AC, 250 V Breaking Capacity
  • RS Stock No. 279-4270
  • Mfr. Part No. 789-800
Each
MYR303.41
Eaton RCD, 25A, 2 Pole, 30mA, Type G
  • RS Stock No. 922-8682
  • Mfr. Part No. 235449 PFIM-25/2/003-G-MW
Each
MYR581.28
Siemens SENTRON Function Tester for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-587
  • Mfr. Part No. 3VW9011-0AT32
Each
MYR602.93
Eaton AZ MCB, 3P, 80A Curve B, 400V AC, 20 kA Breaking Capacity
  • RS Stock No. 272-0735
  • Mfr. Part No. 174512 AZ-3-B80
Each
MYR1,658.23
1
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