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

2300 / 999+
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3224
  • Mfr. Part No. 1SDA071102R1
Each
MYR58,729.45
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4659
  • Mfr. Part No. 3VA2140-7HN46-0AA0
Each
MYR6,127.66
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3783
  • Mfr. Part No. 3VA2125-6HL36-0AA0
Each
MYR4,053.37
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 240V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 217-6376
  • Mfr. Part No. 2800884
Each
MYR474.12
In Stock
Mersen 20A Bolted Tag Fuse, A2, 460 V dc, 690V ac, 73mm
  • RS Stock No. 178-1101
  • Mfr. Part No. R1019260 / BTIA69V20M32
Each (In a Pack of 10)
MYR59.465
Temporarily out of stock
Siemens SENTRON Mounting Adapter for use with SIRIUS 3RV2
  • RS Stock No. 272-0200
  • Mfr. Part No. 3VA9137-0GX01
Each
MYR100.92
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX250 Circuit Breakers
  • RS Stock No. 260-7834
  • Mfr. Part No. C2536M220
Each
MYR11,312.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 271-9591
  • Mfr. Part No. 3VA10402ED460AA0
Each
MYR2,146.41
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3846
  • Mfr. Part No. 1SDA071858R1
Each
MYR190,684.82
Temporarily out of stock
Wickmann 0.5A Resettable Fuse, 72 V ac, 72V dc
  • RS Stock No. 174-0439
  • Mfr. Part No. RF2567-000
1 Box of 10000
MYR13,013.80
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3664
  • Mfr. Part No. 3VA2025-7HL32-0AA0
Each
MYR3,534.05
Temporarily out of stock
Siemens SENTRON 3 Phase Busbar, 230V, 17.6mm Pitch
  • RS Stock No. 187-5227
  • Mfr. Part No. 5ST3773-0
Each
MYR1,434.86
Temporarily out of stock
Eaton 25A DIN Rail Mount 6.3 x 32mm Fuse Block, 300V
  • RS Stock No. 233-0627
  • Mfr. Part No. BK-S-8301-1X-DIN
1 Box of 198
MYR5,669.85
Temporarily out of stock
ABB RCBO, 25A Current Rating, 2P Poles, 300mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6910
  • Mfr. Part No. 2CSR255080R3255
Each
MYR699.00
Temporarily out of stock
Better World
Eaton 125A Tag Fuse, 205 x 78 x 89mm, 1.5kV, 167mm
  • RS Stock No. 282-6217
  • Mfr. Part No. PV-125A-2XL-3BU-15
Each
MYR2,301.71
Temporarily out of stock
Better World
Schneider Electric Vigi iTG40 RCD, 40A, 1+N Pole, 30mA
  • RS Stock No. 191-6141
  • Mfr. Part No. A9Y14640
Each
MYR2,259.88
Temporarily out of stock
Better World
Siemens Sentron 5SY4 MCB, 1+N, 63A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3220
  • Mfr. Part No. 5SY4563-7
Each
MYR621.76
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-3620
  • Mfr. Part No. 1SDA071596R1
Each
MYR45,069.22
Temporarily out of stock
Better World
Schneider Electric 690 V ac, 750V dc Circuit Trip for use with Compact NSX 100/160 Circuit Breakers
  • RS Stock No. 212-0237
  • Mfr. Part No. LV429164
Each
MYR705.01
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3689
  • Mfr. Part No. 3VA2025-7KP46-0AA0
Each
MYR11,691.42
1
2300
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