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

187 / 999+
In Stock
Eaton BB-EV for use with Busbar
  • RS Stock No. 922-7232
  • Mfr. Part No. 104903 ZV-BS-G
Each
MYR24.15
Currently unavailable
Schurter Circuit Breaker Switch - TA45 2 Pole 120V ac Voltage Rating Panel Mount, 5.5A Current Rating
  • RS Stock No. 868-9064
  • Mfr. Part No. 4430.0479
Each
MYR161.42
Temporarily out of stock
Eaton 50A Tag Fuse, 22 x 86mm, 0.46/0.66kV, 73mm
  • RS Stock No. 261-419
  • Mfr. Part No. TIS50
1 Pack of 20
MYR2,026.00
Temporarily out of stock
Eaton NZM Electronic Circuit Breaker 12A , Fixed
  • RS Stock No. 120-825
  • Mfr. Part No. 158241 PKE12/AK
Each
MYR327.83
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4670
  • Mfr. Part No. 3VA2140-7KP42-0AA0
Each
MYR11,974.70
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3+N, 16A Curve K, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 200-349
  • Mfr. Part No. 2CDS383103R0467
Each
MYR2,714.06
In Stock
Better World
Schneider Electric Surge Protector, 5kA, DIN Rail Mount
  • RS Stock No. 776-3878
  • Mfr. Part No. A9L16296
Each
MYR2,036.91
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1P, 40A, Type Z, 240V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 204-455
  • Mfr. Part No. 2CDS381001R0558
Each
MYR863.86
Temporarily out of stock
ABB S301 MCB, 1P, 63A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 204-458
  • Mfr. Part No. 2CDS381001R0634
Each
MYR780.05
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 10A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-642
  • Mfr. Part No. 3RV2411-1JA10-0BA0
Each
MYR834.68
In Stock
RS PRO 35A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3656
Each (In a Pack of 5)
MYR56.718
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 341-204
  • Mfr. Part No. C100N420FM
Each
MYR58,363.98
Limited stock
Limitor Thermal Fuse +97°C 2 A, 250V ac
  • RS Stock No. 116-114
  • Mfr. Part No. SM 092 A0 2A
Each (In a Pack of 5)
MYR6.48
In Stock
Eaton MCCB 3P 63A, Breaking Capacity 80 kA, Fixed Mount
  • RS Stock No. 628-8048
  • Mfr. Part No. 259140 PN1-63
1 Box of 1
MYR956.58
Temporarily out of stock
ABB S800PV MCB, 4P, 125A, 1500V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5962
  • Mfr. Part No. 2CCF019642R0001 S804PV-SD125
Each
MYR3,854.41
In Stock
Better World
Schneider Electric Nsx400...630, Nsx400...630 Dc, Powerpact Multistandard Padlock Device for use with Compact Nsx
  • RS Stock No. 221-1273
  • Mfr. Part No. LV432631
Each
MYR228.68
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 3 channels
  • RS Stock No. 157-220
  • Mfr. Part No. 3VA2163-8HN32-0AA0
Each
MYR6,386.61
In Stock
Eaton 20A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7137
  • Mfr. Part No. MDL-20-R
Each
MYR15.29
In Stock
Schneider Electric 8A GG Cartridge Fuse, 8.5 x 31.5mm
  • RS Stock No. 590-001
  • Mfr. Part No. DF2BN0800
1 Pack of 10
MYR76.07
Temporarily out of stock
Eaton Eaton Moeller 2 Phase Busbar, 600V, 26.4mm Pitch
  • RS Stock No. 123-051
  • Mfr. Part No. 171143 Z-BB/UL25/2X1P1MU+AUX/38
Each
MYR806.00
1
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