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

309 / 999+
Temporarily out of stock
Hager Hager NSN Circuit Breaker, 2P, 50A Curve D, 415V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-719
  • Mfr. Part No. NSN250
Each
MYR1,166.53
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 6A, Type Z
  • RS Stock No. 225-5994
  • Mfr. Part No. 2CDS251001R0378 S201 Z 6A - 10 KA
Each
MYR254.07
Temporarily out of stock
SENTRON Terminal for use with 3VA52 Series
  • RS Stock No. 263-578
  • Mfr. Part No. 3VA9233-0JA11
1 Kit
MYR205.32
In Stock
Wickmann 4.2A Resettable Fuse, 30V dc
  • RS Stock No. 174-0464
  • Mfr. Part No. RF1672-000
Each (In a Box of 500)
MYR3.089
In Stock
Siemens Fuse Puller Fuse Puller, Sizes 000 → 3in
  • RS Stock No. 282-4685
  • Mfr. Part No. 3NX1015
Each
MYR257.62
In Stock
Eaton 12A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7257
  • Mfr. Part No. AGC-12-R
Each
MYR6.45
In Stock
Eaton 4A British Standard Fuse, A1, 550V, 44.5mm
  • RS Stock No. 413-276
  • Mfr. Part No. NITD4
Each (In a Pack of 5)
MYR16.728
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4801
  • Mfr. Part No. 3VA2563-5HK32-0AA0
Each
MYR15,626.12
In Stock
Mersen Surge Protector, 50kA, 1000V (Volts), DIN Rail Mount
  • RS Stock No. 361-604
  • Mfr. Part No. 44020001
Each
MYR161.69
Temporarily out of stock
Better World
ABB, XT3S MCCB 3P 250A, Breaking Capacity 42.5 kA, Fixed Mount
  • RS Stock No. 236-6664
  • Mfr. Part No. 1SDA068271R1 XT3S 250 TMG 250A FF
Each
MYR5,519.22
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 24 Way, 250 A
  • RS Stock No. 336-638
  • Mfr. Part No. SEA9BPN24
Each
MYR16,249.18
In Stock
Schurter Thermal Circuit Breaker - ABT 125/250V Voltage Rating Snap In, 20A Current Rating
  • RS Stock No. 868-9178
  • Mfr. Part No. 4430.2115
Each
MYR129.10
In Stock
WR-FSH Fuseholder Clip Black SMT 5x20mm
  • RS Stock No. 563-074P
  • Mfr. Part No. 696103201002
Each (Supplied in a Box)
MYR55.15
Temporarily out of stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)1(-4), NZM1(-4), PN1(-4)
  • RS Stock No. 246-005
  • Mfr. Part No. 125958 NZM1-XHB-DA-NA
Each
MYR1,662.13
In Stock
ABB Installaton Accessory for use with ComfortLine A & B
  • RS Stock No. 289-1611
  • Mfr. Part No. 2CPX052459R9999
Each
MYR45.66
In Stock
Schurter 500mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7847
  • Mfr. Part No. 0001.1001
Each (In a Pack of 10)
MYR3.119
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-255
  • Mfr. Part No. 3VA6210-8JQ31-0AA0
Each
MYR20,314.93
Temporarily out of stock
Better World
Siemens 5sV3 RCCB, 40A, 2 Pole, 100mA, Type A, 230V ac
  • RS Stock No. 211-9660
  • Mfr. Part No. 5SV3414-6
Each
MYR875.96
In Stock
Bourns Resettable Fuse, 28V dc
  • RS Stock No. 910-8614
  • Mfr. Part No. NR82CB0
Each (In a Pack of 5)
MYR4.354
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 200A 3VA2, 3 channels
  • RS Stock No. 157-145
  • Mfr. Part No. 3VA2220-5MP32-0AA0
Each
MYR9,672.65
1
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