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

165 / 999+
RS PRO SMD Non Resettable Fuse 20A, 125V
  • RS Stock No. 182-3997P
Each (Supplied in a Box)
MYR6.154
Bourns 0.9A Resettable Fuse, 60V
  • RS Stock No. 647-8538P
  • Mfr. Part No. MF-R090
Each (Supplied in a Bag)
MYR1.634
Mersen 6A Bolted Tag Fuse, A2C, 250 V dc, 550V ac, 73mm
  • RS Stock No. 178-1015
  • Mfr. Part No. V1019240 / BTIA55V6
Each (In a Pack of 10)
MYR37.855
Siemens 24V ac Remote Switch Circuit Trip
  • RS Stock No. 223-7644
  • Mfr. Part No. 5TT4452-2
Each
MYR570.28
Siemens, SENTRON MCCB 2P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-315
  • Mfr. Part No. 3VA5220-7ED61-0AA0
Each
MYR7,453.66
ABB Tmax T Cover for use with Tmax T
  • RS Stock No. 232-0117
  • Mfr. Part No. 1SDA054958R1 HTC T4 F
Each
MYR257.68
Better World
Siemens RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6182
  • Mfr. Part No. 5SU1324-7KX20
Each
MYR1,001.14
Eaton 100A British Standard Fuse, B1, 415V, 111mm
  • RS Stock No. 181-8466
  • Mfr. Part No. CD100M160
Each (In a Box of 10)
MYR162.755
Eaton 200A British Standard Fuse, B2, 415V ac, 111mm
  • RS Stock No. 156-8715
  • Mfr. Part No. DD200M250
Each
MYR209.30
SIBA 10A M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3470
  • Mfr. Part No. 70-010-05/10A
Each (In a Pack of 5)
MYR22.378
Mersen 10A Bolted Tag Fuse, A2, 460 V dc, 690V ac, 73mm
  • RS Stock No. 178-1090
  • Mfr. Part No. K1019254 / BTIA69V10
Each (In a Pack of 10)
MYR52.627
Siemens Busbar Tap-Off Unit, BD2 Series
  • RS Stock No. 213-2429
  • Mfr. Part No. BVP:203136
Each
MYR1,537.39
Siemens SENTRON 5SP3263 MCB, 2P, 63A, Type E
  • RS Stock No. 231-8311
  • Mfr. Part No. 5SP3263-3
Each
MYR2,119.11
Better World
Siemens Sentron 5SY4 MCB, 1P, 10A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 383-2024
  • Mfr. Part No. 5SY4110-7
Each
MYR123.32
RS PRO 200mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9591
Each (In a Pack of 10)
MYR1.876
RS PRO 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5972
Each (In a Pack of 10)
MYR1.297
Mersen 5A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2941
  • Mfr. Part No. X1014573
1 Box of 10
MYR843.71
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4111
  • Mfr. Part No. 1SDA072219R1
Each
MYR40,750.98
Eaton 3A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7077
  • Mfr. Part No. MDA-3-R
Each
MYR29.65
ABB Tmax XT Motor Operator for use with Tmax XT
  • RS Stock No. 237-6085
  • Mfr. Part No. 1SDA066465R1 MOE XT2-XT4 110...125VAC/D
Each
MYR4,388.01
1
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