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

172 / 999+
In Stock
Eaton xEffect MCB, 1P, 4A Curve B
  • RS Stock No. 230-0912
  • Mfr. Part No. 177380 FAZ6-B4/1
Each
MYR128.21
In Stock
Bulgin 10A Inline Fuse Holder for 6.3 x 25mm Fuse, 250V ac
  • RS Stock No. 408-410
  • Mfr. Part No. FX0285
Each (In a Pack of 5)
MYR53.964
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 2m, 40A, Canalis KBB Series
  • RS Stock No. 211-0383
  • Mfr. Part No. KBB40ED2202W
Each
MYR530.62
In Stock
Eaton xEffect - FRCmM RCCB, 25A, 2 Pole, 100mA, 240 V ACV ac
  • RS Stock No. 123-593
  • Mfr. Part No. 170389 FRCMM-25/2/01-G/A
Each
MYR1,416.40
In Stock
Eaton 250A Tag Fuse, NH2, 1kV
  • RS Stock No. 282-6184
  • Mfr. Part No. BSF-250G-NH210
Each
MYR1,516.75
In Stock
ABB RCBO, 25A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6969
  • Mfr. Part No. 2CSR255080R1254 DS201 C25 AC30
Each
MYR863.00
Temporarily out of stock
Phoenix Contact Three Phase Surge Arrester, 40kA, = 1.5kV, DIN Rail Mount
  • RS Stock No. 249-9523
  • Mfr. Part No. 2920243
Each
MYR1,891.81
Temporarily out of stock
ABB S-ARC1 M MCB, 1+N, 16A Curve B, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 175-9939
  • Mfr. Part No. 2CSA275901R9165 S-ARC1 M B16
Each
MYR1,234.12
Temporarily out of stock
Eaton 10A Tag Fuse, 550V ac
  • RS Stock No. 228-808
  • Mfr. Part No. NITD10 10A 550V AC BS88 FUSE
1 Pack of 20
MYR893.75
In Stock
Leitungsschutzschalter Resi9 3P, 25A, C
  • RS Stock No. 537-815
  • Mfr. Part No. R9F28325
Each
MYR695.41
In Stock
Siemens 25A Diazed Fuse, gG, 690/600V ac/dc
  • RS Stock No. 167-693
  • Mfr. Part No. 5SD8025
1 Pack of 5
MYR689.65
In Stock
ABB Surge Protector, 1.8kV, DIN Rail Mount
  • RS Stock No. 289-1630
  • Mfr. Part No. 2CTB803871R1200
Each
MYR433.33
In Stock
Better World
Schneider Electric Linergy Busbar, 690V, 45mm Pitch
  • RS Stock No. 400-1990
  • Mfr. Part No. GV2G245
Each
MYR128.28
In Stock
nVent ERICO Earth Bar
  • RS Stock No. 277-6234
  • Mfr. Part No. EEB04C506D0A
Each
MYR942.54
Temporarily out of stock
ABB DDA200 RCD, 25A, 2 Pole, 300mA
  • RS Stock No. 225-6074
  • Mfr. Part No. 2CSB202101R3250 DDA202 A-25/0.3
Each
MYR639.59
Temporarily out of stock
80A NH Fuse, 58 x 30 x 135mm, 500V ac
  • RS Stock No. 262-108
  • Mfr. Part No. 80NHG01BI NH FUSE 80A 500V GL/GG SIZE 01
1 Pack of 3
MYR135.43
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 50A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-444
  • Mfr. Part No. 3VA5150-6ED31-0AA0
Each
MYR2,117.02
Temporarily out of stock
Siemens 500A Tag Fuse, 77mm, 800V
  • RS Stock No. 608-647
  • Mfr. Part No. 3NE4334-6B
1 Pack of 3
MYR2,606.43
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 6A Curve C, 230V AC, 72V DC
  • RS Stock No. 209-7480
  • Mfr. Part No. 5SL4506-7
Each
MYR352.35
Temporarily out of stock
SENTRON for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-628
  • Mfr. Part No. 3VA9677-0CK72
1 Kit
MYR6,409.52
1
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