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

315 / 999+
Limited stock
Better World
Siemens Sentron 5SY6 MCB, 1P, 1A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 521-4917
  • Mfr. Part No. 5SY6101-7
Each
MYR125.15
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 570A, Fixed Mount
  • RS Stock No. 260-8201
  • Mfr. Part No. C63F34V570
Each
MYR40,510.95
Temporarily out of stock
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-457
  • Mfr. Part No. 3VA5215-7EC31-2AA0
Each
MYR9,207.46
In Stock
ABB 110 → 250V ac/dc Shunt Trip Shunt trip for use with S800PV, S800S, S800N, S800C, S800B, S800HV, S800U Series
  • RS Stock No. 435-548
  • Mfr. Part No. 2CCS800900R0211 S800-SOR250
Each
MYR369.02
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 4P 250A, Fixed Mount
  • RS Stock No. 254-6358
  • Mfr. Part No. C25F4
Each
MYR4,970.82
In Stock
Better World
Schneider Electric Busbar End Feed Unit, Canalis Series
  • RS Stock No. 248-4073
  • Mfr. Part No. KNA63AB4
Each
MYR813.25
In Stock
Legrand 3.15A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 266-3067
  • Mfr. Part No. 0 102 30
1 Box of 10
MYR86.11
In Stock
Littelfuse 315mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4656
  • Mfr. Part No. 0215.315MXP
Each (In a Pack of 10)
MYR5.683
In Stock
Better World
Siemens, SENTRON Circuit breaker 3P 630A, Breaking Capacity 85 kA, DIN Rail Mount
  • RS Stock No. 224-7918
  • Mfr. Part No. 3VA2463-5HL32-0AA0
Each
MYR11,205.19
In Stock
Eaton 100mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-2996
  • Mfr. Part No. GMA-100-R
Each
MYR13.36
Temporarily out of stock
ABB S803N MCB, 3P, 32A Curve B, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-994
  • Mfr. Part No. 2CCS893001R0325
Each
MYR1,323.86
Temporarily out of stock
ABB, SACE FORMULA MCCB Molded Case Circuit Breaker 1P 16A, Fixed Mount
  • RS Stock No. 231-9297
  • Mfr. Part No. 1SDA074641R1 XT1N 125 TMF 50-500 3p F F
Each
MYR803.20
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 3A Curve K
  • RS Stock No. 237-3321
  • Mfr. Part No. 2CDS254001R0317 S204 K 3A - 10 KA
Each
MYR905.71
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 40A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7609
  • Mfr. Part No. 2CDS253001R0405 S203-B40
Each
MYR392.33
In Stock
Eaton MEMShield MCB, 1P, 32A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3025
  • Mfr. Part No. EMBH132 EMBH132
Each
MYR153.38
Temporarily out of stock
HENSEL Distribution Board, 16 Way, 125 A
  • RS Stock No. 183-2869
  • Mfr. Part No. FPVN1600GB
Each
MYR9,634.29
In Stock
Littelfuse 10A Inline Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 878-3882
  • Mfr. Part No. 01500274Z
Each (In a Pack of 10)
MYR14.662
In Stock
Wurth Elektronik 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 893-0586
  • Mfr. Part No. 696106003002
Each (In a Pack of 10)
MYR2.962
In Stock
Schurter SMD Non Resettable Fuse 250mA, 125 V ac, 63V dc
  • RS Stock No. 754-6326P
  • Mfr. Part No. 3413.0010.22
Each (Supplied on a Reel)
MYR4.128
Temporarily out of stock
ABB S800S MCB, 4P, 50A Curve B, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 141-272
  • Mfr. Part No. 2CCS864001R0505
Each
MYR2,303.04
1
315
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