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

236 / 999+
Siemens 63A Bottle Fuse Holder, 3P, 400V ac
  • RS Stock No. 190-9735
  • Mfr. Part No. 5SG7133
Each
MYR580.96
ABB SMISSLINE TP MCB, 2P, 500mA Curve C, 415V AC
  • RS Stock No. 246-2604
  • Mfr. Part No. 2CCS572001R0984
Each
MYR581.32
ABB System Pro M Compact S200 MCB, 4P, 500mA, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-269
  • Mfr. Part No. 2CDS254001R0158
Each
MYR2,524.85
Better World
Siemens Sentron 5SY4 MCB, 3P, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1369
  • Mfr. Part No. 5SY4306-8
Each
MYR702.20
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 4P 100A, Fixed Mount
  • RS Stock No. 221-0991
  • Mfr. Part No. LV430886
Each
MYR12,706.37
Eaton 15A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8239
  • Mfr. Part No. PV-15A10F
Each
MYR82.66
ABB 160A Tag Fuse, NH1, 500V
  • RS Stock No. 251-3464
  • Mfr. Part No. 1SCA022627R4310
1 Box of 3
MYR324.48
Schneider Electric, PowerPact MCCB 4P 100A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 346-819
  • Mfr. Part No. BJF46100
Each
MYR9,467.14
Better World
ABB System Pro M Compact S200 MCB, 1P, 50A Curve B, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7551
  • Mfr. Part No. 2CDS251001R0505 S201-B50
Each
MYR103.94
Schneider Electric RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Resi9 Range
  • RS Stock No. 335-282
  • Mfr. Part No. R9D87806
Each
MYR518.23
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 341-494
  • Mfr. Part No. C100H45AFM
Each
MYR76,938.57
Better World
ABB System Pro M Compact S200 MCB, 1+N, 40A Curve D
  • RS Stock No. 237-3207
  • Mfr. Part No. 2CDS251103R0401
Each
MYR619.83
20A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 262-745
  • Mfr. Part No. 36TDQSJ20
Each
MYR1,529.98
Schneider Electric Cross Elbow Busbar Trunking, 290 → 1200mm, 1000A, Canalis Series
  • RS Stock No. 335-109
  • Mfr. Part No. KSA1000DMBK41F
Each
MYR22,649.09
Siemens SIRIUS 3 Phase Busbar Protector, 690V
  • RS Stock No. 755-2971
  • Mfr. Part No. 3RV2925-5EB
Each
MYR162.20
Siemens 5SV43 RCCB, 63A, 4 Pole, 30mA, Type AC, 400V
  • RS Stock No. 328-514
  • Mfr. Part No. 5SV4346-0MB
Each
MYR1,852.24
Littelfuse 32mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8057
  • Mfr. Part No. 0218.032MXP
Each (In a Bag of 10)
MYR7.97
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 55 kA
  • RS Stock No. 209-6834
  • Mfr. Part No. 3VA1150-5GF46-0AA0
Each
MYR2,857.13
Allen Bradley 140MT Extension Terminal for use with Contactor
  • RS Stock No. 273-2300
  • Mfr. Part No. 140MT-C-PSC23
Each
MYR60.06
Siemens SENTRON Trip Alarm Switch for use with Circuit Breaker 3VA27
  • RS Stock No. 265-593
  • Mfr. Part No. 3VW9727-0AB13
Each
MYR463.33
1
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