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

108 / 999+
In Stock
Schneider Electric, ComPacT NSX MCCB 3P 100A, Fixed Mount
  • RS Stock No. 254-6269
  • Mfr. Part No. C1032D100
Each
MYR2,190.45
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 4P, 16A Curve D, 277V AC
  • RS Stock No. 256-6775
  • Mfr. Part No. M9F23416
Each
MYR1,253.05
In Stock
ABB System Pro M Compact S200M MCB, 1P, 32A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4188
  • Mfr. Part No. 2CDS271001R0324 S201M-C32
Each
MYR116.34
In Stock
ETA Thermal Circuit Breaker - 1616 Single Pole 32V Voltage Rating, 15A Current Rating
  • RS Stock No. 729-2732
  • Mfr. Part No. 1616-21-15A
Each
MYR69.10
In Stock
ABB Tmax T Handle, Lockable for use with Circuit Breaker
  • RS Stock No. 232-0115
  • Mfr. Part No. 1SDA054926R1 RHD F-P T4-5
Each
MYR1,048.54
In Stock
Better World
Siemens Sentron for use with 3VA Series Circuit Breaker
  • RS Stock No. 874-4540
  • Mfr. Part No. 3VA9988-0BL33
Each
MYR815.86
In Stock
Siemens 224A NH Fuse, NH1, 500V ac
  • RS Stock No. 397-581
  • Mfr. Part No. 3NA3142
Each (In a Pack of 3)
MYR113.887
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 10A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0210
  • Mfr. Part No. 2CDS253001R0427 S203-K10
Each
MYR570.31
In Stock
Hager MJT MCB, 2P, 10A Curve C, 240 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4949
  • Mfr. Part No. MJT710
Each
MYR158.38
In Stock
RS PRO 20A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-4656
Each
MYR51.54
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4858
  • Mfr. Part No. 3VA2580-7HL32-0AA0
Each
MYR17,817.58
Limited stock
Legrand HX 1 Phase Busbar, 400V, 17.7mm Pitch
  • RS Stock No. 731-9433
  • Mfr. Part No. 4 049 26
Each
MYR47.08
Temporarily out of stock
RS PRO HBC Fuse Kit
  • RS Stock No. 267-1856
1 Kit
MYR821.56
In Stock
Phoenix Contact CLIPLINE Thermal Circuit Breaker - UT 6-TMC Single Pole 250V Voltage Rating DIN Rail Mount, 12A
  • RS Stock No. 684-3617
  • Mfr. Part No. 0916611
Each
MYR111.23
In Stock
Eaton 4A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4150
  • Mfr. Part No. LP-CC-4
Each
MYR305.55
Temporarily out of stock
Allen Bradley 140G Cover Frame for use with MCCBs
  • RS Stock No. 255-1632
  • Mfr. Part No. 140G-G2C3-C50
Each
MYR1,197.37
In Stock
Lovato ModuLo P1MB MCB, 1P, 10A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5598
  • Mfr. Part No. P1MB1PC10
Each
MYR95.35
In Stock
Better World
ABB, XT3N MCCB 4P 250A, Fixed Mount
  • RS Stock No. 236-6581
  • Mfr. Part No. 1SDA068066R1 XT3N 250 TMD 250A 3P+N FF
Each
MYR6,019.21
Temporarily out of stock
Phoenix Contact 3 Phase Surge Protector, 30kA, 4000V (Volts), DIN Rail Mount
  • RS Stock No. 131-209
  • Mfr. Part No. 2910385
Each
MYR870.99
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 260-9432
  • Mfr. Part No. C10F3TM040
Each
MYR3,006.62
1
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