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

113 / 999+
In Stock
Better World
Schneider Electric 6A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 211-2283
  • Mfr. Part No. DF2CA06
Each (In a Pack of 10)
MYR41.258
In Stock
Eaton xEffect MCB, 2P, 4A Curve C, 240 → 415V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 847-3361
  • Mfr. Part No. 278752 FAZ-C4/2
Each
MYR604.01
Temporarily out of stock
Lovato P1RD MCCB, 63A, 4 Pole, 30mA, Type A, 230 or 400V ac
  • RS Stock No. 276-5672
  • Mfr. Part No. P1RD4P63A030
Each
MYR2,420.73
In Stock
Siemens 100A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 203-2011
  • Mfr. Part No. 3NA7830
Each (In a Pack of 3)
MYR39.28
In Stock
Littelfuse 630mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4476
  • Mfr. Part No. 0216.630MXP
Each (In a Pack of 10)
MYR5.008
Limited stock
Schneider Electric Thermal Circuit Breaker - GB2 1P + N Pole 250V ac Voltage Rating DIN Rail Mount, 500mA Current Rating
  • RS Stock No. 323-8983
  • Mfr. Part No. GB2CD05
Each
MYR254.36
In Stock
Schneider Electric Surge Arrester, 40kA, 460V ac, Clip-On Mount
  • RS Stock No. 288-7109
  • Mfr. Part No. A9L40321
Each
MYR4,404.69
In Stock
Phoenix Contact Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 768-1192
  • Mfr. Part No. 2762265
Each
MYR1,311.48
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7766
  • Mfr. Part No. 2CDS253001R0164 S203-C16
Each
MYR401.51
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 30A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-572
  • Mfr. Part No. 3VA5130-5EC31-1AA0
Each
MYR2,045.38
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 40A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6100
  • Mfr. Part No. A9P22740
Each
MYR1,451.52
In Stock
Littelfuse 0.75A Resettable Fuse, 24V dc
  • RS Stock No. 867-5261
  • Mfr. Part No. MINISMDC075F/24-2
Each (In a Bag of 10)
MYR2.624
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 2A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3238
  • Mfr. Part No. A9F84202
Each
MYR415.27
Currently unavailable
Littelfuse 0.12A Resettable Fuse, 60V dc
  • RS Stock No. 869-7416
  • Mfr. Part No. TRF250-120
Each (In a Bag of 10)
MYR3.376
In Stock
Littelfuse 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 769-0152
  • Mfr. Part No. 03455LF1H
Each (In a Pack of 5)
MYR23.454
Temporarily out of stock
ABB MCCB 3P 160A, Breaking Capacity 25 kA
  • RS Stock No. 192-0818
  • Mfr. Part No. 1SDA067399R1
Each
MYR3,320.45
In Stock
Europa 3 Phase Distribution Board, 12 Way, 125 A
  • RS Stock No. 849-6406
  • Mfr. Part No. TPN04
Each
MYR1,488.89
In Stock
Better World
Schneider Electric PowerPact Distribution Board, 18 Way, 800 A
  • RS Stock No. 247-2145
  • Mfr. Part No. MGPCM18R
Each
MYR9,848.83
In Stock
Mersen 2A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 230-3519
  • Mfr. Part No. Y219234
Each (In a Pack of 10)
MYR18.202
In Stock
Hager RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 251-2020
  • Mfr. Part No. ADC810F
Each
MYR1,417.13
1
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