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

46579 Products showing for Fuses & Circuit Breakers

95 / 999+
In Stock
Better World
Schneider Electric RCD, 6A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8640
  • Mfr. Part No. EZ9D16806
Each
MYR163.60
In Stock
Eaton 3A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-560
  • Mfr. Part No. TDC180-3A
Each (In a Pack of 10)
MYR3.635
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-730
  • Mfr. Part No. 3VA5110-1MH31-0AA0
Each
MYR3,203.12
In Stock
Better World
Siemens Surge Protector, 24 → 48 V ac, 24 → 70V dc, Clip-On Mount
  • RS Stock No. 875-1080
  • Mfr. Part No. 3RT2936-1BB00
Each
MYR83.40
In Stock
Mersen 5A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0552
  • Mfr. Part No. ATQR5
Each (In a Box of 10)
MYR122.872
In Stock
Littelfuse 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4511
  • Mfr. Part No. 0218004.MXP
Each (In a Pack of 10)
MYR3.464
In Stock
RS PRO HBC Fuse Kit
  • RS Stock No. 611-8983
Each
MYR741.73
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 5A, 125V ac/dc
  • RS Stock No. 878-1754
  • Mfr. Part No. 0273005.H
Each
MYR39.49
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
Littelfuse SMD Non Resettable Fuse 2A, 125V
  • RS Stock No. 787-4328
  • Mfr. Part No. 0449002.MR
Each (In a Pack of 5)
MYR10.83
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 80A, Fixed Mount
  • RS Stock No. 254-6323
  • Mfr. Part No. C11N3TM080L
Each
MYR2,768.04
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 80A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7827
  • Mfr. Part No. LV426576
Each
MYR3,564.49
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 80A, Fixed Mount
  • RS Stock No. 254-6315
  • Mfr. Part No. C11F3TM080L
Each
MYR2,463.27
In Stock
Eaton xEffect MCB, 1P, 2A Curve D, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7027
  • Mfr. Part No. 278572 FAZ-D2/1
Each
MYR153.49
In Stock
Littelfuse SMD Non Resettable Fuse 1.5A, 125V
  • RS Stock No. 738-2986
  • Mfr. Part No. 045201.5MRL
Each (In a Pack of 10)
MYR7.098
In Stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 2A Current Rating
  • RS Stock No. 335-996
  • Mfr. Part No. 106-P30-000040-2A
Each
MYR135.56
In Stock
ABB 35A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9965
  • Mfr. Part No. OFAF000H35 1SCA022627R1040
Each
MYR29.57
Temporarily out of stock
Eaton 200A British Standard Fuse, B2, 415V ac, 111mm
  • RS Stock No. 156-8715
  • Mfr. Part No. DD200M250
Each
MYR209.30
Temporarily out of stock
ABB S800S MCB, 3P, 25A Curve D, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-641
  • Mfr. Part No. 2CCS863001R0251
Each
MYR1,744.19
In Stock
Littelfuse 5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4549
  • Mfr. Part No. 0216005.MXP
Each (In a Pack of 10)
MYR4.011
1
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