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

310 / 999+
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-620
  • Mfr. Part No. 3VA5140-4ED31-0AA0
Each
MYR1,929.58
Temporarily out of stock
ABB SACE Emax 2 Fixed Part for use with Circuit Breaker
  • RS Stock No. 231-9318
  • Mfr. Part No. 1SDA073912R1 E2.2 W FP Iu=2500 4p HR
Each
MYR14,626.36
Temporarily out of stock
RS PRO SMD Non-Resettable Surface Mount Fuse 12A, 24V
  • RS Stock No. 252-2189
Each (On a Tape of 4000)
MYR0.684
In Stock
Hager 6A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 250-8598
  • Mfr. Part No. LF306M
Each (In a Pack of 10)
MYR15.194
In Stock
Better World
Siemens SENTRON 5SY7 MCB, 2P, 16A Curve C, 400V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 209-6041
  • Mfr. Part No. 5SY7216-7
Each
MYR430.80
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 4A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3158
  • Mfr. Part No. A9F53104
Each
MYR304.37
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 4A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3338
  • Mfr. Part No. A9F54204
Each
MYR391.50
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 8A Curve B, 277V AC
  • RS Stock No. 256-6753
  • Mfr. Part No. M9F21208
Each
MYR537.02
In Stock
Eaton xEffect MCB, 1P, 25A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4429
  • Mfr. Part No. 239024 FAZ6-B25/1
Each
MYR163.91
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 4A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8898
  • Mfr. Part No. 5SY6504-7
Each
MYR347.36
In Stock
Littelfuse 0.35A Resettable Fuse, 16V dc
  • RS Stock No. 657-1766
  • Mfr. Part No. NANOSMDC035F
Each (In a Pack of 10)
MYR2.159
In Stock
Mersen 315A German Standard Fuse, 31, 700V, 101.6mm
  • RS Stock No. 304-2445
  • Mfr. Part No. K300021
Each
MYR889.77
In Stock
Allen Bradley 140MT Link Module for use with Motor Protection Circuit Breakers
  • RS Stock No. 273-2297
  • Mfr. Part No. 140MT-C-PEC23
Each
MYR90.30
In Stock
Mersen 25A NH Fuse, NH000, 500V ac
  • RS Stock No. 136-0576
  • Mfr. Part No. E201185C / NH000GG50V25/3
Each
MYR33.64
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 210-1749
  • Mfr. Part No. 3VA5160-6ED31-0AA0
Each
MYR1,944.42
Temporarily out of stock
ABB, Tmax MCCB 3P 1.25kA, Fixed Mount
  • RS Stock No. 237-6001
  • Mfr. Part No. 1SDA062038R1 T7D-M 1250A FF
Each
MYR17,041.71
In Stock
ABB 20A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9959
  • Mfr. Part No. OFAF000H20 1SCA022627R0740
Each
MYR29.63
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 1+N, 40A Curve B
  • RS Stock No. 237-3208
  • Mfr. Part No. 2CDS251103R0405
Each
MYR475.58
Temporarily out of stock
Eaton RCBO, 16A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type C, FRBmM Range
  • RS Stock No. 123-671
  • Mfr. Part No. 170832 FRBMM-C16/2/01-LIA
Each
MYR752.47
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 232-0086
  • Mfr. Part No. 1SDA054333R1 T5S400 FF PR221-LS 400A
Each
MYR8,437.39
1
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