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
Fuses - PCB
Fuses - PCB

50687 Products showing for Fuses & Circuit Breakers

39 of 999+
In Stock
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 3A Current Rating
  • RS stock no. 284-5833
  • Mfr. Part No. 4400.001
Each
R 215.05(exc. VAT)
In Stock
Eaton 32A British Standard Fuse, A2, 660V ac, 73mm
  • RS stock no. 414-689
  • Mfr. Part No. TIA32M63
Each (In a Pack of 5)
R 304.772(exc. VAT)
In Stock
Schurter 30A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 173-7971
  • Mfr. Part No. 0090.0030
Each (In a Box of 10)
R 406.91(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 630A, Breaking Capacity 70 kA, Fixed Mount
  • RS stock no. 272-0175
  • Mfr. Part No. 3VA1563-6EF42-0AA0
Each
R 52,749.00(exc. VAT)
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 3P, 10A Curve C, 6 kA Breaking Capacity
  • RS stock no. 203-2184
  • Mfr. Part No. 5SY6310-7
Each
R 1,836.06(exc. VAT)
In Stock
SIBA 50A Ceramic Cartridge Fuse, 22 x 58mm
  • RS stock no. 893-8521
  • Mfr. Part No. 50-140-06/50A
Each
R 580.17(exc. VAT)
Temporarily out of stock
ABB, T6S MCCB 3P 630A, Fixed Mount
  • RS stock no. 237-5991
  • Mfr. Part No. 1SDA060236R1 T6S630 FF PR221-LS/I 630A
Each
R 46,852.09(exc. VAT)
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA, Fixed Mount
  • RS stock no. 232-0216
  • Mfr. Part No. 1SDA066807R1 XT1B 160 TMD 100A FF
Each
R 5,042.00(exc. VAT)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS stock no. 769-3375
  • Mfr. Part No. SS-5F-1A-BK
Each (In a Pack of 5)
R 22.046(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 3.15A, 250V
  • RS stock no. 767-5125
Each (In a Pack of 10)
R 12.24(exc. VAT)
In Stock
Eaton 160A Fuse Holder for NH00, NH000 Fuse, 3P, 440 V ac/dc, 690 V ac/dc
  • RS stock no. 127-223
  • Mfr. Part No. 183037 XNH00-FCL-S160-BT1
Each
R 2,659.75(exc. VAT)
Temporarily out of stock
ABB S802C MCB, 2P, 63A Curve B, 415V AC, 25 kA Breaking Capacity
  • RS stock no. 140-538
  • Mfr. Part No. 2CCS882001R0635
Each
R 2,780.23(exc. VAT)
Temporarily out of stock
ABB Tmax T Motor Operator for use with Circuit Breaker
  • RS stock no. 232-0151
  • Mfr. Part No. 1SDA062116R1 T7M-X1 220-250V AC/DC
Each
R 19,034.46(exc. VAT)
In Stock
Bourns 30A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 254-4175
  • Mfr. Part No. PF-HC1-30
Each
R 371.13(exc. VAT)
In Stock
Littelfuse 5A T Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 876-8442
  • Mfr. Part No. KLDR005.TXP
Each
R 922.47(exc. VAT)
Currently unavailable
Schneider Electric Acti 9 IC60N MCB, 2P, 16A Curve C
  • RS stock no. 209-1313
  • Mfr. Part No. A9F79216
Each
R 1,971.51(exc. VAT)
In Stock
Schurter PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS stock no. 284-5300
  • Mfr. Part No. 0034.6612
Each (In a Pack of 10)
R 8.527(exc. VAT)
In Stock
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 169-9401
  • Mfr. Part No. S500-2-R
1 Bag of 1000
R 3,623.42(exc. VAT)
In Stock
Murrelektronik Limited Mico Pro Distribution Block for use with Circuit Breaker
  • RS stock no. 284-8052
  • Mfr. Part No. 9000-41000-0000212
Each
R 1,054.58(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 10A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS stock no. 772-1363
  • Mfr. Part No. 5SY4310-6
Each
R 1,064.30(exc. VAT)
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