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

28 of 999+
In Stock
RS PRO 2.5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 721-1591
Each (In a Pack of 10)
R 22.831(exc. VAT)
Temporarily out of stock
Eaton 30A Panel Mount Fuse Holder for 10 x 38mm Fuse, 1P, 600V ac
  • RS stock no. 852-7556
  • Mfr. Part No. HPG
Each
R 349.33(exc. VAT)
In Stock
SIBA 3.15A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 418-9551
  • Mfr. Part No. 70-059-61/3.15A
Each (In a Pack of 10)
R 14.532(exc. VAT)
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 20 kA, Fixed Mount
  • RS stock no. 232-0085
  • Mfr. Part No. 1SDA054325R1 T5N400 FF PR221-LS 400A
Each
R 39,086.39(exc. VAT)
In Stock
SIBA 2.5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 783-3359
  • Mfr. Part No. 70-059-60/2.5A
Each (In a Pack of 10)
R 13.364(exc. VAT)
In Stock
Eaton Handle, Lockable for use with N(S)2(-4) Series, NZM2(-4) Switch, PN2(-4) Series
  • RS stock no. 537-5719
  • Mfr. Part No. 260174 NZM2-XTVDV
Each
R 2,460.77(exc. VAT)
In Stock
SIBA 6.3A F Glass Cartridge Fuse, 5 x 30mm
  • RS stock no. 361-8216
  • Mfr. Part No. 171530.6,3
Each (In a Pack of 10)
R 45.632(exc. VAT)
In Stock
RS PRO 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 668-5979
Each (In a Pack of 10)
R 7.554(exc. VAT)
In Stock
SIBA 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 783-3383
  • Mfr. Part No. 70-059-60/10A
Each (In a Pack of 10)
R 13.613(exc. VAT)
In Stock
ABB 36 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS stock no. 811-1903
  • Mfr. Part No. 1SL1206A00 65P12X32
Each
R 2,763.92(exc. VAT)
In Stock
Schneider Electric R9PR RCCB, 63A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 276-8972
  • Mfr. Part No. R9PRA263
Each
R 1,907.89(exc. VAT)
In Stock
RS PRO 7.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3433
Each (In a Pack of 10)
R 9.351(exc. VAT)
In Stock
ETI 10A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS stock no. 413-658
  • Mfr. Part No. 2312404
Each (In a Pack of 5)
R 24.268(exc. VAT)
In Stock
Eaton 250A Centred Tag Fuse, NH2, 690V ac
  • RS stock no. 182-1719
  • Mfr. Part No. 250NHG2B-690
Each
R 557.77(exc. VAT)
Temporarily out of stock
Eaton 20A Yellow Automotive Car Fuse, 32V dc No
  • RS stock no. 848-2567
  • Mfr. Part No. ATC-20
Each
R 14.49(exc. VAT)
In Stock
RS PRO 1.25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 769-6330
Each (In a Pack of 10)
R 20.871(exc. VAT)
In Stock
SIBA 2.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 418-9545
  • Mfr. Part No. 70-059-61/2.5A
Each (In a Pack of 10)
R 14.529(exc. VAT)
Temporarily out of stock
ABB Surge Arrester, 20kA
  • RS stock no. 246-2248
  • Mfr. Part No. 2CCF606000R0001
Each
R 7,019.49(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 4A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS stock no. 772-1284
  • Mfr. Part No. 5SY4204-8
Each
R 1,662.51(exc. VAT)
In Stock
SIBA 160A Centred Tag Fuse, NH1, 500V ac
  • RS stock no. 421-772
  • Mfr. Part No. 20-003-13/160A
Each
R 273.19(exc. VAT)
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