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

54 of 999+
In Stock
  • RS stock no. 122-5261
  • Mfr. Part No. 57010020
Each (In a Pack of 6)
R 380.027(exc. VAT)
In Stock
  • RS stock no. 219-3564
  • Mfr. Part No. 0299030.TXN
Each (In a Pack of 10)
R 60.968(exc. VAT)
Temporarily out of stock
  • RS stock no. 257-248
  • Mfr. Part No. 3VA5445-6EF41-0AA0
Each
R 55,835.19(exc. VAT)
In Stock
  • RS stock no. 528-983
Each
R 520.56(exc. VAT)
Temporarily out of stock
  • RS stock no. 179-3082
  • Mfr. Part No. 83120168 / STPT12-5K1000V-YPVM
Each
R 6,788.69(exc. VAT)
In Stock
  • RS stock no. 396-308
  • Mfr. Part No. 5SB251
Each (In a Pack of 5)
R 29.608(exc. VAT)
Temporarily out of stock
Better World
  • RS stock no. 776-3477
  • Mfr. Part No. A9F77163
Each
R 319.18(exc. VAT)
In Stock
  • RS stock no. 541-3366
  • Mfr. Part No. 0451.750HL
Each (In a Pack of 10)
R 5.481(exc. VAT)
In Stock
  • RS stock no. 806-8423
  • Mfr. Part No. Z233725-RS
Each (In a Pack of 12)
R 14.765(exc. VAT)
In Stock
  • RS stock no. 265-0183
Each
R 511.12(exc. VAT)
Being discontinued
  • RS stock no. 563-554
Each (In a Pack of 10)
R 6.811(exc. VAT)
Temporarily out of stock
  • RS stock no. 210-6959
  • Mfr. Part No. 3NE1230-2
Each (In a Pack of 3)
R 6,856.60(exc. VAT)
In Stock
Better World
  • RS stock no. 221-1273
  • Mfr. Part No. LV432631
Each
R 968.19(exc. VAT)
In Stock
  • RS stock no. 181-8677
  • Mfr. Part No. CEO40
Each
R 773.52(exc. VAT)
In Stock
  • RS stock no. 417-357
  • Mfr. Part No. C3030
Each (In a Pack of 5)
R 50.864(exc. VAT)
Temporarily out of stock
Better World
  • RS stock no. 236-6799
  • Mfr. Part No. 1SDA068540R1 XT4H 250 Ekip I 250A FF
Each
R 26,479.67(exc. VAT)
In Stock
  • RS stock no. 270-7966
  • Mfr. Part No. 3413.0121.22
Each
R 14.22(exc. VAT)
In Stock
Better World
  • RS stock no. 514-0096
  • Mfr. Part No. 2CDS251001R0277 S201-K2
Each
R 714.62(exc. VAT)
In Stock
  • RS stock no. 738-3276
  • Mfr. Part No. 0468001.NR
Each (In a Pack of 10)
R 25.793(exc. VAT)
Limited stock
  • RS stock no. 124-5062
  • Mfr. Part No. A8-5AF
Each (In a Pack of 5)
R 22.122(exc. VAT)
Results per page