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

19 of 999+
In Stock
Better World
Schneider Electric Multi 9 MCB, 2P, 10A Curve C, 10 kA Breaking Capacity
  • RS stock no. 219-9126
  • Mfr. Part No. M9F22210
Each
R 1,972.96(exc. VAT)
In Stock
RS PRO 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-592
Each (In a Pack of 10)
R 8.519(exc. VAT)
In Stock
Hager MJT MCB, 2P, 16A Curve C, 240 → 400V AC, 6 kA Breaking Capacity
  • RS stock no. 144-4950
  • Mfr. Part No. MJT716
Each
R 643.85(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 500mA Current Rating
  • RS stock no. 336-028
  • Mfr. Part No. 106-P30-000040-0.5A
Each
R 367.96(exc. VAT)
In Stock
Hager CDS RCD Switch, 40A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 251-2032
  • Mfr. Part No. CDS743F
Each
R 2,967.34(exc. VAT)
In Stock
Phoenix Contact Busbar, 6.2mm Pitch
  • RS stock no. 627-3406
  • Mfr. Part No. 3030271
Each (In a Pack of 5)
R 99.39(exc. VAT)
In Stock
RS PRO Earthing Clamp Tool Steel
  • RS stock no. 426-3148
Each
R 182.52(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W28 Single Pole 32 V dc, 250V ac Voltage Rating, 3A Current Rating
  • RS stock no. 782-0911
  • Mfr. Part No. W28-XQ1A-3
Each
R 103.87(exc. VAT)
In Stock
Siemens 3 Phase Surge Protector, 100kA, DIN Rail Mount
  • RS stock no. 211-0181
  • Mfr. Part No. 5SD7414-1
Each
R 23,259.29(exc. VAT)
Temporarily out of stock
Siemens SENTRON Door Feedthrough Accessory for use with 3VF8, Circuit Breaker 3VF7
  • RS stock no. 265-533
  • Mfr. Part No. 8UC7414-1BB44
Each
R 4,971.18(exc. VAT)
In Stock
Littelfuse 60A Inline Fuse Holder for Maxi Fuse, 32V dc
  • RS stock no. 787-4388
  • Mfr. Part No. MAHC0001ZXJ
Each
R 557.10(exc. VAT)
In Stock
Siemens 80A NH Fuse, NH1, 500V ac
  • RS stock no. 397-597
  • Mfr. Part No. 3NA3124
Each (In a Pack of 3)
R 285.24(exc. VAT)
In Stock
Littelfuse 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4410
  • Mfr. Part No. 0217002.MXP
Each (In a Pack of 10)
R 8.049(exc. VAT)
Temporarily out of stock
Schneider Electric Multifix Cover for use with Circuit Breaker
  • RS stock no. 275-8813
  • Mfr. Part No. LVS03220
1 Box of 5
R 1,570.72(exc. VAT)
Temporarily out of stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 690V ac
  • RS stock no. 189-5336
  • Mfr. Part No. E1062696 / CMC103
Each
R 485.22(exc. VAT)
In Stock
Eaton 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1638
  • Mfr. Part No. S506-250-R
Each (In a Pack of 10)
R 10.171(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 RCD, 6A
  • RS stock no. 219-9025
  • Mfr. Part No. A9N26946
Each
R 1,934.41(exc. VAT)
In Stock
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS stock no. 563-447
Each (In a Pack of 10)
R 14.122(exc. VAT)
In Stock
SIBA 160A NH Fuse, NH00, 690V
  • RS stock no. 893-8562
  • Mfr. Part No. 20-209-08/160A
Each (In a Pack of 3)
R 508.703(exc. VAT)
Temporarily out of stock
Eaton PKPM2 RCCB, 10A, 2 Pole, 30mA, Type B, 230V
  • RS stock no. 232-022
  • Mfr. Part No. 108105 PKPM2-10/2/B/003-A
Each
R 4,662.35(exc. VAT)
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