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
RS PRO 20A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS stock no. 237-5263
Each
R 92.45(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
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
Eaton 400A Centred Tag Fuse, NH2, 690V
  • RS stock no. 182-1765
  • Mfr. Part No. 170M5808D
Each
R 6,925.54(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)
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)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS stock no. 769-3340
  • Mfr. Part No. SS-5-3-15A-BK
Each (In a Pack of 5)
R 16.834(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)
Temporarily out of stock
Eaton 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 849-5541
  • Mfr. Part No. GDC-2A
Each
R 29.10(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)
Temporarily out of stock
RS PRO 5A Inline Fuse Holder for 5x20mm Fuse, 250V
  • RS stock no. 284-6487
Each (In a Pack of 10)
R 46.619(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)
In Stock
Eaton 45A Centred Tag Fuse, 600V
  • RS stock no. 854-9008
  • Mfr. Part No. LPJ-45SP
Each
R 1,669.72(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 200A, Fixed Mount
  • RS stock no. 260-7865
  • Mfr. Part No. C25B3TM200
Each
R 29,517.42(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)
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