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

23 of 999+
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 MCCB 3P 250A, Breaking Capacity 80 kA, Fixed Mount
  • RS stock no. 628-8105
  • Mfr. Part No. 266007 PN2-250
1 Box of 1
R 15,175.96(exc. VAT)
In Stock
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 2A Current Rating
  • RS stock no. 333-243
  • Mfr. Part No. 201-2A
Each
R 977.94(exc. VAT)
In Stock
SIBA Surface Mount Fuse Clip for 10 x 38mm
  • RS stock no. 247-4071
  • Mfr. Part No. 10X38CLIPS
Each
R 73.02(exc. VAT)
In Stock
Rittal Earth Bar L. 450mm x W. 15mm x H. 5mm
  • RS stock no. 826-2868
  • Mfr. Part No. 7113000
Each
R 1,026.00(exc. VAT)
In Stock
Eaton 1A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 458-8504
  • Mfr. Part No. KTK-1
Each (In a Pack of 5)
R 316.488(exc. VAT)
In Stock
Littelfuse 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4533
  • Mfr. Part No. 0218010.MXP
Each (In a Pack of 10)
R 32.827(exc. VAT)
In Stock
Littelfuse 160A Grey, White Fuse Strips Car Fuse, 48V dc
  • RS stock no. 226-0917
  • Mfr. Part No. 157.5701.6161
Each
R 175.12(exc. VAT)
In Stock
Schurter Thermal Circuit Breaker - T12 Single Pole 240V ac Voltage Rating, 16A Current Rating
  • RS stock no. 284-6123
  • Mfr. Part No. 4410.0152
Each
R 467.76(exc. VAT)
In Stock
SIBA 10A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 418-9618
  • Mfr. Part No. 70-059-61/10A
Each (In a Pack of 10)
R 14.529(exc. VAT)
Last RS stock
Eaton 50A Red Blade Car Fuse, 32V dc
  • RS stock no. 849-5579
  • Mfr. Part No. MAX-50
Each
R 198.71(exc. VAT)
In Stock
Littelfuse 2A Resettable Fuse, 15V dc
  • RS stock no. 895-1640
  • Mfr. Part No. 2920L200DR
Each (In a Pack of 10)
R 15.266(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)
In Stock
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS stock no. 246-5128
  • Mfr. Part No. 3RV1915-1AB
Each
R 211.15(exc. VAT)
In Stock
Mersen 40A British Standard Fuse, 17 x 49mm, 690V, 61 → 65.5mm
  • RS stock no. 238-3997
  • Mfr. Part No. C220963
Each
R 884.14(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 1P, 6A, Type Z, 277V AC
  • RS stock no. 256-6790
  • Mfr. Part No. M9F44106
Each
R 3,226.22(exc. VAT)
In Stock
Schurter 800mA F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 269-3872
  • Mfr. Part No. 8020.5067
Each
R 15.26(exc. VAT)
In Stock
Eaton 63A Bolted Tag Fuse, 250 V dc, 500V ac, 111mm
  • RS stock no. 181-8706
  • Mfr. Part No. BD63
Each
R 294.88(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 1.6A, 250V
  • RS stock no. 767-5147
Each (In a Pack of 10)
R 5.769(exc. VAT)
In Stock
Schurter SMD Non Resettable Fuse 630mA, 125V ac/dc
  • RS stock no. 777-7511
  • Mfr. Part No. 3404.0008.11
Each
R 17.30(exc. VAT)
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