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

20 of 999+
Temporarily out of stock
Schneider Electric MCCB Molded Case Circuit Breaker 3P 400A
  • RS stock no. 339-341
  • Mfr. Part No. SLA3000M
Each
R 30,646.35(exc. VAT)
In Stock
Eaton 40A Bolted Tag Fuse, 500 V dc, 690V ac, 63.5mm
  • RS stock no. 182-1701
  • Mfr. Part No. 40ET
Each
R 447.34(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
Omron Busbar
  • RS stock no. 111-3531
  • Mfr. Part No. PYDN-7.75-020R
Each
R 25.52(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)
In Stock
Eaton 10A gG/gL Cartridge Fuse, 10 x 38mm
  • RS stock no. 229-176
  • Mfr. Part No. C10G10 CYLINDRICAL FUSE 10 x 38 10A GG 500V AC
1 Pack of 10
R 176.21(exc. VAT)
In Stock
Eaton 1.5A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 191-9521
  • Mfr. Part No. BK-ABC-1-1-2-R
Each (In a Bag of 5)
R 34.412(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)
In Stock
ABB System Pro M Compact S200 MCB, 1P, 10A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 488-6836
  • Mfr. Part No. 2CDS251001R0104 - S201C10
Each
R 430.02(exc. VAT)
In Stock
Schneider Electric R9E RCCB, 63A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 276-8941
  • Mfr. Part No. R9ERA263
Each
R 1,864.23(exc. VAT)
In Stock
Littelfuse 250mA F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 541-4319
  • Mfr. Part No. 0217.250MXP
Each (In a Pack of 10)
R 22.683(exc. VAT)
In Stock
Eaton 250A Rail Mount Fuse Holder for NH1 Fuse, 1P, 690V ac
  • RS stock no. 182-1805
  • Mfr. Part No. SD1-D-PV
Each
R 1,004.78(exc. VAT)
Temporarily out of stock
Schurter 1.6A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 173-8054
  • Mfr. Part No. 8020.5013.G
1 Box of 1000
R 11,337.62(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 6A T Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 854-8890
  • Mfr. Part No. FNQ-R-6
Each
R 1,322.96(exc. VAT)
Temporarily out of stock
RS PRO Three Phase Industrial Surge Protector, 50kA, 1.25kV, DIN Rail Mount
  • RS stock no. 101-736
Each
R 2,235.15(exc. VAT)
In Stock
Better World
Schneider Electric ComPact NSX Snap In Nut for use with Compact NSX 160/250
  • RS stock no. 219-9368
  • Mfr. Part No. LV430554
Each
R 1,221.04(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti 9 Range
  • RS stock no. 790-9213
  • Mfr. Part No. A9D31820
Each
R 3,809.60(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 1P, 16A Curve C, 15 kA Breaking Capacity
  • RS stock no. 219-9266
  • Mfr. Part No. A9F94116
Each
R 1,301.99(exc. VAT)
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