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

31 of 999+
In Stock
Littelfuse 100A Yellow Bolt Down Car Fuse, 32V dc
  • RS stock no. 787-4397P
  • Mfr. Part No. 0298100.ZXEH
Each (Supplied in a Bag)
R 118.24(exc. VAT)
In Stock
Wickmann 35A Green Blade Car Fuse, 32V dc
  • RS stock no. 174-0720
  • Mfr. Part No. 0287035.PXCN
Each (In a Pack of 50)
R 6.074(exc. VAT)
In Stock
Eaton, xEnergy MCCB 3P 250A, Breaking Capacity 50 kA, Fixed Mount
  • RS stock no. 537-5589
  • Mfr. Part No. 259124 NZMN2-VE250
Each
R 23,936.72(exc. VAT)
Temporarily out of stock
Better World
ABB, Protecta MCCB 3P 250A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS stock no. 831-9179
  • Mfr. Part No. 1SDA068058R1 XT3N 250 TMD 200-2000 3p F F
Each
R 11,082.31(exc. VAT)
In Stock
Schurter 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 269-3863
  • Mfr. Part No. 8020.0603
Each
R 15.95(exc. VAT)
In Stock
ABB 160A Centred Tag Fuse, NH00, 500V
  • RS stock no. 779-9980
  • Mfr. Part No. OFAF00H160 1SCA022627R1710
Each
R 182.87(exc. VAT)
In Stock
Better World
Siemens 5SV3 RCCB, 25A, 2 Pole, 30mA, Type A
  • RS stock no. 124-7727
  • Mfr. Part No. 5SV3312-6
Each
R 3,412.40(exc. VAT)
In Stock
RS PRO 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 277-3923
Each (In a Bag of 1000)
R 14.897(exc. VAT)
In Stock
RS PRO MCB, 2P, 32A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS stock no. 265-0184
Each
R 507.67(exc. VAT)
In Stock
Littelfuse 1.1A Resettable Fuse, 33V dc
  • RS stock no. 787-4255
  • Mfr. Part No. 1812L110/33MR
Each (In a Pack of 10)
R 7.987(exc. VAT)
Currently unavailable
RS PRO 12.5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 182-4034
Each (In a Pack of 5)
R 65.938(exc. VAT)
In Stock
Schneider Electric TransferPacT Electronic Circuit Breaker 63A TA100, Fixed
  • RS stock no. 272-7579
  • Mfr. Part No. TA10D2S0633TPE
Each
R 29,467.80(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric iID RCD, 40A, 100mA
  • RS stock no. 776-3691
  • Mfr. Part No. A9R12240
Each
R 5,115.55(exc. VAT)
In Stock
Eaton 125A Bolted Tag Fuse, LET, 150 V dc, 240V ac, 41mm
  • RS stock no. 182-1407
  • Mfr. Part No. 125LET
Each (In a Box of 10)
R 419.42(exc. VAT)
In Stock
Littelfuse 2A M Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 769-0026
  • Mfr. Part No. 0234002.MXP
Each (In a Pack of 25)
R 21.933(exc. VAT)
In Stock
Littelfuse 3A Purple Blade Car Fuse, 32V dc
  • RS stock no. 787-4148
  • Mfr. Part No. 0297003.WXNV
Each (In a Pack of 10)
R 5.452(exc. VAT)
Temporarily out of stock
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS stock no. 232-0270
  • Mfr. Part No. 1SDA068092R1 XT4N 250 TMA 250A FF
Each
R 15,714.42(exc. VAT)
In Stock
SIBA 100A Ceramic Cartridge Fuse, 22 x 58mm
  • RS stock no. 893-8509
  • Mfr. Part No. 50-140-06/100A
Each
R 787.19(exc. VAT)
In Stock
Hager NFN MCB, 1P, 3A, 230V AC, 10 kA Breaking Capacity
  • RS stock no. 602-156
  • Mfr. Part No. NFN103
Each
R 1,208.70(exc. VAT)
In Stock
RS PRO 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 177-8129
Each (In a Pack of 20)
R 16.592(exc. VAT)
1
31
2535
Results per page

Related links