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

27 of 999+
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS stock no. 260-8125
  • Mfr. Part No. C40N32D400
Each
R 61,712.49(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
Littelfuse 200A Base Mount Fuse Holder for BF1 Fuse, 32V dc
  • RS stock no. 548-9183
  • Mfr. Part No. 04980900ZXT
Each
R 222.98(exc. VAT)
In Stock
Eaton 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS stock no. 489-4578
  • Mfr. Part No. CHM1DU
Each
R 135.25(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 50 kA, Fixed Mount
  • RS stock no. 655-144
  • Mfr. Part No. C080N320FM
Each
R 65,912.08(exc. VAT)
Unavailable
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 3P 150A, Fixed Mount
  • RS stock no. 221-1045
  • Mfr. Part No. LV433502
Each
R 44,485.96(exc. VAT)
In Stock
Schurter Surface Mount Fuse 2A, 250V ac
  • RS stock no. 270-7940
  • Mfr. Part No. 3403.0169.11
Each
R 15.90(exc. VAT)
In Stock
Eaton 100A Bolted Tag Fuse, B1, 350 V dc, 660V ac, 111mm
  • RS stock no. 182-1665
  • Mfr. Part No. TC100
Each
R 1,263.85(exc. VAT)
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS stock no. 231-9329
  • Mfr. Part No. 1SDA100347R1 XT5N 630 TMA 630-6300 3pFF
Each
R 31,315.66(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 5A, 32V
  • RS stock no. 787-4230
  • Mfr. Part No. 0466005.NR
Each (In a Pack of 5)
R 11.536(exc. VAT)
In Stock
Littelfuse 20A Inline Fuse Holder for ATO Fuse, 32V dc
  • RS stock no. 787-4356
  • Mfr. Part No. FHAC0001ZXJG
Each
R 107.93(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)
Being discontinued
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-621
Each (In a Pack of 10)
R 6.486(exc. VAT)
Temporarily out of stock
Siemens SENTRON Closing Coil
  • RS stock no. 277-0722
  • Mfr. Part No. 3WA9111-0AD15
Each
R 4,820.04(exc. VAT)
In Stock
SIBA 1A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 783-3343
  • Mfr. Part No. 70-059-60/1A
Each (In a Pack of 10)
R 7.503(exc. VAT)
In Stock
Siemens 315A NH Fuse, NH2, 500V ac
  • RS stock no. 395-563
  • Mfr. Part No. 3NA3252
1 Pack of 3
R 1,344.47(exc. VAT)
In Stock
Eaton 350A British Standard Fuse, FM, 690 V ac, 500V dc, 80 → 85mm
  • RS stock no. 156-9112
  • Mfr. Part No. 350FM
Each
R 3,749.46(exc. VAT)
Unavailable
Schneider Electric, NSX MCCB 3P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS stock no. 219-8409
  • Mfr. Part No. LV438218
Each
R 18,846.43(exc. VAT)
In Stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)1, NZM1
  • RS stock no. 259-654
  • Mfr. Part No. 271449 NZM1-XTVDVR-NA
Each
R 2,515.70(exc. VAT)
Currently unavailable
Schneider Electric Resi9 R9F MCB, 2P, 16A Curve C
  • RS stock no. 223-7566
  • Mfr. Part No. R9F32216
Each
R 364.92(exc. VAT)
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