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

50690 Products showing for Fuses & Circuit Breakers

4 of 999+
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS stock no. 232-0095
  • Mfr Part No. 1SDA054437R1 T5N400 FF TMA 400A
Each
R 27,650.50(exc. VAT)
In Stock
RS PRO 32A British Standard Fuse, A2, 550V ac, 73mm
  • RS stock no. 521-2624
Each (In a Pack of 5)
R 121.394(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY6 MCB, 1P, 20A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS stock no. 489-6524
  • Mfr Part No. 5SY6120-7
Each
R 453.33(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 25 kA, Fixed Mount
  • RS stock no. 209-4908
  • Mfr Part No. 3VA1116-3EE32-0AA0
Each
R 15,268.90(exc. VAT)
Temporarily out of stock
Siemens RCCB, 25A, 2 Pole, 30mA, Type F, 230V
  • RS stock no. 269-9754
  • Mfr Part No. 5SV3322-3KK60
Each
R 14,750.23(exc. VAT)
In Stock
Eaton 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 852-6923
  • Mfr Part No. HTB-34M-R
Each
R 35.35(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W54 Single Pole 250V ac Voltage Rating, 20A Current Rating
  • RS stock no. 782-7988
  • Mfr Part No. W54-XB1A4A10-20
Each
R 97.05(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 16A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9150
  • Mfr Part No. A9F77316
Each
R 1,356.42(exc. VAT)
Being discontinued
RS PRO 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-706
Each (In a Pack of 10)
R 1.337(exc. VAT)
Temporarily out of stock
Eaton 160A Tag Fuse, 31 x 110mm, 415V, 82mm
  • RS stock no. 240-192
  • Mfr Part No. 160MJ30-7 160A 415V AC TYPE J F/PILLAR FUSE
1 Pack of 10
R 5,776.52(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 3A Current Rating
  • RS stock no. 782-8029
  • Mfr Part No. W58-XB1A4A-3
Each
R 272.66(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY6 MCB, 1P, 6A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 489-6625
  • Mfr Part No. 5SY6106-7
Each
R 418.00(exc. VAT)
In Stock
Eaton 160A Centred Tag Fuse, NH00, 500V ac
  • RS stock no. 703-8664
  • Mfr Part No. 160NHG00B
Each
R 178.53(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 5A Current Rating
  • RS stock no. 782-8026
  • Mfr Part No. W58-XC4C12A-5
Each
R 192.83(exc. VAT)
In Stock
Eaton xPole MCB, 2P, 10A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS stock no. 864-4358
  • Mfr Part No. 242401 PLSM-C10/2-MW
Each
R 1,566.45(exc. VAT)
In Stock
ETA ESX10 Electronic Circuit Breaker 6A 24V ESX10-T, 1 channels , DIN Rail Mount
  • RS stock no. 210-2140
  • Mfr Part No. ESX10-TB-102-DC24V-6A-E
Each
R 2,097.78(exc. VAT)
Being discontinued
RS PRO 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-429
Each (In a Pack of 10)
R 5.584(exc. VAT)
Limited stock
ETA Thermal Circuit Breaker - 1616 Single Pole 32V Voltage Rating, 30A Current Rating
  • RS stock no. 729-2748
  • Mfr Part No. 1616-21-30A
Each
R 275.80(exc. VAT)
In Stock
RS PRO 16A Rail Mount Fuse Holder, 600V ac
  • RS stock no. 501-809
Each (In a Pack of 10)
R 99.007(exc. VAT)
In Stock
Eaton 315A Centred Tag Fuse, NH2, 500V ac
  • RS stock no. 703-8746
  • Mfr Part No. 315NHG2B
Each
R 443.74(exc. VAT)
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