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

8 of 999+
In Stock
Siemens ALPHA Busbar
  • RS stock no. 226-0831
  • Mfr Part No. 8GK9733-0KK10
Each
R 910.09(exc. VAT)
Temporarily out of stock
Better World
Siemens, Sentron Circuit breaker 3P 150A, DIN Rail Mount
  • RS stock no. 196-3581
  • Mfr Part No. 3VA61701MS310AA0
Each
R 11,346.51(exc. VAT)
In Stock
Eaton 6A Centred Tag Fuse, NH000, 500V ac
  • RS stock no. 703-8611
  • Mfr Part No. 6NHG000B
Each
R 117.21(exc. VAT)
In Stock
Littelfuse 20A Yellow Blade Car Fuse, 32V dc
  • RS stock no. 337-4023
  • Mfr Part No. 0299020.TXN
Each (In a Pack of 10)
R 53.937(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 250V ac Voltage Rating, 30A Current Rating
  • RS stock no. 782-8016
  • Mfr Part No. W54-XB1A4A10-30
Each
R 120.44(exc. VAT)
In Stock
Eaton 500mA F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 848-2722
  • Mfr Part No. AGC-1/2-R
Each
R 57.18(exc. VAT)
In Stock
Eaton 45A Centred Tag Fuse, 600V
  • RS stock no. 854-9008
  • Mfr Part No. LPJ-45SP
Each
R 1,669.72(exc. VAT)
In Stock
RS PRO 5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 611-0282
Each (In a Pack of 10)
R 28.187(exc. VAT)
In Stock
ABB System Pro M Compact S200M MCB, 1P, 20A Curve B, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 535-6005
  • Mfr Part No. 2CDS271001R0205 S201M-B20
Each
R 471.62(exc. VAT)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS stock no. 611-0383
Each (In a Pack of 10)
R 27.531(exc. VAT)
In Stock
RS PRO 5A Tan Blade Car Fuse, 32V dc
  • RS stock no. 563-536
Each (In a Pack of 10)
R 14.122(exc. VAT)
In Stock
Allen Bradley 1492 1492-SPM MCB Mini Circuit Breaker, 1P, 6A Curve B, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS stock no. 125-1421
  • Mfr Part No. 1492-SPM1B060
Each
R 436.68(exc. VAT)
Temporarily out of stock
Siemens 4A Centred Tag Fuse, NH000, 690V
  • RS stock no. 210-6902
  • Mfr Part No. 3NA3804-6
Each (In a Pack of 3)
R 662.283(exc. VAT)
In Stock
Littelfuse 4A Resettable Fuse, 60V
  • RS stock no. 712-7509
  • Mfr Part No. RKEF400
Each (In a Pack of 10)
R 17.755(exc. VAT)
Temporarily out of stock
Eaton Eaton Distribution Parts 1 Phase Busbar, 415V, 17.8mm Pitch
  • RS stock no. 259-043
  • Mfr Part No. 270339 Z-GV-10/1P-1TE
Each
R 423.71(exc. VAT)
In Stock
Mersen Rail Mount Fuse Holder
  • RS stock no. 806-8423
  • Mfr Part No. Z233725-RS
Each (In a Pack of 12)
R 14.765(exc. VAT)
In Stock
Littelfuse 250A Pink Bolt Down Car Fuse, 32V dc
  • RS stock no. 787-4417
  • Mfr Part No. 0298250.ZXEH
Each
R 126.45(exc. VAT)
Temporarily out of stock
Siemens 3 Phase Surge Protector, 25kA, DIN Rail Mount
  • RS stock no. 211-0187
  • Mfr Part No. 5SD7443-1
Each
R 21,543.53(exc. VAT)
In Stock
RS PRO 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3506
Each (In a Pack of 10)
R 8.555(exc. VAT)
Temporarily out of stock
Better World
Siemens 5sV3 RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS stock no. 211-9633
  • Mfr Part No. 5SV3316-6
Each
R 5,141.84(exc. VAT)
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