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

46578 Products showing for Fuses & Circuit Breakers

300 / 999+
Temporarily out of stock
Better World
Siemens SENTRON 5SL MCB, 2P, 2A Curve D
  • RS Stock No. 232-2268
  • Mfr. Part No. 5SL4202-8
Each
MYR611.59
Temporarily out of stock
Eaton xEffect MCB, 3P, 50A Curve B, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 240-257
  • Mfr. Part No. 174523 AZ-3N-B50
Each
MYR2,596.40
In Stock
ABB Busbar Cover, 690V
  • RS Stock No. 445-0689
  • Mfr. Part No. 1SAM201908R1001 BS1-3
Each
MYR8.16
Temporarily out of stock
ABB EV1122 Busbar
  • RS Stock No. 202-036
  • Mfr. Part No. 1STQ001017A0000
Each
MYR3,752.69
In Stock
ABB F200 RCCB, 40A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 231-9901
  • Mfr. Part No. 2CSF204101R1400 F204 A-40/0,03
Each
MYR1,133.69
In Stock
Better World
Schneider Electric 100 → 415 V ac, 110 → 130V dc Shunt Trip Circuit Trip for use with ARA, ic60 MCB, IDPN
  • RS Stock No. 791-2815
  • Mfr. Part No. A9A26946
Each
MYR476.99
Temporarily out of stock
Siemens 63A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 203-2132
  • Mfr. Part No. 3NA6822-6
Each (In a Pack of 3)
MYR248.613
Temporarily out of stock
Eaton Eaton xEffect XNH Connection Kit for use with 2/4 Pole NH Fuse Switch, NH00 → 3
  • RS Stock No. 127-230
  • Mfr. Part No. 182999 XNH-XLINK
Each
MYR160.49
In Stock
ETI 20A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-670
  • Mfr. Part No. 2312406
Each (In a Pack of 5)
MYR7.182
In Stock
ETI 2A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-818
  • Mfr. Part No. 2311401
Each (In a Pack of 5)
MYR5.784
In Stock
RS PRO MCB, 1P, 2A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0198
Each
MYR53.83
Temporarily out of stock
Eaton 30A Fuse Holder for 10 x 38mm Fuse, 2P, 690V
  • RS Stock No. 263-148
  • Mfr. Part No. CHM2DIU
1 Pack of 6
MYR561.48
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3688
  • Mfr. Part No. 1SDA071661R1
Each
MYR49,157.91
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-110
  • Mfr. Part No. 3VA2140-5JP32-0AA0
Each
MYR7,227.32
In Stock
Siemens 50A NH Fuse, NH00, 500V ac
  • RS Stock No. 397-367
  • Mfr. Part No. 3NA3820-7
Each (In a Pack of 3)
MYR37.77
In Stock
Eaton 7.5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 848-2936
  • Mfr. Part No. AGC-7-1-2-R
Each
MYR7.87
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3P, 1.6A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 204-367
  • Mfr. Part No. 2CDS273001R0971
Each
MYR2,273.56
In Stock
Mersen Surge Protector, 50kA, 200V (Volts), DIN Rail Mount
  • RS Stock No. 361-618
  • Mfr. Part No. 44120405
Each
MYR1,993.28
In Stock
Eaton 100mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 852-7411
  • Mfr. Part No. GDC-100MA
Each (In a Pack of 5)
MYR47.58
In Stock
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 774-0106
Each
MYR15.98
1
300
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