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

46580 Products showing for Fuses & Circuit Breakers

85 / 999+
In Stock
ABB System Pro M Compact S200M MCB, 3P, 32A Curve C, 440V AC, 12V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4318
  • Mfr. Part No. 2CDS273001R0324 S203M-C32
Each
MYR294.34
In Stock
Hager 3 Phase Busbar
  • RS Stock No. 144-4833
  • Mfr. Part No. KBN663A
Each
MYR167.33
In Stock
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 50A Current Rating
  • RS Stock No. 782-0882
  • Mfr. Part No. W23-X1A1G-50
Each
MYR204.35
In Stock
Better World
ABB System Pro M Compact S200M MCB, 1P, 16A Curve K, 253V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 231-9697
  • Mfr. Part No. 2CDS271001R0467 S201M K 16A - 15 KA
1 Box of 1
MYR178.27
In Stock
Schurter 10A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3869
  • Mfr. Part No. 8020.5021
Each
MYR5.85
In Stock
Eaton 3.15A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1414
  • Mfr. Part No. S501-3.15-R
Each (In a Pack of 10)
MYR1.978
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 80A, Breaking Capacity 25kA
  • RS Stock No. 260-9726
  • Mfr. Part No. LV510316
Each
MYR3,706.00
Being discontinued
RS PRO 3A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6048
Each (In a Pack of 10)
MYR1.826
In Stock
Littelfuse 5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 787-4108
  • Mfr. Part No. 0287005.PXCN
Each (In a Pack of 10)
MYR1.67
Temporarily out of stock
ABB S800PV MCB, 4P, 40A Curve B, 1500V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5947
  • Mfr. Part No. 2CCF019628R0001 S804PV-SP40 - 5 kA
Each
MYR2,586.11
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1680
  • Mfr. Part No. 3VA1180-5EF46-0AA0
Each
MYR3,001.99
In Stock
Schurter 20A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 712-4787
  • Mfr. Part No. 0090.0020
Each
MYR62.62
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 25A, Breaking Capacity 25kA
  • RS Stock No. 260-9720
  • Mfr. Part No. LV510311
Each
MYR2,634.49
In Stock
Schurter 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7904
  • Mfr. Part No. 0001.1007
Each (In a Pack of 10)
MYR2.603
Temporarily out of stock
WJ Furse Earth Rod
  • RS Stock No. 153-2966
  • Mfr. Part No. 7TCA083120R0011 RB005
Each (In a Pack of 10)
MYR151.337
In Stock
Eaton 2A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 851-0801
  • Mfr. Part No. FNQ-R-2
Each
MYR125.46
In Stock
SIBA Surface Mount Fuse Clip for 10 x 38mm
  • RS Stock No. 247-4071
  • Mfr. Part No. 10X38CLIPS
Each
MYR22.65
In Stock
SIBA 1.6A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3305
  • Mfr. Part No. 70-007-65/1.6A
Each (In a Pack of 10)
MYR1.535
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 80A, Fixed Mount
  • RS Stock No. 260-9418
  • Mfr. Part No. C10B4TM080
Each
MYR4,003.11
In Stock
Wickmann 10A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0671
  • Mfr. Part No. 0313010.MX250P
Each (In a Pack of 10)
MYR4.604
1
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