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

46578 Products showing for Fuses & Circuit Breakers

216 / 999+
In Stock
Better World
Schneider Electric PowerPact Distribution Board, 630 A
  • RS Stock No. 247-2139
  • Mfr. Part No. MG64M
Each
MYR12,320.93
In Stock
ABB Tmax T Motor Operator for use with MCCB
  • RS Stock No. 232-0112
  • Mfr. Part No. 1SDA054894R1 MOE 24VDC T4-5
Each
MYR9,561.44
In Stock
RS PRO 7.5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 563-576
Each (In a Pack of 10)
MYR3.366
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 25 kA
  • RS Stock No. 209-6829
  • Mfr. Part No. 3VA1150-3EF32-0AA0
Each
MYR1,629.40
In Stock
Wickmann Fuse Holder Battery Clamp
  • RS Stock No. 342-0205
  • Mfr. Part No. 255.1000.0001
Each
MYR144.24
Temporarily out of stock
Phoenix Contact 3 Phase Surge Protector, 40kA, 1200V (Volts), DIN Rail Mount
  • RS Stock No. 131-478
  • Mfr. Part No. 2910353
Each
MYR1,487.18
In Stock
ABB Tmax XT Rotary Handle for use with Circuit Breaker
  • RS Stock No. 236-6853
  • Mfr. Part No. 1SDA069053R1 RHD XT2-XT4 F/P STAND
Each
MYR582.14
Temporarily out of stock
Schneider Electric Acti9 A9F04 Circuit Breaker, 3P, 6A Curve C, 500V AC, 6000 A Breaking Capacity
  • RS Stock No. 655-490
  • Mfr. Part No. A9F04306
Each
MYR759.71
In Stock
Mersen 3A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0529
  • Mfr. Part No. HP10M3
Each (In a Box of 10)
MYR64.216
In Stock
Hager RCCB, 63A, 4 Pole, 30mA
  • RS Stock No. 144-4890
  • Mfr. Part No. CDC863F
Each
MYR2,593.48
In Stock
Eaton 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 849-5661
  • Mfr. Part No. HTB-24M-R
Each
MYR69.79
Temporarily out of stock
Better World
Siemens Sentron 5SY4 MCB, 4P, 16A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3198
  • Mfr. Part No. 5SY4416-8
Each
MYR905.20
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 4P, 63A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2382
  • Mfr. Part No. M9F22463
Each
MYR1,236.98
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7716
  • Mfr. Part No. 2CDS252001R0164 S202-C16
Each
MYR403.91
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-980
  • Mfr. Part No. 3VA5215-7EF41-2AA0
Each
MYR12,495.85
Temporarily out of stock
Better World
Schneider Electric ComPact NSX, Easy Pact CVS Fixing Screws for use with ComPact NSX 400/640, Easy Pact CVS 400/630
  • RS Stock No. 219-9406
  • Mfr. Part No. LV432552
Each
MYR93.73
In Stock
Legrand 10A F Ceramic Cartridge Fuse, 8.5 x 23mm
  • RS Stock No. 167-4337
  • Mfr. Part No. 0 114 10
Each (In a Pack of 10)
MYR12.535
In Stock
SIBA 2.5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 783-3359
  • Mfr. Part No. 70-059-60/2.5A
Each (In a Pack of 10)
MYR1.802
Temporarily out of stock
Wickmann SMD Non Resettable Fuse, 125V ac/dc
  • RS Stock No. 174-0712
  • Mfr. Part No. 0251.250MRT1L
Each (In a Pack of 10)
MYR4.841
Temporarily out of stock
Eaton xEffect MCB, 1+N, 40A Curve C
  • RS Stock No. 230-0978
  • Mfr. Part No. 239082 FAZ6-C40/1N
Each
MYR252.15
1
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