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

2275 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3728
  • Mfr. Part No. 3VA2040-5HM46-0AA0
Each
MYR7,250.98
Temporarily out of stock
Siemens Alpha Mounting Plate for use with Unequipped Distribution Boards
  • RS Stock No. 212-9059
  • Mfr. Part No. 8GK4451-2KK32
Each
MYR908.10
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4555
  • Mfr. Part No. 3VA2125-7HL46-0AA0
Each
MYR5,687.13
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9868
  • Mfr. Part No. 3VA1125-6ED36-0AA0
Each
MYR1,547.50
In Stock
Bourns 0.75A Resettable Fuse, 30V
  • RS Stock No. 245-9181P
  • Mfr. Part No. MF-MSHT075KX-2
Each (Supplied on a Reel)
MYR4.731
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-3317
  • Mfr. Part No. 1SDA071225R1
Each
MYR133,720.89
Temporarily out of stock
Lovato MCB, 3P, 32A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1662
  • Mfr. Part No. P1MBUH3PC32
Each
MYR993.53
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-3439
  • Mfr. Part No. 1SDA071382R1
Each
MYR30,898.04
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4049
  • Mfr. Part No. 3VA2116-0HL32-0AA0
Each
MYR8,126.35
Temporarily out of stock
Siemens SENTRON Assembly Kit for use with 3VA2 100/160/250
  • RS Stock No. 210-3519
  • Mfr. Part No. 3VA9203-0QA00
Each
MYR186.63
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4112
  • Mfr. Part No. 3VA2116-7KP46-0AA0
Each
MYR16,728.41
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-3999
  • Mfr. Part No. 1SDA072059R1
Each
MYR33,576.50
Temporarily out of stock
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7648
  • Mfr. Part No. 5TT4455-0
Each
MYR539.66
Temporarily out of stock
Eaton 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 171-6774
  • Mfr. Part No. S505H-V-1-25-R
Each (In a Pack of 5)
MYR3.108
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4126
  • Mfr. Part No. 3VA2116-8HM46-0AA0
Each
MYR11,809.98
Temporarily out of stock
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4838
  • Mfr. Part No. 3VA2580-5HM42-0AA0
Each
MYR29,453.49
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 4 channels
  • RS Stock No. 259-3735
  • Mfr. Part No. 1SDA071710R1
Each
MYR96,457.57
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-8032
  • Mfr. Part No. C25W32D250
Each
MYR15,582.78
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9703
  • Mfr. Part No. 3VA11123GD420AA0
Each
MYR4,033.39
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3631
  • Mfr. Part No. 3VA2025-5HM42-0AA0
Each
MYR6,969.99
1
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