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

46580 Products showing for Fuses & Circuit Breakers

13 / 999+
In Stock
RS PRO 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1563
Each (In a Pack of 10)
MYR11.605
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 3A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2805
  • Mfr. Part No. 2909909
Each
MYR223.87
Limited stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2125
  • Mfr. Part No. 5SY4316-7
Each
MYR464.81
In Stock
ETA Thermal Circuit Breaker - 1410-L Single Pole 250V Voltage Rating PCB Mount, 630mA Current Rating
  • RS Stock No. 409-750
  • Mfr. Part No. 1410-L210-L2F1-S02-0.63A
Each
MYR62.65
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 6A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3556
  • Mfr. Part No. A9F55306
Each
MYR997.17
In Stock
Mersen 20A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4376
  • Mfr. Part No. ATQR20
Each
MYR109.36
In Stock
Eaton 5A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 458-8526
  • Mfr. Part No. KTK-5
Each (In a Pack of 5)
MYR47.054
In Stock
SIBA 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3292
  • Mfr. Part No. 70-007-65/1A
Each (In a Pack of 10)
MYR1.448
In Stock
Littelfuse 70A Tan Blade Car Fuse, 32V dc
  • RS Stock No. 219-3609
  • Mfr. Part No. 0299070.TXN
Each (In a Pack of 10)
MYR11.21
In Stock
ABB Surge Protector, DIN Rail Mount
  • RS Stock No. 136-3878
  • Mfr. Part No. 1SNA198729R0100
Each (In a Pack of 5)
MYR6.054
In Stock
RS PRO 200A British Standard Fuse, A4, 415V ac, 93.7mm
  • RS Stock No. 521-2731
Each
MYR221.95
In Stock
Hager NGT MCB, 1+N, 32A, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4800
  • Mfr. Part No. NGT732
Each
MYR658.48
New product - Preorder today
Schneider Electric Acti9 iID RCCB, 100A, 4 Pole, 30mA, Type A, 380 → 415V ac
  • RS Stock No. 654-690
  • Mfr. Part No. A9R21491
Each
MYR3,961.19
In Stock
ABB F200 RCCB, 25A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 537-7355
  • Mfr. Part No. 2CSF202001R1250 F202 AC-25/0,03
Each
MYR939.60
Limited stock
Eaton 10A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-0966
  • Mfr. Part No. S500-10-R
Each (In a Pack of 10)
MYR1.056
In Stock
Phoenix Contact Thermal Circuit Breaker - TCP 6A Single Pole 65 V dc, 250V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 801-6918
  • Mfr. Part No. 0712275
Each
MYR85.07
In Stock
Eaton 12A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8380
  • Mfr. Part No. C10G12
Each (In a Pack of 10)
MYR7.418
In Stock
SIBA 500mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3286
  • Mfr. Part No. 70-007-65/0.5A
Each (In a Pack of 10)
MYR1.772
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 50A, Breaking Capacity 25kA, Fixed Mount
  • RS Stock No. 260-9715
  • Mfr. Part No. LV510304
Each
MYR1,589.31
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 10A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 383-2024
  • Mfr. Part No. 5SY4110-7
Each
MYR123.32
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