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

46579 Products showing for Fuses & Circuit Breakers

94 / 999+
In Stock
RS PRO 35A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3657
Each
MYR88.99
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX630
  • RS Stock No. 212-061
  • Mfr. Part No. C6347A570
Each
MYR23,652.94
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 32A Curve K, 15 kA Breaking Capacity
  • RS Stock No. 219-9303
  • Mfr. Part No. A9F95232
Each
MYR1,201.79
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
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 16A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6089
  • Mfr. Part No. A9P22616
Each
MYR234.04
In Stock
Schneider Electric A9R1 RCCB, 100A, 4 Pole, 300mA, Type AC, 415V ac
  • RS Stock No. 276-9127
  • Mfr. Part No. A9R14491
Each
MYR3,337.49
In Stock
Mersen 63A NH Fuse, NH000, 500V ac
  • RS Stock No. 270-3102
  • Mfr. Part No. R212466
Each (In a Box of 3)
MYR48.613
In Stock
Phoenix Contact CLIPLINE Thermal Circuit Breaker - UT 6-TMC Single Pole 250V Voltage Rating DIN Rail Mount, 12A
  • RS Stock No. 684-3617
  • Mfr. Part No. 0916611
Each
MYR111.23
In Stock
Mersen 3A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4398
  • Mfr. Part No. ATMR3
Each
MYR115.36
In Stock
Socomec 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 1P, 690V
  • RS Stock No. 233-3331
  • Mfr. Part No. 57025011
Each (In a Pack of 6)
MYR166.913
In Stock
Legrand 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 266-3104
  • Mfr. Part No. 013410
1 Box of 10
MYR285.04
In Stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 80A Curve C, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3064
  • Mfr. Part No. A9N18365
Each
MYR532.93
Temporarily out of stock
Better World
Schneider Electric Acti 9 C120N MCB, 2P, 100A Curve C, 440V AC, 250V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3058
  • Mfr. Part No. A9N18362
Each
MYR434.82
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 32A Curve C, 400V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7722
  • Mfr. Part No. 2CDS252001R0324 S202-C32
Each
MYR164.88
In Stock
Schurter 125mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-0353
  • Mfr. Part No. 0034.1507
Each (In a Pack of 50)
MYR3.614
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 40A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2377
  • Mfr. Part No. M9F22340
Each
MYR289.12
Limited stock
SIBA 630mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3223
  • Mfr. Part No. 70-007-33/0.63A
Each (In a Pack of 10)
MYR1.554
In Stock
Eaton 110A Bolted Tag Fuse, 500 V dc, 690V ac, 71mm
  • RS Stock No. 182-1807
  • Mfr. Part No. 110EET
Each
MYR264.31
In Stock
Schurter 160mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 777-7479
  • Mfr. Part No. 0034.3109
Each (In a Pack of 10)
MYR3.557
Temporarily out of stock
Siemens SIRIUS 3 Phase Busbar, 690V, 55mm Pitch
  • RS Stock No. 246-5207
  • Mfr. Part No. 3RV1935-1C
Each
MYR237.09
1
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