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

49110 Products showing for Fuses & Circuit Breakers

96 of 999+
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 4P, 20A Curve D, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2407
  • Mfr. Part No. M9F23420
Each
SGD202.15(exc. GST)
In Stock
Eaton xPole PXL, S200 MCB, 1P, 6A Curve B, 400V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 486-952
  • Mfr. Part No. 236027 PXL-B6/1
Each
SGD23.42(exc. GST)
In Stock
Schurter 315mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7667
  • Mfr. Part No. 0034.1511
Each (In a Pack of 10)
SGD0.887(exc. GST)
In Stock
Better World
Schneider Electric Easypact Cvs400...630, Nsx400...630 Dc, Powerpact Multistandard Front Plate for use with Compact Nsx
  • RS Stock No. 221-1256
  • Mfr. Part No. LV432558
Each
SGD88.33(exc. GST)
Temporarily out of stock
Schneider Electric Auxiliary Contact for use with ComPact NS630b → 1600 Series Circuit Breaker
  • RS Stock No. 247-1871
  • Mfr. Part No. 33800
Each
SGD112.87(exc. GST)
In Stock
Littelfuse TR5 Series Thermoplastic PCB Mount Fuse Holder Cover for 8.5 x 8mm Fuse
  • RS Stock No. 769-0177
  • Mfr. Part No. 57500000001
Each (In a Pack of 10)
SGD0.776(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 6A Curve D, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 527-9453
  • Mfr. Part No. 2CDS251001R0061 S201-D6
Each
SGD33.31(exc. GST)
In Stock
Schneider Electric Auxiliary Contact for use with ComPact
  • RS Stock No. 276-8778
  • Mfr. Part No. LV429273
Each
SGD75.70(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-4308
  • Mfr. Part No. 1SDA072453R1
Each
SGD18,173.60(exc. GST)
In Stock
RS PRO 12.5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9305
Each (In a Pack of 10)
SGD3.603(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 3P, 63A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4352
  • Mfr. Part No. 2CDS273001R0634 S203M-C63
Each
SGD107.03(exc. GST)
Temporarily out of stock
Siemens 1.25kA Fuse Holder for 153mm Fuse, 1P, 1.25kV
  • RS Stock No. 608-664
  • Mfr. Part No. 3NH5463
1 Pack of 3
SGD181.21(exc. GST)
Last RS stock
Siemens 63A NH Fuse, NH000, 500V ac
  • RS Stock No. 396-067
  • Mfr. Part No. 3NA3822
Each (In a Pack of 3)
SGD34.463(exc. GST)
Temporarily out of stock
Hager Hager HMD Circuit Breaker, 2P, 80A Curve D, 415V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-778
  • Mfr. Part No. HMD280
Each
SGD605.52(exc. GST)
In Stock
RS PRO 3.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8132
Each (In a Pack of 20)
SGD0.627(exc. GST)
In Stock
Littelfuse 80mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4268
  • Mfr. Part No. 0217.080MXP
Each (In a Pack of 10)
SGD0.964(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 272-0191
  • Mfr. Part No. 3VA1580-6MH32-0AA0
Each
SGD4,288.53(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 272-0188
  • Mfr. Part No. 3VA1580-6EF32-0BH0
Each
SGD4,567.62(exc. GST)
Temporarily out of stock
Eaton 6A Bolted Tag Fuse, 1.2kV, 124mm
  • RS Stock No. 181-8630
  • Mfr. Part No. TAC6
Each
SGD78.71(exc. GST)
In Stock
Siemens SIRIUS 3 Phase Busbar, 500V ac
  • RS Stock No. 755-2952
  • Mfr. Part No. 3RV2917-1A
Each
SGD62.80(exc. GST)
1
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