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

330 / 999+
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 1.6A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-822
  • Mfr. Part No. 2CDS274061R0257
Each
MYR4,239.16
In Stock
Better World
Siemens 5SV4444 RCCB, 40A, 4 Pole, 100mA, Type AC, 400V ac
  • RS Stock No. 231-8396
  • Mfr. Part No. 5SV4444-0
Each
MYR695.75
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-6569
  • Mfr. Part No. 1SDA068046R1 DCL EKIP G-LS/I IN=160A XT
Each
MYR3,820.16
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3P, 1.6A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 204-367
  • Mfr. Part No. 2CDS273001R0971
Each
MYR2,273.56
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 25A Curve D, 400V AC
  • RS Stock No. 246-2530
  • Mfr. Part No. 2CCS571103R8251
Each
MYR483.51
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 10A Curve D, 400V AC
  • RS Stock No. 238-3383
  • Mfr. Part No. A9P32310
Each
MYR799.05
In Stock
Nidec Components 1.1A Resettable Fuse, 30V
  • RS Stock No. 637-6410
  • Mfr. Part No. PRCP-R110-0-99
Each (In a Pack of 5)
MYR3.72
Temporarily out of stock
Schneider Electric TransferPacT Electronic Circuit Breaker 160A TA160, Fixed
  • RS Stock No. 272-7585
  • Mfr. Part No. TA16D3S1604TPE
Each
MYR13,124.40
Temporarily out of stock
Schneider Electric PowerPact H Nut for use with Circuit Breaker
  • RS Stock No. 438-924
  • Mfr. Part No. S37430
1 Pack of 2
MYR414.34
Temporarily out of stock
ABB S800S MCB, 4P, 16A Curve D, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 141-268
  • Mfr. Part No. 2CCS864001R0161
Each
MYR2,264.40
In Stock
ABB System Pro M Compact SU200M MCB, 2P, 6A Curve C, 440V AC, 440V DC, 15 kA Breaking Capacity
  • RS Stock No. 231-9738
  • Mfr. Part No. 2CDS272337R0064 SU202M-C6
1 Box of 1
MYR689.38
Temporarily out of stock
Schneider Electric Acti9 Acti9 iC60 MCB, 2P, 25A, Type AC, 500V AC, 300 mA Breaking Capacity
  • RS Stock No. 347-124
  • Mfr. Part No. A9Q04225
Each
MYR2,028.34
Temporarily out of stock
Siemens SENTRON Cover for use with Compact Busbar System
  • RS Stock No. 265-562
  • Mfr. Part No. 8US1922-2CB02
1 Pack of 2
MYR485.42
Limited stock
Bourns 0.1A Resettable Fuse, 60V
  • RS Stock No. 647-8415
  • Mfr. Part No. MF-R010
Each (In a Pack of 10)
MYR2.138
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA
  • RS Stock No. 209-6905
  • Mfr. Part No. 3VA2063-6KP42-0AA0
Each
MYR8,171.19
Temporarily out of stock
Better World
Siemens RCBO, 16A Current Rating, 1P Poles, 10mA Trip Sensitivity, SENTRON Range
  • RS Stock No. 202-7111
  • Mfr. Part No. 5SU1154-6KK16
Each
MYR921.42
In Stock
NEMIQ Earthing Strap Copper
  • RS Stock No. 283-7538
  • Mfr. Part No. JF 10-150 M6
Each
MYR30.16
In Stock
Littelfuse 315mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4325
  • Mfr. Part No. 0217.315MXP
Each (In a Pack of 10)
MYR3.696
In Stock
Eaton 20A Bolt In Mount 6.3 x 32mm Fuse Block, 300V ac/dc
  • RS Stock No. 852-7229
  • Mfr. Part No. S-8202-1-R
Each
MYR12.60
In Stock
Socomec 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 690V ac
  • RS Stock No. 122-5260
  • Mfr. Part No. 57010018
Each (In a Pack of 4)
MYR142.538
1
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