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

260 / 999+
Temporarily out of stock
Eaton 100A Cartridge Fuse, 25 x 110mm
  • RS Stock No. 228-864
  • Mfr. Part No. CEO100
1 Pack of 10
MYR2,169.48
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels
  • RS Stock No. 156-658
  • Mfr. Part No. 3VA2225-5JP32-0AA0
Each
MYR11,737.59
Temporarily out of stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 2P, 125A Curve B
  • RS Stock No. 219-8284
  • Mfr. Part No. A9N18415
Each
MYR1,784.23
Temporarily out of stock
Schneider Electric, PowerPact MCCB 1P 100A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 346-803
  • Mfr. Part No. BJF16100
Each
MYR4,117.68
In Stock
Mersen 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 230-3496
  • Mfr. Part No. X216151
Each (In a Pack of 10)
MYR8.004
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1.25kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-998
  • Mfr. Part No. C125N450FM
Each
MYR36,167.51
In Stock
Eaton 6A gG/gL Cartridge Fuse, 14 x 51mm
  • RS Stock No. 229-111
  • Mfr. Part No. C14G6
1 Pack of 10
MYR110.11
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 800mA, 250V ac
  • RS Stock No. 169-9538
  • Mfr. Part No. SS-5-800MA-BK
Each (In a Bag of 200)
MYR4.519
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 40A Curve K
  • RS Stock No. 225-6007
  • Mfr. Part No. 2CDS254001R0557 S204 K 40A - 10 KA
Each
MYR1,052.56
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 40A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-618
  • Mfr. Part No. 3VA5140-4ED21-0AA0
Each
MYR1,780.75
Being discontinued
RS PRO 400mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-615
Each (In a Pack of 10)
MYR2.194
Unavailable
Schneider Electric ComPact Trip Unit for use with Compact NSX 160/250 circuit breakers
  • RS Stock No. 221-1067
  • Mfr. Part No. LV433881
Each
MYR16,314.29
Temporarily out of stock
Phoenix Contact 6.3A Base Mount Fuse Holder for 5 x 20mm Fuse, 1P, 60V dc
  • RS Stock No. 207-2666
  • Mfr. Part No. 1054762
Each
MYR82.99
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 32A Curve D, 400V AC, 60V DC, 30 kA Breaking Capacity
  • RS Stock No. 610-415
  • Mfr. Part No. 5SY8632-8
Each
MYR1,880.59
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 500A, Breaking Capacity 4 kA, Withdrawable
  • RS Stock No. 231-394
  • Mfr. Part No. 113511 NZMC3-A500-AVE
Each
MYR15,687.04
Temporarily out of stock
Siemens SENTRON Function Tester for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-715
  • Mfr. Part No. 3VW9011-0AT31
Each
MYR3,411.17
Temporarily out of stock
Eaton 63A Cartridge Fuse, 25 x 110mm
  • RS Stock No. 228-785
  • Mfr. Part No. CEO63
1 Pack of 10
MYR2,063.43
In Stock
Eaton 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8392
  • Mfr. Part No. C10G20
Each (In a Pack of 10)
MYR8.461
In Stock
Hager RCBO, 32A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 602-211
  • Mfr. Part No. ADX482C
Each
MYR2,988.73
In Stock
Better World
Schneider Electric 100 → 415 V ac, 110 → 130V dc Shunt Trip Circuit Trip for use with ARA, ic60 MCB, IDPN
  • RS Stock No. 791-2815
  • Mfr. Part No. A9A26946
Each
MYR476.99
1
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