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

259 / 999+
In Stock
Better World
Schneider Electric iC60 RCD, 25A, 30mA
  • RS Stock No. 734-9703
  • Mfr. Part No. A9Q31225
Each
MYR1,908.00
Temporarily out of stock
Phoenix Contact CAPAROC Feed Unit for use with Circuit Breaker
  • RS Stock No. 484-151
  • Mfr. Part No. 1344363
Each
MYR253.98
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 45A, Breaking Capacity 14 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-409
  • Mfr. Part No. 3VA5145-4ED21-1AA0
Each
MYR1,868.98
In Stock
Better World
ABB Compact Home SH200 MCB, 1P, 40A Curve C, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 539-8267
  • Mfr. Part No. 2CDS211001R0404 SH201-C40
Each
MYR61.05
In Stock
ABB SMISSLINE TP MCB, 2P, 6A Curve B, 400V AC
  • RS Stock No. 246-2560
  • Mfr. Part No. 2CCS572001R0065
Each
MYR509.34
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 4A Curve D
  • RS Stock No. 231-9723
  • Mfr. Part No. 2CDS272001R0041 S202M D 4A - 15 KA
1 Box of 1
MYR362.84
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 9 kA, Plug In
  • RS Stock No. 246-896
  • Mfr. Part No. 192302 NZMH3-4-PX400/VAR-SVE
Each
MYR25,670.69
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
Bourns 4A Resettable Fuse, 30V
  • RS Stock No. 647-8601
  • Mfr. Part No. MF-R400
Each (In a Pack of 10)
MYR2.109
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 110 kA
  • RS Stock No. 209-6939
  • Mfr. Part No. 3VA2216-7MS32-0AA0
Each
MYR5,574.49
In Stock
ABB F200 RCCB, 100A, 4 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 225-6127
  • Mfr. Part No. 2CSF204101R1900 F204 A-100/0,03
Each
MYR1,732.17
Temporarily out of stock
Better World
Schneider Electric Horizontal Distribution Busbar Trunking, 3m, 630A, Canalis KS Series
  • RS Stock No. 211-0482
  • Mfr. Part No. KSA630ED4306
Each
MYR11,962.61
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 30A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-557
  • Mfr. Part No. 3VA5130-4ED11-0AA0
Each
MYR1,003.40
In Stock
Better World
Siemens Surge Protector, 400V ac, Clip-On Mount
  • RS Stock No. 122-9475
  • Mfr. Part No. 3RT2916-1BE00
Each
MYR80.15
Temporarily out of stock
Eaton 1 Phase Distribution Board, 7 Way, 125 A
  • RS Stock No. 124-3001
  • Mfr. Part No. EAM7 EAM7
Each
MYR648.08
Last RS stock
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 703-2802
  • Mfr. Part No. 0853.1201
Each (In a Bag of 10)
MYR4.323
Temporarily out of stock
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0931
  • Mfr. Part No. 3WA9111-0EK43
1 Set
MYR1,409.42
In Stock
Allen Bradley 140MT Auxiliary Contact for use with Motor Protection Circuit Breaker
  • RS Stock No. 273-2279
  • Mfr. Part No. 140MT-C-ASA11
Each
MYR76.74
In Stock
Schneider Electric Resi9 Resi9 XE DM MCB, 1P, 16A Curve D, 230V AC, 3000 A Breaking Capacity
  • RS Stock No. 287-6047
  • Mfr. Part No. R9EFD616
Each
MYR169.53
Temporarily out of stock
Eaton 6A Tag Fuse, 27 x 129mm, 0.46/0.66kV, 111mm
  • RS Stock No. 263-127
  • Mfr. Part No. TBC6
1 Pack of 20
MYR3,746.33
1
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