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

287 / 999+
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 63A, Breaking Capacity 36kA
  • RS Stock No. 260-9742
  • Mfr. Part No. LV510345
Each
MYR2,891.72
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 100A 3VA2, 3 channels
  • RS Stock No. 157-076
  • Mfr. Part No. 3VA2110-5JQ36-0AA0
Each
MYR9,835.66
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5258
  • Mfr. Part No. 3VA2580-5HN42-0AA0
Each
MYR19,639.58
Temporarily out of stock
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, KSB Series
  • RS Stock No. 339-612
  • Mfr. Part No. KSB160DC4SP3
Each
MYR12,457.97
In Stock
Schurter PC Board Non Resettable Fuse, Radial 4A, 250V ac
  • RS Stock No. 284-5401
  • Mfr. Part No. 0034.6621
Each (In a Pack of 10)
MYR2.31
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-161
  • Mfr. Part No. 3VA6580-7HL32-2AA0
Each
MYR32,427.85
Temporarily out of stock
Siemens 25A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6911
  • Mfr. Part No. 3NA6810-6
Each (In a Pack of 3)
MYR259.557
Temporarily out of stock
Siemens SENTRON Connection Unit for use with 3VA1 400/630 3VA2 400/630
  • RS Stock No. 269-7209
  • Mfr. Part No. 3VA9483-0QD00
Each (In a Pack of 3)
MYR230.53
In Stock
Schurter SMD Non Resettable Fuse 160mA, 250 V ac, 125V dc
  • RS Stock No. 703-2723P
  • Mfr. Part No. 3404.2408.22
Each (Supplied on a Reel)
MYR5.594
Temporarily out of stock
Eaton 100A Fuse Holder for 126 x 62 x 36mm Fuse, 1P, 690V
  • RS Stock No. 263-152
  • Mfr. Part No. CM100FW
1 Pack of 5
MYR1,766.08
In Stock
Eaton 250mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9410
  • Mfr. Part No. S500-250-R
1 Bag of 1000
MYR3,515.00
Temporarily out of stock
Eaton 7.5A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 262-459
  • Mfr. Part No. LP-CC-7-1/2
1 Pack of 10
MYR2,935.33
In Stock
Better World
Schneider Electric Compact Nsx, Compact Nsx Dc Connection Adapter for use with Compact Nsx 100/160/250
  • RS Stock No. 221-1186
  • Mfr. Part No. LV429307
Each
MYR193.71
In Stock
Bourns 1.1A Resettable Fuse, 30V
  • RS Stock No. 647-8033
  • Mfr. Part No. MF-SM100-2
Each (In a Pack of 10)
MYR1.643
Temporarily out of stock
Better World
ABB, XT4L MCCB 4P 250A, Fixed Mount
  • RS Stock No. 236-6825
  • Mfr. Part No. 1SDA068575R1 XT4L 250 Ekip LS/I 250A FF
Each
MYR9,865.34
Temporarily out of stock
Siemens 100A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2051
  • Mfr. Part No. 3NA7130
Each (In a Pack of 3)
MYR76.363
Temporarily out of stock
Siemens 1.1kA Tag Fuse, NH3, 800V
  • RS Stock No. 608-740
  • Mfr. Part No. 3NC3342-6U
1 Pack of 3
MYR3,926.14
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-138
  • Mfr. Part No. KV 8448 M
Each
MYR1,280.94
Temporarily out of stock
Siemens 50A Centred Tag Fuse, NH2, 500V
  • RS Stock No. 230-2953
  • Mfr. Part No. 3NA6220
Each (In a Pack of 3)
MYR191.26
In Stock
RS PRO 500mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1597
Each (In a Pack of 10)
MYR5.72
1
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