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

288 / 999+
In Stock
ABB FH200 RCCB, 63A, 2 Pole, 30mA, Type AC
  • RS Stock No. 540-1638
  • Mfr. Part No. 2CSF202006R1630 FH202 AC-63/0,03
Each
MYR481.16
In Stock
Better World
Schneider Electric Earthing Strap Tinned Copper 155 x 17mm Diameter
  • RS Stock No. 222-3853
  • Mfr. Part No. NSYEB1516D8
Each (In a Pack of 10)
MYR28.815
In Stock
Bulgin 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 359-5719
  • Mfr. Part No. FX0455/S
Each (In a Pack of 5)
MYR28.32
In Stock
ABB 220 → 240 V ac, 220 → 250V dc Shunt Trip Shunt trip for use with Tmax XT1, Tmax XT2, Tmax XT3, Tmax
  • RS Stock No. 192-0918
  • Mfr. Part No. 1SDA066317R1
Each
MYR572.99
In Stock
Socomec 50A Neutral Link for Cylindrical Fuses, 14mm x 51mm
  • RS Stock No. 122-5278
  • Mfr. Part No. 60290000
Each (In a Pack of 10)
MYR6.46
Temporarily out of stock
Siemens SENTRON 5SJ4150 MCB, 1P, 50A Curve B, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 299-906
  • Mfr. Part No. 5SJ4150-6HG40
Each
MYR571.87
Temporarily out of stock
Schneider Electric MasterPact NT Power Supply Module for use with ComPact NSX, MasterPact MTZ, MasterPact NT,
  • RS Stock No. 205-318
  • Mfr. Part No. LV454440
Each
MYR7,158.67
In Stock
Eaton xEffect MCB, 2P, 2A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3298
  • Mfr. Part No. 278748 FAZ-C2/2
Each
MYR604.01
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7881
  • Mfr. Part No. C25F34V100
Each
MYR14,796.42
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1709
  • Mfr. Part No. 3VA2063-5KP36-0AA0
Each
MYR5,882.05
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7708
  • Mfr. Part No. C12N4TM160L
Each
MYR7,758.13
Temporarily out of stock
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-520
  • Mfr. Part No. 3VW9011-0AL32
1 Kit
MYR1,173.27
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-3751
  • Mfr. Part No. 3VA1340-4EF32-0AA0
Each
MYR6,112.70
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-768
  • Mfr. Part No. 3VA6140-7JQ41-0AA0
Each
MYR14,177.00
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 3P, 25A Curve B, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-192
  • Mfr. Part No. 2CDS273061R0255
Each
MYR3,033.37
Temporarily out of stock
Eaton Switch Disconnector for use with Circuit Breaker
  • RS Stock No. 229-005
  • Mfr. Part No. CCP2-1-30CC
1 Pack of 6
MYR1,523.80
In Stock
Better World
Schneider Electric Door Mounting Handle Plate for use with Manual Motor Control Switch
  • RS Stock No. 813-9358
  • Mfr. Part No. KZ81
Each (In a Pack of 2)
MYR107.57
In Stock
HENSEL 1, 3 Phase Distribution Board, 36 Way, 63 A
  • RS Stock No. 183-2861
  • Mfr. Part No. KV9336M
Each
MYR1,130.09
In Stock
HENSEL 1, 3 Phase Distribution Board, 12 Way, 63 A
  • RS Stock No. 183-2857
  • Mfr. Part No. KV9112M
Each
MYR357.10
In Stock
Socomec 32A Fuse Holder for 10 x 38mm Fuse, 1P, 1kV dc
  • RS Stock No. 252-3750
  • Mfr. Part No. 57PV0001
Each (In a Pack of 12)
MYR35.101
1
288
2329
Results per page

Related links