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

277 / 999+
Temporarily out of stock
Better World
Schneider Electric Busbar Trunking Jointing Device, 630A, Canalis KS Series
  • RS Stock No. 211-0485
  • Mfr. Part No. KSA630ZJ4
Each
MYR4,540.32
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 3m, 40A, KBB Series
  • RS Stock No. 219-8868
  • Mfr. Part No. KBB40ED44305W
Each
MYR1,363.93
Temporarily out of stock
ABB Auxiliary Contact for use with Tmax XT
  • RS Stock No. 237-6202
  • Mfr. Part No. 1SDA066995R1
Each
MYR207.54
Temporarily out of stock
Siemens Busbar Tap-Off Unit with Circuit Breaker, BD01 Series
  • RS Stock No. 213-2426
  • Mfr. Part No. BVP:034276
Each
MYR1,930.76
Temporarily out of stock
Eaton 20A Rail Mount Fuse Holder, 1P, 460 V dc, 660 → 690V ac
  • RS Stock No. 182-1406
  • Mfr. Part No. RS20F
Each (In a Box of 10)
MYR192.047
Last RS stock
ABB S202L MCB, 2P, 25A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 203-698
  • Mfr. Part No. 2CDS242701R0254
Each
MYR207.67
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7716
  • Mfr. Part No. 2CDS252001R0164 S202-C16
Each
MYR403.91
Temporarily out of stock
Better World
Schneider Electric, PowerLogic, 630A, Energy Sensor, 3.7W, Wireless
  • RS Stock No. 201-1457
  • Mfr. Part No. LV434022
Each
MYR7,079.14
Temporarily out of stock
ABB Tmax XT Trip Unit for use with XT4
  • RS Stock No. 236-7295
  • Mfr. Part No. 1SDA067470R1 TMD 32-320 XT4 4p
Each
MYR3,167.05
Temporarily out of stock
Siemens Surge Arrester
  • RS Stock No. 226-1624
  • Mfr. Part No. 5SD7413-2
Each
MYR2,578.91
In Stock
Better World
Schneider Electric iC60 RCD, 63A, 30mA
  • RS Stock No. 734-9210
  • Mfr. Part No. A9V11463
Each
MYR2,602.90
Temporarily out of stock
ABB Emax 2, Tmax XT Undervoltage Release for use with Circuit Breaker
  • RS Stock No. 231-9305
  • Mfr. Part No. 1SDA067496R1 MA 160 Im=800...1600 XT4 3
Each
MYR1,134.77
Temporarily out of stock
ABB F200 RCCB, 80A, 4 Pole, 30mA, Type A, 277 V ac, 480 V ac
  • RS Stock No. 177-5060
  • Mfr. Part No. 2CSF204401R1800 F204 A-80/0,03 AP-R
Each
MYR2,077.99
Temporarily out of stock
Eaton 120V60HZ), MSC-DE-12-M17-SP(110V50HZ Electronic Circuit Breaker 16.7A , DIN Rail
  • RS Stock No. 120-888
  • Mfr. Part No. 167804 MSC-DE-12-M17-SP(110V50HZ,120V60HZ)
Each
MYR1,561.86
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA IZMX/INX, 3 channels , Fixed
  • RS Stock No. 127-547
  • Mfr. Part No. 183473 IZMX16B3-P16W-1
Each
MYR60,909.28
In Stock
Legrand MCB, 1P, 10A
  • RS Stock No. 293-1401
  • Mfr. Part No. 0 058 10
Each
MYR86.25
Temporarily out of stock
Lovato MCB, 1P, 4A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1633
  • Mfr. Part No. P1MBUH1PC04
Each
MYR284.46
Temporarily out of stock
Schneider Electric PowerPact J Terminal Cover for use with Circuit Breaker
  • RS Stock No. 438-816
  • Mfr. Part No. S37440
Each
MYR931.06
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9642
  • Mfr. Part No. 3VA11103FD420AA0
Each
MYR2,584.90
In Stock
Siemens 32A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1095
  • Mfr. Part No. 5SE2332
Each (In a Pack of 10)
MYR16.378
1
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