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

246 / 999+
Temporarily out of stock
Contactum 18 Way Steel Consumer Unit, 100A Defender
  • RS Stock No. 184-9155
  • Mfr. Part No. DD181SPMS
Each
MYR1,158.36
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
Schneider Electric MasterPacT Locking Kit for use with MasterPact NW
  • RS Stock No. 341-050
  • Mfr. Part No. 64928
Each
MYR2,072.88
Temporarily out of stock
Eaton xEffect - FRCmM RCCB, 25A, 2 Pole, 300mA, Type A, 110V
  • RS Stock No. 127-424
  • Mfr. Part No. 180606 FRCMM-25/2/03-A-110
Each
MYR786.75
Temporarily out of stock
Bourns Surge Protector, 50kA, 4kV, DIN Rail Mount
  • RS Stock No. 287-9648
  • Mfr. Part No. 1420A-PV-1500-Y
Each (In a Box of 96)
MYR1,126.206
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7873
  • Mfr. Part No. 2CDS252001R0401 S202-D40
Each
MYR291.65
In Stock
ABB RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 183-3701
  • Mfr. Part No. 2CSR245041R1164
Each
MYR620.19
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 3A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3247
  • Mfr. Part No. A9F84203
Each
MYR415.27
In Stock
Eaton xEffect MCB, 2P, 12A Curve C, 240 → 415V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 270-5266
  • Mfr. Part No. 278757 FAZ-C12/2
Each
MYR738.79
In Stock
Mersen 32A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2781
  • Mfr. Part No. H1014583
1 Box of 10
MYR811.81
In Stock
Eaton xEffect MCB, 3P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 624-0434
  • Mfr. Part No. 278873 FAZ-C16/3
Each
MYR620.77
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-9872
  • Mfr. Part No. 1SDA070702R1
Each
MYR22,384.47
In Stock
Better World
Schneider Electric Busbar Tap-Off Unit, Canalis KS Series
  • RS Stock No. 211-0505
  • Mfr. Part No. KSB32CP11D
Each
MYR596.08
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 16 Way, 250 A
  • RS Stock No. 244-940
  • Mfr. Part No. SE48B250
Each
MYR3,871.04
In Stock
ABB F200 RCCB, 16A, 2 Pole, 10mA, Type AC, 230V ac
  • RS Stock No. 231-9897
  • Mfr. Part No. 2CSF202001R0160 F202 AC-16/0.01
Each
MYR978.03
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-530
  • Mfr. Part No. 3VA6140-8JP31-2AA0
Each
MYR11,298.14
Being discontinued
RS PRO 6A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8032
Each (In a Box of 500)
MYR1.664
Temporarily out of stock
Better World
Siemens 5sV3 RCCB, 40A, 4 Pole, 30mA, 400V ac
  • RS Stock No. 211-9642
  • Mfr. Part No. 5SV3344-4KK14
Each
MYR4,565.19
In Stock
Eaton 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 852-6976
  • Mfr. Part No. HTB-56I-R
Each
MYR26.07
In Stock
Mersen 250A size 31 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2057
  • Mfr. Part No. P300002
Each
MYR701.37
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