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

156 / 999+
In Stock
SIBA 4A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 314-4787
  • Mfr. Part No. 50-179-06/4A
Each (In a Pack of 5)
MYR44.256
Temporarily out of stock
Better World
Schneider Electric Acti 9 C60-PV MCB, 2P, 25A Curve B, 800V DC, 3 kA Breaking Capacity
  • RS Stock No. 776-3626
  • Mfr. Part No. A9N61660
Each
MYR794.12
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 25A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9627
  • Mfr. Part No. 2CDS253001R0251 S203-D25
Each
MYR417.10
In Stock
Resi9 Busbar, 230V ac, 18mm Pitch
  • RS Stock No. 585-420
  • Mfr. Part No. R9PXH210
1 Pack of 5
MYR155.16
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 25A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-295
  • Mfr. Part No. 3VA5125-4EC31-0AA0
Each
MYR1,990.24
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 6A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7790
  • Mfr. Part No. 2CDS254001R0064 S204-C6
Each
MYR960.82
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
Better World
Schneider Electric Acti 9 IC60L MCB, 2P, 3A, Type Z, 400V AC, 125V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0120
  • Mfr. Part No. A9F92203
Each
MYR664.03
In Stock
RS PRO 2.5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1591
Each (In a Pack of 10)
MYR5.603
In Stock
Better World
Schneider Electric Linergy Busbar, 690V, 45mm Pitch
  • RS Stock No. 400-2000
  • Mfr. Part No. GV2G445
Each
MYR162.12
In Stock
Better World
Schneider Electric 10A Cartridge Fuse, 8.5 x 32mm
  • RS Stock No. 219-9040
  • Mfr. Part No. DF2BN1000
Each (In a Pack of 10)
MYR30.531
Being discontinued
Wurth Elektronik 10A Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 283-6464
  • Mfr. Part No. 696212000000
Each
MYR7.54
In Stock
Eaton 5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-611
  • Mfr. Part No. TDC11-5A
Each (In a Pack of 10)
MYR24.904
In Stock
Better World
Schneider Electric TeSys for use with TeSys GV-U
  • RS Stock No. 211-2540
  • Mfr. Part No. GVAPL01
Each
MYR456.52
In Stock
Schneider Electric RCBO, 20A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type AC, Acti9 Range
  • RS Stock No. 276-9126
  • Mfr. Part No. A9D57420
Each
MYR4,312.00
Temporarily out of stock
Better World
Schneider Electric Vertical Distribution Busbar Trunking, 1.5m, 500A, Canalis KS Series
  • RS Stock No. 211-0472
  • Mfr. Part No. KSA500EV4153
Each
MYR6,169.15
In Stock
Better World
Schneider Electric 220 → 240V ac Undervoltage Release Circuit Trip for use with ARA, iC40, ic60 MCB, iC65, iDPN
  • RS Stock No. 791-2799
  • Mfr. Part No. A9A26960
Each
MYR804.22
In Stock
Acti9 iID RCCB, 25A, 2 Pole, 10mA, Type A-SI, 220 → 240V ac
  • RS Stock No. 585-481
  • Mfr. Part No. A9R30225
Each
MYR3,020.03
Temporarily out of stock
Eaton RCBO, 32A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type B, FRBm6 Range
  • RS Stock No. 123-315
  • Mfr. Part No. 170808 FRBM6-B32/2/01-A
Each
MYR890.81
Temporarily out of stock
Eaton Phase Busbar 1 Phase Busbar, 277V
  • RS Stock No. 230-707
  • Mfr. Part No. 121981 BB-UL-18/1P-1M/57
Each
MYR155.85
1
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