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

282 / 999+
Temporarily out of stock
Eaton xEffect RCCB, 40A, 2 Pole, 30mA, Type F, 240V ac
  • RS Stock No. 242-937
  • Mfr. Part No. 187367 FRCMM-40/2/003-G/F
Each
MYR1,357.95
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0501
  • Mfr. Part No. KSB250DC5
Each
MYR7,835.94
Temporarily out of stock
Phoenix Contact TMCP SB Plug In Bridge for use with TMCP SOCKET M Socket
  • RS Stock No. 135-778
  • Mfr. Part No. 0916602
1 Pack of 6
MYR809.44
Temporarily out of stock
Siemens SENTRON Guide Frame for use with Circuit Breaker 3VA27
  • RS Stock No. 265-570
  • Mfr. Part No. 3VW8116-7BE01
Each
MYR14,557.22
In Stock
Eaton 16A Fast Acting Cartridge Fuse
  • RS Stock No. 228-714
  • Mfr. Part No. 16D16Q
1 Pack of 10
MYR151.63
In Stock
Siemens SIRIUS Cover for use with 3RV2742
  • RS Stock No. 210-9275
  • Mfr. Part No. 3RV2948-1LA00
Each
MYR83.03
Temporarily out of stock
Resi9 Busbar, 230V ac, 18mm Pitch
  • RS Stock No. 585-435
  • Mfr. Part No. R9EXVN15
1 Pack of 5
MYR303.63
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3684
  • Mfr. Part No. 1SDA071657R1
Each
MYR67,464.47
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 4 channels
  • RS Stock No. 157-112
  • Mfr. Part No. 3VA2140-5JP42-0AA0
Each
MYR8,694.50
In Stock
Schneider Electric RCBO, 25A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 130-868
  • Mfr. Part No. A9D57425
Each
MYR4,242.37
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 200mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-659
  • Mfr. Part No. 3RV2811-0BD10
Each
MYR1,078.60
In Stock
Littelfuse 1.1A Resettable Fuse, 33V dc
  • RS Stock No. 787-4205P
  • Mfr. Part No. 2920L100PR
Each (Supplied on a Reel)
MYR2.716
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-4100
  • Mfr. Part No. 1SDA072194R1
Each
MYR28,315.23
In Stock
Littelfuse 2.5A Resettable Fuse, 30V dc
  • RS Stock No. 517-6815P
  • Mfr. Part No. RUEF250
Each (Supplied in a Bag)
MYR1.663
Temporarily out of stock
ABB S800PV MCB, 3P, 50A Curve B, 1200V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5935
  • Mfr. Part No. 2CCF019617R0001 S803PV-SP50 - 5 kA
Each
MYR1,929.13
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1+N, 2A Curve B
  • RS Stock No. 237-3193
  • Mfr. Part No. 2CDS251103R0025
Each
MYR299.94
In Stock
RS PRO 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8097
Each (In a Pack of 5)
MYR9.076
In Stock
Littelfuse Inline Fuse Holder for ATO Fuse, 80V dc
  • RS Stock No. 787-4340
  • Mfr. Part No. 178.6152.0001
Each
MYR17.66
In Stock
Phoenix Contact Surge Protector, ≤1.5kV, DIN Rail Mount
  • RS Stock No. 890-3746
  • Mfr. Part No. 2906101
Each
MYR271.92
In Stock
Littelfuse 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3530
  • Mfr. Part No. 021906.3MXAP
Each (In a Pack of 10)
MYR3.892
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