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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

213 / 999+
Temporarily out of stock
Schneider Electric VigiPacT Wiring Kit for use with VigiPacT RHB Residual Current Protection Relay
  • RS Stock No. 655-030
  • Mfr. Part No. LV481017
Each
MYR2,661.05
In Stock
Eaton 100A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 181-8519
  • Mfr. Part No. C22M100
Each (In a Box of 10)
MYR24.807
Temporarily out of stock
Eaton Eaton Moeller Series NZM Mounting Plate for use with N3, NS3, NZM3, NZM3-NA, PN3
  • RS Stock No. 230-417
  • Mfr. Part No. 119382 NZM3-XAP10
Each
MYR852.79
New product - Preorder today
FUSE 125V V/FA NANO2 RoHS 4A
  • RS Stock No. 553-010
  • Mfr. Part No. 0453004.MR
1 Bag of 50
MYR387.25
In Stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)3, NZM3
  • RS Stock No. 247-081
  • Mfr. Part No. 100685 NZM3-XTVDV-NA
Each
MYR1,200.43
In Stock
Siemens 35A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 397-436
  • Mfr. Part No. 3NE8003-1
Each (In a Pack of 3)
MYR367.533
Last RS stock
ETA Thermal Circuit Breaker - 129-L11 Single Pole 250V Voltage Rating, 8A Current Rating
  • RS Stock No. 728-8695
  • Mfr. Part No. 129-L11-H-KF-8A
Each
MYR145.87
Temporarily out of stock
Hager CFC RCCB, 40A, 3P+N Pole, 300mA, Type AC, 230 → 400V ac
  • RS Stock No. 597-887
  • Mfr. Part No. CFC841F
Each
MYR993.96
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 4A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7797
  • Mfr. Part No. 2CDS254001R0044 S204-C4
Each
MYR953.19
In Stock
Mersen 10A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2785
  • Mfr. Part No. H213102
1 Box of 10
MYR210.43
Unavailable
Schneider Electric, NSX MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 219-8342
  • Mfr. Part No. LV429885
Each
MYR10,799.62
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
RS PRO Industrial Surge Protector, 2000A, 20 V, DIN Rail Mount
  • RS Stock No. 101-779
Each
MYR422.97
In Stock
Schneider Electric RCBO, 16A Current Rating, 1P + N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-654
  • Mfr. Part No. A9D56616
Each
MYR637.86
In Stock
ABB Fuse Holder Fuseholder Cap
  • RS Stock No. 231-9092
  • Mfr. Part No. 1SCA022459R8480 OFM690
Each
MYR702.91
Temporarily out of stock
Schneider Electric Compact Long Rear Connection for use with NS630b
  • RS Stock No. 340-972
  • Mfr. Part No. 33606
Each
MYR2,368.26
Temporarily out of stock
Schneider Electric, PowerPact MCCB 2P 20A, Breaking Capacity 35 kA, Clip-On
  • RS Stock No. 341-122
  • Mfr. Part No. BGF26020
Each
MYR3,721.60
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve B, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2112
  • Mfr. Part No. A9F06216
Each
MYR251.93
Temporarily out of stock
TE Connectivity 2204899 Busbar Connector, 48V
  • RS Stock No. 201-3501
  • Mfr. Part No. 2204899-1
Each
MYR74.85
In Stock
Eaton xEffect MCB, 1P, 2A Curve C, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6999
  • Mfr. Part No. 278549 FAZ-C2/1
Each
MYR242.88
1
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