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

285 / 999+
In Stock
ABB Tmax Undervoltage Release for use with Tmax T
  • RS Stock No. 237-6008
  • Mfr. Part No. 1SDA062087R1 UVR T7-M-X1 24VAC/DC
Each
MYR1,610.18
Temporarily out of stock
Schurter SMD Non Resettable Fuse 2.5A, 125V ac/dc
  • RS Stock No. 188-4600
  • Mfr. Part No. 3-103-118
Each (On a Tape of 5)
MYR18.068
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4070
  • Mfr. Part No. 1SDA072153R1
Each
MYR31,950.37
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IEG6 Single Pole Panel Mount, 45A Current Rating
  • RS Stock No. 275-0200
  • Mfr. Part No. IEG6-1-51-45.0-A-01-V
1 Box of 5
MYR1,361.79
Temporarily out of stock
Eaton MCB, 3P, 8A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 244-009
  • Mfr. Part No. 101318 PLI-C8/3
Each
MYR809.34
Temporarily out of stock
ABB 4A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 251-3424
  • Mfr. Part No. 1SCA022627R0310
1 Box of 9
MYR332.29
In Stock
Better World
Schneider Electric Earthing Strip
  • RS Stock No. 222-3856
  • Mfr. Part No. NSYECB1M153
Each
MYR446.19
Temporarily out of stock
Siemens 550A Tag Fuse, 137mm, 750V
  • RS Stock No. 608-672
  • Mfr. Part No. 3NB1138-1KK11
1 Pack of 3
MYR3,645.70
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 3P, 63A, Type A, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-305
  • Mfr. Part No. 5SY4363-5
Each
MYR2,056.55
Temporarily out of stock
Schneider Electric Acti9 Acti9 iC60 MCB, 1P, 3A Curve K, 230V AC, 72V DC, 100 kA Breaking Capacity
  • RS Stock No. 212-249
  • Mfr. Part No. A9F95103
Each
MYR545.00
In Stock
Siemens 1.6A T Cartridge Fuse, 5 x 20mm
  • RS Stock No. 271-3209
  • Mfr. Part No. 8WA1822-7EF78
Each (In a Pack of 10)
MYR15.54
Temporarily out of stock
Schneider Electric Chassis for use with Compact NS 1600, Masterpact NT 16
  • RS Stock No. 247-1865
  • Mfr. Part No. 33726
Each
MYR26,210.16
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 13A Curve C, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 248-617
  • Mfr. Part No. 102208 FAZ-C13/2-RT
Each
MYR803.91
In Stock
Better World
ABB S200C MCB, 2P, 6A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1603
  • Mfr. Part No. 2CDS251281R0064
Each
MYR259.52
Temporarily out of stock
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 202-501
  • Mfr. Part No. 1STQ007409A0000
Each
MYR6,585.95
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-8059
  • Mfr. Part No. C25W46E160
Each
MYR27,132.68
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0085
  • Mfr. Part No. 1SDA054325R1 T5N400 FF PR221-LS 400A
Each
MYR6,674.13
In Stock
Eaton 6A British Standard Fuse, 240V, 35mm
  • RS Stock No. 181-8801
  • Mfr. Part No. STD6
Each
MYR18.05
In Stock
Mersen 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6726
  • Mfr. Part No. J084303
Each (In a Pack of 10)
MYR22.31
In Stock
Eaton MCB, 1+N, 40A Curve C
  • RS Stock No. 230-1101
  • Mfr. Part No. 264699 PLG6-C40/1N
Each
MYR87.92
1
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