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

135 / 999+
Temporarily out of stock
Phoenix Contact CM 2-PA-PT/PLT Adapter for use with PLT-SEC, PT
  • RS Stock No. 131-459
  • Mfr. Part No. 2905284
Each
MYR4,813.62
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 20A Curve C
  • RS Stock No. 231-9662
  • Mfr. Part No. 2CDS251001R0204 S201 C 20A - 10 KA
1 Box of 1
MYR109.18
In Stock
Better World
Schneider Electric Thermal Circuit Breaker - 1P + N Pole DIN Rail Mount, 4A Current Rating
  • RS Stock No. 323-9021
  • Mfr. Part No. GB2CD09
Each
MYR314.02
Being discontinued
RS PRO 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-334
Each (In a Pack of 10)
MYR1.70
Temporarily out of stock
Better World
Siemens SENTRON 5SY MCB, 2P, 4A Curve D
  • RS Stock No. 232-2331
  • Mfr. Part No. 5SY7204-8
Each
MYR570.07
Temporarily out of stock
Eaton 630A Tag Fuse, 660V ac, 133/184mm
  • RS Stock No. 261-697
  • Mfr. Part No. TTM630
Each
MYR1,529.98
In Stock
Phoenix Contact Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 207-2731
  • Mfr. Part No. 2906798
Each
MYR481.86
In Stock
Siemens 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 690V
  • RS Stock No. 225-5422
  • Mfr. Part No. 3NW7034
Each
MYR242.06
Temporarily out of stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 80A Curve B
  • RS Stock No. 221-0878
  • Mfr. Part No. A9N18349
Each
MYR3,134.08
New product - Preorder today
FUSE 250V FA 3AB Pb-FREE 12A
  • RS Stock No. 552-988
  • Mfr. Part No. 0314012.MXP
1 Bag of 100
MYR345.87
In Stock
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse
  • RS Stock No. 866-3362
  • Mfr. Part No. 0031.1351
Each
MYR117.06
In Stock
Siemens 250A German Standard Fuse, NH2, 800V
  • RS Stock No. 210-6977
  • Mfr. Part No. 3NE4327-0B
Each (In a Pack of 3)
MYR1,693.403
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 260-8125
  • Mfr. Part No. C40N32D400
Each
MYR20,557.44
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 25 kA, 36 kA, Fixed Mount
  • RS Stock No. 874-4137
  • Mfr. Part No. 3VA1110-4ED36-0AA0
Each
MYR2,338.41
Temporarily out of stock
ABB System Pro M Compact S200MUC MCB, 2P, 6A Curve K, 440V AC, 440V DC, 25 kA Breaking Capacity
  • RS Stock No. 231-9735
  • Mfr. Part No. 2CDS272061R0377 S202 MUC K 6A 10 KA
1 Box of 1
MYR1,344.04
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 232-0095
  • Mfr. Part No. 1SDA054437R1 T5N400 FF TMA 400A
Each
MYR4,711.98
Temporarily out of stock
Eaton xE?ect - FRCdM RCCB, 25A, 4 Pole, 30mA, 240/415V ac
  • RS Stock No. 127-407
  • Mfr. Part No. 179530 FRCDM-25/4/003-G/BFQ
Each
MYR4,737.30
In Stock
RS PRO 6A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3427
Each (In a Pack of 10)
MYR2.104
Temporarily out of stock
Schneider Electric, ComPacT NSX Circuit breaker 2P 80A, Breaking Capacity 85 KA, Fixed Mount
  • RS Stock No. 119-217
  • Mfr. Part No. C10M2TM080
Each
MYR1,760.66
In Stock
Eaton 3A F Glass Cartridge Fuse, 6.3 x 20mm
  • RS Stock No. 849-5831
  • Mfr. Part No. AGW-3
Each (In a Pack of 5)
MYR12.602
1
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