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

46580 Products showing for Fuses & Circuit Breakers

48 / 999+
Limited stock
Littelfuse 3.15A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 894-9593
  • Mfr. Part No. 04773.15MXP
Each (In a Pack of 5)
MYR9.262
In Stock
Siemens 80A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-664
  • Mfr. Part No. 3NA3824
Each (In a Pack of 3)
MYR126.38
In Stock
Siemens 160A Solid Link for LV HRC Fuses
  • RS Stock No. 395-715
  • Mfr. Part No. 3NG1002
Each (In a Pack of 3)
MYR47.85
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 800A, Fixed Mount
  • RS Stock No. 231-9350
  • Mfr. Part No. 1SDA100741R1 XT6S 800 EkipDip LS/I 800
Each
MYR10,777.97
In Stock
Schneider Electric 250A Neutral Link for BS Fuses, 6.5mm x 38mm
  • RS Stock No. 417-307
  • Mfr. Part No. NL250
Each
MYR186.65
In Stock
Eaton 20A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7055
  • Mfr. Part No. MDA-20-R
Each
MYR11.75
In Stock
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8087
  • Mfr. Part No. C40F3
Each
MYR9,594.72
New product - Preorder today
Schneider Electric, ComPacT NSX MCCB 3P 80A, Breaking Capacity 25 kA, Panel Mount
  • RS Stock No. 654-817
  • Mfr. Part No. IL0803P25
Each
MYR2,180.38
In Stock
RS PRO 630mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 414-409
Each (In a Pack of 10)
MYR5.632
Last RS stock
Mersen Surge Protector
  • RS Stock No. 179-3063
  • Mfr. Part No. 83020152 / STPT2-40K275V-4P
Each
MYR938.40
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 232-0263
  • Mfr. Part No. 1SDA067560R1 XT2S 160 TMA 160A FF
Each
MYR2,438.18
In Stock
Eaton xPole MCB, 2P, 10A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4358
  • Mfr. Part No. 242401 PLSM-C10/2-MW
Each
MYR389.98
In Stock
Mersen 20A DII Diazed Fuse, E27 Thread Size, gG, 500V
  • RS Stock No. 377-0487
  • Mfr. Part No. A211508
Each (In a Pack of 5)
MYR7.888
In Stock
Schurter 1.6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7083
  • Mfr. Part No. 70103430
Each (In a Pack of 10)
MYR9.472
In Stock
Eaton 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1307
  • Mfr. Part No. S506-6.3-R
Each (In a Pack of 10)
MYR0.921
In Stock
RS PRO 12.5A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-224
Each (In a Pack of 10)
MYR13.353
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 250A, Fixed Mount
  • RS Stock No. 254-6353
  • Mfr. Part No. C25F32D250
Each
MYR10,762.66
In Stock
Eaton 40A Centred Tag Fuse, NH000, 690V ac
  • RS Stock No. 703-8780
  • Mfr. Part No. 40NHG000B-690
Each
MYR36.07
In Stock
Schurter 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7752
  • Mfr. Part No. 0034.1520
Each (In a Pack of 10)
MYR1.368
In Stock
Europa EUR1 RCCB, 40A, 2 Pole, 100mA, Type A, 230V ac
  • RS Stock No. 210-4749
  • Mfr. Part No. EUR140.100/2A
Each
MYR341.87
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