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

33476 Products showing for Fuses & Circuit Breakers

107 of 999+
Temporarily out of stock
Hager NGT MCB, 3P, 32A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4789
  • Mfr. Part No. NGT332
Each
PHP13,925.82(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 3 channels
  • RS Stock No. 157-332
  • Mfr. Part No. 3VA2216-6HM32-0AA0
Each
PHP142,392.27(exc. VAT)
In Stock
Siemens 250A NH Fuse, NH2, 500V ac
  • RS Stock No. 395-642
  • Mfr. Part No. 3NA3244
Each (In a Pack of 3)
PHP1,714.463(exc. VAT)
Temporarily out of stock
Schurter SMD Non Resettable Fuse 2A, 125V ac/dc
  • RS Stock No. 188-4598
  • Mfr. Part No. 3-103-114
Each (On a Tape of 5)
PHP232.28(exc. VAT)
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 3P, 20A Curve B, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-213
  • Mfr. Part No. 2CDS273061R0205
Each
PHP38,093.89(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1.25kA, Breaking Capacity 42 kA, Fixed Mount
  • RS Stock No. 345-321
  • Mfr. Part No. C125H42AFM
Each
PHP1,098,509.59(exc. VAT)
In Stock
Littelfuse Spring Brass PCB Mount Fuse Clip for 6.3 x 32mm Cartridge Fuse
  • RS Stock No. 787-4249
  • Mfr. Part No. 01020071Z
Each (In a Pack of 10)
PHP13.771(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 429-193
  • Mfr. Part No. C16N6TM100
Each
PHP131,774.88(exc. VAT)
Temporarily out of stock
Eaton Eaton Distribution Parts Connection Clamp for use with Circuit Breaker
  • RS Stock No. 259-556
  • Mfr. Part No. 286812 Z-LTS-160-BK
1 Pack of 3
PHP141.81(exc. VAT)
Temporarily out of stock
Eaton xEffect MCB, 4P, 80A Curve B, 400V AC, 20 kA Breaking Capacity
  • RS Stock No. 246-050
  • Mfr. Part No. 174538 AZ-4-B80
Each
PHP41,200.73(exc. VAT)
In Stock
ABB Undervoltage Release Circuit Trip, System Pro M Compact Range
  • RS Stock No. 539-0112
  • Mfr. Part No. 2CSS200911R0005 S2C-UA 230 AC
Each
PHP3,750.52(exc. VAT)
Limited stock
Limitor Thermal Fuse +102°C 5 A, 250V ac
  • RS Stock No. 124-5057
  • Mfr. Part No. A1-5AF
Each (In a Pack of 5)
PHP74.366(exc. VAT)
Temporarily out of stock
Eaton Eaton Distribution Parts End Cap for use with Busbar, Z-BB/UL
  • RS Stock No. 244-731
  • Mfr. Part No. 171145 Z-ECUL
1 Pack of 10
PHP813.08(exc. VAT)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1kA , DIN Rail
  • RS Stock No. 127-496
  • Mfr. Part No. 183353 IZMX16H3-V10W-1
Each
PHP422,435.84(exc. VAT)
In Stock
Littelfuse 5A Resettable Fuse, 30V dc
  • RS Stock No. 517-6843
  • Mfr. Part No. RUEF500
Each (In a Pack of 10)
PHP32.373(exc. VAT)
Temporarily out of stock
Hager RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 602-217
  • Mfr. Part No. ADC817F
Each
PHP17,107.33(exc. VAT)
In Stock
Schneider Electric Resi9 R9PF MCB, 3P, 10A, 400V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8966
  • Mfr. Part No. R9PFC710
Each
PHP7,797.95(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 55 kA
  • RS Stock No. 209-6908
  • Mfr. Part No. 3VA2110-5MN32-0AA0
Each
PHP40,709.46(exc. VAT)
In Stock
HENSEL 1, 3 Phase Distribution Board, 36 Way, 63 A
  • RS Stock No. 183-2861
  • Mfr. Part No. KV9336M
Each
PHP13,239.62(exc. VAT)
Temporarily out of stock
Siemens SENTRON Terminating Resistor
  • RS Stock No. 277-0917
  • Mfr. Part No. 3WA9111-0EC50
Each
PHP1,526.14(exc. VAT)
1
107
1674
Results per page

Related links