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

33502 Products showing for Fuses & Circuit Breakers

163 of 999+
Temporarily out of stock
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 25 kA
  • RS Stock No. 249-215
  • Mfr. Part No. 3VA6610-5HL42-0AA0
Each
PHP591,618.96(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 110A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-179
  • Mfr. Part No. 3VA5111-1MH31-0AA0
Each
PHP48,744.26(exc. VAT)
Temporarily out of stock
Schneider Electric Multi9 M9F1 MCB, 4P, 32A Curve C, 440V AC, 250V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-009
  • Mfr. Part No. M9F11432
Each
PHP18,043.90(exc. VAT)
In Stock
Eaton 7.5A Brown Blade Car Fuse, 32V dc No
  • RS Stock No. 852-7342
  • Mfr. Part No. ATC-7-1-2
Each
PHP74.12(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4529
  • Mfr. Part No. 3VA2125-6HM32-0AA0
Each
PHP75,708.59(exc. VAT)
Temporarily out of stock
Siemens SENTRON 3VA9 LCD display for use with 3VA breakers
  • RS Stock No. 218-1875
  • Mfr. Part No. 3VA9987-0TD10
Each
PHP67,805.56(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 20A, Breaking Capacity 7 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-232
  • Mfr. Part No. 3VA5120-5EF31-0AA0
Each
PHP36,215.52(exc. VAT)
Temporarily out of stock
Siemens 100A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 397-345
  • Mfr. Part No. 3NE1021-0
Each (In a Pack of 3)
PHP7,249.217(exc. VAT)
Currently unavailable
Bourns 1.5A Resettable Fuse, 15V
  • RS Stock No. 245-9142
  • Mfr. Part No. MF-LSMF150X-2
Each (On a Tape of 10)
PHP28.42(exc. VAT)
Temporarily out of stock
Siemens Busbar
  • RS Stock No. 203-3278
  • Mfr. Part No. 8US1251-5DM07
Each (In a Pack of 6)
PHP3,267.792(exc. VAT)
In Stock
Bourns 70A Tag Fuse, 66mm, 500V ac, 24.1mm
  • RS Stock No. 254-4201
  • Mfr. Part No. PF-JT3-70
Each
PHP1,887.94(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 231-137
  • Mfr. Part No. 113332 NZMH2-A100-SVE
Each
PHP59,601.76(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-900
  • Mfr. Part No. 3VA6460-7KT31-0AA0
Each
PHP368,753.83(exc. VAT)
Temporarily out of stock
Siemens SENTRON Long Rear Connector for use with 3VA12
  • RS Stock No. 161-424
  • Mfr. Part No. 3VA9211-0QE20
Each
PHP2,478.59(exc. VAT)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IUGN66 2 Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0290
  • Mfr. Part No. IUGN66-1-72-10.0
1 Box of 5
PHP41,671.85(exc. VAT)
Temporarily out of stock
Siemens SENTRON 2 Phase Busbar, 1.5mm Pitch
  • RS Stock No. 226-0814
  • Mfr. Part No. 5ST3642
Each (In a Pack of 10)
PHP1,611.485(exc. VAT)
Temporarily out of stock
Hager Push Button Circuit Trip for use with Modular Devices
  • RS Stock No. 144-4657
  • Mfr. Part No. SVN391
Each
PHP4,454.68(exc. VAT)
Temporarily out of stock
ABB Tmax Mechanical Interlock for use with Tmax T
  • RS Stock No. 237-5998
  • Mfr. Part No. 1SDA060685R1 MIR-HB T6
1 Box of 1
PHP40,466.00(exc. VAT)
Temporarily out of stock
Mersen Surge Protector
  • RS Stock No. 179-3077
  • Mfr. Part No. 83230003 / SP23-20K275V-LF
Each
PHP2,538.00(exc. VAT)
In Stock
ABB F200 RCCB, 100A, 4 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 225-6136
  • Mfr. Part No. 2CSF204101R3900 F204 A-100/0,3
Each
PHP20,268.86(exc. VAT)
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