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

50 of 999+
Schneider Electric, ComPacT MCCB 3P 1.25kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-619
  • Mfr. Part No. C125N320FM
Each
PHP361,723.63(exc. VAT)
Better World
Schneider Electric NSX Motor Mechanism for use with ComPact NSX250
  • RS Stock No. 213-1346
  • Mfr. Part No. LV431546
Each
PHP104,817.41(exc. VAT)
Schneider Electric Handle Locking Device for use with Compact INS, Compact INV, ComPact NSX, ComPact NSX DC, EasyPact
  • RS Stock No. 247-1887
  • Mfr. Part No. 41940
Each
PHP6,647.92(exc. VAT)
ABB S403E MCB, 4P, 25A Curve C, 12V AC, 6 kA Breaking Capacity
  • RS Stock No. 140-610
  • Mfr. Part No. 2CCS553103R8254
Each
PHP11,817.59(exc. VAT)
ABB Tmax XT Undervoltage Release Wired for use with Circuit Breaker
  • RS Stock No. 232-0175
  • Mfr. Part No. 1SDA066399R1 UVR-C XT1..4 F/P 220-240VA
Each
PHP11,520.84(exc. VAT)
Schneider Electric Resi9 R9P MCB, 1P, 20A, 230V AC
  • RS Stock No. 358-033
  • Mfr. Part No. R9PTC620
Each
PHP20,659.01(exc. VAT)
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-412
  • Mfr. Part No. KV 2524
Each
PHP9,958.51(exc. VAT)
HENSEL ENYBOARD Distribution Board, 41 A
  • RS Stock No. 117-118
  • Mfr. Part No. RK 1019 T
Each
PHP6,125.91(exc. VAT)
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC 2 Pole 65V dc Voltage Rating DIN Rail, 2A Current Rating
  • RS Stock No. 135-502
  • Mfr. Part No. 0914811
1 Pack of 3
PHP31,106.56(exc. VAT)
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 346-736
  • Mfr. Part No. C100H42EFM
Each
PHP990,452.99(exc. VAT)
ABB S403M MCB, 3P, 40A Curve C, 440V AC, 12V DC, 15 kA Breaking Capacity
  • RS Stock No. 140-699
  • Mfr. Part No. 2CCS573001R0404
Each
PHP13,740.74(exc. VAT)
Better World
Siemens SENTRON for use with 3VA1 and 3VA20 up → 3VA25
  • RS Stock No. 210-9429
  • Mfr. Part No. 3VA9988-0BL32
Each
PHP8,860.48(exc. VAT)
Hager HMB MCB, 3P, 80A, 400V AC, 15 Breaking Capacity
  • RS Stock No. 602-105
  • Mfr. Part No. HMB380
Each
PHP53,478.89(exc. VAT)
Eaton AE/I23E Enclosure for use with AFDD, MCB, RCBO, RCD
  • RS Stock No. 248-281
  • Mfr. Part No. 029766 AE/I23E
Each
PHP10,263.53(exc. VAT)
Better World
Schneider Electric Compact NSX, Easy Pact CVS, FuPact INFB Crimp Lug for use with For copper cable 300 mm2
  • RS Stock No. 219-9402
  • Mfr. Part No. LV432503
Each
PHP9,477.77(exc. VAT)
ABB Tmax XT Undervoltage Release for use with Circuit Breaker
  • RS Stock No. 231-9366
  • Mfr. Part No. 1SDA104958R1 YU-C XT5-XT6 F/P 220.240Va
Each
PHP12,257.18(exc. VAT)
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX400/630 Circuit Breakers
  • RS Stock No. 260-8074
  • Mfr. Part No. C4036E400
Each
PHP196,389.43(exc. VAT)
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100 Circuit Breakers
  • RS Stock No. 260-9383
  • Mfr. Part No. C104TM016
Each
PHP12,519.55(exc. VAT)
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS3200
  • RS Stock No. 341-232
  • Mfr. Part No. C6AFM
Each
PHP316,424.51(exc. VAT)
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-377
  • Mfr. Part No. Mi 1684
Each
PHP73,042.07(exc. VAT)
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