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

33502 Products showing for Fuses & Circuit Breakers

272 of 999+
Temporarily out of stock
Siemens, SENTRON MCCB 3P 15A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-630
  • Mfr. Part No. 3VA5195-5ED31-0AA0
Each
PHP26,252.28(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4022
  • Mfr. Part No. 3VA2110-8HM32-0AA0
Each
PHP88,275.45(exc. VAT)
Temporarily out of stock
Hager Hager NQN Circuit Breaker, 3P, 20A Curve B, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-814
  • Mfr. Part No. NQN320
Each
PHP20,363.18(exc. VAT)
Temporarily out of stock
Eaton RCCB, 63A, 2 Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 227-0741
  • Mfr. Part No. 264288 PFGM-63/2/03
Each
PHP5,967.80(exc. VAT)
Temporarily out of stock
Hager CDB RCCB, 63A, 4 Pole, 30mA, Type B, 230 → 400V ac
  • RS Stock No. 597-923
  • Mfr. Part No. CDB463F
Each
PHP119,224.20(exc. VAT)
Temporarily out of stock
Phoenix Contact Surge Protector, 8A, Plug In Mount
  • RS Stock No. 890-3792
  • Mfr. Part No. 2800906
Each
PHP3,577.51(exc. VAT)
Temporarily out of stock
Siemens SENTRON Motor Operator for use with 3VA20/21/22
  • RS Stock No. 155-948
  • Mfr. Part No. 3VA9267-0HC15
Each
PHP147,556.67(exc. VAT)
In Stock
Phoenix Contact 2 Phase Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 201-6257
  • Mfr. Part No. 2906820
Each
PHP7,536.38(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 3P, 5A Curve C, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-301
  • Mfr. Part No. 5SY4311-7
Each
PHP10,932.68(exc. VAT)
In Stock
Bourns Thermal Fuse +77°C 60 A, 28V
  • RS Stock No. 258-6394
  • Mfr. Part No. SA77SB0
Each (In a Pack of 10)
PHP43.56(exc. VAT)
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2316
  • Mfr. Part No. 2CCF800228R0001
Each
PHP566.12(exc. VAT)
Temporarily out of stock
Eaton NZM DC Link Kit for use with N4-4-(800)(1000)(1250)(1400)-S1(-S15)-DC, N4-4-...-S1(-S15)-PV-NA
  • RS Stock No. 127-214
  • Mfr. Part No. 180019 NZM4-4-XKVI1P
Each
PHP47,221.90(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 2P, 50A Curve D, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-539
  • Mfr. Part No. 5SY7250-8
Each
PHP17,316.19(exc. VAT)
Temporarily out of stock
Eaton xE?ect - FRCmM-NA RCCB, 63A, 4 Pole, 300mA, 240/415V ac
  • RS Stock No. 120-285
  • Mfr. Part No. 167112 FRCMM-63/4/03-G/A-NA
Each
PHP16,714.00(exc. VAT)
Temporarily out of stock
Eaton xEffect xE?ect - FAZ-NA-DC MCB MCB, 2P, 5A Curve C, 500V DC, 10 kA Breaking Capacity
  • RS Stock No. 103-942
  • Mfr. Part No. 137252 FAZ-C5/2-NA-DC
Each
PHP18,150.96(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Circuit Trip
  • RS Stock No. 212-0242
  • Mfr. Part No. LV431505
Each
PHP149,861.98(exc. VAT)
Temporarily out of stock
Siemens SENTRON Cover Frame for use with Motor Operator
  • RS Stock No. 210-9382
  • Mfr. Part No. 3VA9387-0SB30
Each
PHP3,883.02(exc. VAT)
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7296
  • Mfr. Part No. 1SDA067471R1 TMA 40-400 XT4 4p
Each
PHP43,725.78(exc. VAT)
Temporarily out of stock
ABB Tmax XT Front Terminal for use with XT4
  • RS Stock No. 237-6165
  • Mfr. Part No. 1SDA066934R1 MC CuAl 6x35 XT4 4PCS
Each
PHP17,596.76(exc. VAT)
Temporarily out of stock
Littelfuse PC Board Non Resettable Fuse, Axial 1A, 125V ac/dc
  • RS Stock No. 878-3703
  • Mfr. Part No. 0473001.MRT1L
Each (In a Pack of 50)
PHP85.60(exc. VAT)
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