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

130 of 999+
Eaton 175A DIN Rail Mount Fuse Block, 600V ac/dc
  • RS Stock No. 850-7098
  • Mfr. Part No. PDBFS220
Each (In a Pack of 3)
PHP6,700.413(exc. VAT)
Better World
Siemens RCBO, 13A Current Rating, 3P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6204
  • Mfr. Part No. 5SU1336-6FP13
Each
PHP21,383.16(exc. VAT)
Siemens 80A Centred Tag Fuse, NH00, 500V ac
  • RS Stock No. 203-2165
  • Mfr. Part No. 3NA7824-7
Each (In a Pack of 3)
PHP560.563(exc. VAT)
Littelfuse 1.1A Resettable Fuse, 30V dc
  • RS Stock No. 517-6770
  • Mfr. Part No. RUEF110
Each (In a Pack of 10)
PHP16.236(exc. VAT)
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4810
  • Mfr. Part No. 3VA2563-5MP32-0AA0
Each
PHP192,450.99(exc. VAT)
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 9 kA, Withdrawable
  • RS Stock No. 246-844
  • Mfr. Part No. 191561 NZMH3-VX630-T-AVE
Each
PHP339,062.91(exc. VAT)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 32A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9890
  • Mfr. Part No. 3VA1132-4GD42-0AA0
Each
PHP27,641.54(exc. VAT)
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 232-060
  • Mfr. Part No. 110903 NZMN3-4-AE400/250-T
Each
PHP241,632.73(exc. VAT)
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 243-045
  • Mfr. Part No. 191637 NZMN2-4-VX250-SVE
Each
PHP159,671.14(exc. VAT)
RS PRO Earthing Strap
  • RS Stock No. 746-7384
Each
PHP201.69(exc. VAT)
Phoenix Contact Thermal Circuit Breaker - Single Pole 32V dc Voltage Rating Base Mounting, 5A Current Rating
  • RS Stock No. 608-100
  • Mfr. Part No. 1499963
Each
PHP489.12(exc. VAT)
Eaton 125A Neutral Link, 22mm x 58mm
  • RS Stock No. 703-8526
  • Mfr. Part No. C22NL
Each (In a Pack of 10)
PHP361.469(exc. VAT)
Sensata Airpax Airpax Thermal Circuit Breaker - IEG6 Single Pole Panel Mount, 45A Current Rating
  • RS Stock No. 275-0200
  • Mfr. Part No. IEG6-1-51-45.0-A-01-V
1 Box of 5
PHP15,911.28(exc. VAT)
Eaton NZM Jumper Link for use with N3-4-320(400)-S1(-S15)-DC
  • RS Stock No. 120-243
  • Mfr. Part No. 168593 NZM3-4-XKV1P
Each
PHP50,631.41(exc. VAT)
Better World
Siemens 5sV3 RCCB, 80A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 211-9653
  • Mfr. Part No. 5SV3347-6KL
Each
PHP57,633.96(exc. VAT)
Eaton, Eaton Moeller Series NZM MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 231-225
  • Mfr. Part No. 109680 NZMN3-S250
Each
PHP142,149.84(exc. VAT)
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 100 kA, Plug In
  • RS Stock No. 230-498
  • Mfr. Part No. 119741 NZMH3-AE630-T-S1
Each
PHP336,863.59(exc. VAT)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9447
  • Mfr. Part No. 3VA1196-3GD42-0AA0
Each
PHP29,126.30(exc. VAT)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 14 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-538
  • Mfr. Part No. 3VA5112-4ED41-0AA0
Each
PHP76,471.88(exc. VAT)
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 200A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 229-915
  • Mfr. Part No. 113237 NZMC2-4-A200/125-SVE
Each
PHP122,502.51(exc. VAT)
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