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

132 of 999+
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 4P, 50A Curve C, 440V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 664-327
  • Mfr. Part No. 5SY8450-7
Each
PHP33,825.28(exc. VAT)
In Stock
Eaton RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type A, Type C, PXK Range
  • RS Stock No. 203-9036
  • Mfr. Part No. 236966 PXK-C25/1N/003-A
Each
PHP12,589.98(exc. VAT)
Temporarily out of stock
Siemens SENTRON Padlock Device
  • RS Stock No. 277-0870
  • Mfr. Part No. 3WA9111-0BA84
Each
PHP44,621.86(exc. VAT)
Temporarily out of stock
Miniature circuit breaker, 32 A, 1p
  • RS Stock No. 611-275
  • Mfr. Part No. PLSM-D32-Q-MW
Each
PHP2,786.73(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 18.5 kA, Fixed Mount
  • RS Stock No. 231-439
  • Mfr. Part No. 107616 NZMB2-AF40-BT-NA
Each
PHP40,980.79(exc. VAT)
Temporarily out of stock
Schneider Electric Communication Module for use with ComPact NS630b to NS1600 Series Circuit Breaker
  • RS Stock No. 247-1860
  • Mfr. Part No. 33702
Each
PHP64,272.22(exc. VAT)
Temporarily out of stock
ABB 250A Tag Fuse, 150 x 40 x 72mm, 690V
  • RS Stock No. 250-4474
  • Mfr. Part No. 1SCA022701R0700
1 Box of 3
PHP6,298.80(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 125A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 229-543
  • Mfr. Part No. 113226 NZMC2-S125-SVE
Each
PHP65,906.50(exc. VAT)
In Stock
SIBA 250A NH Fuse, NH1, 500V ac
  • RS Stock No. 543-9920
  • Mfr. Part No. 4184219
Each
PHP1,059.09(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 40A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-393
  • Mfr. Part No. 3VA5140-6ED21-1AA0
Each
PHP27,977.77(exc. VAT)
In Stock
Littelfuse 3A Resettable Fuse, 72V
  • RS Stock No. 517-6742
  • Mfr. Part No. RXEF300
Each (In a Pack of 10)
PHP43.164(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 14 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-459
  • Mfr. Part No. 3VA5110-4ED31-1AA0
Each
PHP44,441.74(exc. VAT)
Temporarily out of stock
Legrand Single Phase Surge Arrester, 12kA, 1.2kV, DIN Rail Mount
  • RS Stock No. 266-0220
  • Mfr. Part No. 0 039 51
Each
PHP36,434.66(exc. VAT)
Temporarily out of stock
ABB Plastic Consumer Unit, IP65 1SLM006501A
  • RS Stock No. 286-4982
  • Mfr. Part No. 1SLM006501A2216
Each
PHP8,689.73(exc. VAT)
Temporarily out of stock
Schneider Electric IKQ RCD, 80A, 4 Pole, 30mA, 400V ac
  • RS Stock No. 339-382
  • Mfr. Part No. SED80034
Each
PHP28,644.18(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 6 kA, Fixed Mount
  • RS Stock No. 240-938
  • Mfr. Part No. 191659 NZMS2-4-VX100
Each
PHP90,832.21(exc. VAT)
In Stock
Better World
Schneider Electric 1+N Phase Surge Protector, 2kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 776-3880
  • Mfr. Part No. A9L16298
Each
PHP22,547.62(exc. VAT)
In Stock
RS PRO 20A Yellow Blade Car Fuse, 32V dc
  • RS Stock No. 563-560
Each (In a Pack of 10)
PHP36.611(exc. VAT)
Temporarily out of stock
xEnergy Basic Distribution Board Enclosure
  • RS Stock No. 252-401
  • Mfr. Part No. 195325 BPM-O-1100/11-P-EP
Each
PHP76,463.27(exc. VAT)
Temporarily out of stock
Siemens SENTRON Signalling Module
  • RS Stock No. 277-0758
  • Mfr. Part No. 3WA9111-0AH12
Each
PHP30,091.25(exc. VAT)
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