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

1660 of 999+
Temporarily out of stock
Eaton Fuse Holder Installation Gauge
  • RS Stock No. 255-565
  • Mfr. Part No. 263152 Z-D02-D01/PE-16
1 Pack of 12
PHP239.86(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4121
  • Mfr. Part No. 3VA2116-8HL42-0AA0
Each
PHP129,788.97(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4755
  • Mfr. Part No. 3VA2163-7JQ46-0AA0
Each
PHP143,232.00(exc. VAT)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-263
  • Mfr. Part No. 3VA6210-8KQ41-2AA0
Each
PHP373,885.59(exc. VAT)
Temporarily out of stock
Eaton IZMX16H3-P10F-1 Electronic Circuit Breaker 1kA , Fixed
  • RS Stock No. 127-536
  • Mfr. Part No. 183466 IZMX16H3-P10F-1
Each
PHP580,808.65(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-4777
  • Mfr. Part No. 3VA2510-5JP42-0AA0
Each
PHP533,318.01(exc. VAT)
Temporarily out of stock
Better World
Siemens 5SV3 RCCB, 80A, 4 Pole, 300mA, 400V ac
  • RS Stock No. 211-9710
  • Mfr. Part No. 5SV3647-4KK14
Each
PHP105,807.10(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 4 channels
  • RS Stock No. 156-733
  • Mfr. Part No. 3VA2325-5KQ42-0AA0
Each
PHP287,735.55(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric MCCB 3P, Fixed Mount
  • RS Stock No. 178-7891
  • Mfr. Part No. LV426946
Each
PHP2,742.88(exc. VAT)
Temporarily out of stock
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-526
  • Mfr. Part No. 3VW9011-0AN75
1 Kit
PHP24,119.29(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4705
  • Mfr. Part No. 3VA2163-0MN36-0AA0
Each
PHP65,338.26(exc. VAT)
Temporarily out of stock
Eaton Eaton Distribution Parts 1+N Phase Busbar Connector
  • RS Stock No. 253-564
  • Mfr. Part No. 263951 ZV-L1/N-80A-36
1 Pack of 36
PHP1,356.15(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9446
  • Mfr. Part No. 3VA1196-3ED46-0AA0
Each
PHP28,348.59(exc. VAT)
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2335
  • Mfr. Part No. 2CCF800247R0001
Each
PHP1,243.21(exc. VAT)
Temporarily out of stock
Siemens Alpha Assembly Kit for use with Unequipped Distribution Boards
  • RS Stock No. 209-7091
  • Mfr. Part No. 8GK4553-3KK12
Each
PHP9,106.18(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-510
  • Mfr. Part No. 3VA5220-5EF31-2AA0
Each
PHP107,283.09(exc. VAT)
Temporarily out of stock
ABB Tmax Plug In Unit for use with T5
  • RS Stock No. 237-5977
  • Mfr. Part No. 1SDA054769R1 T5 630 WFP-VR
Each
PHP61,756.90(exc. VAT)
Last RS stock
onsemi Thermal Fuse +125°C 3 A, 5V
  • RS Stock No. 195-8755
  • Mfr. Part No. NIS6350MT2TXG
Each (In a Pack of 250)
PHP64.505(exc. VAT)
Temporarily out of stock
Siemens ALPHA Mounting Plate for use with ALPHA DIN Installation Distributor
  • RS Stock No. 272-0346
  • Mfr. Part No. 8GK4452-1KK12
Each
PHP4,990.89(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9380
  • Mfr. Part No. 3VA9384-0JB13
Each
PHP11,878.42(exc. VAT)
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