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

1664 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3690
  • Mfr. Part No. 3VA2025-7KQ32-0AA0
Each
PHP154,833.93(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 80A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9434
  • Mfr. Part No. 3VA1180-6GD42-0AA0
Each
PHP37,773.08(exc. VAT)
Temporarily out of stock
ABB RCBO, 40A Current Rating, 1P Poles, Type C
  • RS Stock No. 237-5235
  • Mfr. Part No. 2CSR275051R2404
Each
PHP12,609.63(exc. VAT)
Temporarily out of stock
Eaton RCBO, 10A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type A, Type D, FRBm6 Range
  • RS Stock No. 123-376
  • Mfr. Part No. 170967 FRBM6-D10/3N/03-A
Each
PHP16,494.17(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 125mA, 125V
  • RS Stock No. 738-2905P
  • Mfr. Part No. 0154.125DR
Each (Supplied on a Reel)
PHP136.62(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4514
  • Mfr. Part No. 3VA2125-0KQ42-0AA0
Each
PHP167,013.65(exc. VAT)
Temporarily out of stock
ALPHA 630 DIN, Abdeckung Höhe=450mm, Bre
  • RS Stock No. 229-9882
  • Mfr. Part No. 8GK9601-3KK31
Each (In a Pack of 10)
PHP7,774.493(exc. VAT)
Temporarily out of stock
Siemens 2A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6905
  • Mfr. Part No. 3NA6802-6
Each (In a Pack of 3)
PHP4,587.617(exc. VAT)
Temporarily out of stock
Eaton Fuse Holder Installation Gauge
  • RS Stock No. 255-352
  • Mfr. Part No. 263151 Z-D02-D01/PE-10
1 Pack of 12
PHP239.86(exc. VAT)
Temporarily out of stock
ABB Tmax XT Rear Terminal for use with XT3
  • RS Stock No. 237-6172
  • Mfr. Part No. 1SDA066954R1 R x RC XT3 4PCS
Each
PHP11,734.31(exc. VAT)
Temporarily out of stock
Lovato 32A Rail Mount Fuse Holder, 2P, 1kV
  • RS Stock No. 216-8278
  • Mfr. Part No. FB01D2P
Each
PHP1,524.76(exc. VAT)
Temporarily out of stock
Littelfuse PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 895-1681
  • Mfr. Part No. 38212000410
Each (In a Pack of 10)
PHP46.283(exc. VAT)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2738
  • Mfr. Part No. 2906823
Each
PHP8,747.68(exc. VAT)
Temporarily out of stock
Siemens SENTRON 3VA9 Mounting Kit for use with 3VA2 100/160/250
  • RS Stock No. 218-1800
  • Mfr. Part No. 3VA9126-0SS10
Each
PHP1,362.23(exc. VAT)
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2330
  • Mfr. Part No. 2CCF800242R0001
Each
PHP1,067.36(exc. VAT)
Temporarily out of stock
Siemens SENTRON Trip Alarm Switch
  • RS Stock No. 277-0752
  • Mfr. Part No. 3WA9111-0AH02
1 Set
PHP7,015.09(exc. VAT)
Temporarily out of stock
Siemens 100A Centred Tag Fuse, NH1, 1kV
  • RS Stock No. 230-2985
  • Mfr. Part No. 3NE1221-4
Each (In a Pack of 2)
PHP10,514.92(exc. VAT)
In Stock
Schurter SMD Non Resettable Fuse 250mA, 125 V ac, 63V dc
  • RS Stock No. 754-6326P
  • Mfr. Part No. 3413.0010.22
Each (Supplied on a Reel)
PHP47.239(exc. VAT)
Temporarily out of stock
Siemens ALPHA Connecting Terminals for use with ALPHA 400-ZS
  • RS Stock No. 216-5994
  • Mfr. Part No. 8GS4034-3
Each
PHP2,045.08(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3779
  • Mfr. Part No. 3VA2116-6KP46-0AA0
Each
PHP189,096.87(exc. VAT)
1
1664
1674
Results per page

Related links