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

315 of 999+
Temporarily out of stock
Better World
Siemens SENTRON 5SV3xxx RCCB, 63A, 4 Pole, 500mA, Type B, 400V ac
  • RS Stock No. 241-4449
  • Mfr. Part No. 5SV3746-4
Each
PHP68,661.06(exc. VAT)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA1 Molded Case Circuit Breakers
  • RS Stock No. 629-294
  • Mfr. Part No. 8GK4731-3KK22
Each
PHP14,087.75(exc. VAT)
Temporarily out of stock
Eaton BB-EV 1 Phase Busbar, 1000V, 36mm Pitch
  • RS Stock No. 244-228
  • Mfr. Part No. 168834 BB-EVF-10/1P-2MU
Each
PHP2,587.87(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-210
  • Mfr. Part No. 3VA5220-6ED41-0AA0
Each
PHP168,086.61(exc. VAT)
Temporarily out of stock
Eaton Switch Disconnector for use with Circuit Breaker
  • RS Stock No. 228-776
  • Mfr. Part No. CCP2-1-100CF
1 Pack of 6
PHP111,701.30(exc. VAT)
Being discontinued
ETA Mounting Base for use with 1170 Circuit Breaker
  • RS Stock No. 537-2726
  • Mfr. Part No. 1170-6-WAY BASE + LID+EXTENTION
Each
PHP4,733.66(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4163 MCB, 1P, 63A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-852
  • Mfr. Part No. 5SJ4163-8HG40
Each
PHP9,218.24(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3358
  • Mfr. Part No. A9DX2640
Each
PHP30,134.72(exc. VAT)
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 2.5A, 250V ac
  • RS Stock No. 169-9530
  • Mfr. Part No. SS-5-2-5A-BK
Each (In a Bag of 200)
PHP59.287(exc. VAT)
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - AP17 2 Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0176
  • Mfr. Part No. AP17-1R-65F-103
Each
PHP64,369.14(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Linergy Busbar, 690V, 60mm Pitch
  • RS Stock No. 211-2310
  • Mfr. Part No. LA9ZA32428
Each (In a Pack of 4)
PHP7,461.928(exc. VAT)
Temporarily out of stock
Siemens SENTRON Guide Frame for use with Circuit Breaker 3VA27
  • RS Stock No. 265-567
  • Mfr. Part No. 3VW8116-7AB01
Each
PHP123,162.31(exc. VAT)
New product - Preorder today
FUSE 125V PICO II FA RoHS 10A
  • RS Stock No. 552-979
  • Mfr. Part No. 0251010.MAT1L
1 Bag of 100
PHP3,984.59(exc. VAT)
Temporarily out of stock
Miniature circuit breaker, 3 A, 1p
  • RS Stock No. 611-264
  • Mfr. Part No. PLSM-C3-Q-MW
Each
PHP2,422.80(exc. VAT)
Temporarily out of stock
315A Tag Fuse, 72 x 150mm, 690V
  • RS Stock No. 262-482
  • Mfr. Part No. 315NHM3B-690
1 Pack of 3
PHP7,765.51(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 35A, Breaking Capacity 14 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-358
  • Mfr. Part No. 3VA5135-4ED21-1AA0
Each
PHP32,537.83(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4569
  • Mfr. Part No. 3VA2125-7JQ32-0AA0
Each
PHP137,181.55(exc. VAT)
Temporarily out of stock
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 300mA
  • RS Stock No. 200-6019
  • Mfr. Part No. 5SV3646-4
Each
PHP68,661.06(exc. VAT)
Temporarily out of stock
Hager BDF Series RCCB, 63A, 2 Pole, 30mA, Type F
  • RS Stock No. 597-898
  • Mfr. Part No. BDF263
Each
PHP58,758.46(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
  • RS Stock No. 155-867
  • Mfr. Part No. 3VA2440-7MQ32-0AA0
Each
PHP281,095.64(exc. VAT)
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