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

33502 Products showing for Fuses & Circuit Breakers

187 of 999+
In Stock
Siemens ALPHA Distribution Board, 12 Way
  • RS Stock No. 211-6076
  • Mfr. Part No. 8GB1371-2
Each
PHP7,593.02(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, PowerPact MCCB 3P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 219-8420
  • Mfr. Part No. NHJF36100TW
Each
PHP76,048.32(exc. VAT)
In Stock
Schneider Electric Acti9 iID RCCB, 80A, 2 Pole, 300mA, Type AC, 220 → 240V ac
  • RS Stock No. 130-795
  • Mfr. Part No. A9R14280
Each
PHP19,014.69(exc. VAT)
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 25A Curve C, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 244-029
  • Mfr. Part No. 102172 FAZ-C25/2-NA
Each
PHP11,216.57(exc. VAT)
In Stock
Better World
Schneider Electric Industrial Surge Protection, 5kA, DIN Rail Mount
  • RS Stock No. 247-1960
  • Mfr. Part No. A9L20501
Each
PHP15,627.73(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 220A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 212-0276
  • Mfr. Part No. LV433577
Each
PHP186,324.43(exc. VAT)
Temporarily out of stock
Eaton Distribution Parts 1+N Phase Busbar Connector
  • RS Stock No. 256-034
  • Mfr. Part No. 263943 ZV-L1/N-100
1 Pack of 100
PHP2,526.25(exc. VAT)
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0823
  • Mfr. Part No. 3WA9111-0AV24
Each
PHP5,064.18(exc. VAT)
Limited stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 10A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1372
  • Mfr. Part No. 5SY4310-7
Each
PHP5,368.32(exc. VAT)
Temporarily out of stock
Phoenix Contact 3 Phase Surge Protector, 80kA, 2000V (Volts), DIN Rail Mount
  • RS Stock No. 131-669
  • Mfr. Part No. 2910380
Each
PHP42,505.90(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels
  • RS Stock No. 156-821
  • Mfr. Part No. 3VA2225-8KQ32-0AA0
Each
PHP244,206.41(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 5A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-722
  • Mfr. Part No. 3VA5105-1MH31-0AA0
Each
PHP34,278.32(exc. VAT)
In Stock
Phoenix Contact 3 Phase Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2802
  • Mfr. Part No. 2909637
Each
PHP17,212.52(exc. VAT)
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0292
  • Mfr. Part No. 8GK1061-5KK30
Each
PHP119,943.56(exc. VAT)
In Stock
Eaton 4A Resettable Fuse, 6V
  • RS Stock No. 225-8298
  • Mfr. Part No. PTSLR18126V400
1 Reel of 2000
PHP103,163.72(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 2P, 1.6A Curve C, 230V AC, 60V DC, 70 kA Breaking Capacity
  • RS Stock No. 610-364
  • Mfr. Part No. 5SY8515-7
Each
PHP6,831.09(exc. VAT)
In Stock
Better World
Schneider Electric, Acti 9, Clario, Librio, Prodis MCCB, DIN Rail Mount
  • RS Stock No. 248-3690
  • Mfr. Part No. A9N26476
Each
PHP5,713.35(exc. VAT)
Temporarily out of stock
Schneider Electric PowerPact Thermal Magnetic Circuit Breaker - PowerPacT 2 Pole 525V ac Voltage Rating Clip-On, 25A
  • RS Stock No. 339-334
  • Mfr. Part No. BGL26025LU
Each
PHP26,660.38(exc. VAT)
Temporarily out of stock
Eaton 125A NH Fuse, 63 x 40 x 150mm, 400V ac
  • RS Stock No. 241-509
  • Mfr. Part No. 125NHG02B-400
1 Pack of 3
PHP2,210.77(exc. VAT)
In Stock
Better World
Schneider Electric Cable Connector for use with Compact Nsx, Easypact Cvs
  • RS Stock No. 221-1231
  • Mfr. Part No. LV432482
Each
PHP18,745.88(exc. VAT)
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