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

294 of 999+
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7744
  • Mfr. Part No. C16B44V100
Each
PHP186,610.96(exc. VAT)
In Stock
Eaton PFIM RCD, 16A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 922-8648
  • Mfr. Part No. 235423 PFIM-16/2/003-A-MW
Each
PHP11,936.16(exc. VAT)
Temporarily out of stock
Siemens 5SM34 RCCB, 124A, 2 Pole, 100mA, Type A, 230V
  • RS Stock No. 328-427
  • Mfr. Part No. 5SM3415-6KK
Each
PHP29,764.23(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Connection Adapter for use with Compact Nsx 100/160/250
  • RS Stock No. 221-1185
  • Mfr. Part No. LV429306
Each
PHP1,935.20(exc. VAT)
Temporarily out of stock
ABB S801 Circuit Breaker, 1P, 10A Curve C, 690V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 287-6375
  • Mfr. Part No. 2CCS891001R0104
Each
PHP4,603.81(exc. VAT)
Temporarily out of stock
ABB SU200 M MCB, 1P, 1A Curve K, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-148
  • Mfr. Part No. 2CDS271337R0217
Each
PHP8,243.74(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3766
  • Mfr. Part No. 3VA2040-7HM36-0AA0
Each
PHP93,499.51(exc. VAT)
Temporarily out of stock
ABB RCBO, 20A Current Rating, 1P Poles, Type C
  • RS Stock No. 237-5240
  • Mfr. Part No. 2CSR275051R3204
Each
PHP11,405.44(exc. VAT)
Currently unavailable
Siemens SIRIUS 3 Phase Busbar, 690V
  • RS Stock No. 218-865
  • Mfr. Part No. 3RV2925-5AB
Each
PHP1,391.44(exc. VAT)
Temporarily out of stock
ABB Tmax XT Trip Unit for use with XT4
  • RS Stock No. 236-7295
  • Mfr. Part No. 1SDA067470R1 TMD 32-320 XT4 4p
Each
PHP43,725.78(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 32A Curve D, 400V AC, 60V DC, 30 kA Breaking Capacity
  • RS Stock No. 610-666
  • Mfr. Part No. 5SY8432-8
Each
PHP27,295.02(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4807
  • Mfr. Part No. 3VA2563-5KQ32-0AA0
Each
PHP311,913.01(exc. VAT)
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 231-9335
  • Mfr. Part No. 1SDA100389R1 XT5N630 TMA630-6300 4pFF N
Each
PHP162,772.89(exc. VAT)
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 500A, Fixed Mount
  • RS Stock No. 250-4190
  • Mfr. Part No. 1SDA054473R1
Each
PHP376,017.22(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 IZMX16B3-P08W-1 Electronic Circuit Breaker 800A , DIN Rail
  • RS Stock No. 127-542
  • Mfr. Part No. 183470 IZMX16B3-P08W-1
Each
PHP513,414.75(exc. VAT)
Temporarily out of stock
Mersen 40A Bolted Tag Fuse, A3, 460 V dc, 690V ac, 73mm
  • RS Stock No. 178-1111
  • Mfr. Part No. P1006585 / BTIS69V40
Each (In a Pack of 10)
PHP1,006.849(exc. VAT)
In Stock
Schurter PC Board Non Resettable Fuse, Radial 100mA, 250V ac
  • RS Stock No. 173-9770
  • Mfr. Part No. 0034.6605
Each (In a Bag of 100)
PHP23.265(exc. VAT)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IULN1 Single Pole Panel Mount, 40A Current Rating
  • RS Stock No. 275-0320
  • Mfr. Part No. IULN1-1-52-40.0
1 Box of 5
PHP28,676.21(exc. VAT)
In Stock
Littelfuse 0.125A Resettable Fuse, 30V dc
  • RS Stock No. 787-4186P
  • Mfr. Part No. 1206L012WR
Each (Supplied on a Reel)
PHP17.82(exc. VAT)
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