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

92 of 999+
Eaton 250A NH Fuse, 63 x 40 x 150mm, 500V ac
  • RS Stock No. 253-703
  • Mfr. Part No. 250NHG02BI
1 Pack of 3
PHP2,307.69(exc. VAT)
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS1600
  • RS Stock No. 341-236
  • Mfr. Part No. C7PWM
Each
PHP628,986.26(exc. VAT)
Better World
Schneider Electric, ComPacT NSX MCCB 4P 100A, Fixed Mount
  • RS Stock No. 254-6288
  • Mfr. Part No. C10F42D100
Each
PHP70,332.08(exc. VAT)
Siemens SIVACON S4 Busbar, 80mm Pitch
  • RS Stock No. 626-511
  • Mfr. Part No. 8PQ4000-2BA26
1 Set
PHP21,791.99(exc. VAT)
ABB RCBO, 16A Current Rating, 1P+N Poles, 10mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6950
  • Mfr. Part No. 2CSR275180R0164 DS201 M C16 A10
Each
PHP11,151.42(exc. VAT)
SENTRON Wire Connector for use with 3VA61/62 Series
  • RS Stock No. 263-588
  • Mfr. Part No. 3VA9243-0JK12
1 Kit
PHP16,201.71(exc. VAT)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 269-873
  • Mfr. Part No. 3VA6110-5HL31-2AA0
Each
PHP69,058.87(exc. VAT)
Better World
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 874-4402
  • Mfr. Part No. 3VA2225-5HL32-0AA0
Each
PHP75,291.65(exc. VAT)
Schneider Electric, ComPacT Circuit Breaker Accessory 3, 4, Fixed Mount
  • RS Stock No. 654-990
  • Mfr. Part No. 33511
Each
PHP137,555.07(exc. VAT)
Siemens SENTRON Connecting Terminals for use with Pin Busbars
  • RS Stock No. 202-7099
  • Mfr. Part No. 5ST3770-0HG
Each (In a Pack of 10)
PHP767.133(exc. VAT)
Schneider Electric Acti9 3 Phase Distribution Board, 8 Way, 250 A
  • RS Stock No. 339-831
  • Mfr. Part No. SEA9BPN8
Each
PHP67,884.96(exc. VAT)
ABB System Pro M Compact S200 M UC MCB, 1P, 1A, Type Z, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-314
  • Mfr. Part No. 2CDS271061R0218
Each
PHP11,583.35(exc. VAT)
Siemens SENTRON 5SJ4260 MCB, 2P, 60A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-816
  • Mfr. Part No. 5SJ4260-7HG41
Each
PHP26,130.70(exc. VAT)
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1727
  • Mfr. Part No. 3VA2140-5HL42-0AA0
Each
PHP46,778.86(exc. VAT)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9847
  • Mfr. Part No. 3VA1125-3GD46-0AA0
Each
PHP28,543.91(exc. VAT)
Schneider Electric Multi9 M9F1 MCB, 2P, 16A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-006
  • Mfr. Part No. M9F10216
Each
PHP6,133.31(exc. VAT)
Siemens SENTRON Support for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-583
  • Mfr. Part No. 3VW9011-0BB51
Each
PHP12,096.30(exc. VAT)
Schneider Electric Resi9 R9E MCB, 1P, 25A, 230V AC
  • RS Stock No. 357-827
  • Mfr. Part No. R9ETC625
Each
PHP26,707.89(exc. VAT)
ABB RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 201-6957
  • Mfr. Part No. 2CSR255180R1204 DS201 C20 A30
Each
PHP15,883.04(exc. VAT)
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0493
  • Mfr. Part No. KSB160DB412
Each
PHP103,400.45(exc. VAT)
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