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

195 of 999+
In Stock
Siemens 90 → 110V ac Shunt Trip Circuit Trip for use with 3RV2 Series Circuit Breakers
  • RS Stock No. 706-1942
  • Mfr. Part No. 3RV2902-1DF0
Each
PHP3,157.54(exc. VAT)
Temporarily out of stock
Siemens 125A Tag Fuse, 78.5mm, 690V
  • RS Stock No. 608-821
  • Mfr. Part No. 3NE8822-0MK
1 Pack of 3
PHP9,663.32(exc. VAT)
In Stock
Siemens SENTRON 5SY4 MCB, 2P, 20A, Type A, 230V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 610-435
  • Mfr. Part No. 5SY4520-5
Each
PHP5,913.92(exc. VAT)
Temporarily out of stock
Siemens SENTRON 3VA9 Kit for use with 3VA1 400/630, 3VA2 400/630
  • RS Stock No. 218-1846
  • Mfr. Part No. 3VA9324-0KD00
Each
PHP107,605.51(exc. VAT)
Temporarily out of stock
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 203-389
  • Mfr. Part No. 1STQ007412A0000
Each
PHP87,692.79(exc. VAT)
In Stock
Better World
Schneider Electric iC60 RCD, 25A, 2 Pole, 300mA, Type AC
  • RS Stock No. 734-9062
  • Mfr. Part No. A9Q14225
Each
PHP18,874.63(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 125A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-254
  • Mfr. Part No. 3VA5112-5ED11-0AA0
Each
PHP29,027.82(exc. VAT)
Temporarily out of stock
Eaton xEnergy Basic Distribution Board Enclosure
  • RS Stock No. 230-626
  • Mfr. Part No. 116661 BPM-O-600/12-P
Each
PHP81,814.96(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4105
  • Mfr. Part No. 3VA2116-7JQ36-0AA0
Each
PHP163,098.59(exc. VAT)
In Stock
Bourns Surface Mount Fuse 7A, 48V dc
  • RS Stock No. 245-9232
  • Mfr. Part No. SF-1206F700M-2
Each (On a Tape of 10)
PHP37.436(exc. VAT)
Temporarily out of stock
Mersen 355A Bolted Tag Fuse, C1, 460 V dc, 690V ac, 133mm
  • RS Stock No. 178-1145
  • Mfr. Part No. S1006634 / BTM69V355
Each
PHP10,448.09(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 232-057
  • Mfr. Part No. 110890 NZMN3-AE630-T
Each
PHP234,155.01(exc. VAT)
In Stock
Bourns Thermal Fuse +85°C 80 A, 28V
  • RS Stock No. 258-6367
  • Mfr. Part No. HC85AY-1
Each (In a Pack of 10)
PHP77.385(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3339
  • Mfr. Part No. A9DV3640
Each
PHP20,966.79(exc. VAT)
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 250V ac Voltage Rating DIN Rail, 6A Current Rating
  • RS Stock No. 135-494
  • Mfr. Part No. 0914688
1 Pack of 6
PHP29,387.67(exc. VAT)
Temporarily out of stock
Schneider Electric PowerPact multistandard Circuit Breaker for use with Distribution
  • RS Stock No. 119-223
  • Mfr. Part No. NHDF36100TW
Each
PHP52,103.94(exc. VAT)
In Stock
Deltron Earthing Strap
  • RS Stock No. 181-1267
  • Mfr. Part No. 4ELM6
Each
PHP242.58(exc. VAT)
In Stock
Eaton Moeller xPole 3 Phase Busbar, 500V
  • RS Stock No. 252-823
  • Mfr. Part No. 215639 EVG-3PHAS/12MODUL
Each
PHP755.10(exc. VAT)
Temporarily out of stock
ABB Tmax T Shunt Closing Release for use with Circuit Breaker
  • RS Stock No. 232-0162
  • Mfr. Part No. 1SDA063550R1 T7M-X1 230VAC/DC
Each
PHP13,043.97(exc. VAT)
Last RS stock
RS PRO 50A Bolted Tag Fuse, A3, 690V ac, 73mm
  • RS Stock No. 221-3716
Each (In a Pack of 10)
PHP763.95(exc. VAT)
1
195
1676
Results per page

Related links