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

317 of 999+
In Stock
Littelfuse SMD Non Resettable Fuse 750mA, 125V
  • RS Stock No. 738-2835
  • Mfr. Part No. 0452.750MRL
Each (In a Pack of 10)
PHP46.93(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 229-874
  • Mfr. Part No. 113344 NZMH2-S100-SVE
Each
PHP56,962.57(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8054
  • Mfr. Part No. C25W42D250
Each
PHP255,444.33(exc. VAT)
Currently unavailable
RS PRO 32A Slotted Tag Fuse, A1, 250 V dc, 415V ac, 44.5mm
  • RS Stock No. 221-3700
Each (In a Pack of 10)
PHP468.257(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 4P, 40A Curve D, 440V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 664-326
  • Mfr. Part No. 5SY8440-8
Each
PHP33,458.41(exc. VAT)
In Stock
DRM-A Fuse F 1A (Gold) F 125VDC 250VAC
  • RS Stock No. 577-243
  • Mfr. Part No. 3-133-753
Each
PHP431.88(exc. VAT)
Unavailable
Schneider Electric 440V ac Circuit Trip for use with Compact NSX 400/630 Circuit Breakers
  • RS Stock No. 219-9424
  • Mfr. Part No. LV433930
Each
PHP327,841.87(exc. VAT)
Temporarily out of stock
Eaton IZMX/INX Cassette for use with INX16…4-…W, IZMX16…4-…W
  • RS Stock No. 132-945
  • Mfr. Part No. 183956 IZMX-CAS164-1600-SEC-1
Each
PHP203,446.92(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-511
  • Mfr. Part No. 3VA6110-5KQ31-2AA0
Each
PHP184,743.47(exc. VAT)
Last RS stock
RS PRO 40A Bolted Tag Fuse, A3, 250 V dc, 690V ac, 73mm
  • RS Stock No. 221-3715
Each
PHP857.70(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-299
  • Mfr. Part No. 3VA6440-6JP41-2AA0
Each
PHP570,560.43(exc. VAT)
Temporarily out of stock
ABB Shunt Opening Release for use with Fixed Plug-In XT1-XT4
  • RS Stock No. 192-0920
  • Mfr. Part No. 1SDA066324R1
Each
PHP8,163.12(exc. VAT)
Temporarily out of stock
Rittal Earthing Strap 25mm Diameter
  • RS Stock No. 265-1245
  • Mfr. Part No. 2566000
Each (In a Pack of 5)
PHP665.124(exc. VAT)
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 200mA, 250V ac
  • RS Stock No. 769-3202
  • Mfr. Part No. SR-5-200MA-BK
Each (In a Pack of 10)
PHP63.688(exc. VAT)
In Stock
Eaton 5A British Standard Fuse, 240V ac, 37.4mm
  • RS Stock No. 414-718
  • Mfr. Part No. GSA5
Each (In a Pack of 5)
PHP1,334.804(exc. VAT)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 852-7196
  • Mfr. Part No. PCC-2-R
Each
PHP382.34(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-260
  • Mfr. Part No. 3VA6440-8KQ31-0AA0
Each
PHP417,139.02(exc. VAT)
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 25A Curve B, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 247-668
  • Mfr. Part No. 132764 FAZ-B25/2-RT
Each
PHP8,943.93(exc. VAT)
Temporarily out of stock
Eaton Fuse Holder Push-in Gauge Ring
  • RS Stock No. 232-044
  • Mfr. Part No. 110790 Z-DII/PE-16A
1 Pack of 50
PHP1,965.70(exc. VAT)
Temporarily out of stock
Hager RCBO, 40A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 602-209
  • Mfr. Part No. ADM490C
Each
PHP48,301.45(exc. VAT)
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