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

1619 of 999+
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-309
  • Mfr. Part No. 3VA6210-8KT31-2AA0
Each
PHP310,105.11(exc. VAT)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 6.3A, 300V ac
  • RS Stock No. 769-3328
  • Mfr. Part No. SR-5H-6-3A-BK
Each (In a Pack of 5)
PHP58.96(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3768
  • Mfr. Part No. 3VA2040-7HM42-0AA0
Each
PHP114,443.15(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 210-1684
  • Mfr. Part No. 3VA1196-4EE46-0AA0
Each
PHP31,388.18(exc. VAT)
Temporarily out of stock
Better World
Eaton 160A Tag Fuse, 205 x 78 x 89mm, 1.5kV, 167mm
  • RS Stock No. 282-6224
  • Mfr. Part No. PV-160A-2XL-3BU-15
Each
PHP31,158.51(exc. VAT)
Temporarily out of stock
Better World
Eaton 350A Tag Fuse, 217 x 82 x 94mm, 1kV, 167mm
  • RS Stock No. 282-6233
  • Mfr. Part No. PV-315A-2XL-3B
Each
PHP31,237.63(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-211
  • Mfr. Part No. 3VA5220-6ED41-2AA0
Each
PHP179,489.56(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8149
  • Mfr. Part No. C40S4TM250D
Each
PHP192,880.69(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Linergy Mounting Plate for use with Busbar
  • RS Stock No. 211-8754
  • Mfr. Part No. AK5PA211N3
Each
PHP5,866.22(exc. VAT)
Temporarily out of stock
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0931
  • Mfr. Part No. 3WA9111-0EK43
1 Set
PHP18,976.57(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3915
  • Mfr. Part No. 3VA2063-8KQ42-0AA0
Each
PHP159,601.28(exc. VAT)
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 12 Way, 63 A
  • RS Stock No. 117-327
  • Mfr. Part No. FP VN 1200 GB
Each
PHP136,096.10(exc. VAT)
Temporarily out of stock
Eaton IZMX/INX Withdrawable Unit for use with INX40…3-…W, IZMX40…3-…W
  • RS Stock No. 132-339
  • Mfr. Part No. 183951 IZMX-CAS403-4000-1
Each
PHP359,874.67(exc. VAT)
Temporarily out of stock
ABB Tmax XT Auxiliary Contact for use with Tmax XT
  • RS Stock No. 237-6079
  • Mfr. Part No. 1SDA066455R1 XT2-XT4 W
Each
PHP7,391.54(exc. VAT)
In Stock
Eaton 20A NH Fuse, NH000, 690V ac
  • RS Stock No. 181-8440
  • Mfr. Part No. 20NHM000B-690
1 Box of 3
PHP1,692.15(exc. VAT)
Temporarily out of stock
ABB 63A Tag Fuse, 135 x 30 x 65mm, 500V
  • RS Stock No. 250-4423
  • Mfr. Part No. 1SCA022697R7060
1 Box of 3
PHP4,884.43(exc. VAT)
Temporarily out of stock
Lovato 3 Phase Surge Protector, 100kA
  • RS Stock No. 216-8289
  • Mfr. Part No. SA1B3NA320R
Each
PHP118,079.99(exc. VAT)
Temporarily out of stock
Siemens Sentron Connector Link for use with Busbar
  • RS Stock No. 228-8253
  • Mfr. Part No. 8US1921-2BE00
Each (In a Pack of 6)
PHP1,462.322(exc. VAT)
Temporarily out of stock
Mersen 2A Offset Tag Fuse, F1, 250 V dc, 550V ac
  • RS Stock No. 178-1002
  • Mfr. Part No. C1006643 / BNS55V2
Each (In a Pack of 10)
PHP244.265(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7641
  • Mfr. Part No. C11H4TM100L
Each
PHP59,792.00(exc. VAT)
1
1619
1676
Results per page

Related links