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

33503 Products showing for Fuses & Circuit Breakers

327 of 999+
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IUGN1 Single Pole Panel Mount, 5A Current Rating
  • RS Stock No. 275-0276
  • Mfr. Part No. IUGN1-1-62-5.00-U
Each
PHP4,784.97(exc. VAT)
Temporarily out of stock
Hager CDB RCCB, 63A, 4 Pole, 30mA, Type B, 230 → 400V ac
  • RS Stock No. 597-922
  • Mfr. Part No. CDB463E
Each
PHP145,727.89(exc. VAT)
Temporarily out of stock
Phoenix Contact 2 Phase Surge Protector, 40kA, DIN Rail Mount
  • RS Stock No. 201-6714
  • Mfr. Part No. 2905338
Each
PHP26,117.41(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-4841
  • Mfr. Part No. 3VA1025-4ED32-0AA0
Each
PHP19,401.20(exc. VAT)
Temporarily out of stock
SENTRON Wire Connector for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-982
  • Mfr. Part No. 3VA9673-0JC34
1 Kit
PHP50,157.51(exc. VAT)
In Stock
Siemens Fuse Holder Diazed Adapter Screw
  • RS Stock No. 202-7222
  • Mfr. Part No. 5SH313
Each (In a Pack of 25)
PHP66.846(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 16 kA, Fixed Mount
  • RS Stock No. 271-9570
  • Mfr. Part No. 3VA10252ED360AA0
Each
PHP20,523.88(exc. VAT)
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 2A, 125V ac
  • RS Stock No. 226-0816
  • Mfr. Part No. 3951200000
Each (In a Pack of 10)
PHP82.832(exc. VAT)
Temporarily out of stock
ABB S804S MCB, 4P, 63A, UC-B, 750V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-816
  • Mfr. Part No. 2CCS864001R1635
Each
PHP41,522.50(exc. VAT)
Temporarily out of stock
Eaton IZMX/INX Door Sealing Frame for use with INX40…WIZMX40…W
  • RS Stock No. 132-395
  • Mfr. Part No. 184139 IZMX-DEG40-W-1
Each
PHP13,405.94(exc. VAT)
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 20A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-003
  • Mfr. Part No. 2CDS274061R0487
Each
PHP53,156.72(exc. VAT)
Temporarily out of stock
Better World
ABB, XT4H MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-6793
  • Mfr. Part No. 1SDA068532R1 XT4H 160 Ekip LS/I 63A FF
Each
PHP96,202.87(exc. VAT)
Temporarily out of stock
ABB S801S MCB, 1P, 125A, UC-K, 250V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-706
  • Mfr. Part No. 2CCS861001R1647
Each
PHP13,860.41(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4108 MCB, 1P, 8A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-885
  • Mfr. Part No. 5SJ4108-8HG42
Each
PHP4,743.22(exc. VAT)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 100/160/250 Circuit Breakers
  • RS Stock No. 260-9378
  • Mfr. Part No. C1047E100
Each
PHP167,900.58(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 7.5 kA, Plug In
  • RS Stock No. 230-845
  • Mfr. Part No. 112798 NZMH1-A40-SVE
Each
PHP40,394.31(exc. VAT)
Temporarily out of stock
Eaton 160A NH Fuse, 63 x 40 x 150mm, 400V ac
  • RS Stock No. 240-195
  • Mfr. Part No. 160NHG02BI-400
1 Pack of 3
PHP2,575.49(exc. VAT)
Temporarily out of stock
SENTRON for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-607
  • Mfr. Part No. 3VA9477-0CK12
1 Kit
PHP81,506.23(exc. VAT)
In Stock
Siemens 80A Slotted Tag Fuse, NH000, 690V
  • RS Stock No. 230-3018
  • Mfr. Part No. 3NE8720-1
Each (In a Pack of 10)
PHP3,414.592(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 25A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-7917
  • Mfr. Part No. LV426705
Each
PHP85,297.26(exc. VAT)
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