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

94 of 999+
Temporarily out of stock
Siemens 200A Centred Tag Fuse, NH1, 690V ac
  • RS Stock No. 397-339
  • Mfr. Part No. 3NE1225-0
Each (In a Pack of 3)
PHP17,847.567(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 2P 225A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-791
  • Mfr. Part No. 3VA5222-5EC61-0AA0
Each
PHP84,932.35(exc. VAT)
In Stock
Weidmuller 1 Phase Surge Protector, 16A, DIN Rail Mount
  • RS Stock No. 249-3334
  • Mfr. Part No. 1351650000
Each
PHP7,184.49(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4316 MCB, 3P, 16A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-945
  • Mfr. Part No. 5SJ4316-8HG42
Each
PHP18,332.86(exc. VAT)
In Stock
Eaton 208 → 250V ac/dc Shunt Trip Shunt trip for use with N(S)1(-4) Series, NZM1(-4) Series
  • RS Stock No. 454-8219
  • Mfr. Part No. 259726 NZM1-XA208-250AC/DC
Each
PHP8,956.69(exc. VAT)
Temporarily out of stock
Eaton MCB, 3P, 10A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 248-601
  • Mfr. Part No. 101326 PLI-D10/3
Each
PHP9,457.11(exc. VAT)
Temporarily out of stock
Eaton Fuse Holder Fuse Holder
  • RS Stock No. 261-465
  • Mfr. Part No. FRN01C
1 Pack of 15
PHP8,049.12(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 36 kA
  • RS Stock No. 209-6800
  • Mfr. Part No. 3VA1132-4GF46-0AA0
Each
PHP36,537.10(exc. VAT)
In Stock
RS PRO Industrial Surge Protector, 40kA, 5.3kV, DIN Rail Mount
  • RS Stock No. 101-777
Each
PHP5,142.24(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 4 channels
  • RS Stock No. 155-845
  • Mfr. Part No. 3VA2440-7HK42-0AA0
Each
PHP302,491.14(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 7.5 kA, Plug In
  • RS Stock No. 230-791
  • Mfr. Part No. 115794 NZMH1-M100-SVE
Each
PHP54,103.44(exc. VAT)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 125A, Fixed Mount
  • RS Stock No. 254-6344
  • Mfr. Part No. C16F3TM125
Each
PHP52,316.74(exc. VAT)
Temporarily out of stock
Siemens 80A DIV Diazed Fuse, gG, 500V ac
  • RS Stock No. 396-023
  • Mfr. Part No. 5SC211
Each (In a Pack of 3)
PHP2,071.727(exc. VAT)
In Stock
Better World
ABB, Protecta MCCB 3P 250A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 831-9181
  • Mfr. Part No. 1SDA068208R1 XT1D 160 3p F F
Each
PHP25,839.72(exc. VAT)
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - Single Pole 32V dc Voltage Rating Base Mounting, 7.5A Current Rating
  • RS Stock No. 609-775
  • Mfr. Part No. 1499966
Each
PHP491.10(exc. VAT)
Temporarily out of stock
Schneider Electric, EasyPact Circuit breaker 4P 630A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 124-548
  • Mfr. Part No. EZC630N4500N
Each
PHP132,246.51(exc. VAT)
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 1A, 125V ac/dc
  • RS Stock No. 764-9510
Each (In a Pack of 10)
PHP41.675(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 55 kA
  • RS Stock No. 209-6757
  • Mfr. Part No. 3VA1112-5EE36-0AA0
Each
PHP49,652.58(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 34 kA, Fixed Mount
  • RS Stock No. 127-169
  • Mfr. Part No. 179328 N4-4-800-S15-PV-NA
Each
PHP472,217.91(exc. VAT)
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0840
  • Mfr. Part No. 3WA9111-0AX21
Each
PHP3,443.62(exc. VAT)
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