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

49110 Products showing for Fuses & Circuit Breakers

2450 of 999+
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 63A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-6024
  • Mfr. Part No. 3VA1163-4EE42-0AA0
Each
SGD788.98(exc. GST)
Temporarily out of stock
Better World
Siemens, 3VA1 MCCB 4P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 210-3334
  • Mfr. Part No. 3VA1140-3EF42-0AA0
Each
SGD692.48(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-280
  • Mfr. Part No. 3VA2140-5HK32-0AA0
Each
SGD789.68(exc. GST)
Temporarily out of stock
Siemens SENTRON Communication Module for use with 3VA
  • RS Stock No. 210-9418
  • Mfr. Part No. 3VA9987-0TA10
Each
SGD2,358.86(exc. GST)
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - IULN11 2 Pole Panel Mount, 20A Current Rating
  • RS Stock No. 275-0314
  • Mfr. Part No. IULN11-1REC4-72-20.0-A
Each
SGD251.00(exc. GST)
Temporarily out of stock
Siemens SENTRON Connection Unit
  • RS Stock No. 277-0818
  • Mfr. Part No. 3WA9111-0AV12
Each
SGD56.03(exc. GST)
Temporarily out of stock
Siemens SENTRON Trip Alarm Switch
  • RS Stock No. 277-0753
  • Mfr. Part No. 3WA9111-0AH03
Each
SGD144.86(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-397
  • Mfr. Part No. 3VA5140-6EF31-0AA0
Each
SGD517.31(exc. GST)
In Stock
Bourns 0.05A Resettable Fuse, 220V
  • RS Stock No. 692-6771
  • Mfr. Part No. CMF-RL50A-0
Each (In a Pack of 5)
SGD0.924(exc. GST)
Temporarily out of stock
Mersen 450A German Standard Fuse, 31, 700V, 77mm
  • RS Stock No. 304-2322
  • Mfr. Part No. C300014
Each
SGD295.39(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3579
  • Mfr. Part No. 1SDA071557R1
Each
SGD15,833.63(exc. GST)
Temporarily out of stock
Better World
ABB, XT4L MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6737
  • Mfr. Part No. 1SDA068394R1 XT4L 160 TMA 160A FF
Each
SGD1,920.88(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4624
  • Mfr. Part No. 3VA2140-6HK42-0AA0
Each
SGD1,397.84(exc. GST)
Temporarily out of stock
Better World
ABB, XT4H MCCB 3P 160A, Fixed Mount
  • RS Stock No. 236-6786
  • Mfr. Part No. 1SDA068514R1 XT4H 160 Ekip LS/I 160A FF
Each
SGD1,455.09(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 4 channels
  • RS Stock No. 157-324
  • Mfr. Part No. 3VA2225-7JQ42-0AA0
Each
SGD3,943.55(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-539
  • Mfr. Part No. 3VA5112-4GC41-0AA0
Each
SGD1,459.59(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3795
  • Mfr. Part No. 3VA2216-5HL42-0AA0
Each
SGD2,051.31(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1+N, 32A, Type Z, 240V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 200-895
  • Mfr. Part No. 2CDS381103R0538
Each
SGD167.91(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 225A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-330
  • Mfr. Part No. 3VA5222-6GD41-2AA0
Each
SGD2,539.45(exc. GST)
Temporarily out of stock
ABB S804C MCB, 4P, 16A Curve K, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-494
  • Mfr. Part No. 2CCS884001R0467
Each
SGD455.89(exc. GST)
1
2450
2456
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