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

35151 Products showing for Fuses & Circuit Breakers

225 of 999+
Schurter SMD Non Resettable Fuse 10A, 125V ac/dc
  • RS Stock No. 209-9405
  • Mfr. Part No. 3-122-716
Each (In a Pack of 100)
$7.242(exc. GST)
Eaton 3 Phase Busbar, 690V ac, 45mm Pitch
  • RS Stock No. 178-8003
  • Mfr. Part No. 232290 B3.0/5-PKZ0
Each
$55.84(exc. GST)
Siemens SENTRON Busbar Adapter, 60mm Pitch
  • RS Stock No. 211-3844
  • Mfr. Part No. 8US1211-4TR00
Each
$290.06(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-216
  • Mfr. Part No. 3VA6340-7KP31-0AA0
Each
$8,969.80(exc. GST)
Eaton PDIM RCCB, 40A, 4 Pole, 30 → 1000mA, Type A, 230/400V ac
  • RS Stock No. 230-690
  • Mfr. Part No. 111760 PDIM-40/4
Each
$981.85(exc. GST)
Siemens 1.25kA Tag Fuse, NH3, 690V
  • RS Stock No. 608-707
  • Mfr. Part No. 3NC3243-6U
1 Pack of 3
$1,536.61(exc. GST)
Schneider Electric, ComPacT New generation MCCB 4P 25A, Breaking Capacity 440 V, Fixed Mount
  • RS Stock No. 205-307
  • Mfr. Part No. C11N44V025B
Each
$6,555.64(exc. GST)
Siemens SENTRON Connection Unit
  • RS Stock No. 277-0817
  • Mfr. Part No. 3WA9111-0AV11
Each
$79.63(exc. GST)
Siemens, SENTRON MCCB 2P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-229
  • Mfr. Part No. 3VA5340-5EC61-0AA0
Each
$5,298.39(exc. GST)
Sensata Airpax Airpax Thermal Circuit Breaker - 209 3 Pole 240V ac Voltage Rating Panel Mount, 30A Current Rating
  • RS Stock No. 275-0059
  • Mfr. Part No. 209-3-1-61-4-9-30-V
Each
$565.24(exc. GST)
Phoenix Contact Electronic Circuit Breaker 6A 24V PTCB, DIN Rail Mount
  • RS Stock No. 201-6203
  • Mfr. Part No. 2909908
Each
$68.81(exc. GST)
Siemens 25A NH Fuse, NH1, 440 - 500V ac/dc
  • RS Stock No. 269-8314
  • Mfr. Part No. 3NA7110
Each (In a Pack of 3)
$33.913(exc. GST)
Bourns Thermal Fuse +82°C 50 A, 28V
  • RS Stock No. 258-6412
  • Mfr. Part No. SC82AAB
Each (In a Pack of 10)
$1.39(exc. GST)
Eaton 30A Base Mount Fuse Holder, 600V
  • RS Stock No. 261-442
  • Mfr. Part No. BK/HEB-AA
1 Pack of 20
$1,816.39(exc. GST)
Siemens SENTRON 4 Phase Busbar
  • RS Stock No. 187-5209
  • Mfr. Part No. 5ST3746-2
Each
$314.71(exc. GST)
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-232
  • Mfr. Part No. 3VA6610-6HL42-0AA0
Each
$20,652.95(exc. GST)
Mersen 10A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6805
  • Mfr. Part No. W084314
Each (In a Pack of 10)
$9.992(exc. GST)
Schneider Electric Acti9 3 Phase Distribution Board, 12 Way, 250 A
  • RS Stock No. 339-823
  • Mfr. Part No. SEA9BPN12
Each
$1,291.76(exc. GST)
SIBA 10A M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3470
  • Mfr. Part No. 70-010-05/10A
Each (In a Pack of 5)
$9.234(exc. GST)
Eaton 6A NH Fuse, 51 x 21 x 79mm, 400V ac
  • RS Stock No. 261-736
  • Mfr. Part No. 6NHG000B-400
1 Pack of 3
$29.03(exc. GST)
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