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

228 of 999+
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-306
  • Mfr. Part No. 8GK6724-4KK33
Each
$511.43(exc. GST)
PTC Resettable Fuse 33V 750mA 1812
  • RS Stock No. 560-348
  • Mfr. Part No. 0ZCG0075BF2B
Each
$0.36(exc. GST)
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9821
  • Mfr. Part No. 3VA1120-4ED46-0AA0
Each
$1,152.51(exc. GST)
Better World
Siemens SENTRON Terminal for use with 3VA4/5 125
  • RS Stock No. 269-7095
  • Mfr. Part No. 3VA9134-0JA11
Each (In a Pack of 4)
$27.46(exc. GST)
Schneider Electric Flexible Elbow Busbar Trunking, 1.2m, 630A, Canalis Series
  • RS Stock No. 354-306
  • Mfr. Part No. KSA630DLF42F
Each
$5,187.19(exc. GST)
ABB 50A Tag Fuse, 150 x 40 x 72mm, 500V
  • RS Stock No. 250-4435
  • Mfr. Part No. 1SCA022697R8380
1 Box of 3
$188.34(exc. GST)
Mersen 670A Bolted Tag Fuse, C3, 240 V dc, 415V ac, 133mm
  • RS Stock No. 178-1083
  • Mfr. Part No. N226332 / BTLM42V670
Each
$576.09(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 80A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 269-588
  • Mfr. Part No. 3VA5280-5ED41-2AA0
Each
$2,758.22(exc. GST)
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 3A 24V CB, 1 channels
  • RS Stock No. 212-8801
  • Mfr. Part No. 2800910
Each
$108.53(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-723
  • Mfr. Part No. 3VA6440-6KP31-2AA0
Each
$17,991.59(exc. GST)
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 3A 24V CB, 1 channels
  • RS Stock No. 212-8808
  • Mfr. Part No. 2800924
Each
$99.15(exc. GST)
ABB 630A Tag Fuse, 150 x 70 x 86mm, 500V
  • RS Stock No. 250-4458
  • Mfr. Part No. 1SCA022698R0520
Each
$142.66(exc. GST)
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 1A 24V CB, 1 channels
  • RS Stock No. 212-8804
  • Mfr. Part No. 2800915
Each
$99.81(exc. GST)
Siemens 80A Tag Fuse, 102.5mm, 690V, 75.4mm
  • RS Stock No. 608-811
  • Mfr. Part No. 3NE8020-3MK
1 Pack of 3
$363.39(exc. GST)
ABB Cable Connection Kit for use with MCCB
  • RS Stock No. 539-1682
  • Mfr. Part No. 1SKA143000C3001 EPB KIT 3C1
Each
$140.64(exc. GST)
Hager Hager MMN Circuit Breaker, 4P, 12A, Type AC, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-891
  • Mfr. Part No. MMN413
Each
$1,033.79(exc. GST)
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-378
  • Mfr. Part No. KV 8448
Each
$551.36(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA2, 3 channels
  • RS Stock No. 160-189
  • Mfr. Part No. 3VA2450-5KQ32-0AA0
Each
$9,270.21(exc. GST)
Siemens SENTRON Trip Alarm Switch
  • RS Stock No. 277-0952
  • Mfr. Part No. 3WA9111-0EM45
1 Set
$1,254.68(exc. GST)
Siemens 2A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-676
  • Mfr. Part No. 3NA6802
Each (In a Pack of 3)
$24.46(exc. GST)
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