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

145 of 999+
Wurth Elektronik Earthing Strap
  • RS Stock No. 756-8689
  • Mfr. Part No. 74273703
Each
$7.50(exc. GST)
Siemens SENTRON 5SY Circuit Breaker, 3P, 16A Curve D, 440V AC, 72V DC, 30 kA Breaking Capacity
  • RS Stock No. 664-315
  • Mfr. Part No. 5SY8316-8BB08
Each
$303.50(exc. GST)
SIBA 160A NH Fuse, NH00, 500V ac
  • RS Stock No. 421-744
  • Mfr. Part No. 20-001-13/160E1
Each (In a Pack of 3)
$24.493(exc. GST)
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0922
  • Mfr. Part No. 3WA9111-0EK13
1 Set
$452.39(exc. GST)
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0823
  • Mfr. Part No. 3WA9111-0AV24
Each
$225.35(exc. GST)
Mersen 2A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2696
  • Mfr. Part No. B216661
1 Box of 10
$169.72(exc. GST)
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS Stock No. 246-5162
  • Mfr. Part No. 3RV1915-1DB
Each
$116.28(exc. GST)
Mersen 40A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0603
  • Mfr. Part No. J1017206 / FR14GR69V40
Each
$40.78(exc. GST)
Eaton 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 169-9382
  • Mfr. Part No. HTC-30M
1 Bag of 1000
$4,754.75(exc. GST)
Mersen 50A NH Fuse, NH00, 690V ac
  • RS Stock No. 270-3144
  • Mfr. Part No. Y228457
Each
$40.36(exc. GST)
Mersen 40A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0635
  • Mfr. Part No. S1017191 / FR14GR69V40T
Each
$61.22(exc. GST)
Littelfuse 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 738-2829P
  • Mfr. Part No. 0326015.MXP
Each (Supplied on a Reel)
$2.717(exc. GST)
Siemens SENTRON Operations Counter
  • RS Stock No. 277-0755
  • Mfr. Part No. 3WA9111-0AH05
Each
$994.11(exc. GST)
Mersen 15A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0524
  • Mfr. Part No. HP10M15
Each (In a Box of 10)
$40.129(exc. GST)
Siemens SENTRON 5SV60 MCB, 1P + N, 25A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 328-477
  • Mfr. Part No. 5SV6016-6KP25
Each
$520.89(exc. GST)
Phoenix Contact Surge Protector, 6kA, 264V ac, Base Mounting Mount
  • RS Stock No. 496-914
  • Mfr. Part No. 1634908
Each (In a Pack of 50)
$291.943(exc. GST)
Schneider Electric, ComPacT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 260-9481
  • Mfr. Part No. C10H4TM063
Each
$2,240.35(exc. GST)
Schurter UHB Series Thermoplastic Base Mount Fuse Holder Cover for 5 x 20mm Fuse
  • RS Stock No. 337-1327
Each (In a Pack of 10)
$2.186(exc. GST)
Siemens SENTRON Busbar Connector, 450V
  • RS Stock No. 211-3831
  • Mfr. Part No. 5ST3781-2
Each (In a Pack of 10)
$26.089(exc. GST)
Schneider Electric Acti9 3 Phase Distribution Board, 16 Way, 250 A
  • RS Stock No. 244-940
  • Mfr. Part No. SE48B250
Each
$1,632.61(exc. GST)
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