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

34963 Products showing for Fuses & Circuit Breakers

141 of 999+
UMT-H FUSE 30A T
  • RS Stock No. 577-316
  • Mfr. Part No. 3403.0289.11
Each
$2.79(exc. GST)
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 231-474
  • Mfr. Part No. 109682 NZMN3-S400
Each
$4,565.53(exc. GST)
RS PRO Earthing Strap Copper 150 x 13mm Diameter
  • RS Stock No. 264-9225
Each (In a Pack of 5)
$18.592(exc. GST)
Schurter 3.15A Slow-Blow Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-8004
  • Mfr. Part No. 0034.5048
Each (In a Pack of 10)
$3.123(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 45A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-631
  • Mfr. Part No. 3VA5145-4ED41-0AA0
Each
$1,396.88(exc. GST)
Legrand 96 Way Split Load Metal Consumer Unit, 160A, IP30 XL160
  • RS Stock No. 705-5583
  • Mfr. Part No. 0 200 04
Each
$2,096.28(exc. GST)
Siemens 100A Tag Fuse, 102.5mm, 690V, 75mm
  • RS Stock No. 608-836
  • Mfr. Part No. 3NE8021-3MK
1 Pack of 3
$372.38(exc. GST)
Littelfuse 500A Inline Fuse Holder for BF2 Fuse, 1P, 32V dc
  • RS Stock No. 548-9199
  • Mfr. Part No. 02980900TXN
Each
$34.93(exc. GST)
Littelfuse 15A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8054
  • Mfr. Part No. 0217015.MXP
Each (In a Bag of 10)
$0.70(exc. GST)
Mersen 125A Rail Mount Fuse Holder for 22 x 58mm Fuse, N, 690V ac
  • RS Stock No. 768-3766
  • Mfr. Part No. K331094
Each
$66.03(exc. GST)
Siemens 250A NH Fuse, NH1, 500V ac
  • RS Stock No. 397-565
  • Mfr. Part No. 3NA3144
Each (In a Pack of 3)
$44.867(exc. GST)
Siemens SENTRON Arc Chute
  • RS Stock No. 277-0806
  • Mfr. Part No. 3WA9111-0AS12
Each
$669.25(exc. GST)
Schneider Electric Acti 9 iC60N MCB, 3P, 40A Curve C
  • RS Stock No. 230-6670
  • Mfr. Part No. A9F44340
Each
$101.97(exc. GST)
Mersen 1.6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 136-0567
  • Mfr. Part No. N090517 / MI5SF25V1,6
Each (In a Pack of 10)
$1.304(exc. GST)
Mersen 160A NH Fuse, NH00, 690V ac
  • RS Stock No. 377-0178
  • Mfr. Part No. J322169
Each
$118.06(exc. GST)
Eaton 10A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7036
  • Mfr. Part No. MDA-10-R
Each
$14.99(exc. GST)
Wickmann PC Board Non Resettable Fuse, Radial 250mA, 250V ac
  • RS Stock No. 226-0529P
  • Mfr. Part No. 3700250000
Each (Supplied as a Tape)
$2.06(exc. GST)
Littelfuse 3A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0102
  • Mfr. Part No. 0312003.HXP
Each (In a Pack of 10)
$1.96(exc. GST)
Schneider Electric Acti9 Acti9 iC60 MCB, 4P, 63A, Type A, 500V AC, 30 mA Breaking Capacity
  • RS Stock No. 429-220
  • Mfr. Part No. A9V71463
Each
$3,455.43(exc. GST)
Wurth Elektronik Earthing Strap
  • RS Stock No. 756-8689
  • Mfr. Part No. 74273703
Each
$7.50(exc. GST)
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