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

243 of 999+
Temporarily out of stock
1A 45 x 80 x 54mm Neozed Fuse, 400V ac
  • RS Stock No. 255-980
  • Mfr. Part No. 268983 Z-SLS/B-1A
Each
$138.49(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 4 channels
  • RS Stock No. 157-289
  • Mfr. Part No. 3VA2163-5JQ42-0AA0
Each
$4,577.02(exc. GST)
Temporarily out of stock
SENTRON Connection Unit for use with 3VA41 Two 1 Pole 3VA Breakers
  • RS Stock No. 263-827
  • Mfr. Part No. 3VA9032-0LB20
Each
$108.55(exc. GST)
In Stock
Mersen 4A Slow-Blow Ceramic Cartridge Fuse, 8.5 x 31.5mm
  • RS Stock No. 247-2945
  • Mfr. Part No. X222959
1 Box of 10
$46.06(exc. GST)
Temporarily out of stock
Siemens ALPHA Din Support
  • RS Stock No. 627-118
  • Mfr. Part No. 8GK4853-0KK30
1 Pack of 2
$99.75(exc. GST)
Temporarily out of stock
Siemens SENTRON 1 Phase Busbar, 10mm Pitch
  • RS Stock No. 231-3100
  • Mfr. Part No. 5ST3765
Each (In a Pack of 10)
$64.518(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-621
  • Mfr. Part No. 3VA6210-5JP31-0AA0
Each
$6,762.07(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-358
  • Mfr. Part No. 3VA6440-7KT31-2AA0
Each
$23,414.75(exc. GST)
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0837
  • Mfr. Part No. 3WA9111-0AW31
Each
$463.28(exc. GST)
Temporarily out of stock
Eaton IZMX16 Electronic Circuit Breaker 1.25kA , Fixed
  • RS Stock No. 127-771
  • Mfr. Part No. 183557 IZMX16H4-V12F-1
Each
$19,546.19(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-481
  • Mfr. Part No. 3VA5580-0BB32-0AA0
Each
$9,306.17(exc. GST)
Temporarily out of stock
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB 2 Pole 80V dc Voltage Rating, 3A
  • RS Stock No. 212-8798
  • Mfr. Part No. 2800893
Each
$192.27(exc. GST)
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-162
  • Mfr. Part No. KV 3654
Each
$506.72(exc. GST)
In Stock
Electro PJP AdaBV140 Adapter for use with Screw Terminal Block
  • RS Stock No. 275-3342
  • Mfr. Part No. AdaBV140-R
Each
$11.30(exc. GST)
Temporarily out of stock
Siemens SENTRON 1 Phase Busbar, 230V, 18mm Pitch
  • RS Stock No. 328-498
  • Mfr. Part No. 5ST3674-7
Each
$45.64(exc. GST)
Temporarily out of stock
Mersen 250A size 30 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2007
  • Mfr. Part No. Y300056
Each
$282.33(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 2P, 16A Curve D, 400V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 610-527
  • Mfr. Part No. 5SY7216-8
Each
$258.41(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 20A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9829
  • Mfr. Part No. 3VA1120-5ED46-0AA0
Each
$1,244.58(exc. GST)
Temporarily out of stock
Eaton Eaton Metering Board ZSD Mounting Kit for use with Metering Board ZSD
  • RS Stock No. 247-557
  • Mfr. Part No. 153602 ZSD-BPKT/T/31
Each
$251.52(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4224
  • Mfr. Part No. 1SDA072348R1
Each
$20,443.38(exc. GST)
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