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

34912 Products showing for Fuses & Circuit Breakers

93 of 999+
Temporarily out of stock
Eaton IZMX16 Electronic Circuit Breaker 800A , Fixed
  • RS Stock No. 127-705
  • Mfr. Part No. 183337 IZMX16H3-V08F-1
Each
$11,377.89(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 3P, 32A Curve D, 440V AC, 60V DC, 30 kA Breaking Capacity
  • RS Stock No. 664-316
  • Mfr. Part No. 5SY8332-8
Each
$627.38(exc. GST)
In Stock
Bourns 400A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4154
  • Mfr. Part No. PF-FB2-400
Each (In a Box of 10)
$259.536(exc. GST)
Temporarily out of stock
Hager Hager NFN Circuit Breaker, 1P, 4A Curve C, 230 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 599-907
  • Mfr. Part No. NFN104
Each
$107.69(exc. GST)
In Stock
Schurter 16A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-6169
  • Mfr. Part No. 0034.3129
Each (In a Pack of 10)
$1.62(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 45A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 346-792
  • Mfr. Part No. BDF36045
Each
$1,515.78(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 260-8125
  • Mfr. Part No. C40N32D400
Each
$8,324.13(exc. GST)
Temporarily out of stock
Schneider Electric Resi9 Electronic Circuit Breaker 10A Resi9, Clip-On Type C
  • RS Stock No. 345-165
  • Mfr. Part No. R9PDCS10
Each
$1,243.01(exc. GST)
Temporarily out of stock
Hager NQN MCB, 4P, 50A Curve B, 415V AC, 15 kA Breaking Capacity
  • RS Stock No. 597-940
  • Mfr. Part No. NQN450
Each
$1,056.80(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 4P, 10A Curve B, 440V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 664-348
  • Mfr. Part No. 5SY6410-6
Each
$278.58(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 207-178
  • Mfr. Part No. A9XAH657
Each
$204.28(exc. GST)
In Stock
Schurter 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 712-4793P
  • Mfr. Part No. 0091.0001
Each (Supplied in a Box)
$26.12(exc. GST)
In Stock
Hager BF RCCB, 63A, 3P Pole, 300mA, Type AC
  • RS Stock No. 602-190
  • Mfr. Part No. BF364
Each
$736.11(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 432-857
  • Mfr. Part No. C080N35EFM
Each
$20,922.54(exc. GST)
In Stock
WAGO Electronic Circuit Breaker 10A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 303-284
  • Mfr. Part No. 787-3861/100-000
Each
$83.08(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 3P, 63A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4352
  • Mfr. Part No. 2CDS273001R0634 S203M-C63
Each
$245.59(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 1P 63A, Breaking Capacity 18 kA, Fixed Mount
  • RS Stock No. 346-751
  • Mfr. Part No. C10F1TM063
Each
$1,011.45(exc. GST)
Temporarily out of stock
35A NH Fuse, 51 x 21 x 79mm, 400V ac
  • RS Stock No. 262-226
  • Mfr. Part No. 35NHG000BI-400
1 Pack of 3
$34.67(exc. GST)
Temporarily out of stock
Eaton NZM Jumper Link for use with N2-4-…-S1(-S15)-DC
  • RS Stock No. 121-180
  • Mfr. Part No. 170118 NZM2-4-XKVI2POU
Each
$333.87(exc. GST)
In Stock
Eaton 16A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8399
  • Mfr. Part No. C10G16
Each (In a Pack of 10)
$2.802(exc. GST)
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