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

148 of 999+
In Stock
Better World
Schneider Electric Easypact Cvs400...630, Nsx400...630 Dc, Powerpact Multistandard Front Plate for use with Compact Nsx
  • RS Stock No. 221-1256
  • Mfr. Part No. LV432558
Each
$111.40(exc. GST)
Temporarily out of stock
Siemens 6A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2026
  • Mfr. Part No. 3NW2060-0HG
Each (In a Pack of 10)
$56.802(exc. GST)
Temporarily out of stock
Siemens Sirius Innovation Wiring Kit for use with Actuating Voltage Contactor
  • RS Stock No. 875-1037
  • Mfr. Part No. 3RA2933-2BB1
Each
$242.80(exc. GST)
In Stock
Siemens 63A Bottle Fuse Holder, 1P, 400V ac
  • RS Stock No. 622-0711
  • Mfr. Part No. 5SG1701
Each
$37.73(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 273-0860
  • Mfr. Part No. 1658-G21-02-P10-10A
Each
$14.82(exc. GST)
In Stock
Schurter 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7538
  • Mfr. Part No. 0034.3126
Each (In a Pack of 100)
$0.812(exc. GST)
Currently unavailable
Legrand HX 2 Phase Busbar, 400V, 35.5mm Pitch
  • RS Stock No. 731-9437
  • Mfr. Part No. 4 049 38
Each
$59.03(exc. GST)
Temporarily out of stock
Eaton Eaton xEnergy Basic Flange Plate for use with Service Distribution Board IVS, Wall Mounting Distribution System
  • RS Stock No. 256-658
  • Mfr. Part No. 292430 BP-FLP-600-2K-W
Each
$47.31(exc. GST)
Temporarily out of stock
100A Fuse Holder for 1.5 x 2.1 x 2.91in Fuse, 600V
  • RS Stock No. 261-990
  • Mfr. Part No. TCFH100N
1 Pack of 6
$561.84(exc. GST)
In Stock
MECATRACTION Brass Earth Clamp Max. Conductor Size 2 x 120mm 43mm
  • RS Stock No. 299-101
  • Mfr. Part No. SE2-120
Each (In a Box of 10)
$40.687(exc. GST)
Limited stock
ETA Thermal Circuit Breaker - 8340 Single Pole 80V dc Voltage Rating Flange Mount, 20A Current Rating
  • RS Stock No. 407-0766
  • Mfr. Part No. 8340-F410-P1M1-A3H0-20A
Each
$132.86(exc. GST)
In Stock
Mersen 4A Bolted Tag Fuse, A2, 460 V dc, 690V ac, 73mm
  • RS Stock No. 178-1088
  • Mfr. Part No. H1019252 / BTIA69V4
Each (In a Pack of 10)
$25.573(exc. GST)
In Stock
Mersen 3.15A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6940
  • Mfr. Part No. W084360
Each (In a Pack of 10)
$9.98(exc. GST)
Temporarily out of stock
Hager HMX MCB, 4P, 10A, 400V AC, 50 Breaking Capacity
  • RS Stock No. 602-238
  • Mfr. Part No. HMX410
Each
$1,472.21(exc. GST)
In Stock
Schurter SMD Non Resettable Fuse 1.25A, 125 V dc, 250V ac
  • RS Stock No. 736-0744
  • Mfr. Part No. 3403.0167.24
Each (In a Pack of 10)
$2.495(exc. GST)
In Stock
Europa Blanking Plate
  • RS Stock No. 201-7936
  • Mfr. Part No. ECUBP
1 Pair
$7.91(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4726
  • Mfr. Part No. 3VA2163-6JQ42-0AA0
Each
$4,170.43(exc. GST)
In Stock
Siemens SIRIUS Connection Adapter for use with 3RF34
  • RS Stock No. 160-185
  • Mfr. Part No. 3RF3900-0QA88
Each
$16.07(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 2A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7649
  • Mfr. Part No. 2CDS251001R0024 S201-C2
Each
$45.51(exc. GST)
Temporarily out of stock
SENTRON Busbar Connector for use with 3VA55, 3VA65 Series
  • RS Stock No. 263-789
  • Mfr. Part No. 3VA9673-0QB00
1 Kit
$1,077.04(exc. GST)
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