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

1736 of 999+
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4757
  • Mfr. Part No. 3VA2163-7KP36-0AA0
Each
$4,032.36(exc. GST)
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 4 channels
  • RS Stock No. 259-3793
  • Mfr. Part No. 1SDA071798R1
Each
$47,019.75(exc. GST)
Schurter SMD Non Resettable Fuse 750mA, 125V ac/dc
  • RS Stock No. 733-4868P
  • Mfr. Part No. 3404.0113.22
Each (Supplied on a Reel)
$1.188(exc. GST)
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4102
  • Mfr. Part No. 1SDA072199R1
Each
$19,820.24(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4009
  • Mfr. Part No. 3VA2110-7MP36-0AA0
Each
$2,724.47(exc. GST)
Schurter SMD Non Resettable Fuse 315mA, 277 V ac, 250V dc
  • RS Stock No. 830-4167P
  • Mfr. Part No. 3403.0269.23
Each (Supplied on a Reel)
$2.726(exc. GST)
Mersen 25A NH Fuse, NH000, 500V ac
  • RS Stock No. 136-0558
  • Mfr. Part No. E201185C / NH000GG50V25/3
Each (In a Box of 3)
$13.43(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-366
  • Mfr. Part No. 3VA6440-8JQ31-2AA0
Each
$14,015.34(exc. GST)
Siemens ALPHA Adapter Kit for use with ALPHA 1600 DIN
  • RS Stock No. 629-144
  • Mfr. Part No. 8GK9400-0KK45
1 Set
$590.66(exc. GST)
Weidmüller Surge Arrester, 15kA, 1500V dc, Screw Mount Mount
  • RS Stock No. 285-5292
  • Mfr. Part No. 2756000000
Each
$1,137.49(exc. GST)
Schurter SMD Non Resettable Fuse 8A, 32 V ac, 63V dc
  • RS Stock No. 703-2776P
  • Mfr. Part No. 3413.0327.22
Each (Supplied on a Reel)
$0.965(exc. GST)
Schurter SMD Non Resettable Fuse 1.5A, 125V ac/dc
  • RS Stock No. 733-4870P
  • Mfr. Part No. 3404.0115.22
Each (Supplied on a Reel)
$1.188(exc. GST)
SIBA SMD Non Resettable Fuse 250mA, 250V
  • RS Stock No. 736-2617P
  • Mfr. Part No. 160000.0,25
Each (Supplied on a Reel)
$3.262(exc. GST)
2-pole switch, 1-pole protected
  • RS Stock No. 577-479
  • Mfr. Part No. 3120-N551-P7T1-W15DY4-1A
Each
$48.13(exc. GST)
Siemens ALPHA Assembly Kit for use with ALPHA DIN
  • RS Stock No. 629-096
  • Mfr. Part No. 8GK9910-0KK41
1 Set
$103.75(exc. GST)
Schneider Electric EasyPact Electronic Circuit Breaker 50A, Fixed
  • RS Stock No. 122-366
  • Mfr. Part No. LV510504
Each
$288.94(exc. GST)
Lovato 32A Rail Mount Fuse Holder, 1P+N, 690V ac
  • RS Stock No. 216-8280
  • Mfr. Part No. FB01F1M
Each
$25.76(exc. GST)
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2349
  • Mfr. Part No. 2CCF800260R0001
Each
$48.87(exc. GST)
Littelfuse 0.55A Resettable Fuse, 6V dc
  • RS Stock No. 867-5328P
  • Mfr. Part No. PICOSMDC050S-2
Each (Supplied on a Reel)
$0.657(exc. GST)
Bourns 80A Tag Fuse, 38mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4235
  • Mfr. Part No. PF-NT5-80
Each
$56.00(exc. GST)
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