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

256 of 999+
Temporarily out of stock
Siemens 5SM28 RCCB, 40A, 2 Pole, Type A, 230V
  • RS Stock No. 328-318
  • Mfr. Part No. 5SM2822-8
Each
$470.21(exc. GST)
New product - Preorder today
FUSE 125V PICO II FA RoHS .062A
  • RS Stock No. 552-973
  • Mfr. Part No. 0251.062MAT1L
1 Bag of 25
$153.29(exc. GST)
Temporarily out of stock
ABB AC Switch Disconnectors Accessories Phase Barrier for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9697
  • Mfr. Part No. 1SCA100768R1001
Each
$202.74(exc. GST)
In Stock
RS PRO 5A Resettable Fuse, 30V dc
  • RS Stock No. 279-6756
Each (In a Pack of 10)
$1.497(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-4685
  • Mfr. Part No. 1SDA072962R1
Each
$17,060.97(exc. GST)
Currently unavailable
ABB Plastic Consumer Unit, IP65 1SLM006500A
  • RS Stock No. 286-4988
  • Mfr. Part No. 1SLM006500A3116
Each
$321.73(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-623
  • Mfr. Part No. 3VA6560-7JT42-0AA0
Each
$17,132.32(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4738
  • Mfr. Part No. 1SDA073018R1
Each
$29,066.75(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller Series NZM Adapter for use with N(S)3, NZM3, PN3
  • RS Stock No. 240-645
  • Mfr. Part No. 104556 NZM3-XAD550
Each
$463.11(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 4 channels
  • RS Stock No. 155-786
  • Mfr. Part No. 3VA2325-7JQ42-0AA0
Each
$9,455.16(exc. GST)
Unavailable
Schneider Electric ComPact Mounting Frame for use with NS630b...1600
  • RS Stock No. 275-6655
  • Mfr. Part No. 33231
Each
$9,471.11(exc. GST)
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 1.6kA, Fixed Mount
  • RS Stock No. 247-1774
  • Mfr. Part No. 33314
Each
$15,761.38(exc. GST)
In Stock
Schneider Electric Thermal Circuit Breaker - GB2 Single Pole 277V ac Voltage Rating DIN Rail Mount, 4A Current Rating
  • RS Stock No. 312-3667
  • Mfr. Part No. GB2CB09
Each
$125.17(exc. GST)
Temporarily out of stock
Schneider Electric Vigilohm Mounting Base for use with Circuit Breaker
  • RS Stock No. 276-1523
  • Mfr. Part No. 50169
Each
$253.91(exc. GST)
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 160mA, 250V ac
  • RS Stock No. 769-3195
  • Mfr. Part No. SR-5-160MA-BK
Each (In a Pack of 10)
$3.156(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7777
  • Mfr. Part No. C16H34V160
Each
$6,815.39(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 260-267
  • Mfr. Part No. 3VA6325-8KP41-0AA0
Each
$12,176.51(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-181
  • Mfr. Part No. 3VA6580-7KQ42-2AA0
Each
$22,424.49(exc. GST)
In Stock
Eaton 300A British Standard Fuse, 660V, 81.7mm
  • RS Stock No. 414-982
  • Mfr. Part No. GSGB300
Each
$502.33(exc. GST)
Temporarily out of stock
Siemens 250A Tag Fuse, NH1Lmm, 1.25kV
  • RS Stock No. 627-113
  • Mfr. Part No. 3NB1128-4KK11
1 Pack of 2
$2,321.08(exc. GST)
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