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

251 of 999+
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 24 Way, 250 A
  • RS Stock No. 336-638
  • Mfr. Part No. SEA9BPN24
Each
$3,389.29(exc. GST)
Temporarily out of stock
Schneider Electric MasterPact Spare Parts for use with Masterpact MasterPact MTZ2
  • RS Stock No. 653-809
  • Mfr. Part No. LV848891SP
Each
$3,475.71(exc. GST)
In Stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)1(-4), NZM1(-4), PN1(-4)
  • RS Stock No. 257-822
  • Mfr. Part No. 279392 NZM1-XTVD-0
Each
$204.60(exc. GST)
Temporarily out of stock
SENTRON Shunt Trip Voltage Release for use with 3VA41, 3VA51-59, 3VA61-69 Series
  • RS Stock No. 263-698
  • Mfr. Part No. 3VA9978-0BA21
Each
$935.62(exc. GST)
Limited stock
ABB SN201 MCB, 1+N, 4A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 186-3468
  • Mfr. Part No. 2CSS245102R0044 SN201 L C4-L
Each
$35.54(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 25A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-700
  • Mfr. Part No. IL0253P36
Each
$1,250.32(exc. GST)
Last RS stock
Wickmann 4A Resettable Fuse, 16V dc
  • RS Stock No. 174-0847
  • Mfr. Part No. RF3203-000
Each (In a Pack of 20)
$1.077(exc. GST)
Temporarily out of stock
Eaton 25A NH Fuse, 51 x 21 x 79mm, 400V ac
  • RS Stock No. 254-934
  • Mfr. Part No. 25NHG000BI-400
1 Pack of 3
$32.37(exc. GST)
Temporarily out of stock
Schneider Electric, Compact MCCB 3P 800A, Breaking Capacity 75 kA
  • RS Stock No. 340-879
  • Mfr. Part No. C080B3WM
Each
$8,993.22(exc. GST)
In Stock
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 774-0112
Each
$5.73(exc. GST)
In Stock
Finder Surge Protector
  • RS Stock No. 257-7419
  • Mfr. Part No. 7P2010000020
Each
$93.43(exc. GST)
Temporarily out of stock
Phoenix Contact CB Electronic Circuit breaker 8A 24V CB E1, On Base Element
  • RS Stock No. 855-7403
  • Mfr. Part No. 2800927
Each
$108.53(exc. GST)
In Stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS Stock No. 255-622
  • Mfr. Part No. 266645 NZM2-XS-R
Each
$413.77(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)4, NZM4
  • RS Stock No. 248-657
  • Mfr. Part No. 100674 NZM4-XTVDVR-60-NA
Each
$771.10(exc. GST)
Temporarily out of stock
Eaton xComfort ECO Distribution Board Enclosure, 18 Way
  • RS Stock No. 257-992
  • Mfr. Part No. 280351 BC-O-3/54-ECO
Each
$494.44(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 60A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 269-797
  • Mfr. Part No. 3VA5260-5ED31-1AA0
Each
$1,834.32(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-426
  • Mfr. Part No. 3VA6140-5KM31-0AA0
Each
$5,023.07(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON Circuit breaker 4P 80A, DIN Rail Mount
  • RS Stock No. 224-7887
  • Mfr. Part No. 3VA1180-4GF42-0AA0
Each
$1,171.94(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-380
  • Mfr. Part No. 3VA6460-5HN31-0AA0
Each
$7,669.16(exc. GST)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 150A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 231-328
  • Mfr. Part No. 113006 NZMN2-4-AF150-BT-NA
Each
$4,224.11(exc. GST)
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