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

72 of 999+
Schneider Electric SWBD 3 Phase Distribution Board, 24 Way, 160 A
  • RS Stock No. 230-6810
  • Mfr. Part No. MD224C31
Each
$2,504.94(exc. GST)
ABB PBSC 3, 3+N Phase Busbar
  • RS Stock No. 203-395
  • Mfr. Part No. 1STQ007424A0000
Each
$5,002.32(exc. GST)
Eaton 20A Cartridge Fuse, 23 x 57mm
  • RS Stock No. 228-988
  • Mfr. Part No. 20KR85
1 Pack of 20
$448.05(exc. GST)
Schneider Electric MasterPact Connection Unit for use with MTZ1 06-16
  • RS Stock No. 212-002
  • Mfr. Part No. LV833736
Each
$915.41(exc. GST)
Siemens Base Mount Fuse Holder for 00-4 Fuse, 690V ac
  • RS Stock No. 203-2169
  • Mfr. Part No. 3NX1021
Each
$181.67(exc. GST)
Hager NQN MCB, 3P, 63A Curve B, 415V AC, 15 kA Breaking Capacity
  • RS Stock No. 597-868
  • Mfr. Part No. NQN363
Each
$838.44(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA2, 4 channels
  • RS Stock No. 156-801
  • Mfr. Part No. 3VA2463-8KQ42-0AA0
Each
$14,745.54(exc. GST)
Mersen 15A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4418
  • Mfr. Part No. ATMR15
Each
$108.12(exc. GST)
Legrand 16A F Ceramic Cartridge Fuse, 10.3 x 31.5mm
  • RS Stock No. 293-8238
  • Mfr. Part No. 0 126 16
Each (In a Pack of 10)
$6.223(exc. GST)
Omron Busbar
  • RS Stock No. 111-3530
  • Mfr. Part No. PYDN-7.75-200Y
Each
$27.98(exc. GST)
Better World
Siemens SIRIUS Electronic Circuit Breaker 200mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-734
  • Mfr. Part No. 3RV2411-0BA20
Each
$437.65(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 269-813
  • Mfr. Part No. 3VA6110-7KL31-2AA0
Each
$5,247.35(exc. GST)
RS PRO 5A FF Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 420-117
Each (In a Pack of 10)
$3.308(exc. GST)
ABB 72 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1919
  • Mfr. Part No. 1SL1209A00 65P18X42
Each
$184.11(exc. GST)
Siemens 1 Phase Surge Protector, 25kA, DIN Rail Mount
  • RS Stock No. 211-0191
  • Mfr. Part No. 5SD7463-0
Each
$610.43(exc. GST)
Schneider Electric, ComPacT New Generation MCCB 3P 90A, Breaking Capacity 100 kA, Screw Mount
  • RS Stock No. 207-255
  • Mfr. Part No. BJL36090LU
Each
$4,974.71(exc. GST)
Siemens SENTRON 5SY5 MCB, 4P, 20A Curve B, 400V AC, 880V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-374
  • Mfr. Part No. 5SY5420-6
Each
$620.64(exc. GST)
TE Connectivity Thermal Circuit Breaker - W51 Single Pole 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 782-8044
  • Mfr. Part No. W51-A122B1-10
Each
$15.96(exc. GST)
Eaton 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 852-6945
  • Mfr. Part No. HTB-44M-R
Each
$26.07(exc. GST)
Hager Hager NKN Circuit Breaker, 2P, 50A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-912
  • Mfr. Part No. NKN250
Each
$420.02(exc. GST)
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