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

46578 Products showing for Fuses & Circuit Breakers

179 / 999+
Temporarily out of stock
Lovato 1 Phase Surge Protector, 15kA
  • RS Stock No. 216-8308
  • Mfr. Part No. SG2C1NA320
Each
MYR874.34
Temporarily out of stock
Lovato 32A Rail Mount Fuse Holder, 3P+N, 690V ac
  • RS Stock No. 216-8281
  • Mfr. Part No. FB01F3N
Each
MYR138.75
In Stock
HENSEL 1, 3 Phase Distribution Board, 9 Way, 63 A
  • RS Stock No. 183-2856
  • Mfr. Part No. KV7109
Each
MYR339.45
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit
  • RS Stock No. 219-8950
  • Mfr. Part No. KSB32CP
Each
MYR1,399.32
In Stock
Eaton RCBO, 16A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type A, Type C, FRBm6 Range
  • RS Stock No. 123-373
  • Mfr. Part No. 170957 FRBM6-C16/3N/03-A
Each
MYR1,178.52
Temporarily out of stock
Hager CDB RCCB, 63A, 3P+N Pole, 30mA, Type B, 230 → 400V ac
  • RS Stock No. 597-925
  • Mfr. Part No. CDB663F
Each
MYR7,636.67
In Stock
Mersen 800A size 33 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2215
  • Mfr. Part No. Z300080
Each
MYR1,368.11
In Stock
Bourns 0.75A Resettable Fuse, 60V
  • RS Stock No. 161-6925
  • Mfr. Part No. MF-SM075/60-2
Each (On a Reel of 2000)
MYR1.682
In Stock
Finder Busbar
  • RS Stock No. 386-4453
  • Mfr. Part No. 093.20
Each
MYR14.93
In Stock
Eaton xEffect MCB, 2P, 63A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3415
  • Mfr. Part No. 278766 FAZ-C63/2
Each
MYR458.52
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 630mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-667
  • Mfr. Part No. 3RV2811-0GD10
Each
MYR1,078.60
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 100A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-818
  • Mfr. Part No. IL1003P36
Each
MYR3,309.00
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 25A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1335
  • Mfr. Part No. 5SY4225-8
Each
MYR473.01
In Stock
ABB Tmax XT DIN Rail Plate for use with XT2
  • RS Stock No. 236-6872
  • Mfr. Part No. 1SDA080704R1 DIN50022 XT2 PLATE UL
Each
MYR134.38
In Stock
RS PRO 5A Fast Acting Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-085
1 Pack of 10
MYR1,571.96
In Stock
Eaton 50A Bolted Tag Fuse, 250 V dc, 500V ac, 111mm
  • RS Stock No. 181-8673
  • Mfr. Part No. BD50
Each
MYR75.76
In Stock
WAGO Electronic Circuit Breaker 8A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 279-4126
  • Mfr. Part No. 787-2861/108-020
Each
MYR436.01
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-559
  • Mfr. Part No. 3VA6580-6HN32-0AA0
Each
MYR28,082.41
In Stock
NEMIQ Earthing Strap Copper
  • RS Stock No. 283-7540
  • Mfr. Part No. JF 6-150 M6
Each
MYR21.00
Temporarily out of stock
Siemens SENTRON Nut Keeper Kit for use with 3VA1 250
  • RS Stock No. 210-9329
  • Mfr. Part No. 3VA9214-0QA00
Each
MYR225.64
1
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