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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

45 / 999+
Better World
Schneider Electric Surge Protector, 200A, <3.9kV, DIN Rail Mount
  • RS Stock No. 219-8276
  • Mfr. Part No. A9L40281
Each
MYR667.70
Mersen Surge Protector
  • RS Stock No. 251-3638
  • Mfr. Part No. 83020184 / STPT2-40K275V-2P-TE-M GROUND MONITORING
Each
MYR771.42
Littelfuse 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2788
  • Mfr. Part No. 0218001.MXP
Each (In a Pack of 10)
MYR3.079
Schneider Electric, ComPacT MCCB 3P 500A, Fixed Mount
  • RS Stock No. 260-8247
  • Mfr. Part No. C63V31M500
Each
MYR24,105.55
Eaton 32A Rail Mount Fuse Holder for A2 Fuse, 1P, 690V ac
  • RS Stock No. 413-917
  • Mfr. Part No. RS32H
Each
MYR188.38
Eaton RCCB, 25A, 1+N Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 667-0605
  • Mfr. Part No. 235390 PFIM-25/2/003-MW
Each
MYR491.18
Hinode Electric Co Ltd 80A Bolted Tag Fuse, 61mm
  • RS Stock No. 103-4249
  • Mfr. Part No. 660GH-080
Each (In a Pack of 5)
MYR100.178
Better World
ABB System Pro M Compact S200 MCB, 2P, 3A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7841
  • Mfr. Part No. 2CDS252001R0031 S202-D3
Each
MYR353.93
Phoenix Contact Mounting Base for use with CB Series
  • RS Stock No. 768-1139
  • Mfr. Part No. 2800929
Each
MYR78.62
Eaton 125A NH Fuse, NH00, 690V ac
  • RS Stock No. 181-8733
  • Mfr. Part No. 125NHG00B-690
Each
MYR41.59
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 20A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2447
  • Mfr. Part No. M9F43220
Each
MYR929.39
Schurter 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 173-8057
  • Mfr. Part No. 8020.5017.G
1 Box of 1000
MYR2,859.50
Eaton 300A T Cartridge Fuse, 51 x 182mm
  • RS Stock No. 182-1353
  • Mfr. Part No. LPJ-300SP
Each
MYR3,418.67
Phoenix Contact 1 Phase Surge Protector, 2kV, DIN Rail Mount
  • RS Stock No. 890-3702
  • Mfr. Part No. 2905415
Each
MYR2,722.77
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 400A, Fixed Mount
  • RS Stock No. 232-0099
  • Mfr. Part No. 1SDA054478R1 T5N400 FF TMA 400A
Each
MYR9,574.52
RS PRO 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-413
Each (In a Pack of 10)
MYR1.479
Omron Busbar
  • RS Stock No. 329-7320
  • Mfr. Part No. G78-16-P2RF-E
Each
MYR52.41
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 800A, Fixed Mount
  • RS Stock No. 231-9348
  • Mfr. Part No. 1SDA100718R1 XT6N 800 TMA 800-8000 3pFF
Each
MYR11,422.63
Better World
Schneider Electric iID RCD, 40A, 100mA
  • RS Stock No. 776-3691
  • Mfr. Part No. A9R12240
Each
MYR252.49
Eaton 6A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 489-4629
  • Mfr. Part No. FWC-6A10F
Each
MYR34.91
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