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

302 / 999+
In Stock
Eaton 200A Bolted Tag Fuse, LMT, 150 V dc, 240V ac, 59mm
  • RS Stock No. 182-1429
  • Mfr. Part No. 200LMT
Each
MYR185.68
In Stock
Bourns SMD Non Resettable Fuse 500mA, 50V dc
  • RS Stock No. 897-8989P
  • Mfr. Part No. SF-0603S050-2
Each (Supplied on a Reel)
MYR2.505
Temporarily out of stock
Eaton RCBO, 25A Current Rating, 2P Poles, 10mA Trip Sensitivity, Type A, Type C, FRBdM Range
  • RS Stock No. 121-253
  • Mfr. Part No. 168257 FRBDM-C25/1N/001-G/A
Each
MYR1,062.30
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2305
  • Mfr. Part No. 2CCF800219R0001
Each
MYR16.45
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 3+N, 40A Curve C, 400V AC, 72V DC
  • RS Stock No. 212-8948
  • Mfr. Part No. 5SL6640-7
Each
MYR936.90
Temporarily out of stock
Better World
Schneider Electric Linergy Side Cover For Busbar, 690V
  • RS Stock No. 211-2324
  • Mfr. Part No. LA9ZX01573
Each (In a Pack of 10)
MYR73.654
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 40A Curve B, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2346
  • Mfr. Part No. M9F21340
Each
MYR289.12
Temporarily out of stock
Schneider Electric, PowerPact MCCB 4P 20A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 428-854
  • Mfr. Part No. BJF46020
Each
MYR8,520.48
In Stock
Allen Bradley MCB, 4A Curve C, 230V AC, 48V DC
  • RS Stock No. 264-9403
  • Mfr. Part No. 1489-M1C040
Each
MYR296.68
Temporarily out of stock
ABB S800U MCB, 1P, 30A Curve K, 240V AC, 30 kA Breaking Capacity
  • RS Stock No. 140-446
  • Mfr. Part No. 2CCS881017R0527
Each
MYR583.31
Unavailable
Schneider Electric ComPact Trip Unit for use with Compact NSX 160/250 circuit breakers
  • RS Stock No. 221-1067
  • Mfr. Part No. LV433881
Each
MYR16,314.29
In Stock
SIBA 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 314-4800
  • Mfr. Part No. 50-179-06/10A
Each (In a Pack of 5)
MYR49.708
Temporarily out of stock
Phoenix Contact Surge Protector, 800V (Volts), DIN Rail Mount
  • RS Stock No. 207-2775
  • Mfr. Part No. 2907865
Each
MYR1,190.93
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 160A, Breaking Capacity 3 kA, Fixed Mount
  • RS Stock No. 231-9295
  • Mfr. Part No. 1SDA066809R1 XT1B 160 TMD 160A FF
Each
MYR1,931.57
In Stock
Better World
Schneider Electric PowerPact Distribution Board, 630 A
  • RS Stock No. 247-2139
  • Mfr. Part No. MG64M
Each
MYR12,320.93
In Stock
Schneider Electric Resi9 Distribution Board, 63 A
  • RS Stock No. 276-8946
  • Mfr. Part No. R9H13401
Each
MYR191.58
In Stock
Sato Parts 5A PCB Mount Fuse Holder for 5 x 20mm Fuse, 125V ac
  • RS Stock No. 523-4949
  • Mfr. Part No. F-60-C
Each
MYR3.64
Temporarily out of stock
Siemens SENTRON 5SJ MCB, 1P, 1A
  • RS Stock No. 232-2216
  • Mfr. Part No. 5SJ4101-8HG41
Each
MYR391.02
In Stock
Littelfuse 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4331
  • Mfr. Part No. 0217.400MXP
Each (In a Pack of 10)
MYR1.274
Temporarily out of stock
Better World
Siemens 3VA91 RCD, 160A, 3 Pole, Type B
  • RS Stock No. 218-1787
  • Mfr. Part No. 3VA9113-0RL21
Each
MYR8,084.61
1
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