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

47265 Products showing for Fuses & Circuit Breakers

48 of 999+
In Stock
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS Stock No. 273-0854
  • Mfr. Part No. 1658-G21-02-P10-5A
Each
HK$54.00
In Stock
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 200A, Fixed Mount
  • RS Stock No. 232-0279
  • Mfr. Part No. 1SDA068220R1 XT3S 250 TMD 200A FF
Each
HK$5,696.20
In Stock
SIBA 250mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3217
  • Mfr. Part No. 70-007-33/0.25A
Each (In a Pack of 10)
HK$6.16
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4155
  • Mfr. Part No. 3VA1110-3EF36-0AA0
Each
HK$4,275.20
Temporarily out of stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 16A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 772-1319
  • Mfr. Part No. 5SY4216-7
Each
HK$762.50
In Stock
Better World
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti 9 Range
  • RS Stock No. 790-9222
  • Mfr. Part No. A9D31832
Each
HK$1,383.60
In Stock
Littelfuse 125mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4280
  • Mfr. Part No. 0217.125MXP
Each (In a Pack of 10)
HK$7.08
In Stock
Mersen 10A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6805
  • Mfr. Part No. W084314
Each (In a Pack of 10)
HK$39.98
Temporarily out of stock
Siemens SENTRON 3VA9 Rotary Operator for use with 3VA15/25 1000
  • RS Stock No. 218-1867
  • Mfr. Part No. 3VA9687-0EK11
Each
HK$1,993.90
In Stock
Littelfuse Blade Fuse Kit
  • RS Stock No. 820-7284
  • Mfr. Part No. 00940553Z
Each
HK$738.10
Temporarily out of stock
Schneider Electric Acti9 iARC AFDD, 40A, 1 Pole, 230V ac
  • RS Stock No. 654-745
  • Mfr. Part No. A9TSB3640
Each
HK$2,741.42
In Stock
Littelfuse 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 600V ac
  • RS Stock No. 769-3772
  • Mfr. Part No. L60030M1SQ
Each
HK$87.10
In Stock
Schurter Non-Resettable Fuse Kit
  • RS Stock No. 539-3802
  • Mfr. Part No. 0034.9871
Each
HK$1,111.40
In Stock
ABB FS401 RCCB, 16A, 1+N Pole, 30mA, Type C
  • RS Stock No. 178-106
  • Mfr. Part No. 2CCL562111E0164 - FS401E-C16/0.03
Each
HK$1,194.70
In Stock
Hager NFT MCB, 3P, 32A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4734
  • Mfr. Part No. NFT332
Each
HK$1,400.80
In Stock
Phoenix Contact Thermal Circuit Breaker - TCP 1A Single Pole 250V ac Voltage Rating On Base Element, 1A Current Rating
  • RS Stock No. 801-6892
  • Mfr. Part No. 0712194
Each
HK$121.40
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti 9 Range
  • RS Stock No. 790-9305
  • Mfr. Part No. A9D11820
Each
HK$1,358.30
In Stock
Eaton 5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-611
  • Mfr. Part No. TDC11-5A
Each (In a Pack of 10)
HK$41.62
In Stock
Eaton 2A T Phenolic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7134
  • Mfr. Part No. HVI-HH-R
Each
HK$34.90
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve K, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-8015
  • Mfr. Part No. 2CDS252001R0557 S202-K40
Each
HK$768.70
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