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

47115 Products showing for Fuses & Circuit Breakers

1 of 999+
In Stock
RS PRO F, T Fuse Kit
  • RS Stock No. 893-8530
Each
HK$684.70
Temporarily out of stock
Eaton Fuse Holder Locking Kit
  • RS Stock No. 262-566
  • Mfr. Part No. RS20LOCK
1 Pack of 10
HK$2,101.80
In Stock
Schneider Electric Multi9 C60SP Miniature Circuit Breaker, 1-Pole, 16 A, Type B, 415 V ac AC, 60 V DC, 10 kA Breaking
  • RS Stock No. 211-2333
  • Mfr. Part No. M9F21116
Each
HK$104.40
In Stock
RS PRO F, T Fuse Kit
  • RS Stock No. 893-8537
Each
HK$650.00
In Stock
Schurter 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4234
  • Mfr. Part No. 8020.5017.G
Each (In a Pack of 10)
HK$6.84
Limited stock
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3414
Each (In a Pack of 10)
HK$2.80
In Stock
Bourns 1.85A Resettable Fuse, 15V
  • RS Stock No. 245-9147
  • Mfr. Part No. MF-LSMF185X-2
Each (On a Tape of 10)
HK$3.00
In Stock
Littelfuse 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3495
  • Mfr. Part No. 0219002.MXAP
Each (In a Pack of 10)
HK$7.55
In Stock
Schneider Electric Busbar Trunking Blanking Plate, Canalis KBC Series
  • RS Stock No. 219-8883
  • Mfr. Part No. KBC16ZB1
Each (In a Pack of 10)
HK$64.24
In Stock
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 5A Current Rating
  • RS Stock No. 333-265
  • Mfr. Part No. 201-5A
Each
HK$321.50
In Stock
Eaton 32A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 703-8462
  • Mfr. Part No. C22G32
Each (In a Pack of 10)
HK$23.57
Temporarily out of stock
Siemens 5SV5 RCCB, 40A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 202-7100
  • Mfr. Part No. 5SV5344-6KL
Each
HK$765.90
In Stock
Bourns 1.5A Resettable Fuse, 15V
  • RS Stock No. 691-7591
  • Mfr. Part No. MF-SMDF150-2
Each (In a Pack of 5)
HK$3.60
Currently unavailable
Schneider Electric IID RCCB, 40A, 4 Pole, 30mA, Type A, 380 → 415V ac
  • RS Stock No. 230-6688
  • Mfr. Part No. A9R51440
Each
HK$858.21
Temporarily out of stock
Eaton, PN1 Molded Case Circuit Breaker 1-Pole 100 A, Breaking Capacity 2.8 kA
  • RS Stock No. 628-8060
  • Mfr. Part No. 259141 PN1-100
1 Box of 1
HK$2,867.00
In Stock
Schurter 6.3A Inline Fuse Holder for 5 x 20mm Fuse, 32V dc
  • RS Stock No. 173-7933
  • Mfr. Part No. 8601.2001.08
Each (In a Box of 50)
HK$11.276
In Stock
Eaton 63A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1552
  • Mfr. Part No. XS63
Each (In a Box of 10)
HK$465.64
In Stock
Littelfuse 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4628
  • Mfr. Part No. 0216002.MXP
Each (In a Pack of 10)
HK$10.03
In Stock
Schneider Electric iID RCCB, 63A, 4 Pole, 300mA, Type B-SI, 400V ac
  • RS Stock No. 248-3725
  • Mfr. Part No. A9Z64463
Each
HK$12,009.80
Temporarily out of stock
Siemens, SENTRON, SENTRON Molded Case Circuit Breaker 4-Pole 100 A, Breaking Capacity 10 kA, Surface
  • RS Stock No. 210-1614
  • Mfr. Part No. 3VA1110-5EF46-0AA0
Each
HK$6,603.80
1
2
3
2356
Results per page

Related links