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

175 of 999+
Last RS stock
Phoenix Contact Non Resettable Fuse 1A, 250V
  • RS Stock No. 135-568
  • Mfr. Part No. 2901005
Each
HK$157.70
In Stock
RS PRO MCB, 3P, 63A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0210
Each
HK$361.30
In Stock
Eaton xE?ect - FRCmM-NA RCCB, 25A, 2 Pole, 30mA, 110/190V
  • RS Stock No. 121-162
  • Mfr. Part No. 167693 FRCMM-25/2/003-G/A-NA-110
Each
HK$2,060.20
Temporarily out of stock
Eaton xEffect RCCB, 100A, 2 Pole, 100mA, Type F, 240V ac
  • RS Stock No. 246-624
  • Mfr. Part No. 187376 FRCMM-100/2/01-G/F
Each
HK$9,569.90
Temporarily out of stock
Eaton xE?ect - FRCmM-NA RCCB, 40A, 4 Pole, 30mA, 110/190V
  • RS Stock No. 121-098
  • Mfr. Part No. 167706 FRCMM-40/4/003-G/A-NA-110
Each
HK$2,645.00
In Stock
Eaton xE?ect - FRCmM-NA RCCB, 25A, 4 Pole, 30mA, Type A, 240/415V ac
  • RS Stock No. 120-728
  • Mfr. Part No. 167125 FRCMM-25/4/003-A-NA
Each
HK$1,927.30
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 32A Curve K, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-8006
  • Mfr. Part No. 2CDS252001R0537 S202-K32
Each
HK$635.00
Temporarily out of stock
Eaton xEffect RCCB, 63A, 2 Pole, 300mA, Type F, 240V ac
  • RS Stock No. 248-935
  • Mfr. Part No. 187380 FRCMM-63/2/03-G/F
Each
HK$3,658.50
Temporarily out of stock
Eaton xE?ect - FRCmM-NA RCCB, 25A, 4 Pole, 300mA, 110/190V
  • RS Stock No. 121-100
  • Mfr. Part No. 167708 FRCMM-25/4/03-G/A-NA-110
Each
HK$2,060.20
Temporarily out of stock
Eaton xE?ect - FRCmM-NA RCCB, 40A, 2 Pole, 30mA, Type A, 240/415V ac
  • RS Stock No. 120-288
  • Mfr. Part No. 167114 FRCMM-40/2/003-A-NA
Each
HK$2,299.40
In Stock
Eaton Electronic Circuit breaker 4A
  • RS Stock No. 774-0174
  • Mfr. Part No. 121724 PKE-XTU-4
Each
HK$991.10
In Stock
Eaton 25A 6.3 x 32mm Fuse Block, 250V ac
  • RS Stock No. 233-0597
  • Mfr. Part No. BK2-S-4201-1X-R
Each (In a Pack of 10)
HK$10.85
Temporarily out of stock
Hager BFH RCCB, 63A, 4 Pole, 300mA
  • RS Stock No. 602-077
  • Mfr. Part No. BFH866
Each
HK$5,835.50
Temporarily out of stock
Eaton xE?ect - FRCmM-NA RCCB, 25A, 4 Pole, 30mA, Type A, 110/190V
  • RS Stock No. 121-169
  • Mfr. Part No. 167699 FRCMM-25/4/003-A-NA-110
Each
HK$2,060.20
Temporarily out of stock
Eaton Earthing Strap
  • RS Stock No. 243-393
  • Mfr. Part No. 141844 XNAE4-18
1 Pack of 20
HK$1,136.40
Temporarily out of stock
700A 4.133 x 3in Modular Fuse Fuse Block, 1.2kV
  • RS Stock No. 261-877
  • Mfr. Part No. BH-3144
1 Pack of 10
HK$69,481.60
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 5A Current Rating
  • RS Stock No. 217-6380
  • Mfr. Part No. 2800895
Each
HK$745.60
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 3P, 1A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-191
  • Mfr. Part No. 2CDS273061R0217
Each
HK$4,271.38
In Stock
Schurter SMD Non Resettable Fuse 500mA, 63V ac/dc
  • RS Stock No. 782-3724
  • Mfr. Part No. 3402.0045.11
Each (In a Pack of 10)
HK$7.16
Temporarily out of stock
Eaton 160A Fuse Holder for 110 x 200mm Fuse, 3P, 690V
  • RS Stock No. 262-022
  • Mfr. Part No. EBH000O3TS5
Each
HK$440.90
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