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

278 / 999+
Temporarily out of stock
Siemens Fuse Holder Cap
  • RS Stock No. 167-682
  • Mfr. Part No. 5SH1170
1 Pack of 5
MYR391.89
In Stock
Eaton Fuse Holder Locking Kit
  • RS Stock No. 262-566
  • Mfr. Part No. RS20LOCK
1 Pack of 10
MYR1,013.00
In Stock
Eaton xEffect MCB, 1P, 6A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 624-0349
  • Mfr. Part No. 278555 FAZ-C6/1
Each
MYR210.07
Temporarily out of stock
Hager CFC RCCB, 40A, 3P+N Pole, 300mA, Type AC, 230 → 400V ac
  • RS Stock No. 597-887
  • Mfr. Part No. CFC841F
Each
MYR993.96
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 20A Curve B, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-978
  • Mfr. Part No. 2CDS271061R0205
Each
MYR837.23
Temporarily out of stock
Siemens 10V ac Auxiliary Switch
  • RS Stock No. 223-7680
  • Mfr. Part No. 5TT4930
Each
MYR202.36
Temporarily out of stock
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 221-5625
  • Mfr. Part No. 3-128-233
Each
MYR80.19
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0786
  • Mfr. Part No. 3WA9111-0AN21
Each
MYR685.15
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-311
  • Mfr. Part No. KV PC 9336
Each
MYR1,336.20
In Stock
Littelfuse 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 878-3772
  • Mfr. Part No. 02183.15HXP
Each (In a Pack of 50)
MYR1.304
In Stock
ABB Electronic Time Delay for use with E1, E1.2, E2, E2.2, E3, E4, E4.2, E6, E6.2, T7, T8, X1, XT7-XT7M
  • RS Stock No. 250-4512
  • Mfr. Part No. 1SDA038316R1
Each
MYR2,032.63
In Stock
ABB SMISSLINE TP S400M MCB, 1P, 4A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 176-352
  • Mfr. Part No. 2CCS571001R0044 S401M-C4
Each
MYR245.83
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 320A, Fixed Mount
  • RS Stock No. 232-0094
  • Mfr. Part No. 1SDA054436R1 T5N400 FF TMA 320A
Each
MYR7,209.01
In Stock
Schneider Electric 8A GG Cartridge Fuse, 8.5 x 31.5mm
  • RS Stock No. 590-001
  • Mfr. Part No. DF2BN0800
1 Pack of 10
MYR76.07
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 3 channels
  • RS Stock No. 259-3251
  • Mfr. Part No. 1SDA071149R1
Each
MYR84,098.33
In Stock
Littelfuse PCB Mount ATO Blade Fuse Block, 80V
  • RS Stock No. 787-4384
  • Mfr. Part No. 178.7017.0001
Each
MYR61.54
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 4 channels
  • RS Stock No. 157-315
  • Mfr. Part No. 3VA2225-0HN42-0AA0
Each
MYR17,715.07
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 3P, 3A Curve B, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-298
  • Mfr. Part No. 5SY4303-6
Each
MYR543.28
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3733
  • Mfr. Part No. 1SDA071709R1
Each
MYR93,762.59
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 25 kA
  • RS Stock No. 210-1651
  • Mfr. Part No. 3VA1132-3EF42-0AA0
Each
MYR2,112.68
1
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