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
Fuses - PCB
Fuses - PCB

50687 Products showing for Fuses & Circuit Breakers

47 of 999+
In Stock
Eaton 400A Centred Tag Fuse, NH2, 690V ac
  • RS stock no. 182-1368
  • Mfr. Part No. 170M5808D
Each (In a Box of 3)
R 5,831.293(exc. VAT)
Temporarily out of stock
ABB S800PV MCB, 2P, 32A Curve B, 800V DC, 5 kA Breaking Capacity
  • RS stock no. 225-5922
  • Mfr. Part No. 2CCF019602R0001 S802PV-SP32 - 5 kA
Each
R 4,720.65(exc. VAT)
Temporarily out of stock
Schurter SMD Non Resettable Fuse 0.2A, 125V ac/dc
  • RS stock no. 188-4581
  • Mfr. Part No. 3-103-086
Each (On a Tape of 5)
R 92.216(exc. VAT)
In Stock
Eaton CI-K Enclosure for use with PKZM
  • RS stock no. 272-2317
  • Mfr. Part No. 260363 CI-K2H-PKZ0-G
Each
R 533.98(exc. VAT)
In Stock
Mersen Surge Protector, 40kA, Plug In Mount
  • RS stock no. 179-3076
  • Mfr. Part No. 83020006 / SP2-40K1000V-PV
Each
R 742.55(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS stock no. 191-6075
  • Mfr. Part No. A9DA6610
Each
R 6,574.63(exc. VAT)
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS stock no. 169-9501
  • Mfr. Part No. SR-5-3-15A-BK
Each (In a Bag of 200)
R 11.342(exc. VAT)
In Stock
Better World
Schneider Electric TeSys GV5P MCB, 3P, 220A, 690V AC, 70 kA Breaking Capacity
  • RS stock no. 188-4751
  • Mfr. Part No. GV5P220H
Each
R 23,459.41(exc. VAT)
Temporarily out of stock
ABB S802 Circuit Breaker, 2P, 10A Curve C, 690V AC, 250V DC, 4.5 kA Breaking Capacity
  • RS stock no. 287-6377
  • Mfr. Part No. 2CCS892001R0104
Each
R 3,097.84(exc. VAT)
In Stock
Better World
Siemens 5sV3 RCCB, 16A, 2 Pole, 10mA, Type A, 230V ac
  • RS stock no. 211-9625
  • Mfr. Part No. 5SV3111-6KL
Each
R 4,448.33(exc. VAT)
Temporarily out of stock
ABB S-ARC1 MCB, 1+N, 10A Curve B, 240V AC, 6 kA Breaking Capacity
  • RS stock no. 175-9925
  • Mfr. Part No. 2CSA255901R9105 S-ARC1 B10
Each
R 4,110.98(exc. VAT)
Temporarily out of stock
RS PRO 160mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 177-8048
1 Box of 1000
R 2,661.11(exc. VAT)
Temporarily out of stock
Schneider Electric Surge Arrester, 20kA, 48V dc, Fixed Mount
  • RS stock no. 288-7106
  • Mfr. Part No. A9L16339
Each
R 11,657.90(exc. VAT)
In Stock
Eaton 500A Centred Tag Fuse, NH2, 690 V, 700 V
  • RS stock no. 182-1359
  • Mfr. Part No. 170M5810D
Each (In a Box of 3)
R 7,175.283(exc. VAT)
In Stock
Eaton XComfort IKA Distribution Board, 8 Way
  • RS stock no. 282-7020
  • Mfr. Part No. 174196 IKA-1/8-ST
Each
R 1,367.68(exc. VAT)
In Stock
Better World
Schneider Electric 125A Cartridge Fuse, 22 x 58mm
  • RS stock no. 219-9071
  • Mfr. Part No. DF2FA125
Each (In a Pack of 10)
R 888.873(exc. VAT)
In Stock
Eaton 25A Clear Blade Car Fuse, 32V dc
  • RS stock no. 852-7354
  • Mfr. Part No. ATC-25
Each
R 20.19(exc. VAT)
In Stock
Eaton 25A Centred Tag Fuse, NH01, 500V ac
  • RS stock no. 182-1661
  • Mfr. Part No. 25NHG01B
Each
R 189.33(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 63A Curve B, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS stock no. 212-8979
  • Mfr. Part No. 5SY7563-6
Each
R 2,078.62(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, PowerPact MCCB 3P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS stock no. 219-8425
  • Mfr. Part No. NLGF36600U31XTW
Each
R 85,564.66(exc. VAT)
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