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

32 of 999+
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 50A Curve C, 240V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 776-3468
  • Mfr. Part No. A9F77150
Each
R 319.18(exc. VAT)
In Stock
Siemens 230V ac Undervoltage Release Circuit Trip for use with 3RV2 Series Circuit Breakers
  • RS stock no. 706-1939
  • Mfr. Part No. 3RV2902-1AP0
Each
R 739.98(exc. VAT)
In Stock
Schurter 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 789-7785
  • Mfr. Part No. 0001.2512
Each (In a Bag of 10)
R 12.75(exc. VAT)
In Stock
Littelfuse 50A Red Blade Car Fuse, 32V dc
  • RS stock no. 894-9584
  • Mfr. Part No. 0299050.ZXNV
Each (In a Pack of 5)
R 45.308(exc. VAT)
In Stock
ETA Cover for use with 9510
  • RS stock no. 723-4840
  • Mfr. Part No. X200.801.08 M12 CLEAR COVER+PLATED NUT
Each
R 290.71(exc. VAT)
In Stock
Eaton 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 852-6945
  • Mfr. Part No. HTB-44M-R
Each
R 56.55(exc. VAT)
In Stock
ABB FH200 RCCB, 63A, 2 Pole, 30mA, Type AC, 230V
  • RS stock no. 186-3457
  • Mfr. Part No. 2CSF202002R1630
Each
R 1,701.90(exc. VAT)
In Stock
Eaton 100A Tag Fuse, NH000, 500V ac
  • RS stock no. 703-8651
  • Mfr. Part No. 100NHG000B
Each
R 187.70(exc. VAT)
Temporarily out of stock
ABB Emax E3N MCB, 3P, 2.5kA, 750V DC, 60 kA Breaking Capacity
  • RS stock no. 231-9290
  • Mfr. Part No. 1SDA064605R1 E3N 2500 PR122/DC In=2500A
Each
R 297,662.18(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 25A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS stock no. 790-8869
  • Mfr. Part No. A9F44125
Each
R 705.89(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS stock no. 746-7873
  • Mfr. Part No. 2CDS252001R0401 S202-D40
Each
R 1,206.33(exc. VAT)
In Stock
Eaton 10A Red Automotive Car Fuse, 32V dc No
  • RS stock no. 848-2558
  • Mfr. Part No. ATC-10
Each
R 19.30(exc. VAT)
In Stock
ETA ESX10 Electronic Circuit breaker 2A 24V ESX10-T, 1 channels , Plug-In Mounting
  • RS stock no. 210-2132
  • Mfr. Part No. ESX10-TB-101-DC24V-2A-E
Each
R 1,700.50(exc. VAT)
In Stock
Allen Bradley 1492 1492-SPM MCB, 1P, 2A Curve C, 277V AC, 48V DC, 10 kA Breaking Capacity
  • RS stock no. 125-1452
  • Mfr. Part No. 1492-SPM1C020
Each
R 521.85(exc. VAT)
In Stock
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 600V ac
  • RS stock no. 123-2017
  • Mfr. Part No. 0031.1622
Each
R 232.13(exc. VAT)
In Stock
RS PRO MCB, 2P, 4A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS stock no. 265-0176
Each
R 485.60(exc. VAT)
In Stock
Hager NFN MCB, 2P, 50A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS stock no. 144-4718
  • Mfr. Part No. NFN250
Each
R 3,734.87(exc. VAT)
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
R 1,718.01(exc. VAT)
Temporarily out of stock
Hager NFT MCB, 3P, 10A, 415V AC, 10 kA Breaking Capacity
  • RS stock no. 144-4730
  • Mfr. Part No. NFT310
Each
R 2,705.98(exc. VAT)
Temporarily out of stock
Altech 6A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 900-1550
  • Mfr. Part No. 6C10X38GI
Each (In a Pack of 10)
R 77.823(exc. VAT)
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