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

49110 Products showing for Fuses & Circuit Breakers

84 of 999+
In Stock
Schneider Electric TeSys GV6P MCB, 3P, 500A, 690V AC, 70 kA Breaking Capacity
  • RS Stock No. 188-4755
  • Mfr. Part No. GV6P500H
Each
SGD2,707.82(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 10A, 125V ac/dc
  • RS Stock No. 541-3322P
  • Mfr. Part No. 0251010.HAT1L
Each (Supplied in a Bag)
SGD1.438(exc. GST)
In Stock
Better World
Schneider Electric Cable Connector for use with INS100...250, INV100...250, NSX100, NSX160, NSX250
  • RS Stock No. 248-4110
  • Mfr. Part No. LV429245
Each
SGD160.06(exc. GST)
In Stock
Eaton 200A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 703-8706P
  • Mfr. Part No. 200NHG1B
Each (Supplied in a Box)
SGD21.28(exc. GST)
Temporarily out of stock
Eaton 800A Centred Tag Fuse, NH4, 500V ac
  • RS Stock No. 182-1529
  • Mfr. Part No. 800NHG4G
Each
SGD277.88(exc. GST)
In Stock
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 20A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8606
  • Mfr. Part No. EZ9F16120
Each
SGD7.08(exc. GST)
Temporarily out of stock
Phoenix Contact 1 Phase Industrial Surge Protector, 10kA
  • RS Stock No. 220-5785
  • Mfr. Part No. 1106013
Each
SGD312.76(exc. GST)
In Stock
Eaton 25A DII Bottle Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 181-8716
  • Mfr. Part No. 25D27
Each
SGD3.10(exc. GST)
In Stock
Littelfuse 200A Blue BF2 Car Fuse, 32V dc
  • RS Stock No. 431-6826
  • Mfr. Part No. 153.5395.6201
Each (In a Pack of 5)
SGD13.494(exc. GST)
In Stock
Phoenix Contact 2 Phase Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 201-6257
  • Mfr. Part No. 2906820
Each
SGD178.31(exc. GST)
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 2.5A, 250V ac
  • RS Stock No. 377-2174
  • Mfr. Part No. 3821250041
Each (In a Pack of 10)
SGD2.159(exc. GST)
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 800A, Fixed Mount
  • RS Stock No. 232-0129
  • Mfr. Part No. 1SDA060214R1 T6N800 FF TMA 800A
Each
SGD4,194.93(exc. GST)
In Stock
Mersen 2A Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 715-8995
  • Mfr. Part No. DCT2-2
Each
SGD41.67(exc. GST)
In Stock
Schneider Electric 250A Neutral Link for BS Fuses, 6.5mm x 38mm
  • RS Stock No. 417-307
  • Mfr. Part No. NL250
Each
SGD53.58(exc. GST)
In Stock
Eaton 1.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-2999
  • Mfr. Part No. GMA-1-5-R
Each
SGD2.89(exc. GST)
Temporarily out of stock
ABB F200 RCCB, 40A, 4 Pole, 100mA, Type AC, 230V ac
  • RS Stock No. 225-6119
  • Mfr. Part No. 2CSF204001R2400 F204 AC-40/0,1
Each
SGD261.40(exc. GST)
In Stock
ABB FH200 RCCB, 40A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 186-3459
  • Mfr. Part No. 2CSF202102R1400
Each
SGD124.84(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1+N, 6A Curve C, 253V AC, 72V DC, 20 kA Breaking Capacity
  • RS Stock No. 225-5998
  • Mfr. Part No. 2CDS251103R0064
Each
SGD85.27(exc. GST)
In Stock
SIBA 1.6A M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3559
  • Mfr. Part No. 70-010-05/1.6A
Each (In a Pack of 5)
SGD6.414(exc. GST)
Temporarily out of stock
nVent HOFFMAN Busbar
  • RS Stock No. 270-1575
  • Mfr. Part No. TNS2
Each (In a Pack of 2)
SGD6.90(exc. GST)
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