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

57 of 999+
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 232-0250
  • Mfr. Part No. 1SDA067397R1 XT1C 160 TMD 100A FF
Each
SGD375.70(exc. GST)
In Stock
Schurter 3.15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4230P
  • Mfr. Part No. 8020.5016.G
Each (Supplied in a Bag)
SGD1.205(exc. GST)
In Stock
Eaton 6A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-327
  • Mfr. Part No. AAO6
Each (In a Pack of 5)
SGD9.112(exc. GST)
Temporarily out of stock
Siemens 800A Centred Tag Fuse, NH3, 690V
  • RS Stock No. 210-6969
  • Mfr. Part No. 3NE1438-2
Each (In a Pack of 3)
SGD491.70(exc. GST)
In Stock
ABB PS3 3 Phase Busbar, 400V ac, 17.5mm Pitch
  • RS Stock No. 489-7218
  • Mfr. Part No. 2CDL230001R1060 - PS3/60
Each
SGD189.05(exc. GST)
In Stock
Littelfuse 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 820-7259
  • Mfr. Part No. LPHV0001Z
Each
SGD34.80(exc. GST)
In Stock
Eaton 160A Centred Tag Fuse, NH1, 690V ac
  • RS Stock No. 703-8796
  • Mfr. Part No. 160NHG1B-690
Each
SGD21.34(exc. GST)
In Stock
Littelfuse Fuse Holder Water Proof Holder
  • RS Stock No. 738-2784P
  • Mfr. Part No. FHAC0001ZXJ
Each (Supplied in a Box)
SGD10.54(exc. GST)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 3A, 250V ac
  • RS Stock No. 852-7200
  • Mfr. Part No. PCC-3-R
Each
SGD7.62(exc. GST)
Temporarily out of stock
Eaton RCCB, 40A, 4 Pole, 100mA, Type AC, 230 V ac, 400 V ac
  • RS Stock No. 227-0726
  • Mfr. Part No. 264301 PFGM-40/4/01
Each
SGD392.42(exc. GST)
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 800A, Fixed Mount
  • RS Stock No. 247-1811
  • Mfr. Part No. 33469
Each
SGD5,504.81(exc. GST)
In Stock
Schneider Electric, ComPact ComPact NSX400, ComPact ComPact NSX630, ComPact ComPact NSX DC, PowerPact PowerPact L
  • RS Stock No. 288-1497
  • Mfr. Part No. LV432648
Each
SGD401.94(exc. GST)
In Stock
ABB Tmax XT Rotary Handle for use with SACE Tmax XT
  • RS Stock No. 236-6856
  • Mfr. Part No. 1SDA069057R1 RHE_B XT2-XT4 F/P BASE RH
Each
SGD105.45(exc. GST)
In Stock
SIBA 315mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 736-1412
  • Mfr. Part No. 70-172-40/0.315A
Each
SGD8.67(exc. GST)
Temporarily out of stock
ABB High Performance S800N MCB, 4P, 63A Curve C, 690V AC, 375V DC, 36 kA Breaking Capacity
  • RS Stock No. 183-3682
  • Mfr. Part No. 2CCS894001R0634
Each
SGD499.84(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 A9F04 Circuit Breaker, 3P, 6A Curve C, 500V AC, 6000 A Breaking Capacity
  • RS Stock No. 655-490
  • Mfr. Part No. A9F04306
Each
SGD218.09(exc. GST)
Temporarily out of stock
Better World
Siemens RCBO, 125A Current Rating, 3P+N Poles, Type C, Sentron Range
  • RS Stock No. 243-6263
  • Mfr. Part No. 5SU1844-7WK82
Each
SGD3,334.42(exc. GST)
In Stock
RS PRO 2A FF Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 420-094
Each (In a Pack of 10)
SGD1.843(exc. GST)
Temporarily out of stock
Schneider Electric, C100 MCCB 3P 1kA, Breaking Capacity 415 V ac, Fixed Mount
  • RS Stock No. 335-054
  • Mfr. Part No. C100H3FM
Each
SGD6,273.90(exc. GST)
In Stock
RS PRO Thermal Circuit Breaker -, 4A Current Rating
  • RS Stock No. 774-0033
Each
SGD8.17(exc. GST)
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