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

46 of 999+
In Stock
Eaton 6A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7168
  • Mfr. Part No. MDL-6-R
Each
SGD2.50(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 40A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 131-905
  • Mfr. Part No. 2CDS272001R0404 S202M-C40
Each
SGD107.76(exc. GST)
In Stock
Eaton 10A Red Automotive Car Fuse, 32V dc No
  • RS Stock No. 848-2558
  • Mfr. Part No. ATC-10
Each
SGD4.95(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 5SV6 MCB, 2P, 6A, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 209-6582
  • Mfr. Part No. 5SV6016-7GV06
Each (In a Pack of 12)
SGD281.878(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 200A, Fixed Mount
  • RS Stock No. 254-6360
  • Mfr. Part No. C25N3TM200
Each
SGD2,833.17(exc. GST)
Temporarily out of stock
Siemens SENTRON Nut Keeper Kit for use with 3VA1 250
  • RS Stock No. 210-9329
  • Mfr. Part No. 3VA9214-0QA00
Each
SGD62.76(exc. GST)
In Stock
RS PRO 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8099
Each (In a Pack of 5)
SGD2.214(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 6A Curve B, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-093
  • Mfr. Part No. 2CDS272001R0065 S202M-B6
Each
SGD89.11(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3140 3 Pole 230V Voltage Rating Snap In, 2.5A Current Rating
  • RS Stock No. 729-2824
  • Mfr. Part No. 3140-F230-P7T1-SGRX-2.5A
Each
SGD108.02(exc. GST)
In Stock
Siemens SENTRON 5SL66 MCB, 3P+N, 6A Curve B, 440V AC, 62.5V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-356
  • Mfr. Part No. 5SL6606-6
Each
SGD216.71(exc. GST)
In Stock
Murrelektronik Limited Electronic Circuit Breaker
  • RS Stock No. 123-6690
  • Mfr. Part No. 9000-41034-0401000
Each
SGD499.32(exc. GST)
In Stock
Eaton, xEnergy MCCB 3P 200A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 628-8054
  • Mfr. Part No. 265725 NZMN2-M200
1 Box of 1
SGD1,302.87(exc. GST)
Temporarily out of stock
Schneider Electric, EasyPact Circuit breaker 4P 400A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 100-834
  • Mfr. Part No. EZC400H4350N
Each
SGD2,393.67(exc. GST)
In Stock
RS PRO HBC Fuse Kit
  • RS Stock No. 611-8983
Each
SGD259.55(exc. GST)
Temporarily out of stock
Schneider Electric Acti 9 Plug-in Base for use with ARA, IC60, iDPN Vigi, iLD, ISW, ISW-NA, RCA, Reflex iC60
  • RS Stock No. 791-2761
  • Mfr. Part No. A9A27003
Each
SGD87.40(exc. GST)
In Stock
Hager MJT MCB, 2P, 20A Curve C, 240 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4951
  • Mfr. Part No. MJT720
Each
SGD47.08(exc. GST)
In Stock
RS PRO MCB, 1P, 32A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0201
Each
SGD15.65(exc. GST)
In Stock
Better World
RS PRO 20A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 239-4982
Each (In a Pack of 10)
SGD10.423(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 30A, Breaking Capacity 14 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-564
  • Mfr. Part No. 3VA5130-4ED31-1AA0
Each
SGD411.93(exc. GST)
In Stock
SIBA 35A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 421-671
  • Mfr. Part No. 20-000-13/35E1
Each (In a Pack of 3)
SGD12.113(exc. GST)
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