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

4 of 999+
Temporarily out of stock
RS PRO 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3515
Each (In a Pack of 10)
SGD0.637(exc. GST)
In Stock
RS PRO 1.25A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3483
Each (In a Pack of 10)
SGD0.41(exc. GST)
In Stock
Eaton 5A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-576
  • Mfr. Part No. TDC180-5A
Each (In a Pack of 10)
SGD2.34(exc. GST)
In Stock
Better World
Siemens SENTRON MCB, 1P, 16A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 189-3188
  • Mfr. Part No. 5SL6116-6
Each
SGD9.16(exc. GST)
Being discontinued
RS PRO 15A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6051
Each (In a Pack of 10)
SGD0.516(exc. GST)
In Stock
Eaton 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 849-5762
  • Mfr. Part No. GMC-3-15-R
Each
SGD1.69(exc. GST)
Temporarily out of stock
ABB PS2 2 Phase Busbar, 400V
  • RS Stock No. 231-9636
  • Mfr. Part No. 2CDL220001R1612 PS2/12/16
1 Box of 1
SGD25.05(exc. GST)
In Stock
Eaton 30A Bolt In Mount 6.3 x 32mm Fuse Block, 300V ac/dc
  • RS Stock No. 852-7231
  • Mfr. Part No. S-8301-1-R
Each
SGD16.21(exc. GST)
In Stock
Mersen 63A DIII Diazed Fuse, E33 Thread Size, gG, 500V
  • RS Stock No. 377-0522
  • Mfr. Part No. R215088
Each (In a Pack of 5)
SGD5.686(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SJ4 MCB, 1P, 10A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7071
  • Mfr. Part No. 5SJ4110-7HG40
Each
SGD90.67(exc. GST)
In Stock
Littelfuse 150A Orange Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4394
  • Mfr. Part No. 0298150.ZXEH
Each
SGD10.07(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 50A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3183
  • Mfr. Part No. A9F53150
Each
SGD61.58(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 1P, 4A Curve C, 15 kA Breaking Capacity
  • RS Stock No. 219-9263
  • Mfr. Part No. A9F94104
Each
SGD101.75(exc. GST)
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P+N, 690V ac
  • RS Stock No. 189-5334
  • Mfr. Part No. G1062698 / CMC101N
Each
SGD27.01(exc. GST)
In Stock
Eaton 250mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1262
  • Mfr. Part No. S500-250-R
Each (In a Pack of 10)
SGD4.425(exc. GST)
In Stock
Littelfuse 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2797P
  • Mfr. Part No. 0218002.MXP
Each (Supplied in a Bag)
SGD1.255(exc. GST)
In Stock
Wickmann 50A Black Bolt Down Car Fuse, 32V dc
  • RS Stock No. 174-0733
  • Mfr. Part No. 0498050.M
Each (In a Pack of 10)
SGD2.376(exc. GST)
In Stock
Legrand 4115 RCD, 40A, 1+N Pole, 30mA, Type A
  • RS Stock No. 863-7773
  • Mfr. Part No. 4 115 55
Each
SGD131.71(exc. GST)
Temporarily out of stock
HENSEL 1, 3 Phase Distribution Board, 54 Way, 63 A
  • RS Stock No. 183-2863
  • Mfr. Part No. KV9354M
Each
SGD536.51(exc. GST)
In Stock
SIBA 1.25A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3302
  • Mfr. Part No. 70-007-65/1.25A
Each (In a Pack of 10)
SGD0.601(exc. GST)
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