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

100 of 999+
In Stock
Eaton 2A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 851-1763
  • Mfr. Part No. MDQ-2
Each (In a Pack of 5)
SGD19.016(exc. GST)
Being discontinued
RS PRO 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-334
Each (In a Pack of 10)
SGD0.485(exc. GST)
In Stock
Mersen 15A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0524
  • Mfr. Part No. HP10M15
Each (In a Box of 10)
SGD15.821(exc. GST)
In Stock
TE Connectivity Thermal Circuit Breaker - W28 SP Pole 32 V dc, 250 V ac Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 167-5699
  • Mfr. Part No. W28-XQ1A-15
Each
SGD10.24(exc. GST)
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 232-0218
  • Mfr. Part No. 1SDA066818R1 XT1B 160 TMD 100A FF
Each
SGD601.55(exc. GST)
In Stock
brennenstuhl BD 4 Phase Distribution Board, 4 Way, 30 mA
  • RS Stock No. 270-2188
  • Mfr. Part No. 1154911
Each
SGD303.95(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-4268
  • Mfr. Part No. 1SDA072397R1
Each
SGD18,485.61(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 63A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7611
  • Mfr. Part No. 2CDS253001R0635 S203-B63
Each
SGD106.48(exc. GST)
In Stock
Better World
Schneider Electric Compact Nsx, Compact Nsx Dc Plug In Kit for use with Compact Nsx 400/630
  • RS Stock No. 221-1251
  • Mfr. Part No. LV432538
Each
SGD1,203.44(exc. GST)
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 4A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2795
  • Mfr. Part No. 2908261
Each
SGD74.86(exc. GST)
Temporarily out of stock
ABB, Tmax XT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-7291
  • Mfr. Part No. 1SDA067463R1 XT1H 160 TMD 125A FF
Each
SGD994.30(exc. GST)
In Stock
Mersen 630A size 32 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2158
  • Mfr. Part No. M300069
Each
SGD325.08(exc. GST)
In Stock
Schurter 1.6A M Glass Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7382
  • Mfr. Part No. 0034.2518
Each (In a Pack of 10)
SGD0.798(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 32A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9147
  • Mfr. Part No. A9F77232
Each
SGD187.96(exc. GST)
In Stock
Schurter 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2669
  • Mfr. Part No. 8020.0604.G
Each (In a Pack of 10)
SGD1.356(exc. GST)
In Stock
RS PRO MCB, 3P, 63A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0210
Each
SGD28.10(exc. GST)
In Stock
Mersen 25A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 377-0279
  • Mfr. Part No. W213160
Each (In a Pack of 5)
SGD1.974(exc. GST)
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 500A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9793
  • Mfr. Part No. LV563305
Each
SGD1,946.87(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 1+N, 2A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 238-3409
  • Mfr. Part No. A9P71602
Each
SGD63.91(exc. GST)
In Stock
Phoenix Contact CLIPLINE Thermal Circuit Breaker - UT 6-TMC Single Pole 250V Voltage Rating DIN Rail Mount, 1A Current
  • RS Stock No. 684-3585
  • Mfr. Part No. 0916604
Each
SGD33.06(exc. GST)
1
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