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

110 of 999+
In Stock
Mersen 63A Bottle Fuse Holder, 3P, 400V ac
  • RS Stock No. 715-9023
  • Mfr. Part No. B1012622
Each
SGD216.06(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 125A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9737
  • Mfr. Part No. 3VA1112-6ED36-0AA0
Each
SGD754.63(exc. GST)
In Stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)1(-4), NZM1(-4), PN1(-4)
  • RS Stock No. 254-555
  • Mfr. Part No. 266632 NZM1-XHBR
Each
SGD207.05(exc. GST)
In Stock
Eaton RCBO, 13A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, PXK Range
  • RS Stock No. 183-3544
  • Mfr. Part No. 236963 PXK-C13/1N/003-A
Each
SGD155.68(exc. GST)
Temporarily out of stock
Eaton xEffect MCB, 2P, 25A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4438
  • Mfr. Part No. 239090 FAZ6-B25/2
Each
SGD99.07(exc. GST)
In Stock
Siemens 24V dc Undervoltage Release Circuit Trip for use with 3RV2 Series Circuit Breakers
  • RS Stock No. 706-1923
  • Mfr. Part No. 3RV2902-1AB4
Each
SGD199.89(exc. GST)
Currently unavailable
RS PRO Thermal Circuit Breaker -, 13A Current Rating
  • RS Stock No. 774-0036
Each
SGD14.13(exc. GST)
In Stock
Better World
Schneider Electric Industrial Surge Protection, 5kA, DIN Rail Mount
  • RS Stock No. 247-1960
  • Mfr. Part No. A9L20501
Each
SGD673.98(exc. GST)
Limited stock
Better World
Schneider Electric 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 482-871
  • Mfr. Part No. DF143C
Each
SGD124.17(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
ABB System Pro M Compact S200 MCB, 4P, 20A Curve D, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7924
  • Mfr. Part No. 2CDS254001R0201 S204-D20
Each
SGD264.99(exc. GST)
In Stock
Better World
Siemens RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 151-1198
  • Mfr. Part No. 5SU1354-7KK10
Each
SGD231.67(exc. GST)
Limited stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 6A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2018
  • Mfr. Part No. 5SY4106-7
Each
SGD39.33(exc. GST)
In Stock
Better World
ABB Compact Home SH200 MCB, 2P, 6A Curve C, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 231-9655
  • Mfr. Part No. 2CDS212001R0064 SH202-C 6
1 Box of 1
SGD73.50(exc. GST)
In Stock
Eaton 120A British Standard Fuse, FEE, 690V, 70mm
  • RS Stock No. 156-9027
  • Mfr. Part No. 120FEE
Each
SGD100.81(exc. GST)
In Stock
ABB High Performance S800N MCB, 3P, 80A Curve D, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-324
  • Mfr. Part No. 2CCG001244R0001
Each
SGD566.16(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 1P, 6A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4138
  • Mfr. Part No. 2CDS271001R0064 S201M-C6
Each
SGD34.67(exc. GST)
In Stock
Littelfuse 1.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 541-3013
  • Mfr. Part No. 031301.5MXP
Each (In a Pack of 10)
SGD1.413(exc. GST)
In Stock
Phoenix Contact 1 Phase Surge Protector, 40kA, 2500V (Volts), DIN Rail Mount
  • RS Stock No. 131-653
  • Mfr. Part No. 2910364
Each
SGD284.45(exc. GST)
In Stock
Eaton 100A Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8651
  • Mfr. Part No. 100NHG000B
Each
SGD16.00(exc. GST)
1
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