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

46578 Products showing for Fuses & Circuit Breakers

146 / 999+
In Stock
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 100mA, Type A, 400V ac
  • RS Stock No. 209-6574
  • Mfr. Part No. 5SV3446-6
Each
MYR1,425.48
Temporarily out of stock
RS PRO HBC, LBC Fuse Kit
  • RS Stock No. 420-268
1 Kit
MYR405.59
Temporarily out of stock
Better World
ABB, XT4N MCCB 4P 250A, Fixed Mount
  • RS Stock No. 236-6617
  • Mfr. Part No. 1SDA068152R1 XT4N 250 Ekip I 250A FF
Each
MYR6,729.37
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 80A, Fixed Mount
  • RS Stock No. 254-6323
  • Mfr. Part No. C11N3TM080L
Each
MYR2,768.04
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 80A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7827
  • Mfr. Part No. LV426576
Each
MYR3,564.49
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 80A, Fixed Mount
  • RS Stock No. 254-6315
  • Mfr. Part No. C11F3TM080L
Each
MYR2,463.27
In Stock
Bulgin 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 376-6602
  • Mfr. Part No. FX0369/2
Each (In a Pack of 5)
MYR19.266
Temporarily out of stock
Siemens SENTRON Door Sealing Frame
  • RS Stock No. 277-0796
  • Mfr. Part No. 3WA9111-0AP01
Each
MYR1,175.31
Temporarily out of stock
Eaton 16A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8532
  • Mfr. Part No. ESD16
1 Box of 20
MYR501.62
Temporarily out of stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 500mA Curve C, 250V DC, 20 kA Breaking Capacity
  • RS Stock No. 776-3152
  • Mfr. Part No. A9N61500
Each
MYR345.19
Temporarily out of stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 63A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 746-8175
  • Mfr. Part No. 2CDS272001R0631 S202M-D63
Each
MYR373.91
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 250V ac Voltage Rating DIN Rail, 8A Current Rating
  • RS Stock No. 135-495
  • Mfr. Part No. 0914691
1 Pack of 6
MYR2,201.42
New product - Preorder today
Schneider Electric R9R RCCB, 63A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 654-678
  • Mfr. Part No. R9R22463
Each
MYR2,155.53
Temporarily out of stock
Better World
Schneider Electric 12A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 219-9047
  • Mfr. Part No. DF2CA12
Each (In a Pack of 10)
MYR51.026
In Stock
Schneider Electric Multi9 M9F1 MCB, 2P, 1A Curve C, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-123
  • Mfr. Part No. M9F11201
Each
MYR551.36
Temporarily out of stock
RS PRO Industrial Surge Protector, 2000A, 70 V, DIN Rail Mount
  • RS Stock No. 101-782
Each
MYR440.70
In Stock
RS PRO MCB, 3P, 10A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0205
Each
MYR160.24
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 3A Curve K, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7946
  • Mfr. Part No. 2CDS251001R0317 S201-K3
Each
MYR179.89
Temporarily out of stock
Schneider Electric A9R3 RCCB, 40A, 2 Pole, 30mA, Type A-SI, 240V ac
  • RS Stock No. 276-8738
  • Mfr. Part No. A9R31240
Each
MYR1,239.45
Temporarily out of stock
SENTRON for use with 3VA52, 3VA61/62 Series
  • RS Stock No. 263-808
  • Mfr. Part No. 3VA9277-0CB10
Each
MYR1,428.56
1
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