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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

191 / 999+
ABB SMISSLINE TP S400E MCB, 1P, 8A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 176-829
  • Mfr. Part No. 2CCS551001R0085 - S401EB8
Each
MYR130.64
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3346
  • Mfr. Part No. A9DV6640
Each
MYR1,471.29
Schurter PC Board Non Resettable Fuse, Radial 4A, 250V ac
  • RS Stock No. 284-5401
  • Mfr. Part No. 0034.6621
Each (In a Pack of 10)
MYR2.31
Better World
Schneider Electric Busbar Tap-Off Unit with Fuse Isolator, Canalis KS Series
  • RS Stock No. 211-0495
  • Mfr. Part No. KSB160SF4
Each
MYR5,090.60
Siemens 25A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6911
  • Mfr. Part No. 3NA6810-6
Each (In a Pack of 3)
MYR259.557
Bourns SMD Non Resettable Fuse 30A, 250V ac
  • RS Stock No. 187-8681
  • Mfr. Part No. SF-3812F3000T-2
Each (In a Pack of 10)
MYR16.048
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 250-159
  • Mfr. Part No. 3VA6580-6KT36-2AA0
Each
MYR44,051.90
Osram Surge Protector, 15A, 15kV, Screw Mount Mount
  • RS Stock No. 251-5283
  • Mfr. Part No. SPD-15-275-G2
Each
MYR79.05
ABB SMISSLINE TP S400M MCB, 2P, 20A Curve C, 12V AC, 12V DC, 15 kA Breaking Capacity
  • RS Stock No. 231-9561
  • Mfr. Part No. 2CCS571103R8204 S401M-C20NP
Each
MYR427.67
Eaton Moeller Thermal Magnetic Circuit Breaker - 3 Pole 440V ac Voltage Rating DIN Rail, 200A Current Rating
  • RS Stock No. 221-3489
  • Mfr. Part No. 269216 NZMB2-A200-NA
Each
MYR4,432.70
Eaton xEffect MCB, 2P, 4A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4661
  • Mfr. Part No. 239099 FAZ6-C4/2
Each
MYR395.46
Eaton 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 765-2939
  • Mfr. Part No. CH143DU
Each
MYR357.88
Lovato 1 Phase Surge Protector, 100kA
  • RS Stock No. 216-8288
  • Mfr. Part No. SA1B1NA320R
Each
MYR4,286.33
ABB System Pro M Compact S200M MCB, 3+N, 32A Curve D, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-652
  • Mfr. Part No. 2CDS273103R0321
Each
MYR4,455.12
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 3P, 20A Curve C, 400V AC
  • RS Stock No. 238-3372
  • Mfr. Part No. A9P24320
Each
MYR690.29
Siemens Sentron 5SJ6 MCB, 1P, 10A Curve B, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 521-4737
  • Mfr. Part No. 5SJ6110-6KS
Each
MYR91.50
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 100A, Fixed Mount
  • RS Stock No. 232-0260
  • Mfr. Part No. 1SDA067558R1 XT2S 160 TMA 100A FF
Each
MYR1,612.83
Eaton 40mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 851-1438
  • Mfr. Part No. S500-40-R
Each
MYR31.59
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
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 25 kA
  • RS Stock No. 210-1632
  • Mfr. Part No. 3VA1120-3EE46-0AA0
Each
MYR2,265.40
1
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