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

333 / 999+
In Stock
ABB F200 RCCB, 100A, 4 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 225-6136
  • Mfr. Part No. 2CSF204101R3900 F204 A-100/0,3
Each
MYR1,551.63
Temporarily out of stock
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-209
  • Mfr. Part No. 3VA6610-7JQ32-0AA0
Each
MYR56,490.72
Temporarily out of stock
ABB SU200 M MCB, 3P, 13A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-079
  • Mfr. Part No. 2CDS273337R0134
Each
MYR1,699.61
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 500mA Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 131-949
  • Mfr. Part No. 2CDS272001R0984 S202M-C0,5
Each
MYR387.84
In Stock
Schneider Electric Altivar Process Modular Busbar Kit, 380 → 480V
  • RS Stock No. 446-830
  • Mfr. Part No. VW3A98BBMDCG
Each
MYR1,524.49
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 25A 3VA2, 3 channels
  • RS Stock No. 157-183
  • Mfr. Part No. 3VA2125-8JP32-0AA0
Each
MYR9,129.23
Temporarily out of stock
Schneider Electric Adapter for use with Compact INS, Compact INV, ComPact NS630b → 1600 Circuit Breaker,
  • RS Stock No. 247-1853
  • Mfr. Part No. 33644
Each
MYR1,847.59
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 3P, 20A Curve B, 6 kA Breaking Capacity
  • RS Stock No. 202-7096
  • Mfr. Part No. 5SL6320-6
Each
MYR383.77
In Stock
Siemens SIRIUS 3 Phase Busbar Protector, 690V
  • RS Stock No. 755-2971
  • Mfr. Part No. 3RV2925-5EB
Each
MYR162.20
In Stock
Eaton xPole MCB, 2P, 20A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4361
  • Mfr. Part No. 242406 PLSM-C20/2-MW
Each
MYR399.37
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IUGN66 2 Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0289
  • Mfr. Part No. IUGN66-1-61-10.0
Each
MYR634.05
Temporarily out of stock
Littelfuse 1.6A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 878-1372
  • Mfr. Part No. 021501.6HXP
Each (In a Pack of 100)
MYR4.465
Temporarily out of stock
Siemens SENTRON Locking Kit
  • RS Stock No. 277-0863
  • Mfr. Part No. 3WA9111-0BA75
Each
MYR2,639.99
In Stock
Eaton xEffect MCB, 2P, 13A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3493
  • Mfr. Part No. 278781 FAZ-D13/2
Each
MYR392.00
Temporarily out of stock
Schneider Electric RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 341-549
  • Mfr. Part No. A9D27220
Each
MYR5,319.36
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 1A Curve K
  • RS Stock No. 237-3273
  • Mfr. Part No. 2CDS253103R0217
Each
MYR1,029.74
In Stock
Siemens 250A NH Fuse, NH1, 500V ac
  • RS Stock No. 397-565
  • Mfr. Part No. 3NA3144
Each (In a Pack of 3)
MYR52.40
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 8A, Type Z
  • RS Stock No. 237-3289
  • Mfr. Part No. 2CDS253103R0408
Each
MYR1,090.50
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 2P, 32A Curve B, 400V AC, 72V DC
  • RS Stock No. 212-8934
  • Mfr. Part No. 5SL6232-6
Each
MYR294.98
Temporarily out of stock
Contactum 8 Way Steel Consumer Unit, 100A Defender
  • RS Stock No. 184-9123
  • Mfr. Part No. DDS08188MS-P01
Each
MYR1,142.47
1
333
2329
Results per page

Related links