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

307 / 999+
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 25A, 2 Pole, 30mA
  • RS Stock No. 776-3682
  • Mfr. Part No. A9R31225
Each
MYR1,055.95
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 32A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-071
  • Mfr. Part No. 2CDS272061R0537
Each
MYR1,876.70
Temporarily out of stock
Better World
Schneider Electric MCCB 2P 5A, Clip-On
  • RS Stock No. 178-8000
  • Mfr. Part No. LV426850
Each
MYR701.19
In Stock
Schneider Electric Vigi IC60 RCCB, 40A, 3 Pole, 30mA, Type A-SI, 400V ac
  • RS Stock No. 276-1540
  • Mfr. Part No. A9Q31340
Each
MYR2,401.50
Temporarily out of stock
RS PRO 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 277-3925
Each (In a Pack of 5)
MYR3.628
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 10A Curve K, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 514-0131
  • Mfr. Part No. 2CDS251001R0427 S201-K10
Each
MYR110.26
Temporarily out of stock
Schneider Electric Resi9 R9PF MCB, 1P, 16A, 230V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8970
  • Mfr. Part No. R9PFD616
Each
MYR191.90
In Stock
TE Connectivity 30A Fuse Holder for 10 x 38mm Fuse, 3P, 600V
  • RS Stock No. 299-071
  • Mfr. Part No. 1SNF100027R0000
Each
MYR57.60
Limited stock
RS PRO F, T Fuse Kit
  • RS Stock No. 893-8543
Each
MYR869.45
In Stock
SIBA 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3330
  • Mfr. Part No. 70-007-65/10A
Each (In a Pack of 10)
MYR1.515
In Stock
Siemens Sentron 5SJ6 MCB, 2P, 10A Curve C, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 521-4478
  • Mfr. Part No. 5SJ6210-7KS
Each
MYR313.85
In Stock
Littelfuse SMD Non Resettable Fuse 7A, 125V ac/dc
  • RS Stock No. 541-3451
  • Mfr. Part No. 0451007.MRL
Each (In a Pack of 10)
MYR4.594
In Stock
Littelfuse SMD Non Resettable Fuse 5A, 125V ac/dc
  • RS Stock No. 541-3675
  • Mfr. Part No. 0452005.MRL
Each (In a Pack of 10)
MYR7.88
In Stock
Littelfuse SMD Non Resettable Fuse 3A, 125V ac
  • RS Stock No. 769-3731
  • Mfr. Part No. 0452003.NRL
Each (In a Pack of 10)
MYR8.841
In Stock
Mersen Surge Protector
  • RS Stock No. 179-3080
  • Mfr. Part No. 83020141 / STPT2-40K1000V-YPVM
Each
MYR1,424.57
Temporarily out of stock
ABB 250A Tag Fuse, NH1, 500V
  • RS Stock No. 250-4430
  • Mfr. Part No. 1SCA022697R7730
1 Box of 3
MYR467.40
Temporarily out of stock
Eaton 200A Bolted Tag Fuse, 415V ac, 92mm
  • RS Stock No. 181-8608
  • Mfr. Part No. 200MJ31-7
Each (In a Box of 10)
MYR313.941
Temporarily out of stock
Better World
Schneider Electric Cable Connection Kit for use with Compact Nsx 100 To 630
  • RS Stock No. 221-1172
  • Mfr. Part No. LV429272
Each
MYR607.98
In Stock
Littelfuse 0.75A Resettable Fuse, 60V
  • RS Stock No. 712-7480
  • Mfr. Part No. RKEF075
Each (In a Pack of 10)
MYR1.733
Temporarily out of stock
Siemens, SENTRON MCCB 3P 15A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-603
  • Mfr. Part No. 3VA5195-1MU31-0AA0
Each
MYR2,519.51
1
307
2329
Results per page

Related links