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

251 / 999+
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 50 kA, DIN Rail Mount
  • RS Stock No. 178-7988
  • Mfr. Part No. LV426787
Each
MYR5,714.55
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-248
  • Mfr. Part No. 3VA6210-7KQ31-2AA0
Each
MYR21,129.70
In Stock
Schneider Electric RCBO, 20A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 245-138
  • Mfr. Part No. A9D05820
Each
MYR988.53
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 50A Curve C, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-825
  • Mfr. Part No. 2CDS271061R0504
Each
MYR686.63
In Stock
Eaton 2A Grey Blade Car Fuse, 32V dc
  • RS Stock No. 849-5620
  • Mfr. Part No. ATC-2
Each
MYR7.08
In Stock
Better World
Siemens Sentron 5SY6 MCB, 2P, 2A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3625
  • Mfr. Part No. 5SY6202-7
Each
MYR353.89
In Stock
ABB Tmax XT Cover for use with Tmax XT
  • RS Stock No. 232-0209
  • Mfr. Part No. 1SDA066670R1 HTC XT4 TER 2pcs
Each
MYR137.35
In Stock
RS PRO 15A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V
  • RS Stock No. 237-5266
Each
MYR17.88
In Stock
ABB Switch Disconnector Circuit Trip for use with Commanding Load
  • RS Stock No. 231-9590
  • Mfr. Part No. 2CDE282001R0100 E202/100r
1 Box of 1
MYR244.43
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 200A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 230-875
  • Mfr. Part No. 113228 NZMC2-S200-SVE
Each
MYR6,925.55
Temporarily out of stock
Hager BDF RCCB, 25A, 3 Pole, 30mA, Type F
  • RS Stock No. 602-169
  • Mfr. Part No. BDF325
Each
MYR2,451.60
Temporarily out of stock
ABB RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6866
  • Mfr. Part No. 2CSR275080R1254
Each
MYR953.67
In Stock
Schurter 1.25A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 777-7463
  • Mfr. Part No. 0034.3118
Each (In a Pack of 10)
MYR1.777
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3684
  • Mfr. Part No. 1SDA071657R1
Each
MYR67,464.47
Temporarily out of stock
ABB F200 RCCB, 40A, 4 Pole, 100mA, Type AC, 230V ac
  • RS Stock No. 225-6119
  • Mfr. Part No. 2CSF204001R2400 F204 AC-40/0,1
Each
MYR902.98
In Stock
RS PRO 315mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9614
Each (In a Pack of 10)
MYR1.989
In Stock
Better World
Schneider Electric 48V ac/dc Undervoltage Release Circuit Trip for use with ARA, ic60 MCB, IDPN Vigi, iSW-NA, RCA,
  • RS Stock No. 211-2269
  • Mfr. Part No. A9A26961
Each
MYR606.11
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 16A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9150
  • Mfr. Part No. A9F77316
Each
MYR974.83
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7769
  • Mfr. Part No. C16F4TM160D1
Each
MYR9,306.13
Temporarily out of stock
Eaton 63A NH Fuse, 63 x 40 x 150mm, 500V ac
  • RS Stock No. 262-552
  • Mfr. Part No. 63NHG02BI NH FUSE 63A 500V GL/GG SIZE 02
1 Pack of 3
MYR175.58
1
251
2329
Results per page

Related links