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

46580 Products showing for Fuses & Circuit Breakers

2 / 999+
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 50A Curve B, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7551
  • Mfr. Part No. 2CDS251001R0505 S201-B50
Each
MYR103.94
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 8A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7659
  • Mfr. Part No. 2CDS251001R0084 S201-C8
Each
MYR78.76
Temporarily out of stock
ABB RCBO, 16A Current Rating, 2P Poles, 300mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6881
  • Mfr. Part No. 2CSR255080R3165
Each
MYR644.88
Last RS stock
Eaton xEffect MCB, 2P, 6A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4719
  • Mfr. Part No. 239100 FAZ6-C6/2
Each
MYR365.00
Temporarily out of stock
Better World
Siemens RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6166
  • Mfr. Part No. 5SU1324-7FP10
Each
MYR1,416.43
In Stock
Legrand 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 400V ac
  • RS Stock No. 238-4861
  • Mfr. Part No. 0 058 24
Each
MYR115.25
Limited stock
Schurter 500mA F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3871
  • Mfr. Part No. 8020.5065
Each
MYR5.97
Temporarily out of stock
Better World
Siemens RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8763
  • Mfr. Part No. 5SU1354-7LB40
Each
MYR1,698.65
Temporarily out of stock
Eaton RCCB, 25A, 2 Pole, 30mA, Type G, 230V ac
  • RS Stock No. 227-0692
  • Mfr. Part No. 264992 PFGM-25/2/003-G
Each
MYR2,010.74
In Stock
ABB System Pro M Compact S200 MCB, 1P, 32A Curve B, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-6943
  • Mfr. Part No. 2CDS251001R0325 - S201B32
Each
MYR75.64
Temporarily out of stock
Siemens 32A Fuse Holder for 10 x 38mm Fuse, 2P, 690V
  • RS Stock No. 299-989
  • Mfr. Part No. 3NW7024
Each
MYR164.04
In Stock
Eaton 45A British Standard Fuse, FE, 690 V ac, 500V dc, 63.5mm
  • RS Stock No. 156-8951
  • Mfr. Part No. 45FE
Each
MYR120.23
In Stock
Eaton 100A NH Fuse, NH00, 690V ac
  • RS Stock No. 181-8544
  • Mfr. Part No. 100NHG00B-690
1 Box of 3
MYR99.24
In Stock
Eaton MEMShield MCB, 1P, 40A Curve C, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3039
  • Mfr. Part No. EMCH140 EMCH140
Each
MYR167.19
Temporarily out of stock
Eaton AFDD, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, AFDD+ Range
  • RS Stock No. 146-2816
  • Mfr. Part No. 187168 AFDD-10/2/B/003-A
Each
MYR1,244.72
In Stock
Better World
ABB System Pro M Compact S200M MCB, 1P, 2A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4100
  • Mfr. Part No. 2CDS271001R0024 S201M-C2
Each
MYR143.63
Limited stock
Eaton 400A NH Fuse, NH2, 500V
  • RS Stock No. 703-8759
  • Mfr. Part No. 400NHG2B
Each
MYR147.68
In Stock
Eaton 16A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 181-8563
  • Mfr. Part No. 16NZ01
Each (In a Box of 10)
MYR11.702
In Stock
Better World
Schneider Electric Acti9 Acti9 iDT40K MCB, 1+N, 10A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 238-3411
  • Mfr. Part No. A9P71610
Each
MYR170.35
Temporarily out of stock
Eaton 380 → 440V ac/dc Shunt Trip Shunt trip for use with N(S)1(-4) Series, NZM1(-4) Series
  • RS Stock No. 454-8225
  • Mfr. Part No. 259728 NZM1-XA380-440AC/DC
Each
MYR653.01
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