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

43 of 999+
Temporarily out of stock
Wickmann 4A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0250
  • Mfr. Part No. 0313004.MXP
1 Box of 1000
MYR4,389.00(exc. VAT)
In Stock
Mersen 3A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0566
  • Mfr. Part No. V1014571 / FR10GR69V3
Each
MYR46.33(exc. VAT)
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 320A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 232-0083
  • Mfr. Part No. 1SDA054117R1 T4N320 FF PR221-LS 320A
Each
MYR6,949.99(exc. VAT)
In Stock
Littelfuse 1A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 769-3757
  • Mfr. Part No. 0FLQ001.T
Each
MYR170.45(exc. VAT)
In Stock
Better World
Schneider Electric Acti9 iIDK RCCB, 40A, 2 Pole, 30mA, Type AC, 220 → 240V ac
  • RS Stock No. 238-3455
  • Mfr. Part No. A9R55240
Each
MYR658.39(exc. VAT)
In Stock
Mersen 63A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7454
  • Mfr. Part No. Y215646
Each (In a Pack of 10)
MYR27.002(exc. VAT)
In Stock
ABB Connecting Terminals for use with DS941, DS951, SN201
  • RS Stock No. 231-9916
  • Mfr. Part No. 2CSL980001R2515 FEED-IN 25/15 1P
Each
MYR21.25(exc. VAT)
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P+N 320A, Fixed Mount
  • RS Stock No. 250-4174
  • Mfr. Part No. 1SDA054446R1
Each
MYR20,821.72(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 63A Curve C, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2371
  • Mfr. Part No. M9F22263
Each
MYR264.55(exc. VAT)
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 5A Current Rating
  • RS Stock No. 217-6380
  • Mfr. Part No. 2800895
Each
MYR471.41(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 1.5A, 125V ac/dc
  • RS Stock No. 541-3394
  • Mfr. Part No. 045101.5MRL
Each (In a Pack of 10)
MYR5.92(exc. VAT)
Limited stock
RS PRO BS 1362, F, T Fuse Kit
  • RS Stock No. 893-8546
Each
MYR417.14(exc. VAT)
In Stock
Eaton 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1161
  • Mfr. Part No. S500-2.5-R
Each (In a Pack of 10)
MYR0.802(exc. VAT)
In Stock
ABB Tmax XT Padlock Device for use with Tmax XT
  • RS Stock No. 237-6097
  • Mfr. Part No. 1SDA066590R1 PLL XT2-XT4
Each
MYR187.08(exc. VAT)
Temporarily out of stock
Mersen 40A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7482
  • Mfr. Part No. N213613
Each (In a Pack of 10)
MYR26.746(exc. VAT)
In Stock
Siemens 10A DII Diazed Fuse, E16 Thread Size, gG, 500V ac
  • RS Stock No. 395-765
  • Mfr. Part No. 5SA251
Each (In a Pack of 10)
MYR28.307(exc. VAT)
Temporarily out of stock
35A Cartridge Fuse, 21 x 87mm
  • RS Stock No. 262-966
  • Mfr. Part No. BAO35
1 Pack of 20
MYR2,430.55(exc. VAT)
In Stock
Eaton xPole MCB, 1P, 20A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4320
  • Mfr. Part No. 242207 PLSM-C20-MW
Each
MYR133.79(exc. VAT)
In Stock
Schneider Electric Acti9 A9F MCB Mini Circuit Breaker, 2P, 16A Curve C, 500V AC, 10 kA Breaking Capacity
  • RS Stock No. 653-861
  • Mfr. Part No. A9F74216
Each
MYR445.72(exc. VAT)
Limited stock
ETI 2A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-935
  • Mfr. Part No. 2211001
Each (In a Pack of 5)
MYR4.822(exc. VAT)
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