Circuit Protection & Breakers


Circuit Protection & Breakers

All the industrial electrical equipment are exposed to damage and malfunction, and there is always a risk that someone may connect a device incorrectly or use it for the wrong applications. To ensure safety of any industrial installation it’s very critical to meet national codes and protect equipment and processes from excess energy that could cause damage or safety issues to prevent costly downtime.


As a part of system design and installation process, the electrical engineering team specifies the required circuit breakers and supplemental protectors - A device which can break the circuit.


Circuit Breakers

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current. Its basic function is to interrupt current flow after a fault (overload or fault current) is detected. Circuit breakers are made in varying sizes, from small devices that protect low-current circuits or individual household appliance, up to large switchgear designed to protect high voltage circuits. The function of a circuit breaker, RCD or a fuse is often abbreviated as Automatic Disconnection of Supply.


Line protection

Line protection is used whenever high-speed protection is required for all types of short circuits and for any fault location. For two-terminal lines, and for many multi-terminal lines, all the terminal breakers are tripped practically simultaneously, thereby permitting high-speed automatic reclosing. Pilot relaying is the best type for line protection.


Fuse

A fuse is an electrical safety device that operates to protect over current of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby interrupting the current. Once a fuse has operated it is an open circuit, and it must be replaced or rewired, depending on type.


Return to main Industrial Automation Control page

Videos

Ben Heck's Essentials Series 3: Circuit Protection at Eaton

Engineer It: How to Design Protection Circuits for Analog I/O Modules

Optimum protection against overload and short-circuit - PHOENIX CONTACT

Featured Products

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Thermal Magnetic Circuit Breaker, iC60H Series from Schneider

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Multi channel electronic device circuit breaker from Phoenix Contact

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Miniature Circuit Breaker from ABB

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PCB Mount Fuse Holders from Multicomp

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Contract pricing display is unavailable at the moment. Prices shown are standard retail prices, orders placed will have contract pricing applied when processed.

  Manufacturer Part No Order Code Manufacturer / Description
Availability Price For
Price
Quantity
106-P30 2A
106-P30 2A - Thermal Circuit Breaker, 106-P30 Series, 2 A, 1 Pole, 48 VDC, 250 VAC, Panel

143571

Thermal Circuit Breaker, 106-P30 Series, 2 A, 1 Pole, 48 VDC, 250 VAC, Panel

ETA

CIRCUIT BREAKER, 2A; Product Range:106-P30 Series; Current Rating:2A; No. of Poles:1 Pole; Voltage Rating V DC:48VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (15-Jan-2018); Approval Bodies:CSA, EN, NEMKO, OVE, SEMKO, SEV,

  • 23 available for 1 - 2 business days delivery
  • 176 available for 3 - 4 business days delivery
+ Check Stock & Lead Times

  • 23 available for 1 - 2 business days delivery: (SG stock) Order before 4:30pm Mon – Fri. (Excluding National Holidays)
  • 176 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

More stock available week commencing 14/12/20

Restricted Item
1410-L210-L2F1-S02-1.5A
1410-L210-L2F1-S02-1.5A - Thermal Circuit Breaker, 1410 Series, 1.5 A, 1 Pole, 28 VDC, 250 VAC, PCB Through Hole

237395

Thermal Circuit Breaker, 1410 Series, 1.5 A, 1 Pole, 28 VDC, 250 VAC, PCB Through Hole

ETA

CIRCUIT BREAKER, 1.5A; Product Range:1410 Series; Current Rating:1.5A; No. of Poles:1 Pole; Voltage Rating V DC:28VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:PCB Through Hole; SVHC:No SVHC (15-Jan-2018); Approval Bodies:CSA, EN, UL, VDE; Bre

  • 249 available for 1 - 2 business days delivery
+ Check Stock & Lead Times

  • 249 available for 1 - 2 business days delivery: (SG stock) Order before 4:30pm Mon – Fri. (Excluding National Holidays)

More stock available week commencing 21/12/20

Restricted Item
W28-XQ1A-12
W28-XQ1A-12 - Thermal Circuit Breaker, W28 Series, 12 A, 1 Pole, 32 VDC, 250 VAC, Panel

2395826

Thermal Circuit Breaker, W28 Series, 12 A, 1 Pole, 32 VDC, 250 VAC, Panel

POTTER&BRUMFIELD - TE CONNECTIVITY

CIRCUIT BREAKER, THERMAL, 1P, 250V, 12A; Product Range:W28 Series; Current Rating:12A; No. of Poles:1 Pole; Voltage Rating V DC:32VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (27-Jun-2018)

  • 160 available for 3 - 4 business days delivery
+ Check Stock & Lead Times

  • 160 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

More stock available week commencing 15/02/21

Restricted Item
W31-X2M1G-50
W31-X2M1G-50 - Thermal Circuit Breaker, W31 Series, 50 A, 1 Pole, 50 VDC, 250 VAC, Panel

1651005

Thermal Circuit Breaker, W31 Series, 50 A, 1 Pole, 50 VDC, 250 VAC, Panel

POTTER&BRUMFIELD - TE CONNECTIVITY

THERMAL CIRCUIT BREAKER; Product Range:W31 Series; Current Rating:50A; No. of Poles:1 Pole; Voltage Rating V DC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel

  • 163 available for 3 - 4 business days delivery
+ Check Stock & Lead Times

  • 163 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

  • 54 more will be available on 8/11/20
  • 185 more will be available on 3/11/20
  • 182 more will be available on 7/11/20
  • 185 more will be available on 12/12/20
  • 185 more will be available on 16/03/21
  • More stock available week commencing 3/05/21

    Restricted Item
    106-P30 5A
    106-P30 5A - Thermal Circuit Breaker, 106 Series, 5 A, 1 Pole, 48 VDC, 240 VAC, Panel

    143828

    Thermal Circuit Breaker, 106 Series, 5 A, 1 Pole, 48 VDC, 240 VAC, Panel

    ETA

    CIRCUIT BREAKER, 5A; Product Range:106 Series; Current Rating:5A; No. of Poles:1 Pole; Voltage Rating V DC:48VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (15-Jan-2018); Approval Bodies:CSA, EN, NEMKO, OVE, SEMKO, SEV, VDE;

    • 55 available for 3 - 4 business days delivery
    + Check Stock & Lead Times

    • 55 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

    More stock available week commencing 14/12/20

    Restricted Item
    106-P30 6A
    106-P30 6A - Thermal Circuit Breaker, 106 Series, 6 A, 1 Pole, 48 VDC, 240 VAC, Panel

    178740

    Thermal Circuit Breaker, 106 Series, 6 A, 1 Pole, 48 VDC, 240 VAC, Panel

    ETA

    CIRCUIT BREAKER, 6A; Product Range:106 Series; Current Rating:6A; No. of Poles:1 Pole; Voltage Rating V DC:48VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (15-Jan-2018); Approval Bodies:CSA, EN, NEMKO, OVE, SEMKO, SEV, VDE;

    • 50 available for 3 - 4 business days delivery
    + Check Stock & Lead Times

    • 50 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

  • 30 more will be available on 1/11/20
  • More stock available week commencing 14/12/20

    Restricted Item
    W58-XB1A4A-5
    W58-XB1A4A-5 - Thermal Circuit Breaker, Push Reset, W58 Series, 5 A, 1 Pole, 50 VDC, 250 VAC, Panel

    1436205

    Thermal Circuit Breaker, Push Reset, W58 Series, 5 A, 1 Pole, 50 VDC, 250 VAC, Panel

    POTTER&BRUMFIELD - TE CONNECTIVITY

    CIRCUIT BREAKER, THERMAL, 1P, 250V, 5A;; Product Range:W58 Series; Current Rating:5A; No. of Poles:1 Pole; Voltage Rating V DC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (15-Jan-2018); Approval Bodies:CSA; Approval Cat

    • 463 available for 3 - 4 business days delivery
    • 2,498 available for 4 - 5 business days delivery
    + Check Stock & Lead Times

    • 463 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)
    • 2,498 available for 4 - 5 business days delivery: (US stock) Order before 6:00pm Mon – Fri. (Excluding National Holidays)

  • 1,200 more will be available on 6/11/20
  • 1,200 more will be available on 9/11/20
  • 1,013 more will be available on 16/11/20
  • 1,180 more will be available on 26/12/20
  • More stock available week commencing 25/01/21

    Restricted Item
    4400.0017
    4400.0017 - Thermal Circuit Breaker, 16 A, 1 Pole, 48 VDC, 240 VAC, Panel

    1214772

    Thermal Circuit Breaker, 16 A, 1 Pole, 48 VDC, 240 VAC, Panel

    SCHURTER

    CIRCUIT BREAKER, 16A, T11; Product Range:-; Current Rating:16A; No. of Poles:1 Pole; Voltage Rating V DC:48VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (27-Jun-2018); External Depth:50.2mm; External Length / Height:19mm; E

    • 26 available for 3 - 4 business days delivery
    + Check Stock & Lead Times

    • 26 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

  • 20 more will be available on 1/11/20
  • More stock available week commencing 18/01/21

    Restricted Item
    4404.0062
    4404.0062 - Thermal Circuit Breaker, T9-611 Series, 16 A, 1 Pole, 48 VDC, 240 VAC, Panel

    1637523

    Thermal Circuit Breaker, T9-611 Series, 16 A, 1 Pole, 48 VDC, 240 VAC, Panel

    SCHURTER

    CIRCUIT BREAKER, T9 UE AC240V; Product Range:T9-611 Series; Current Rating:16A; No. of Poles:1 Pole; Voltage Rating V DC:48VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (27-Jun-2018); Approval Bodies:CCC, VDE; Approval Cate

    • 135 available for 3 - 4 business days delivery
    + Check Stock & Lead Times

    • 135 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

    More stock available week commencing 29/03/21

    Restricted Item
    TA35-CBTWF100C0
    TA35-CBTWF100C0 - Thermal Circuit Breaker, TA35 Series, 10 A, 2 Pole, 32 VDC, 240 VAC, Panel

    1637609

    Thermal Circuit Breaker, TA35 Series, 10 A, 2 Pole, 32 VDC, 240 VAC, Panel

    SCHURTER

    CIRCUIT BREAKER, 2P, 10A; Product Range:TA35 Series; Current Rating:10A; No. of Poles:2 Pole; Voltage Rating V DC:32VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (27-Jun-2018); Approval Bodies:CCC, VDE; Approval Category:UL

    • 90 available for 3 - 4 business days delivery
    + Check Stock & Lead Times

    • 90 available for 3 - 4 business days delivery: (UK stock) Order before 7:35pm Mon – Fri. (Excluding National Holidays)

    More stock available week commencing 18/01/21

    Restricted Item
    106-P30 1A
    106-P30 1A - Thermal Circuit Breaker, 106-P30 Series, 1 A, 1 Pole, 48 VDC, 240 VAC, Panel

    143570

    Thermal Circuit Breaker, 106-P30 Series, 1 A, 1 Pole, 48 VDC, 240 VAC, Panel

    ETA

    CIRCUIT BREAKER, 1A; Product Range:106-P30 Series; Current Rating:1A; No. of Poles:1 Pole; Voltage Rating V DC:48VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (15-Jan-2018); External Depth:27.6mm; External Length / Height:1

    Available for back order

    + Check Stock & Lead Times
  • 36 more will be available on 1/11/20
  • More stock available week commencing 14/12/20 Contact me when back in stock

    Restricted Item
    1110-F112-P1M1-3A
    1110-F112-P1M1-3A - Thermal Circuit Breaker, 1110 Series, 3 A, 1 Pole, 50 VDC, 250 VAC, Panel

    1003731

    Thermal Circuit Breaker, 1110 Series, 3 A, 1 Pole, 50 VDC, 250 VAC, Panel

    ETA

    CIRCUIT BREAKER, 3A, 250VAC, 50VDC; Product Range:1110 Series; Current Rating:3A; No. of Poles:1 Pole; Voltage Rating V DC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; SVHC:No SVHC (15-Jan-2018); Single Flat Panel Cut-out Diameter:13

    Available for back order

    + Check Stock & Lead Times

    More stock available week commencing 14/12/20 Contact me when back in stock

    Restricted Item
    5544S
    5544S - Circuit Breaker Accessory, Miniature Circuit Breaker, Blanking Plate, SENTRY Series

    261531

    Circuit Breaker Accessory, Miniature Circuit Breaker, Blanking Plate, SENTRY Series

    MK

    BLANKING PLATE, MCB; For Use With:Miniature Circuit Breaker; Accessory Type:Blanking Plate; Product Range:SENTRY Series; SVHC:No SVHC (07-Jul-2017); Circuit Breaker Mounting:DIN Rail

    Available for back order

    + Check Stock & Lead Times

    More stock available week commencing 21/12/20 Contact me when back in stock

    Restricted Item