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

None

Electronics Circuit Protector, 24V, 1A

Shop Now
None

Thermal Magnetic Circuit Breaker, iC60H Series,

Shop Now
None

Multi 9 Thermal Magnetic Circuit Breakers

Shop Now
None

Panel Mount Fuse Holders

Shop Now
Compare Selected Compare Add Selected Add

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 Newark Part No. Manufacturer / Description
Availability Price for:
Price
Quantity
W23-X1A1G-10
W23-X1A1G-10 - Thermal Circuit Breaker, W23 Series, 10 A, 1 Pole, 50 VDC, 240 VAC, Panel

17M3339

Thermal Circuit Breaker, W23 Series, 10 A, 1 Pole, 50 VDC, 240 VAC, Panel

POTTER&BRUMFIELD - TE CONNECTIVITY

CIRCUIT BREAKER, THERMAL, 1P, 250V, 10A; Product Range:W23 Series; Current Rating:10A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel RoHS Compliant: Yes

569 in stock

+ Check Stock & Lead Times

569 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

More stock available week commencing 28/12/20

Restricted Item
W23-X1A1G-50
W23-X1A1G-50 - Thermal Circuit Breaker, W23 Series, 50 A, 1 Pole, 50 VDC, 240 VAC, Panel

17M3340

Thermal Circuit Breaker, W23 Series, 50 A, 1 Pole, 50 VDC, 240 VAC, Panel

POTTER&BRUMFIELD - TE CONNECTIVITY

CIRCUIT BREAKER, THERMAL, 1P, 250V, 50A; Product Range:W23 Series; Current Rating:50A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; Operating Voltage:250V; Voltage AC:250V RoHS Compliant: Yes

339 in stock

+ Check Stock & Lead Times

339 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

More stock available week commencing 21/12/20

Restricted Item
W31-X2M1G-10
W31-X2M1G-10 - Thermal Circuit Breaker, W31 Series, 10 A, 1 Pole, 50 VDC, 240 VAC, Panel

17M3341

Thermal Circuit Breaker, W31 Series, 10 A, 1 Pole, 50 VDC, 240 VAC, Panel

POTTER&BRUMFIELD - TE CONNECTIVITY

CIRCUIT BREAKER, THERMAL, 1P, 240V, 10A; Product Range:W31 Series; Current Rating:10A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; Operating Voltage:250V RoHS Compliant: Yes

255 in stock

+ Check Stock & Lead Times

255 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

More stock available week commencing 28/12/20

Restricted Item
W31-X2M1G-5
W31-X2M1G-5 - Thermal Circuit Breaker, W31 Series, 5 A, 1 Pole, 50 VDC, 250 VAC, Panel

18M9759

Thermal Circuit Breaker, W31 Series, 5 A, 1 Pole, 50 VDC, 250 VAC, Panel

POTTER&BRUMFIELD - TE CONNECTIVITY

CIRCUIT BREAKER, THERMAL, 1P, 250V, 5A; Product Range:W31 Series; Current Rating:5A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; Operating Voltage:250V RoHS Compliant: Yes

253 in stock

+ Check Stock & Lead Times

253 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

More stock available week commencing 21/12/20

Restricted Item
W31-X2M1G-20
W31-X2M1G-20 - Thermal Circuit Breaker, W31 Series, 20 A, 1 Pole, 50 VDC, 250 VAC, Panel

18M9758

Thermal Circuit Breaker, W31 Series, 20 A, 1 Pole, 50 VDC, 250 VAC, Panel

POTTER&BRUMFIELD - TE CONNECTIVITY

CIRCUIT BREAKER, THERMAL, 1P, 250V, 20A; Product Range:W31 Series; Current Rating:20A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; Operating Voltage:250V RoHS Compliant: Yes

205 in stock

+ Check Stock & Lead Times

205 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

More stock available week commencing 21/12/20

Restricted Item
KD1-2
KD1-2 - Thermal Circuit Breaker, KD Series, 2 A, 1 Pole, 50 VDC, 250 VAC, Panel

29F1602

Thermal Circuit Breaker, KD Series, 2 A, 1 Pole, 50 VDC, 250 VAC, Panel

EATON HEINEMANN

CIRCUIT BREAKER, THERMAL, 1P, 250V, 2A; Product Range:KD Series; Current Rating:2A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; Operating Voltage:250V; Voltage AC:250V RoHS Compliant: Yes

400 in stock

+ Check Stock & Lead Times

400 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

  • 200 more will be available on 05/10/20
  • More stock available week commencing 09/11/20

    Restricted Item
    KD1-1
    KD1-1 - Thermal Circuit Breaker, KD Series, 1 A, 1 Pole, 50 VDC, 250 VAC, Panel

    29F1601

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

    EATON HEINEMANN

    CIRCUIT BREAKER, THERMAL, 1P, 250V, 1A; Product Range:KD Series; Current Rating:1A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel RoHS Compliant: Yes

    248 in stock

    + Check Stock & Lead Times

    248 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 09/11/20

    Restricted Item
    T9-611P-5A
    T9-611P-5A - Thermal Circuit Breaker, T9-611 Series, 5 A, 1 Pole, 48 VDC, 240 VAC, Panel

    28K1540

    Thermal Circuit Breaker, T9-611 Series, 5 A, 1 Pole, 48 VDC, 240 VAC, Panel

    SCHURTER

    CIRCUIT BREAKER, THERMAL, 1P, 240V, 5A; Product Range:T9-611 Series; Current Rating:5A; No. of Poles:1 Pole; Voltage Rating VDC:48VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; Voltage AC:240V RoHS Compliant: Yes

    1,356 in stock

    + Check Stock & Lead Times

    1,356 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 21/12/20

    Restricted Item
    TA35-CFTWF030C0
    TA35-CFTWF030C0 - Thermal Circuit Breaker, TA35 Series, 3 A, 1 Pole, 32 VDC, 240 VAC, Panel

    35M4248

    Thermal Circuit Breaker, TA35 Series, 3 A, 1 Pole, 32 VDC, 240 VAC, Panel

    SCHURTER

    CIRCUIT BREAKER, THERMAL, 1P, 240V, 3A; Product Range:TA35 Series; Current Rating:3A; No. of Poles:1 Pole; Voltage Rating VDC:32VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; Voltage AC:240V RoHS Compliant: Yes

    263 in stock

    + Check Stock & Lead Times

    263 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 07/12/20

    Restricted Item
    W67-X2Q12-15
    W67-X2Q12-15 - Magnetic Hydraulic Circuit Breaker, W6 Series, 15 A, 1 Pole, 277 V, 5 kA, 20 s

    19M4742

    Magnetic Hydraulic Circuit Breaker, W6 Series, 15 A, 1 Pole, 277 V, 5 kA, 20 s

    POTTER&BRUMFIELD - TE CONNECTIVITY

    CIRCUIT BREAKER, HYDROMAGNETIC, 1P, 277V, 15A; Product Range:W6 Series; Current Rating:15A; No. of Poles:1 Pole; Input Voltage VAC:277V; Interrupting Capacity:5kA; Trip Time:20s; Dielectric Strength:1.5kV; Operating Voltage:277VAC RoHS Compliant: Yes

    41 in stock

    + Check Stock & Lead Times

    41 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

  • 144 more will be available on 04/04/21
  • More stock available week commencing 12/04/21

    Restricted Item
    AF2-B0-46-620-212-D
    AF2-B0-46-620-212-D - Magnetic Hydraulic Circuit Breaker, A Series, 20 A, 2 Pole, 277 V

    01E9215

    Magnetic Hydraulic Circuit Breaker, A Series, 20 A, 2 Pole, 277 V

    CARLING TECHNOLOGIES

    CIRCUIT BREAKER, 2 POLE, 277VAC, 20A; Product Range:A Series; Current Rating:20A; No. of Poles:2 Pole; Input Voltage VAC:277V; Interrupting Capacity:-; Trip Time:-; Dielectric Strength:1.5kV RoHS Compliant: Yes

    535 in stock

    + Check Stock & Lead Times

    535 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 23/11/20

    Restricted Item
    W28-XT1A-3
    W28-XT1A-3 - Thermal Circuit Breaker, W28 Series, 3 A, 1 Pole, 32 VDC, 250 VAC, Panel

    34C4550

    Thermal Circuit Breaker, W28 Series, 3 A, 1 Pole, 32 VDC, 250 VAC, Panel

    POTTER&BRUMFIELD - TE CONNECTIVITY

    CIRCUIT BREAKER, THERMAL, 1P, 250V, 3A; Product Range:W28 Series; Current Rating:3A; No. of Poles:1 Pole; Voltage Rating VDC:32VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel RoHS Compliant: Yes

    203 in stock

    + Check Stock & Lead Times

    203 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 21/12/20

    Restricted Item
    T9-611P-16A
    T9-611P-16A - Thermal Circuit Breaker, T9-611 Series, 16 A, 1 Pole, 32 VDC, 240 VAC, Panel

    28K1539

    Thermal Circuit Breaker, T9-611 Series, 16 A, 1 Pole, 32 VDC, 240 VAC, Panel

    SCHURTER

    CIRCUIT BREAKER, THERMAL, 1P, 240V, 16A; Product Range:T9-611 Series; Current Rating:16A; No. of Poles:1 Pole; Voltage Rating VDC:32VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel RoHS Compliant: Yes

    707 in stock

    + Check Stock & Lead Times

    707 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 21/12/20

    Restricted Item
    W58-XC4C12A-25
    W58-XC4C12A-25 - Thermal Circuit Breaker, W58 Series, 25 A, 1 Pole, 50 VDC, 250 VAC, Panel

    29M9967

    Thermal Circuit Breaker, W58 Series, 25 A, 1 Pole, 50 VDC, 250 VAC, Panel

    POTTER&BRUMFIELD - TE CONNECTIVITY

    CIRCUIT BREAKER, THERMAL, 1P, 250V, 25A; Product Range:W58 Series; Current Rating:25A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; Operating Voltage:250V RoHS Compliant: Yes

    386 in stock

    + Check Stock & Lead Times

    386 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 04/01/21

    Restricted Item
    W51-A121B1-10
    W51-A121B1-10 - Thermal Circuit Breaker, W51 Series, 10 A, 1 Pole, 50 VDC, 125 VAC, Panel

    08H0784

    Thermal Circuit Breaker, W51 Series, 10 A, 1 Pole, 50 VDC, 125 VAC, Panel

    POTTER&BRUMFIELD - TE CONNECTIVITY

    CIRCUIT BREAKER, THERMAL, 1P, 125V, 10A; Product Range:W51 Series; Current Rating:10A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:125VAC; Circuit Breaker Mounting:Panel; Operating Voltage:125V; Voltage AC:125V RoHS Compliant: Yes

    335 in stock

    + Check Stock & Lead Times

    335 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 04/01/21

    Restricted Item
    W51-A122B1-10
    W51-A122B1-10 - Thermal Circuit Breaker, W51 Series, 10 A, 1 Pole, 50 VDC, 250 VAC, Panel

    08H0788

    Thermal Circuit Breaker, W51 Series, 10 A, 1 Pole, 50 VDC, 250 VAC, Panel

    POTTER&BRUMFIELD - TE CONNECTIVITY

    CIRCUIT BREAKER, THERMAL, 1P, 250V, 10A; Product Range:W51 Series; Current Rating:10A; No. of Poles:1 Pole; Voltage Rating VDC:50VDC; Voltage Rating VAC:250VAC; Circuit Breaker Mounting:Panel; Operating Voltage:250V; Voltage AC:250V RoHS Compliant: Yes

    93 in stock

    + Check Stock & Lead Times

    93 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 04/01/21

    Restricted Item
    T11-311-2
    T11-311-2 - Thermal Circuit Breaker, T11 Series, 2 A, 1 Pole, 48 VDC, 240 VAC, Panel

    32C2404

    Thermal Circuit Breaker, T11 Series, 2 A, 1 Pole, 48 VDC, 240 VAC, Panel

    SCHURTER

    CIRCUIT BREAKER, THERMAL, 1P, 240V, 2A; Product Range:T11 Series; Current Rating:2A; No. of Poles:1 Pole; Voltage Rating VDC:48VDC; Voltage Rating VAC:240VAC; Circuit Breaker Mounting:Panel; Voltage AC:240V RoHS Compliant: Yes

    49 in stock

    + Check Stock & Lead Times

    49 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 11/01/21

    Restricted Item