McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    14 Products

    DIN-Rail Mount Branch Circuit Breakers

    Image of ProductInUse. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers.
    Image of Product. Extension Terminal. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers.
    Image of Product. Distribution Bar Terminal Cover. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers.
    Image of Product. Shunt Trip. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers.

    Extension

    Terminal

    Distribution

    Bar Terminal

    Cover

    Shunt

    Trip

    Image of Product. Auxiliary Contact. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers.
    Image of Product. Distribution Bar. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers.

    Auxiliary

    Contact

    Distribution Bar

    Distribution bar terminal covers shield unused, live terminals on distribution bars to prevent injury and damage.
    Auxiliary contacts send a signal to other equipment when the circuit trips. They can activate a warning light, initiate a shutdown, or start a backup power source.
    Shunt trips receive a signal from equipment to trip your circuit breaker in situations other than overload or short circuit conditions. For example, use them with a smoke detector to shut off power to a system in the event of a fire.
    Extension terminals raise the wire connection point above distribution bars for easy access to connect power to a set of circuit breakers.
    Mount these circuit breakers directly to DIN rail to protect equipment and wiring in an area of your facility from overloads and short circuits. Because they are thermal-magnetic, these breakers trip two ways. They either trip when heat is generated slowly by consistent low-level overload current, or they trip quickly when the magnetic coil senses a high-current short circuit.
    Distribution bars simplify wiring by powering multiple adjacent circuit breakers without needing separate wires for each one. This cuts down on assembly time and space.
    C Trip
    Image of Product. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers, 1 Pole—Toggle-Switch Style.
    Image of Product. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers, 2 Poles—Toggle-Switch Style.
    Image of Product. Front orientation. Circuit Breakers. DIN-Rail Mount Branch Circuit Breakers, 3 Poles—Toggle-Switch Style.

    1

    Pole—Toggle-Switch

    Style

    2

    Poles—Toggle-Switch

    Style

    3

    Poles—Toggle-Switch

    Style

    C-trip circuit breakers are the most common. They’re best for applications such as lighting and control panels, where equipment startup causes a moderate spike in current. They won’t trip until a rush of current reaches 5 to 10 times their rated current.
    UL 489—They meet UL 489 requirements for branch circuit protection and are certified as current limiting, so they protect equipment by minimizing passing current during a short circuit.
    Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
    Voltage
    Freq., Hz
    Breakthrough Current @ Voltage
    For DIN
    Rail Size, mm
    Mounting
    Location
    Wire Connection
    Ht.
    Wd.
    Dp.
    Temp. Range,
    ° F
    Specs. Met
    Certification
    Current,
    A
    Each
    1 Pole—Toggle-Switch Style
     
    Thermal/Magnetic
    48V DC
    277V AC
    50/6010,000 amp @ 277V AC
    10,000 amp @ 48V DC
    35DIN RailScrew-Clamp Terminal4.13"0.7"2.36"-10 to 165UL 489, IEC 60947-2CSA Certified, CE Marked
    1 1/25789T103000000
     
    2 Poles—Toggle-Switch Style
     
    Thermal/Magnetic
    96V DC
    277V AC
    480YV AC/277V AC
    50/6010,000 amp @ 277V AC
    10,000 amp @ 480V AC
    10,000 amp @ 96V DC
    35DIN RailScrew-Clamp Terminal4.13"1.4"2.36"-10 to 165UL 489, IEC 60947-2CSA Certified, CE Marked
    1 1/25789T11700000
     
    3 Poles—Toggle-Switch Style
     
    Thermal/Magnetic
    277V AC
    480YV AC/277V AC
    50/6010,000 amp @ 277V AC
    10,000 amp @ 480V AC
    35DIN RailScrew-Clamp Terminal4.13"2.09"2.36"-10 to 165UL 489, IEC 60947-2CSA Certified, CE Marked
    1 1/25789T132000000
     
    Accessories for Circuit Breakers

    Panel-Mount Equipment Circuit Breakers

    Mount these breakers, also known as supplemental protectors, through panels downstream from a branch circuit breaker to protect a single piece of equipment. These breakers can also be used as on/off switches. All are thermal, so they use the heat generated in overcurrent situations to trip the breaker.
    Toggle-Switch Style—Screw-On Mount
    Image of Product. Front orientation. Circuit Breakers. Panel-Mount Equipment Circuit Breakers, Toggle Switch Manual Reset.
    UL 1077—They are rated UL 1077 for protection against overloads and short circuits.
    Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
    Current,
    A
    Voltage
    Freq., Hz
    Breakthrough Current @ Voltage
    For Panel
    Cutout Dia.
    Dp. Behind
    Panel
    Mounting Fasteners
    Included
    Quick-Disconnect
    Tab Wd.
    Temp. Range,
    ° F
    Specs.
    Met
    Certification
    Each
    1 Pole
    1 1/275V DC
    250V AC
    50/601,000 amp @ 250V AC
    800 amp @ 75V DC
    1/4"2.42"Yes0.25"-20 to 140UL 1077UL Recognized Component
    7588T18000000
     

    Blade-Style Circuit Breakers

    Protect against overload and short circuits in low-voltage automotive and other electronic applications. These circuit breakers can replace type ATC, AF, ATO, and 257 blade-style fuses. They are thermal, so they trip when heat is generated by overload current.
    Manual Reset—Push-Button Style
    Image of Product. Front orientation. Circuit Breakers. Blade-Style Circuit Breakers, Manual Reset—Push-Button Style.
    Manual reset breakers require you to push a button after they trip.
    UL 1077—Place UL 1077-rated breakers downstream from a branch circuit breaker to protect a single piece of equipment. They are also known as supplemental protectors.
    Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
    Current,
    A
    Breakthrough Current @ Voltage
    Mounting
    Location
    Ht.
    Wd.
    Blade
    Ht.
    Temp. Range,
    ° F
    Specs.
    Met
    Each
    72V DC
    250V AC
    1 1/22,000 amp @ 250V AC
    2,000 amp @ 72V DC
    Fuse Block2.06"0.96"0.25"0 to 140UL 10776493T14000000
     
    DIN-Rail Mount Holders for 250V AC/72V DC Circuit Breakers
    back to top