McMaster-Carr logo
    Filter by
    System of Measurement
    Number of Circuits Controlled
    Mounting Location
    Switching Current
    Industrial Info Snippet
    Reset Type
    Switch Designation
    Relay Type
    Number of Terminals
    Switch Starting Position
    Operation Type
    Switch Action
    Industrial Info Compare
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    UL File Number
    Adjustment Mechanism
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Enclosure Rating
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    4 Products

    Current-Monitoring Relays

    Image of Product. Front orientation. Contains Annotated. Monitoring Relays. Current-Monitoring Relays, Screw Terminals, Knob Adjustment.
    Image of Product. Front orientation. Contains Annotated. Monitoring Relays. Current-Monitoring Relays, Screw Terminals with IO-Link, Keypad Adjustment.
    Image of Product. Front orientation. Contains Annotated. Monitoring Relays. Current-Monitoring Relays, Spring-Clamp Terminals with IO-Link, Keypad Adjustment.

    Screw Terminals

    Knob Adjustment

    Screw Terminals

    with IO-Link,

    Keypad Adjustment

    Spring-Clamp

    Terminals with

    IO-Link, Keypad

    Adjustment

    Protect electrical equipment from overcurrent and undercurrent damage—these relays continuously monitor current flow. When current is outside a set range, they trip and cut power to prevent overheating, fire hazards, and stalling. Rated IP20, these relays have recessed terminals that keep fingers and other objects from touching live circuits. Mount them on a 35 mm DIN rail (also known as DIN 3 rail) for fast installation.
    Spring-Clamp-Terminal Wire Connection—Relays with spring-clamp terminals connect and disconnect to wire without screws. Because there’s no screw, these connections are less likely to loosen over time, even in high-vibration environments.
    IO-Link Communication Protocol—Relays with IO-Link can be programmed, monitored, and reset remotely by connecting them to a programmable logic controller (PLC), human-machine interface (HMI), or computer. If you want to program them locally, they have a keypad.
    Knob Adjustment—Relays with knob adjustments have knobs right on the front where you can set your trip current. You can see that they're wired correctly and when they're actuated based on the LED indicators.
    No. of
    Terminals
    Input Voltage
    Trip Current Setting, amp
    Trip Current,
    amp
    Trip Time,
    sec.
    Reset Type
    Switching Current
    @ Voltage
    Max. Switching
    Voltage
    Adjustment Mechanism
    Ht.
    Wd.
    Dp.
    Digital Display
    Type
    Each
    Screw Terminals
     
    1 Circuit Controlled with 1 Off or 1 On—SPDT
    924V AC, 24V DC0.1 to 1, 0.5 to 5, 0.8 to 80.1 to 30Automatic, Manual5 amp @ 240V AC
    5 amp @ 30V DC
    250V AC
    30V DC
    Knob3.5"0.9"3.9"8123N140000000
    9120V AC, 240V AC0.1 to 1, 0.5 to 5, 0.8 to 80.1 to 30Automatic, Manual5 amp @ 240V AC
    5 amp @ 30V DC
    250V AC
    30V DC
    Knob3.5"0.9"3.9"8123N13000000
     
    Screw Terminals with IO-Link
     
    1 Circuit Controlled with 1 Off or 1 On—SPDT
    924V DC0.05 to 100 to 999Automatic3 amp @ 240V AC
    1 amp @ 24V DC
    400V AC
    250V DC
    External Controller, Keypad3.6"0.9"3.4"LCD8123N11000000
     
    Spring-Clamp Terminals with IO-Link
     
    1 Circuit Controlled with 1 Off or 1 On—SPDT
    924V DC0.05 to 100 to 999Automatic3 amp @ 240V AC
    1 amp @ 24V DC
    400V AC
    250V DC
    External Controller, Keypad3.8"0.9"3.4"LCD8123N12000000
     
    back to top