Prevent AC current overload in equipment such as motors and heaters.

These relays sense current flowing through wires routed through the opening. If the current exceeds a set trip point, the relay trips and starts the adjustable delay timer. After the timer's cycle, the relay cuts power to the equipment to protect against overload. Once current drops below the trip point, the relay allows power to flow again to the equipment.

To determine the current trip range for more than one wire, divide the listed trip range by the number of wires passed through the opening.

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.

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.

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.

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.

For technical drawings and 3-D models, click on a part number.