Shelly Pro 3EM Switch Add-on - Switch Add-on, White

The Shelly Pro 3EM Switch Add-on is a galvanically isolated accessory for Shelly Pro 3EM energy meters. It allows for direct switching of contactors and electrical loads based on meter readings. Galvanic isolation separates the control circuitry from the measurement side of the installation, which is useful when managing high-voltage equipment in residential, agricultural, or commercial systems. Users can automate power distribution by triggering devices directly from the meter without needing an additional control unit.

The unit mounts directly onto standard DIN rails in electrical panels. It measures 19 × 69 × 94 mm, allowing it to fit into crowded distribution boards. Weighing 20 g, it adds negligible weight to the enclosure. Because it attaches next to the existing meter, it requires very little space, keeping panel wiring tidy and accessible for maintenance.

• Requires a Shelly Pro 3EM series energy meter; functions only as an expansion module.
• Supports a maximum switching voltage of 240 V AC for standard residential and commercial load management.
• Supports a maximum switching current of 2 A, sufficient for triggering external contactors.
• Includes an integrated temperature sensor for monitoring heat during operation.
• Features two red LEDs on the casing to show power status and output activity.