Smart switch Shelly 1PM Gen4 — wireless 110–240V AC, max 240V, power measurement, 16 A, 42×16×37 mm

Shelly 1 PM Gen4 Controller Zigbee/Matter is a compact built-in switch with power metering designed for inline power switching and energy monitoring. The device supports Zigbee, Wi‑Fi, Bluetooth and Matter and is intended for installation in flush-mounted boxes behind sockets or light switches. It provides real-time measurements of voltage, current and power and can be integrated with smart home platforms and automation systems for remote control and monitoring.

Advantages

The Shelly 1 PM Gen4 combines small dimensions with multi-standard wireless connectivity and accurate power measurement. It supports local and remote control via Wi‑Fi, Bluetooth, the Shelly app and a local web interface, and allows integrations such as MQTT, HTTPS, Webhooks, KNXnet/IP and ShellyScript. The device can function as a Zigbee and Wi‑Fi repeater, supports scheduling of up to 20 tasks, scene automation and includes an internal temperature sensor for protection against overheating.

Suitable for

• Automating lighting circuits and wall switches
• Remote switching and monitoring of household appliances
• Energy consumption tracking and optimization in homes or offices
• Integration with Alexa, Google Assistant, SmartThings and Home Assistant

Key specifications

• Manufacturer: Shelly; Model: 1PMGen4
• Dimensions: 37 × 42 × 16 mm; Weight: 27 g
• Power supply: 110–240 V~ or 24–30 V⎓; Power consumption: < 1 W; Neutral required; max switching voltage 240 V
• Communication: Wi‑Fi 802.11 b/g/n (2412–2472 MHz), Bluetooth 5.0 (2402–2480 MHz), Zigbee 802.15.4 (2400–2483.5 MHz), Matter
• Range (typical): Wi‑Fi up to 30 m indoors, Bluetooth up to 10 m indoors, Zigbee up to 100 m indoors
• Measurements: built-in voltmeter, ammeter and internal temperature sensor; Flash memory: 8 MB
• Mounting: flush-mounted box; Housing: plastic (red) with gray clamp
• Environmental: operating temperature −20 °C to 40 °C; humidity 30–70% RH; max altitude 2000 m
• Safety: external overcurrent protection required (EN60898‑1, characteristic B or C, max 16 A)

How to use

Install the Shelly 1 PM Gen4 inside a flush-mounted box behind a socket or switch in accordance with local electrical regulations. Ensure the neutral conductor is present and connected. Wire supply and load following the manufacturer’s wiring diagram, secure terminals with the recommended torque and prepare conductors to the specified length. Configure the device using the Shelly app, the local web interface or via Bluetooth, or pair it with a Zigbee or Matter-compatible hub. Use the app or web interface to monitor real-time power readings, set up schedules (up to 20 tasks), create scenes and configure MQTT or Webhooks for automation.

Recommendations

Use an external overcurrent circuit breaker compliant with EN60898‑1 (characteristic B or C, rated current up to 16 A), keep the device within the specified environmental limits and ensure adequate ventilation to avoid overheating. Verify firmware updates and integration settings in your smart home platform for reliable operation.