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Small white rectangular relay module with terminal screws visible

Shelly

Shelly Plus 1PM UL 15A relay

SKU CH-34N2-4A37H

A UL-certified smart relay with built-in power metering and 15A switching for remote appliance control

  • Parts warranty2 Years
  • Real-time energy tracking with built-in power meter
  • Remote appliance control via smartphone from anywhere
  • Custom automation scenes triggered by time or sensors
  • Scheduled heating control for efficient climate management
  • Extends wireless coverage with integrated Wi-Fi repeater

UL-certified 15 A smart relay

The Shelly Plus 1PM UL is a single-channel Wi-Fi and Bluetooth relay rated for 15 A loads. It adds power metering and local or cloud control to lighting, outlets and small appliances. Installation fits behind standard wall switches or in tight enclosures. No separate hub is required for operation.

Sustained-load behaviour

The integrated precision power meter logs real-time consumption continuously during extended operation. Free data logging lets you review long-term usage patterns without gaps. Wireless connectivity remains active through the built-in Wi-Fi repeater function. The device stays responsive whether controlled locally or via cloud automation.

Upgrade path and limits

This relay replaces a basic mechanical switch or non-metered smart module when energy visibility matters. It suits retrofits where a hub-free, UL-listed 15 A solution is needed. Buyers who require higher amperage, multi-channel switching or hard-wired Ethernet connectivity will need a different device.

How it compares

Measured against everything we stock in Solenoid & Power Relays, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 58% of the 125 comparable items (median $26.99).

Specifications

Product
Brand nameShelly

Questions about this item

How much heat does the 15 A relay generate during continuous operation?

The unit is UL certified and designed for in-wall mounting behind standard switches, indicating safe thermal performance at its rated load.

What wiring must already be present to install the 15 A smart relay?

A live, neutral and switched load connection are required; the module fits behind a standard wall switch or socket.

Will the 15 A relay work with my existing mechanical wall switches?

Yes, it installs behind standard wall switches or sockets and can be triggered by the existing switch wiring while adding app and voice control.

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