Technical Documents – Sinotimer STM-63M

The Sinotimer STM-63M is a smart WiFi switch with energy consumption monitoring, remote control, and advanced electrical protections. The device allows turning the power on and off via the Tuya Smart app, monitoring electrical parameters in real time, and protects the installation from overvoltage, undervoltage, overcurrent, and overheating.

It is ideal for homes, offices, commercial spaces, and light industrial applications.

Main Features

• WiFi control via the Tuya Smart app
• Energy consumption monitoring (kWh)
• Display of voltage, current, and power in real time
• Overvoltage protection
• Undervoltage protection
• Overcurrent protection
• Overheating protection
• Scheduling and timer
• State memory after power outage
• Mounting on 35 mm DIN rail
• Voice control via Google Assistant and Amazon Alexa

Technical Specifications

• Brand: Sinotimer
• Model: STM-63M
• Product type: Smart WiFi switch with energy monitoring
• Maximum current: 63A
• Power supply voltage: 90–300V AC
• Frequency: 50/60Hz
• Connection: WiFi 2.4 GHz
• Compatible app: Tuya Smart / Smart Life
• Mounting: 35 mm DIN rail
• Status LED indicator
• Body material: Flame retardant polycarbonate
• Power outage state memory: Yes

Monitoring Functions

• Total energy consumption (kWh)
• Voltage (V)
• Current (A)
• Power
• Energy consumption history

Smart Functions

• Remote control via internet
• On/Off control from the app
• Daily and weekly scheduling
• Timer
• Countdown
• Automations in the Tuya app
• Smart scenarios
• Voice control via Alexa and Google Assistant

Built-in Protections

• Overvoltage protection
• Undervoltage protection
• Overcurrent protection
• Overheating protection
• Power supply fault protection
• Power outage memory

Applications

• Homes
• Electrical panels
• Offices
• Stores
• Laboratories
• Automation systems
• Energy consumption monitoring
• Control of high power electrical devices

Advantages

• Complete energy consumption monitoring
• Control from the phone from anywhere with internet
• Quick installation on DIN rail
• Multiple built-in electrical protections
• Automatic operation scheduling
• Compatible with the Tuya Smart ecosystem
• Voice control without additional equipment

Package Contents

• 1 × Sinotimer STM-63M Smart WiFi Switch
• User manual

Warnings

• The product operates exclusively on 2.4 GHz WiFi networks.
• Installation must be performed by a licensed electrician.
• Do not exceed the maximum current of 63A.