Tuya Multistage Smart Thermostat OEM Welcomed 503-TY

Main Feature:

  • Model: 503-TY
  • Item Dimension: 160(L) × 87.4(W)× 33(H) mm
  • Fob Port: Zhangzhou, China
  • Payment Terms: L/C,T/T

  • Product Detail

    Tech Specs



    Product Tags

    Main Features:

    HVAC Control
    Supports 2H/2C multistage conventional system and Heat Pump system.
    One-touch AWAY button to save energy while you are on the go.
    The 4-period and 7-day programming fits perfectly with your life style. Program your schedule either on the device or through the APP.
    Multiple HOLD options: Permanent Hold, Temporary Hold, Back to Schedule
    Automatic heating and cooling changeover.
    Fan cycle mode periodically circulates air for comfort.
    Compressor short cycle protection delay.
    Failure protection by cutting off all circuit relays after power outage.
    Information Display
    3.5” TFT color LCD divided into two sections for better information display.
    The default screen displays the current temperature/humidity, temperature set-points, system mode, and schedule period.
    Display time, date and day of the week in a separate screen.
    The system working status and fan status are indicated in different backlit colors (Red for heat-on, Blue for cool-on, Green for fan-on)
    Unique User Experience
    Screen lights up for 20 seconds when motion is detected.
    Interactive wizard guides you through the quick setup without hassles.
    Intuitive and simple UI to ease the operation even without user’s manual.
    Smart rotary control wheel + 3 side-buttons for easy operation while adjusting temperature or navigating menus.
    Wireless Remote Control
    Remote control using mobile APP by working with compatible ZigBee Smart Home Systems, allowing multiple thermostats to be accessed from single APP.
    Compatible with ZigBee HA1.2 with complete technical document available to facilitate the integration with 3rd party ZigBee hubs.
    Over-the-Air firmware upgradable via WiFi as optional.
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  • ▶ Main Specification:

    HVAC Control Functions

    System Mode

    Heat, Cool, Auto, Off, Emergency Heat (Heat Pump only)

    Fan Mode

    On, Auto, Circulation


    Local and remote setting of the temperature

    Auto-changeover between heat and cool mode(System Auto)

    Compressor short cycle protection delay of 2 minutes

    Failure protection by cutting off all circuit relays thanks to the Super Capacitor

    Auto Mode Deadband

    1.5° C, 3° F

    Temp. Sensing Range

    −10°C to 125°C

    Temp. Resolution

    0.1° C, 0.2° F

    Temp. Display Accuracy ±1°C
    Temp. Setpoint Span

    0.5° C, 1° F

    Humidity Sensing Range

    0 to 100% RH

    Humidity Accuracy

    ±4% Accuracy through the range of 0% RH to 80% RH

    Humidity Response Time

    18 seconds to reach 63% of the next step value

    Wireless Connectivity


    ZigBee 2.4GHz IEEE 802.15.4, ZHA1.2 Profile, Router Device

    Output Power

    +3dBm (up to +8dBm)

    Receive Sensitivity



    Optional Over-the-Air Upgradable via wifi



    Physical Specifications

    Embedded Platform MCU: 32-bit Cortex M4; RAM: 192K; SPI Flash: 16M
    LCD Screen 3.5” TFT Color LCD, 480*320 pixels
    LED 3-color LED (Red, Blue, Green)
    Buttons One rotary control wheel, 3 side-buttons
    PIR Sensor

    Sensing Distance 5m, Angle 30°


    Click sound

    Data Port

    Micro USB

    DIP Switch

    Power selection

    Electrical Rating

    24 VAC, 2A Carry; 5A Surge 50/60 Hz


    Latching type relay, 2A maximum loading

    1. 1st stage control

    2. 2nd stage control

    3. 3rd stage control

    4. Emergency Heating control

    5. Fan Control

    6. Heating/cooling Reverse Valve Control

    7. Common


    160(L) × 87.4(W)× 33(H) mm

    Mounting Type

    Wall Mounting


    18 AWG, Requires both R and C wires from the HVAC System

    Operating Temperature

    0° C to 40° C (32° F to 104° F)

    Storage Temperature

    -30° C to 60° C



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