SRS01-1PM

Applies to: SRS01 1PM | Hardware Revision: V1.0+ | Last Updated: 2026-05-27

1. Introduction

SRS01 1PM is a compact single-channel relay switch with integrated power monitoring and wireless communication. It provides real-time measurement of voltage, current, power, and energy, making it ideal for smart home automation and lighting control.

Product Highlights

Mini Retrofit Design: Ultra-compact (38×42×16mm) fits behind existing switches. Supports 16A max load, keeping your original switch style while adding smart control.
Real-time Monitoring: Measures real-time voltage, current, power, and energy for precise consumption tracking across home and commercial devices.
16A Control Support: Works with both toggle and momentary switches. Control lights via App or physical wall switch simultaneously without conflict.
Flexible Connectivity: Available in 3 editions to match your needs: Tuya Wi-Fi (Easy App), Matter over Wi-Fi, or Open Wi-Fi <-> Standard Zigbee 3.0 Switchable.
Built-in Safety: Equipped with over-temperature, over-current, and over-voltage protection to extend product lifespan and minimize failure risks.

Typical Applications

Smart Lighting: Install behind the roof or wall switches
Smart Appliance control: Control pumps, boilers, and appliances easily
Smart HVAC: Automate fans, heaters, and ventilation systems

2. Part Description

Element

Description

Terminal Block(Screw Terminal)

Wiring terminals for connecting Live, Neutral, and switch input wires

Reset button

Press the button 3~5 seconds to enter the pairing mode

LED

Shows device operation and network status through different flashing patterns ¹⁾

Product model

Refer to the ‘Ordering Information’ section for product selection

Remark:

1) Refer to the user guide of your selected models for detailed LED status indicators.

3. Technical Data

Parameter

Specification

Rated operating voltage U_n

110-240 VAC, 50/60 Hz

Max Switching Load (Resistive)

16 A

Type of switching

Relay, Micro gap (μ)

Over-voltage category

Rated insolating voltage U_i

250V

Rated impulse withstand voltage Uimp

2.5kV

Pollution degree

Protection degree

IP20

Rated operating temperature

-20 to 40°C

Humidity

30% to 70% RH

Max. altitude

2000m / 6562 ft

Conductor cross section

24 to 14AWG / 0.2 to 2,5mm²

Conductor stripped length

6 to 7mm / 0.24 to 0.28in

Screw terminals max torque

0.4Nm / 3.5Ibin

Measurement accuracy

±2% (Active energy)

Maximum Power consumption

≤ 3VA

Size: Height x Width x Depth

38mm x 42mm x 16mm

Integrated communication option

BLE; Wi-Fi; Zigbee;

Nominal Power of Typical Loads ^{1) 2)}

Incandescent & halogen lamps

2000 W

LED lamps3)4)

600 W

Fluorescent lamps

500 VA

Inductive motors (e.g., fans, pumps, compressors)

1000 VA

Resistive heaters (e.g., boilers, room heaters)

2500 W

Remark: 1) If you are unsure about the load type or its impact on the smart relay switch, please contact our technical support.

2) Individual channel value based on 220–240 VAC power supply.

3) Inrush current Ion ≤ 78 A / 5 ms

4) Due to variations in lamp electronics and manufacturers, the maximum value of controllable lamps may vary.

4. Mechanical Outline

Dimension: Unit in mm

5. Electrical Installation

Wiring Diagram

⚠️ Safety Remarks:

The device must be associated with easily accessible upstream protective devices ‒ such as miniature circuit breakers (MCB).
The device must be installed, operated, serviced, and maintained ONLY by qualified professionals.
Please read the user guide carefully before installation for detailed wiring diagrams and safety precautions.

Installation Video

6. User Interface

Reset Button

Press and hold for 3–5 seconds to enter pairing mode.

LED Indicator

Solid ON

Device connected - the device is online and functioning normally with cloud connectivity.

Flashing at 2Hz

Pairing mode – press and hold the reset button until the LED flashes rapidly.

Flashing at 0.5Hz

Reconnecting to network - the device is attempting to reconnect using saved network settings.

Flashing at 1Hz

Network connected, cloud unreachable - the device is connected to Wi-Fi/Zigbee, but failed to reach the cloud.

Flashing at 0.25Hz

The device failed internal self-check. Please power off, restart, and reconfigure the network settings.

Flashing at 1Hz

Fault alarm (overheat, overcurrent, or relay failure) - The device has detected a fault. Please check the wiring and the device.

Solid ON

Zigbee connected, BLE disconnected – the device is connected to a Zigbee network while BLE is turned off or not connected.

Flashing at 2Hz

Pairing mode – press and hold the reset button until the LED flashes rapidly.

Flashing at 0.5Hz

Reconnecting to network - the device is attempting to reconnect both BLE (if available) and Zigbee using saved settings.

Flashing at 1Hz

BLE connected(if available) - the LED flashes at 1Hz whenever BLE is connected, regardless of Zigbee status.

Flashing at 0.25Hz

The device failed internal self-check. Please power off, restart, and reconfigure the network settings.

Flashing at 1Hz

The device has detected a fault. Please check the wiring and power supply.

7. System Integration

Products equipped with different communication SOC firmwares connect to different systems and cloud platforms. Users can select the appropriate version based on their specific application requirements.

The Tuya WiFi version can only be integrated into the Tuya Cloud using Tuya's encrypted MQTT communication. It cannot be integrated with any third-party cloud platforms, ecosystems, or gateways.

However, Tuya's Smart Life App is user-friendly and straightforward, making it ideal for entry-level smart home users who prefer simplicity and basic energy consumption monitoring.

The Standard Zigbee 3.0 version can seamlessly connects to third-party gateways. Thanks to the standardized application-layer integration of Zigbee 3.0, it is highly convenient and widely applicable for both residential and commercial building projects.