S4A-1CN 1-Channel Tuya Wi-Fi Embedded Relay Board Module
S4A-1CN, 1-CH Bare PCB, AC/DC 7-32V & USB 5V, 10A Dry Contact, Inching/Self-Locking, Tuya Wi-Fi
The S4A-1CN is a bare-board 1-channel smart Wi-Fi relay module designed for custom enclosure and OEM integration, operating on AC/DC 7-32V or USB 5V with 10A Form C relay output and Tuya app connectivity.
Product Overview
Specially created for system integrators, electronics builders, and OEM equipment manufacturers, the S4A-1CN delivers the same powerful Tuya smart relay performance as the housed version in an ultra-compact bare PCB form factor. Its lightweight, slim footprint easily fits inside gate motor housings, alarm control panels, intercom stations, and customized DIY project enclosures.
Why Buy This Product
Compact Bare-Board Design
Fits seamlessly inside existing equipment enclosures where bulky plastic cases cannot fit.
Flexible DC / USB Power
Taps power directly from gate motor 12V/24V accessory terminals or Micro-USB ports.
Zero-Latency Pulse Trigger
Instantly pulses 0.5-second dry contacts to simulate a manual button press for gates and barriers.
Best for These Applications
Gate & Barrier Operator Integration
Tucks neatly inside the motor housing to add smartphone control to automatic gate installations.
DIY & Custom IoT Projects
Ideal for makers and integrators building bespoke automated controllers and relays.
Key Advantages
- Ultra-Slim Board Footprint:Measures just 69 x 41 x 17 mm, allowing easy placement inside control panels.
- Passive Dry Contact Output:Isolated relay contacts safely switch voltages without feeding phantom power into host systems.
Frequently Asked Questions
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Weight | 0.04 |
| Shipping Weight | 0.07 |
| Channels Count | 1 |
| Switch Type | inching-module |
| Relay Contact Type | Dry Contact (Passive Form C NO/COM/NC) |
| Mounting Type | Surface Screw Mount |
| Input Voltage | AC/DC 7-32V or USB 5V DC |
| Power Supply Options | DC Terminal Blocks (7-32V), Micro-USB 5V |
| Max Load Current | 10A / 2200W |
| Max Load Power | 2200W (Resistive Load) |
| Quiescent Current | < 80 mA |
| Relay Cycle Lifespan | ≥ 1,000,000 operations |
| Working Modes | Inching / Jog (0.5s default pulse), Self-Locking (Toggle) |
| Inching Duration Range | 0.5s to 3600s programmable via app |
| Wireless Protocols | Wi-Fi 2.4GHz (IEEE 802.11 b/g/n) |
| App Support | Tuya Smart, Smart Life |
| Voice Assistant Compatibility | Amazon Alexa, Google Assistant |
| Timing Functions | Countdown Timer, Scheduled Timer, Circulate Timer |
| Status Indicators | Power LED, Network Pairing LED, Relay Status LED |
| Operating Temp | -20°C to 70°C |
| Operating Humidity | 5% to 90% RH |
| Dimensions | 69 x 41 x 17 mm |
| Stock | 8 |
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