S4A-4CH 4-Channel Tuya Wi-Fi & 433MHz RF Relay Board Module
S4A-4CH, 4-CH Bare PCB, AC/DC 7-32V & USB 5V, 4x 10A Relays, 433MHz RF + Tuya Wi-Fi, Manual Buttons
The S4A-4CH is a high-density 4-channel smart relay module board operating on AC/DC 7-32V, offering 4x 10A dry contacts, 433MHz RF learning, and Tuya Smart app automation for OEM controllers.
Product Overview
The S4A-4CH packs four 10A Form C relays onto a single compact circuit board, providing an economical and powerful automation core for multi-zone systems. Whether switching lighting circuits, electric gate solenoids, or multi-stage pumps, it gives developers and technicians full Wi-Fi and RF remote capability with extensive app automation logic.
Why Buy This Product
Quad-Relay Capacity
Consolidates 4 channels of 10A switching onto a single 73x73mm board for high-efficiency installations.
Onboard Manual Controls
Includes individual physical buttons on the PCB for instant manual relay toggling without software.
Automated Cycle Timers
Ideal for automating alternating irrigation pumps or timed cycling of industrial exhaust fans.
Best for These Applications
Machinery & Equipment Controls
Adds multi-stage remote on/off and pulsing capabilities to specialized electrical hardware.
Hydroponics & Greenhouse Automation
Independently controls nutrient pumps, grow lights, air exhaust, and misting valves.
Key Advantages
- Four Independent Channels:Each channel can be independently assigned separate timers, schedules, and inching pulses in the Tuya app.
- Compact Square Form Factor:Measures just 73 x 73 mm, fitting snugly into standard plastic junction and utility project boxes.
Frequently Asked Questions
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Weight | 0.11 |
| Shipping Weight | 0.16 |
| Channels Count | 4 |
| Switch Type | relay-module |
| Relay Contact Type | Dry Contact (Passive Form C NO/COM/NC) |
| Mounting Type | Surface Screw Mount |
| Input Voltage | AC/DC 7-32V or Micro-USB 5V |
| Power Supply Options | DC Terminal Blocks (7-32V), Micro-USB 5V |
| Max Load Current | 10A per channel (16A Total) |
| Max Load Power | 2200W per channel |
| Relay Cycle Lifespan | ≥ 1,000,000 operations |
| Working Modes | Inching / Jog, Self-Locking, Interlocking |
| Interlock Mode Support | Yes |
| Wireless Protocols | Wi-Fi 2.4GHz, RF 433MHz |
| Rf Remote Supported | Yes |
| Rf Remote Capacity | 14 |
| App Support | Tuya Smart, Smart Life |
| Voice Assistant Compatibility | Amazon Alexa, Google Assistant |
| Timing Functions | Countdown Timer, Scheduled Timer, Circulate Timer |
| Dimensions | 73 x 73 x 18 mm |
| Operating Temp | -20°C to 70°C |
| Operating Humidity | 5% to 90% RH |
| Stock | 5 |
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