4 / 6-Ch 5V Solid State Relay Module | ATMOSFÆR ENGINEERING

Six-channel solid-state relay board with optocoupler isolation for safe control of AC/DC loads. Each channel can be triggered independently via high or low-level signals from microcontrollers. Zero-crossing detection ensures smooth switching without electrical noise. Ideal for home automation, industrial control, and IoT projects requiring multiple high-power load switching.

Technical Specifications:

• Relay Type: Solid-State Relay (SSR) with optocoupler isolation
• Number of Channels: 6 independent channels
• Control Voltage: 5V DC (selectable/compatible)
• Trigger Type: High-level or low-level trigger (configurable)
• Trigger Current: ~5mA per channel
• Static Current: 0mA (no power consumption when idle)
• Load Voltage Rating: AC 250V/10A or DC 30V/10A per channel
• Maximum Working Current: 90mA per relay coil
• Switching Method: Zero-crossing (AC) for noise-free operation
• Relay Lifespan: 10 million cycles (typical SSR lifespan)
• Isolation: Optocoupler isolation between control and load circuits
• Indicator LEDs: Status LED for each channel
• Module Dimensions: ~135mm x 52mm (approximate)
• Operating Temperature: -10°C to +70°C

Terminal Configuration:

• DC+/VCC: Power supply positive (5V)
• DC-/GND: Ground
• IN1-IN6: Control signal inputs (one per channel)
• Load Terminals: COM (common), NO (normally open) for each channel

Features:

• Solid-state switching (no mechanical wear, silent operation)
• Optocoupler isolation protects microcontroller from high voltage
• Zero-crossing detection reduces EMI and inrush current
• Compatible with 3.3V, 5V logic (with appropriate trigger level)
• LED indicators show relay status
• High reliability (10 million switching cycles)
• Supports both AC and DC loads
• Screw terminals for secure connections

Wiring:

• Power: DC+ to 5V, DC- to GND
• Control: IN1-IN6 to microcontroller GPIO pins
• Load: Connect AC/DC load between COM and NO terminals
• Zero Line/Live: AC loads connect to zero (neutral) and line (hot)

Applications:

• Home automation (lights, fans, appliances)
• Industrial equipment control
• HVAC system automation
• Pump and motor control
• Smart lighting systems
• Arduino/ESP32/Raspberry Pi projects
• Multi-zone heating/cooling control
• Agricultural automation (irrigation, ventilation)
• Security system integration

Advantages over Mechanical Relays:

• Silent operation (no clicking sound)
• Longer lifespan (no mechanical contacts to wear)
• Faster switching speed
• Zero-crossing reduces electrical noise
• More reliable for frequent switching

Important Notes:

• Each channel rated for 10A - do not exceed this limit
• Use appropriate fuse protection for loads
• Ensure proper wire gauge for current requirements
• AC load wiring must follow local electrical codes
• High-level trigger: Relay ON when input is HIGH
• Low-level trigger: Relay ON when input is LOW (check jumper settings)

Compatible with Arduino, ESP32, Raspberry Pi, PLC, and any 5V microcontroller or control system. Perfect for controlling multiple high-power devices safely from low-voltage logic.