The 16-Channel 5V Relay Module is designed for high-load switching projects where reliability is non-negotiable. With 16 individual relay channels, you can control lights, pumps, motors, and solenoids simultaneously. The onboard LM2576 Buck Regulator is a standout feature—it efficiently manages the power supply to the relay coils, preventing the voltage drops commonly seen in cheaper relay boards that rely on standard linear regulators.
Key Features
Optocoupler Isolation: Provides complete electrical separation between your sensitive microcontroller (Arduino/ESP32) and the high-power relay side, protecting your board from back-EMF spikes.
LM2576 Regulator: Ensures the relay coils receive a constant, stable voltage, preventing chattering or failure during high-load switching.
High-Current Handling: Each relay is rated for heavy-duty switching (up to 10A at 250V AC).
Flexible Logic: Supports high or low-level trigger, making it compatible with almost any microcontroller architecture.
Visual Status: 16 independent indicator LEDs provide real-time feedback on which relays are active.
Technical Specifications
Feature
Specification
Relay Channels
16
Control Voltage
5V DC
Regulator Chip
LM2576 (High-Efficiency Switching)
Isolation
Optocoupler (PC817 or similar)
Max Load
10A @ 250V AC / 10A @ 30V DC
Trigger Logic
High / Low Level Selectable
Weight
2000 g
Dimensions
15 × 10 × 5 cm
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2-Channel 5V / 12V Relay Module with Optocoupler Isolation₨ 200
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