Description
Description
The 8-Channel Solid State Relay Module (AC to DC Control) is a versatile and robust switching solution designed to control high-power AC loads using a wide range of low-voltage DC control signals. Unlike standard SSRs that require a fixed control voltage, this module accepts any DC input from 3V to 24V, making it exceptionally flexible for integration into nearly any system — from 3.3V microcontrollers to 24V industrial PLCs.
Each channel provides complete optical isolation between the low-voltage control side and the high-voltage AC load side, ensuring safety and noise immunity. The module supports both high-level and low-level trigger modes, allowing you to configure it for active-HIGH or active-LOW logic without additional components. Built-in LED indicators per channel provide clear visual feedback of relay status.
This module is the ideal choice for engineers, integrators, and hobbyists who need a single relay board that works across multiple projects with different control voltages — no need to stock separate 5V, 12V, and 24V versions.
Features
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Wide DC control voltage range: 3V – 24V (one module works everywhere)
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Optically isolated control and load sides
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Selectable high-level or low-level trigger per channel
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Zero-crossing switching for reduced EMI and longer load life
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Silent, vibration-resistant, maintenance-free operation
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LED indicators for each channel
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Controls AC loads up to 240V / 2A per channel
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Screw terminals for secure AC wiring
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Compact 8-channel layout for panel mounting
Technical Parameters
| Parameter | Value |
|---|---|
| Control Voltage Range (DC) | 3V – 24V (wide voltage) |
| Trigger Mode | High-Level or Low-Level (configurable) |
| Number of Channels | 8 |
| Load Type | AC (50/60Hz) |
| Maximum Load Current | 2A per channel (resistive) |
| Maximum Load Voltage | 240V AC |
| Isolation Voltage | ≥ 1500V RMS |
| Module Dimensions | Approx. 150mm × 70mm × 25mm |
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