SPECIFICATIONS

Brand Name: NONE

Condition: New

Dissipation Power: -

High-concerned chemical: none

Operating Temperature: -

Origin: Mainland China

Quantity: 1

Supply Voltage: -

Type: Module

is_customized: Yes

20A Isolated Electronic Switch Module High Low Side MOSFET Switch Optocoupler Isolation Solid State Relay for DC Motor Control

Product Overview

This compact Solid State Relay (SSR) module provides reliable, silent, and long-lasting switching for DC loads. It replaces mechanical relays with a fully solid-state design using optically isolated MOSFETs, offering a wide control voltage range (3-30V), low control power consumption, and bidirectional current handling. Ideal for high-cycle applications where durability and noise-free operation are critical.

Features

High Current & Voltage Rating: Controls DC loads up to 20A at 30V.
Wide Control Voltage Range: Operates with a low-power 3V to 30V DC input signal, compatible with most microcontrollers without needing a driver circuit.
Optical Isolation & Bidirectional Switching: Features photocoupler isolation between control and load circuits for safety. Can be used for both high-side and low-side switching configurations.
Solid-State Reliability: No moving parts, eliminating contact arcing, mechanical wear, bounce, and audible noise. Offers a significantly longer lifespan than electromechanical relays.
Compact Design: Small footprint (28x13x4mm) saves space in your project.

Technical Specifications:

Control Signal Voltage: 3 – 30 V DC
Load Voltage (Max): 30 V DC
Continuous Load Current (Max): 20 A
Switching Time: Turn-On ~1.5 ms, Turn-Off ~1 ms
Isolation: Photocoupler
Switching Type: Single Pole Single Throw (SPST)
Dimensions (Board only): 28 x 13 x 4 mm

⚠️ Critical Usage Notes & Warnings

NOT for PWM Control: This module is designed for ON/OFF switching only. Do not use with PWM signals.
Thermal Management is Essential: The MOSFETs can be permanently damaged by overheating.
- Monitor Temperature: If the average continuous switching current exceeds half the maximum rating (10A), closely monitor the MOSFET temperature.
- Active Cooling Required:Heatsinking is strongly recommended for loads above 10A at 24V. If module temperature exceeds 50°C (122°F), you must add a heatsink or active cooling (fan) to prevent damage.
- Do Not Exceed Limits: Permanent damage will occur if voltage, current, or temperature limits are exceeded.