M5STACK Single-phase DC SSR Unit (CDG1. 1DD-10A)

The M5STACK Single-phase DC SSR Unit (CDG1. 1DD-10A) is a solid-state relay module designed for switching DC loads up to 10 amperes with zero-crossing detection and galvanic isolation capabilities. Industrial automation engineers, IoT developers, and control systems integrators rely on this unit to replace mechanical relays in applications requiring fast switching speeds, extended operational lifespan, and reduced electromagnetic interference. This product solves the critical challenge of controlling high-current DC circuits from low-voltage microcontroller logic while maintaining electrical isolation and eliminating relay contact wear.

Product Overview

The M5STACK CDG1. 1DD-10A is a single-phase DC solid-state relay that utilizes semiconductor switching technology to control DC power circuits without moving contacts. Unlike electromechanical relays that rely on electromagnetic coils and mechanical contacts, this SSR employs a MOSFET or thyristor-based switching mechanism that activates instantaneously upon receiving a logic signal. The internal architecture includes an optoisolator for input isolation, ensuring that the control circuit remains electrically separated from the high-current switching stage, thereby protecting sensitive microcontrollers and logic circuits from voltage spikes and ground loops. The 10-ampere rating makes it suitable for moderate-power DC applications including motor control, LED strip switching, solenoid activation, and battery charging circuits.

This module integrates seamlessly with M5STACK ecosystem components and standard microcontroller platforms through simple GPIO pin connections. The CDG1. 1DD-10A features built-in snubber networks and transient suppression to handle inductive loads safely, eliminating the need for external protection components in most applications. Its compact form factor and standardized pinout allow for rapid prototyping and integration into control panels, making it an ideal choice for engineers developing industrial IoT solutions, smart home automation systems, and remote power management applications where reliability and fast switching response are critical performance requirements.

Key Specifications

Specification	Details
Product Type	Single-phase DC Solid-State Relay Module
Brand	M5STACK
Model Number	CDG1. 1DD-10A
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Maximum Load Current	10 Amperes DC
Input Control Voltage	3.3V to 5V logic level compatible
Switching Time	Less than 10 milliseconds
Isolation Voltage	2500V galvanic isolation between input and output
Operating Temperature Range	-20°C to +70°C
Load Voltage Range	5V to 60V DC

Key Features

• 10A DC Load Switching Capacity: Handles moderate to high-current DC circuits including motors, solenoids, and LED arrays without external amplification stages
• Galvanic Isolation with 2500V Rating: Optoisolator-based input isolation protects microcontroller circuits from high-voltage transients and ground loop interference
• Logic-Level Control Input: Compatible with 3.3V and 5V microcontroller outputs including Arduino, ESP32, Raspberry Pi, and M5STACK Core modules
• Zero Switching Delay: Sub-10 millisecond response time enables precise timing control for PWM applications and rapid load switching scenarios
• Built-in Protection Circuitry: Integrated snubber networks and transient suppression handle inductive load spikes without requiring external protection components
• Wide Load Voltage Support: Operates with DC sources ranging from 5V to 60V, providing flexibility across diverse industrial and consumer applications

Applications and Use Cases

• DC Motor Control Systems: Switch brushed and brushless DC motors up to 10 amperes with microcontroller-based speed and direction control for robotics and automation
• Industrial Solenoid Valve Activation: Control pneumatic and hydraulic solenoid valves in manufacturing equipment, irrigation systems, and automated machinery
• LED Strip and Lighting Control: Switch high-brightness LED strips, LED arrays, and decorative lighting systems in smart home and architectural lighting applications
• Battery Charging and Power Management: Implement intelligent battery charging circuits, load switching, and power distribution in renewable energy systems and portable power solutions
• IoT Remote Power Control: Build connected devices for remote equipment shutdown, emergency load shedding, and intelligent power distribution in industrial IoT applications
• Electromagnetic Lock Control: Activate and deactivate electromagnetic locks and access control systems in security applications with reliable 10A switching capacity

How to Use

To implement the M5STACK CDG1. 1DD-10A in your project, connect the control input pins to your microcontroller GPIO output (3.3V or 5V logic level). The module requires three essential connections: the logic input signal from your controller, a common ground connection between the control circuit and SSR module, and the DC load connections on the output terminals. Configure your microcontroller GPIO pin as a digital output and set it HIGH to activate the relay and switch on your DC load, or LOW to deactivate and disconnect power. For Arduino-compatible platforms, use digitalWrite(pin, HIGH) or digitalWrite(pin, LOW) commands; for ESP32 and similar platforms, use the same GPIO control functions with appropriate pin definitions.

When designing your circuit, ensure proper wire gauge selection based on the 10-ampere load current to prevent voltage drop and overheating. For inductive loads such as motors and solenoids, the built-in snubber circuitry handles transient suppression, but verify that your power supply can deliver the required current without voltage sag during load switching. Always use a separate power supply for your DC load circuit and maintain common ground connections between the control circuit and load circuit to ensure proper optoisolator operation. For PWM applications requiring variable load control, the module supports PWM frequencies up to several kilohertz, enabling smooth speed control and dimming functions in motor and lighting applications.

Frequently Asked Questions

What is the maximum switching frequency of the CDG1. 1DD-10A?

The M5STACK CDG1. 1DD-10A supports PWM switching frequencies up to 10 kHz, making it suitable for variable speed motor control, LED dimming, and other applications requiring rapid on-off cycling. The sub-10 millisecond switching time ensures clean transitions without ringing or oscillation, even at maximum frequency. For DC load switching applications, there is no practical frequency limitation as the module can handle continuous switching cycles indefinitely within its thermal specifications.

Can this SSR handle inductive loads like relay coils and motor windings?

Yes, the CDG1. 1DD-10A includes integrated snubber networks and transient suppression circuitry specifically designed to handle inductive loads safely. When an inductive load is switched off, the built-in protection components suppress the back-EMF voltage spike that would otherwise damage the SSR. However, for very high-inductance loads or applications with extreme transient conditions, external freewheeling diodes or RC snubber networks may provide additional protection. Always verify that your specific inductive load specifications fall within the module's rated voltage and current parameters.

Is galvanic isolation truly necessary for my microcontroller application?

The 2500V galvanic isolation in the CDG1. 1DD-10A provides critical protection in applications where the DC load circuit operates at different ground potentials or where high-voltage transients are present. Even in low-voltage applications, isolation prevents ground loop currents that can cause logic errors and false triggering in sensitive microcontroller circuits. For any application where the load circuit is physically separated from the control circuit or powered by a different supply, galvanic isolation is highly recommended to ensure system reliability and prevent damage to your microcontroller.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy M5STACK Single-phase DC SSR Unit (CDG1. 1DD-10A) Online in India

Purchase the M5STACK Single-phase DC SSR Unit (CDG1. 1DD-10A) online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on M5STACK Single-phase DC SSR Unit (CDG1. 1DD-10A) with fast shipping and expert support.

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