Industrial DC-AC Solid State Relay SSR 60A–400A High Power

Industrial DC-AC Solid State Relay (SSR) — 60A to 400A High Power

Take full control of your high-power AC loads with this industrial-grade DC-to-AC Solid State Relay (SSR). Available in a wide range of current ratings — from 60A all the way up to 400A — this relay offers silent, spark-free switching, long service life, and fast response times, making it the ideal choice for industrial automation, heating systems, motor control, and heavy-duty electrical applications.

Made in Mainland China.

Key Features

• Wide Current Range: Available in 60A, 80A, 100A, 120A, 150A, 200A, 250A, 300A, 340A, and 400A ratings to suit virtually any high-power application.
• DC Control, AC Output: Low-voltage DC input signal (typically 3–32V DC) controls a high-voltage AC load up to 480V.
• High Max Voltage: Max forward/reverse voltage of 480V for compatibility with industrial power systems.
• Zero-Crossing Switching: Minimizes electrical interference and extends the life of connected loads.
• No Mechanical Contacts: Fully solid-state design means no arcing, no noise, and virtually maintenance-free operation.
• Customizable: Custom configurations available — contact us with your requirements.

Specifications

⚠️ Important Selection Guidelines

1. Choosing the Right Current Rating

The current rating printed on this module represents the average on-state value, not the continuous RMS operating current. Always apply an appropriate safety margin based on your actual load conditions:

• Resistive loads: Multiply actual load current × 2 to 2.5 to determine the required module rating.
• Inductive loads: Multiply actual load current × 6 to 7 to determine the required module rating.

2. Heat Sink Requirement

When the actual operating current exceeds 5A, a compatible heat sink must be installed to ensure safe and reliable operation. Failure to do so may cause overheating and reduce device lifespan.

3. Stock & Bulk Orders

Standard models are available in stock for immediate dispatch. For bulk orders, please contact our customer service team with your required quantity to confirm lead times and availability.

Common Applications

• Industrial automation and PLC control systems
• Electric heating and temperature control equipment
• Motor soft-start and variable-speed drive systems
• Power distribution and switching panels
• Lighting and HVAC control

For general electrical safety standards and best practices when working with solid state relays and industrial switching components, refer to the OSHA Electrical Safety Guidelines.

Frequently Asked Questions

Q: What is the difference between a solid state relay and a mechanical relay?

A: A solid state relay (SSR) uses semiconductor switching components instead of mechanical contacts, resulting in silent operation, no arcing or sparking, faster switching speeds, and a much longer service life compared to traditional electromechanical relays. This makes SSRs ideal for high-cycle industrial applications.

Q: Do I need a heat sink with this industrial SSR?

A: Yes. If your actual operating current exceeds 5A, a properly rated heat sink is required. SSRs generate heat during operation, and without adequate thermal management, the relay's performance and longevity can be significantly reduced. Always match the heat sink to your current rating and ambient temperature.

Q: How do I choose the correct current rating (e.g., 60A vs. 200A vs. 400A)?

A: Select based on your actual load current with a safety margin. For resistive loads, choose a module rated at 2–2.5× your actual current. For inductive loads (motors, transformers, solenoids), use a module rated at 6–7× your actual current. This margin accounts for inrush currents and thermal stress during operation.

Q: Can this SSR be customized for specific applications?

A: Yes, custom configurations are available. Please contact our customer service team with your specific requirements, including current rating, voltage range, and any additional specifications you need.