Mean Well TDR-480-24 Three-Phase DIN Rail Power Supply

480 W three-phase 24 V supply for heavier DC loads

The Mean Well TDR-480-24 is a three-phase DIN rail power supply that delivers 24 V DC at 20 A, which is 480 W. Mean Well describes the TDR-480 series as an economical slim 480 W family 85.5 mm wide, with an input of 340 to 550 VAC three-phase and dual-phase operation possible, built-in active PFC and efficiency up to 93%.

A three-phase input spreads the load across all conductors and suits panels where a single-phase 24 V supply of this size would unbalance the feeder. The 24 V model reaches 92.5% typical efficiency, runs from -30 to +70 C under free-air convection, and limits current in an overload before shutting down after 3 seconds. A DC OK relay contact is available as an option.

Technical specifications

Where three-phase input pays off

At 480 W the TDR-480-24 draws a typical 0.85 A at 400 VAC. For panels already fed with three-phase power, a three-phase supply avoids loading a single phase and removes the need to balance several single-phase supplies across the feeder. Mean Well lists industrial control systems, semiconductor fabrication equipment, factory automation and electro-mechanical apparatus as applications, and the 20 A output is typical for groups of valve manifolds, contactor coils, drives control boards and I/O racks.

Input, derating and protection details

The input is rated three-phase 340 to 550 VAC, and the datasheet allows dual-phase operation, so confirm the connection scheme in the manual before commissioning. Cold-start inrush is 50 A, so select upstream protection accordingly. Overload protection holds the output at its current limit and then shuts down after 3 seconds; the unit must be re-powered to recover. Derating applies at high temperature and low input voltage, and for altitudes above 2000 m. Leave the recommended clearance on each side because the supply relies on convection cooling. Measure all three phases after installation and check for a balanced draw, because a missing phase on the feeder will otherwise only show up as a shutdown under load.

Documents and quotation

The attached Mean Well datasheet covers the TDR-480 series with output ratings, derating curves, mechanical drawings and connection details. For a quotation, send the model code TDR-480-24, quantity, the supply voltage and frequency at the site, the load current including start-up peaks, the cabinet temperature and any approvals your project requires. Related items are listed under Power Modules.