Mean Well 26 A — 360 W Industrial AC/DC Power Supply (13.8 V)

Mean Well 26 A — 360 W Industrial AC/DC Power Supply (13.8 V)

This PSU from Mean Well is an industrial-grade AC/DC power supply delivering a stable 13.8 V DC output at up to 26 A continuous. It is engineered for professional and industrial environments where electrical robustness, predictable behavior under load, and long-term reliability are required.

Electrical Overview

This supply operates from a universal mains input ranging from 90 to 264 VAC at 47–63 Hz and also supports high-voltage DC input from 127 to 370 VDC. The regulated 13.8 V output is adjustable between approximately 11.5 V and 15 V, allowing compensation for cable losses or downstream distribution.

Rated output power is 359 W continuous, with peak capability up to approximately 450 W under short-duration load conditions. Output ripple and noise are specified at a maximum of 150 mVp-p, measured with a 20 MHz bandwidth, ensuring suitability for sensitive RF and communication equipment.

Line regulation is specified within ±0.5 %, load regulation within ±2 %, and overall voltage tolerance within ±1 %. Typical efficiency is approximately 91 % at full load, with active PFC achieving a power factor greater than 0.98 at 115 VAC and greater than 0.95 at 230 VAC.

Protection & Operating Limits

Overload protection operates in constant current limiting mode between roughly 110 % and 125 % of rated output power, with automatic recovery once the overload condition is removed. Short-circuit protection is also implemented using constant current limiting with auto-recovery.

Over-voltage protection shuts down the output when the voltage exceeds the specified threshold, requiring power cycling to recover. Over-temperature protection disables the output until the internal temperature returns to a safe operating range.

Inrush current is typically 60 A at 230 VAC during cold start. Leakage current is below 3.5 mA at 240 VAC, and no-load power consumption is less than 0.5 W, meeting Level VI energy efficiency requirements.

This is a fixed-output industrial supply, not an adjustable laboratory power source.

Mechanical & Thermal Design

This PSU is housed in a fully enclosed metal chassis with forced-air cooling. It is specified for operation from −30 °C up to +70 °C, with thermal derating above 50 °C under free-air convection conditions.

The enclosure dimensions are approximately 192 × 178 × 45.5 mm, with a unit weight of about 1.5 kg. DC output is provided via a four-position terminal block using two positive and two negative terminals, suitable for wire cross-sections from 0.5 to 4.0 mm². Isolation between input and output is rated at 3 kVAC.

Typical calculated MTBF exceeds 1 million hours according to Telcordia SR-332, supporting long-term continuous operation in permanently installed systems.