Emerson Expands 1U Switcher Family by Adding 24V Output for High-Density Distributed Architecture Applications

Emerson Network Power has expanded its popular Astec NTS Series family of 350W bulk ac-dc switching power supplies to include new 24V output configurations. Available with convection cooling or optional forced-air, the compact units are designed for use in distributed power architecture configurations. The new NTS355 models feature a compact 4" x 7" footprint to achieve a high-density 8.3W per cubic inch. The convection-cooled configuration provides 200W for 1U (1.75-inch high) rack-mount chassis and other low-profile applications, while the fan-cooled option supplies the full rated output up to 50°C with 30 CFM forced air. For added flexibility, the units can be set up for lengthwise or crosswise airflow.

Operating at 85% efficiency, the devices incorporate active power factor correction to minimize input harmonic distortion and the switchers accept input from 85-264Vac or 120-320Vdc. Also suited for use as ac-dc front ends for dc-dc converters, the units can be used in a wide variety of applications including telecommunications, networking, test and measurement, single-board computers and gigabit Ethernet devices. A built-in Or-ing diode eliminates the need for external circuitry when using the device in a redundant configuration. The units also include a 12V 1A auxiliary output and 5V at 2A standby output as well as overload, over-voltage and thermal protection.

All models in the Astec NTS350 Series incorporate built-in Class B EMI filtering, remote sense, remote inhibit and single-wire parallel on the primary output that enables current-sharing to balance loads. With an operating temperature range of zero to 50°C without derating, the units can function up to 70°C by derating the output 2.5% per °C. They comply with IEC EN61000-3-2 harmonic and IEC EN61000-4-X susceptibility standards.

Available now, pricing starts at $299 in OEM quantities.