Ruggedised, high-power AC/DC power supplies

September 09, 2013 // By Graham Prophet
These off-line power supply units are designed to withstand shock, vibration and extreme temperatures in physically challenging high-reliabilty application environments, at power rating of up to 1 kW.

Powerstax is a specialist provider of optimised power sources: its MC1U series comes in 400W (MC1U-6A), 700W (MC1U-6B) and 1000W (MC1U-6C) versions and supports a 47Hz to 440Hz input frequency range. You can use them as a plug and play solution with the output voltage adjusted as required using an integrated multi-turn potentiometer. Measuring 260 x 127 x 40 mm, power conversion efficiencies are up to 91%. The available input voltage range is 85 VAC to 264 VAC at 47 Hz to 63 Hz and 90 VAC to 120 VAC at 390 Hz to 440 Hz. These units can be combined with the company’s A3600 chassis in order to form 19-in. rack-mount solutions.

UL60950, CSA22.2 No.950 and EN60950 approved, as well as fully conforming to both MIL-STD-461F (for electromagnetic interference) and MIL-STD-810G (for shock and vibration) standards, the products in the MC1U series are targeted at implementation into military commercial-off-the-shelf (MIL-COTS) and other high reliability (high-rel) systems, such as marine/military communication, satellite guidance, avionics and radar. Over-current, over-voltage and inrush current protection mechanisms are incorporated, as well as thermal shutdown. They also have a 3000 VAC voltage isolation and an operational temperature range spanning -55ºC to 70ºC. A conformal coating on their exterior offers added protection against dust and liquid ingress.