Amtex Electronics announces availability of its 500 W active filter unit for use in harsh electrical environments. The DSF500 is designed to protect DC-to-DC converters from the surges, spikes and ripples that are typically found on the electrical system of any military platform, such as an aircraft or vehicle. The company says the filter meets the military specification, MIL-STD 1275A-D, without the need to incorporate any additional components.

The DSF500’s low loss, MOSFET-based protection circuit ensures that the unit can provide continuous reverse voltage protection. Attached systems are protected from incorrect, potentially damaging, electrical supply connections. The filter also protects against over current conditions. Should the demand exceed 28 A, a warning signal is given that can be used either to disable the DSF500 or turn off the attached devices in order to reduce the current.  

The unit measures 57.90 by 57.90 by 16.45 mm. The company says it believes no other competitor produces an active filter in such a small package that meets MIL-STD 1275A-D and can deliver 28 A. Compliance to electro-magnetic immunity MIL-STD 461E specification can also be achieved by addition of the FSO461.