They are conduction-cooled units developed by Martek in response to an increase in applications where the power supply is mounted inside a sealed enclosure.
Originally designed for on-board passenger information systems, JL DC/DC converters are rated up to 50W and offer full EN50155 compliance as well as the ability to accept the wide range of typical railway input voltages. Outputs can be specified between 5 and 110Vdc and the units have a footprint of just 135 x 85mm including the mounting plate.
With efficiencies approaching 90%, the conduction cooled versions help to minimize any temperature rise within the host equipment. All converters in the JL Series are designed for continuous operation at ambient temperatures of up to 75°C without de-rating.
