COSEL Releases MH3 Series of DC/DC Converters

September 18, 2020


COSEL Releases MH3 Series of DC/DC Converters

COSEL released the MH3 series of high isolation DC/DC converters, targeting medical and industrial applications.

COSEL released the MH3 series of high isolation DC/DC converters, targeting medical and industrial applications.

Per a company release, the series has a reinforced insulation, sustains 3kVAC and 4.2kVAC isolation test in accordance to safety standards, and is transformer designed to sustain differential voltage that might happen in industrial applications.

As for medical applications, the series complies with the 2xMOOP (250VAC) (Means of Operator Protection) isolation requirement, as specified in the IEC60601-1 3rd edition standard.

Addressing both, medical and industrial applications, the MH3 series received the agency approvals: UL62368-1, EN62368-1, c-UL (equivalent to CAN/CSA-C22.2 No.62368-1), ANSI/AAMI ES60601-1, EN60601-1 3rd, c-UL (equivalent to CAN/CSA-C22.2 No.60601-1).

Key features per the same release include:

•          High input/output isolation 3kVAC, 4.2kVDC

•          Medical isolation 2MOOP - 250VAC working isolation voltage

•          Low input/output capacitance - 20 pF maximum

•          Ultra-wide input voltage 4.1 - 4.5V to 18V ; 9V to 36V ; 18V to 76V

•          Ruggedized pins connector

A built-in overcurrent protection circuit with automatic recovery is is also included, in addition to a remote-control pin operating as negative logic.

The pins are molded in an epoxy holder, strengthening the connections between the application PCB and the module.

The MH3 series can be operated within a temperature range of -40 to +85C ambient, 20 - 95%RH (Non-condensing). Depending on cooling, a power derating may apply to not exceed +105C at specified measuring point.

In an effort to reduce transfer noise, isolation capacity was reduced.

For more information, visit

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Perry Cohen, associate editor for Embedded Computing Design, is responsible for web content editing and creation in addition to podcast production. He also assists with the publication?s social media efforts which include strategic posting, follower engagement, and social media analysis. Before joining the ECD editorial team, Perry has been published on both local and national news platforms including (Phoenix), (Phoenix),, Cronkite News, and MLB/MiLB among others. Perry received a BA in Journalism from the Walter Cronkite School of Journalism and Mass Communications at Arizona State university. He can be reached by email at [email protected]. Follow Perry?s work and ECD content on his twitter account @pcohen21.

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