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Application Note: Hand Soldering Guidelines for VPT DC-DC Converters and Accessory Products

May 11, 2023
VPT, Inc., a HEICO company, is dedicated to the highest level of quality. With expert, experienced personnel, state-of-the-art technology, and strict quality procedures, VPT produces reliable power supply products fordemanding avionics.

VPT, Inc., a HEICO company, is dedicated to the highest level of quality. With expert, experienced personnel, state-of-the-art technology, and strict quality procedures, VPT produces reliable power supply products for the demanding environments of avionics, military, and space environments.

VPT’s hybrid thick-film DC-DC converters and accessory products are hermetically sealed to keep moisture and/or contaminants from entering the package cavity. Products of this type use a projection weld or seam weld process to create the hermetic seal between the lid and the package body. Depending on lead (pin) diameter/length and package configuration, products of this type will use either a matched or compression glass or brazed ceramic disc to create a hermetic seal between the lead and package body. This glass or ceramic seal also serves the dual purpose of electrically isolating the lead from the package body.

VPT Series metal-packaged, hi-rel COTS DC-DC converters and accessory products are internally conformal coated and housed in a six-sided non-hermetic rugged metal enclosure to reduce moisture and contamination from entering the package cavity. Products of this type use a non-electrically conductive isolator to create a seal between the lead and package body. This isolator also serves the dual purpose of electrically isolating the lead from the package body.

These products should not be exposed to aqueous cleaning systems to avoid moisture ingress into the package that could potentially cause catastrophic failure.