Aavid / Boyd

A world leader in custom heat sinks including copper and aluminum board level heat sinks, heat sinks for BGA and CPU devices, extrusion profiles, liquid cold plates, heat pipes, heat sink interface materials, and custom value added assemblies. Boyd is a global leader in environmental sealing and thermal solutions.


Cosel is one of the world's leading power supply manufacturers offering high-quality, ultra small size AC-DC power supplies,DC-DC converters offering state-of-the-art technologies.


Standard and custom. Commercial and MIL spec. common mode chokes, surface mount and power inductors, current sensing, Coils, Helix Bandpass Filters and Planar Magnetics

Haydon Kerk/Pittman/Ametek

Pittman is a division of Ametek focusing on brush and brushless DC servo motors and drives. Pittman also offers a full range of motor options including gear boxes, integrated controllers, brakes and encoders. Haydon Kerk is a world leader in linear motion products including linear actuators, rail systems, and precision lead screws.


Since 1890 Hoyt has been a leading manufacturer of Analog and Digital meters for all applications . Hoyt now offers Test equipment from Hioki. Controllers, Power Monitors and Transducers.

Johnson Electric

Featuring Ledex/Dormeyer solenoids, and actuators, Johnson Electric, and Saia Burgess stepper and synchronous motors, Saia Burgess and th Contact switches (snap-action, momentary, panel mount, and IP rated). Parlex Brand - Flex Cable and Circuits.


Marlow develops and manufactures thermoelectric modules for the aerospace, defense, telecom, medical, automotive, power generation and other markets.


Nichicon is the world leader in Aluminum Electrolytic Capacitors, Film and Double Layer capacitors.


NorComp is a leader in design, worldwide manufacture, & marketing of I/O interconnect products, offering a wide range of premium high reliability connectors.

Okaya Electric

Okaya Electric is a world wide leader in LCD displays and noise suppression components.

Orion Fans

Orion Fans is a worldwide producer of high-quality, cost-effective standard and custom AC & DC cooling fans, assemblies and accessories.

OSI Electronics

Contract Manufacturing, Cable assemblies and Design Solutions.


SCHROFF Equipment Protection is a leading provider of VME and ATCA Systems as well as front panels, subracks, card-loks, packaging hardware, and cabinets. Product lines also include the Calmark/Birtcher family of board retention products.


Transformer Specialists-Commercial, Medical, Audio, Toroidal Transformers.


RCD has been a key manufacturer of standard and custom Resistors, Capacitors, Coils, Delay Lines for over 40 years. RCD’s USA plant is the home of the SWIFT™ program, and also specializes in military, aerospace and custom/specialty products. Caribbean and Asian facilities are geared for medium to high volume production, helping to ensure the industries most competitive pricing.


Power Entry Modules, Block/Line Filters, Switches, Fuses, Circuit Breakers, Cordsets, Connectors, Fuseholders, and Test Jacks.


Ferrite Based Magnetics, Custom Magnetic Solutions.


Selmark Associates, Inc.
100 Medway Road Suite 402
Milford, MA 01757

Phone: (508) 478-9088
Fax: (508) 478-5145
E-Mail: salesin@selmark.com

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Home National Building
Our main offices are located in the Home National Building in Milford.