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Marusan Electronics is a specialist manufacturer of industrial heat sinks founded in 1963. LEX heat sinks feature high precision and efficiency, and we ensure complete quality management both for our catalogue items and custom-made items: quality management right from design and development, to the acceptance of raw materials, to precision processing, surface finishing, detailed inspection, through to packing and shipping.
We have acquired international standard certification in the form of both quality and environmental ISO certificates.
In addition, in recent years we have reinforced our services, including assembly services, based on the catch call of “one-stop support.” Moreover, we provide further value-added with our thermal analysis, using special thermal analysis software and real-time measurements.
LEX MARUSAN is a heat countermeasures brand you can trust for both quality and environmental friendliness.

Company Outline

Trade Name Marusan Electronics Co., Ltd.
Addresses Head Office: 3-9-2 Sotokanda, Chiyoda-ku, Tokyo
Saitama Sales Office: 581-8 Oaza Kodaya, Moroyama-machi, Iruma-gun, Saitama
Saitama Factory: 581-5 Oaza Kodaya, Moroyama-machi, Iruma-gun, Saitama
Established July 6, 1963
Capital 70,000,000 yen (as of February 2012)
Representative President and Representative Director: Mika Takemura
Company Business Manufacture and sales of parts for electric and electronic devices
LEX heat sinks (for semiconductor elements)
Non-ferrous aluminum processed parts

In-house Facilities

Facility name Manufacturer / Machine name Facility ability/processing scope, etc.
Fully automatic cutter TSUNE SEIKI / TK2M-16G H90 x W600
Fully automatic cutter TSUNE SEIKI / TK2M-2060G H200 x W600
Machining Center Mori Seiki / NV5000α X800 x Y500
Machining Center Mori Seiki / NV5000 X800 x Y500
Machining Center Mori Seiki / MV40M X500 x Y400
Self Center Sugino Machine / SCU-822 TE X300 x Y250
CAM software FACT / FeatureCAM Software equipment
Thermal analysis software ANSYS / Icepak Software equipment
Air leak tester ATEQ / F520 100 kPa
Air leak tester ATEQ / MF520 900 kPa
Medium cleaner TAISEI CLEAN CHEMICAL / M-HBU400 250 x 400
Large cleaner TAISEI CLEAN CHEMICAL / M-HU600 500 x 600
Three-dimensional measuring machine TOKYO SEIMITSU / DuraMax X500 x Y500 x Z500

Download catalogue here

We apologize, but are unable to accept telephone inquiries.
General-use heat sinks
Heat sinks for printed circuit boards
Forced air/water cooling style heat sinks
Go here for inquiries