Sumitomo Electric Interconnect Products (M) Sdn. Bhd. (SEPM) was established in March 1988 as a Malaysian subsidiary of Sumitomo Electric Industries, Ltd., Japan. The public company profile on the legacy site describes a manufacturing campus of approximately 59,003 m² with roughly 31,277 m² of built-up area across six factories designated M1–M6, employing about 906 people.

That footprint sits in Kawasan Perindustrian Tebrau II, Johor Bahru — a location the site has occupied since 1993, when Flexible Flat Cable (FFC) production began in the M1 plant. The following decades added irradiated wires, high-voltage constructions, gold plating, and automotive-related cable lines such as steering cable and HEV wire.

Where SEPM sits in the Sumitomo Electric Group

SEPM positions itself within the Sumitomo Electric Group’s interconnect products business. Corporate philosophy materials on the archive reference the broader Sumitomo Spirit — integrity, sound management, and long-term societal trust — rather than short-cycle promotional claims. This guide summarises publicly described manufacturing capabilities; it does not replace official Sumitomo Electric documentation or your account manager’s specifications.

What the plant is known for

Flat components — SUMI-CARD™ FFC families, shielded and Au-plated options, and jumper leads for dynamic routing.
Electronic wires — UL- and CSA-recognised insulated wires, SUMIFLEX™ flexible PVC constructions, and IRRAX™ irradiated wire ranges.
Automotive interconnect — milestones covering automotive wire, steering cable for airbag applications, and HEV wire production.

How to use this site

SEPM Guide rewrites archived public information into clearer product and process explanations. Use the products section for division overviews, the history page for certification and capacity milestones, and contact for the published Tebrau II phones and fax — not an automated enquiry form.