Seoyon Electronics Co., Ltd. (Formerly Daedong Co., Ltd.)

Company Profile



100, Saneop-ro 156beon-gil, Gwonseon-gu, Suwon-si, Gyeonggi-do, Korea

Business Overview

-The Company specializes in manufacturing vehicle switches and key sets.

-In January 2016, the original company Daedong Co., Ltd., adopted Seoyon Electronics Co., Ltd. as its new name.

-In the fiscal year that ended in December 2017, 66.3% of the Company’s sales were to the Hyundai Motor Group, while exports accounted for 28.5% of sales.


(As of Dec. 31, 2018)

Major Shareholders Interest Ratio (%)
MOBASE 50.12
Others 49.88
Total 100.00


Securities systems
-Smart key systems
-Immobilizer systems
-Key sets

Electronic Control Systems
-Body control modules (BCM)
-Power seat modules (PSM)
-Steering Column Modules (SCM)
-Integrated Body Control Units (IBU)
-Cold/Heated cup holders

-Power windows switches
-Steering wheel remocon switches
-Multi function switches
-Instrument panel switches

Convenience Control Systems
-Cold / Heated Cup Holders
-Multi-Input Device

Power Control Systems
-Low Voltage DC-DC Converters (LDC)
-DC-DC Converters
-1.5kW Inverters
-Battery Management System (BMS)

Lightweight materials
Steering rock housing
-Steering wheel
-Seet rrame
-Radiator Panel for LED
-Radio Casing


Jan. 1978 Shin Chang Electrics Corp. was established.
Sep. 1978 Technical tie-up with Tokai Rika Co., Ltd. in Japan
Dec. 1985 Capital participation by Tokai Rika Co., Ltd.
Feb. 1986 Korea Huf Co., Ltd. was established as a joint venture with Huelsbeck & Fuerst GmbH & Co., KG. of Germany.
Aug. 1989 Opened R&D Center
Jan. 1993 Acquired 100% of the shares in Korea Huf Co., Ltd. and changed the company name to U-Chang Precision Co., Ltd.
Mar. 1994 Established Guizhou Hua Chang Automobile Electrics Co., Ltd. in China.
Oct. 1994 The Company's stock was listed on the KOSDAQ market.
Dec. 1994 Established Shinchang Connector Co., Ltd. (SRC production) jointly with Furukawa Electric Co., Ltd. and Tokai Rika Co., Ltd. in Japan.
Jun. 1997 Established Shinchang Zpzp Polska Sp.Zo.o (Shinchang-Poland) jointly with Poland Daewoo FSO.
Oct. 1997 Acquired QS9000
May 2000 Technical Tie-ups with Robert Bosch of Germany
Feb. 2002 Acquired ISO14001
Jul. 2002 The Company and Guizhou Hua Chang Automobile Electrics Co., Ltd. concluded a technical partnership agreement, under which the Company will transfer its technology to the Chinese company.
Oct. 2002 Established STF Co., Ltd. in Korea with Tokai Rika Co., Ltd. and Furukawa Electric Co., Ltd.
Oct. 2003 Established Suzhou Huachang Mechanical and Electrical Co., Ltd. in Suzhou, Jangshu Province, China with Guizhou Guihang Automotive Components Co., Ltd. (China), Tokai Rika Co., Ltd. (Japan), U-chang Precision Co., Ltd. (Korea)
Apr. 2004 Acquired ISO/TS16949
Mar. 2005 Established Shinchang America Corporation in Michigan, USA
Oct. 2007 Established Shinchang Poland Sp. z.o.o in Poland
Jul. 2008 Established Suzhou Shinchang Science & Technology Co., Ltd. in China
Apr. 2011 Relocated the R&D Center to Seoul.
Dec. 2011 Hanil E-Hwa Co., Ltd. acquired 50.12 percent of the shares in Shinchang Electrics Co., Ltd.
Aug. 2012 Adopted a new corporate name, Daedong Co., Ltd.
Jan. 2016 Renamed Daedong Co., Ltd. to Seoyon Electronics Co., Ltd.
Mar. 2016 Relocated the R&D Center from Seoul to Anyang, within the Seoyon R&D Center.
Sep. 2016 Acquired the stock shares in its subsidiary STF and merged the operations.
Nov. 2016 Relocated the head office from Ansan to Suwon.
Oct. 2017 Established Seoyon Electronics India Private Limited in India.
Jun. 2018 Established Seoyon Electronics Mexico S. de R.L. de C.V. in Mexico.

Supplemental Information 1