Contact Us

SEIP’s normal business hours for Customer Service and Technical Support are from 6:30 A.M. to 5:00 P.M. PST Monday through Friday.

Mailing Address:
Sumitomo Electric Interconnect Products Inc.
915 Armorlite Drive
San Marcos, CA 92069-1440
United States

Phone and Fax Numbers:

Phone Number Fax Number Email
Customer Support (800) 758-3515 (800) 758-3517
SumiMark and Sumitag
Printer Technical Support
(760) 761-0600
ext. 203
Technical Support
Sumitube Products (800) 758-3515 (800) 758-3517
SumiMark Tubing Products (800) 758-3515 (800) 758-3517
Sumitube STS Products (800) 758-3515 (800) 758-3517
Poreflon Products (800) 758-3515 (800) 758-3517
Sales Representative Please contact your nearest representative by calling (800) 758-3515, or visit our Representative locator page.


Global Network:

Japan Sumitomo Electric Industries, Ltd.
Address 4-5-33, Kitahama, Chuo-ku, Osaka 541-0041, Japan
Tel. +81-6-6220-4280
Fax. +81-6-6222-6489


USA Sumitomo Electric Interconnect Products, Inc.
Address 915 Armorlite Drive San Marcos, CA92069, U.S.A.
Tel. +1-760-761-0600
Fax. +1-760-761-0620


Germany SEI Interconnect Products (Europe), Ltd.
Address Oststrasse 89, D-22844, Norderstedt, Germany
Tel. +49-40-526-501-60
Fax. +49-40-526-501-69
SUMITOMO ELECTRIC Schrumpf-Produkte GmbH


China Sumitomo Electric (Shanghai) Electronics, Ltd.
Address Room 3108, Shanghai International Trade Center 2201,
Yan An Road (W), Chang Ning District, Shanghai, China
Tel. +86-21-6219-5959
Fax. +86-21-6219-5689
Sumitomo Electric (Shanghai) Electronics, Ltd. ShenZhen Branch
Address Room 1506-09, International Chamber of Commerce tower, No.168,
Fuhua Rd3, Futian CBD, Shenzhen, Guangdong, China
Tel. +86-755-8278-6655
Fax. +86-755-8278-6650


Taiwan Sumitomo Electric Interconnect Products(Hong Kong), Ltd. Taiwan Branch
Address 30/F., No.99, Tunnan Tower, Sec. 2, Dunhua S. Rd., Da-an District,Taipei 106, Taiwan (R.O.C.)
Tel. +886-2-2325-2588
Fax. +886-2-2325-3698
Sumi-Pac Corp.


Singapore Sumitomo Electric Asia Pacific Pte. Ltd.
Address 31 International Business Park, #02-10, Singapore 609921
Tel. +65-6261-3388
Fax. +65-6266-7165


Thailand Sumitomo Electric (Thailand) Ltd.
Address 15th Floor, B.B. Building, No. 54 Sukhumvit 21 Road,North Klongtoey, Wattana, Bangkok 10110, Thailand
Tel. +66-2260-7231
Fax. +66-2260-7230


Korea Sumitomo Electric (Korea) Electronics, Ltd.
Address 14F Gyeongwon Bldg., 340 Gangnam-daero, Gangnam-gu,Seoul, 135-936, Korea
Tel. +82-2-3453-4511
Fax. +82-2-3453-4507


India SEI Trading India Pvt. Ltd.
Address 802, Vatika City Point, M G Road, Gurgaon, Haryana, 122002, India
Tel. +91-124-4577470


For any information please Contact Us

Sumitomo Electric Interconnect Products, Inc.
915 Armorlite Drive, San Marcos, CA 92069

T: (760) 761.0600

World leaders in identification
and heat-shrink technology

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