Tel : 02-312-1655, 02-752-5051-2|


The restructuring of a previous company resulted in the establishment of E.S. INTERNATIONAL in 1991. The company has been manufacturing MV switchboards of up to 33kV and LV switchboards of up to 6000A for more than 24 years. The management team comprises by skilled engineers with at least 15 years of experience in design and manufacturing of switchboards.


The cubicles are entirely manufactured in house by the use of modern facilities such as CNC punching machines, or the new electrostatic powder oating system. Assembly of the switchboards meet IEC and VDE standards and they are type tested by the VDE Germany, in conformity with IEC 60439-1 standards. The quality management system of ESI was successfully certified in 2003 according to ISO 9001:2008

Customers can thus be assured that products from E.S International comply with international standards and of the highest quality.

ESI TRADING CO.,LTD. Was founded in 1995. The company imports mainly from medium sized European companies, who manufacture high quality roducts at reasonable prices. The company is the sole distributor for SACI, Spain (measuring instruments), JANITZA , Germany (energy of PF controller) SCHMIDT, Germany (busbar holders), DF, Spain (fuse) and KUNZ, Germany (flexible copper connector).

In 1997, ESI Trading was also appointed as distributor for SIEMENS in Thailand, which enables the company to offer a complete range of electrical products needed by switchboard manufacturers and contractors.

ESIT focuses solely on the distribution of products which are also used by the production division of E.S.INTERNATIONAL. Due to this experience with the products, ESIT can advice their customers in the best possible way.


1 is situated in Bangplee area near the new Bangkok International Airport.
 2 More than 20 experienced sales and project engineers are responsible for planning, designs and estimating to support namufacturing.
3 Hydraulic shearing and bending machines are used to manufacuture the cubicle enclosures form electrogalvanized metal sheets.
4 CNC punching manchines are computerized to ensure the reproducibility shapes and dimensions of the metal work.
5 Skilled electricians install the switchgear and control wiring.
6 Each switchboard undergoes extensive factory test and quality control before being delivered to the customers.