About Us

About Us

Founder Story

Shi Yongjun

● Founder of Shenzhen ZENITHSUN Electronics Tech. Co., Ltd.
● President, Chief Engineer.
● Engage in resistor industry management and design for 30 years.

● Continuously undertake various military and civil projects for CAMI, and lead the successful design and production of a total installed capacity of 2.4MW high-power test load resistor system for CAMI, which is used as an accessory test load for the electromagnetic gun launching facility of the Chinese Navy aircraft carrier (a confidential project).
● Leading the design and production of 10000A water-cooled high power load test system for the China Electric Power Research Institute for the experimental testing of remote DC transmission system (a major national scientific research project).


● Leading the successful development of high-power special chopper resistors for CRRC, used in the Navy's unmanned submarine anti-sonar monitoring, tracking and searching for enemy aircraft carriers and other ship data and intelligence information (a classified project).
●Leading the design 3000A high current, 150KV insulation withstand voltage test large load for China Aerodynamic Research and Development Center, for military test engineering project equipment testing.
● Leading the design all kinds of high-power load test system for the China Shipbuilding Industry Corporation 705, 706, 711, etc. , used in the Navy's large ships and large defense system experimental testing.
● Leading the design of special non-inductive high-voltage 150KV test loads for the Shenzhen Aerospace Science and Technology Innovation Research Institute for the power supply test of the space launch system.
● Leading successfully customized 10000A, 15000A multi-terminal combination of adjustable load bank for TUV , for testing new energy charging pile system testing equipment testing.
● Possesses 1 invention patent and 10 utility model patents.
● Leading the design of various large-scale state-owned enterprises, central enterprises, as well as the military, aviation field and domestic and foreign major product design projects, ect.

Exported Countries


Years of Experience


Oversea Customers


Patented Manufacturing


Zenithsun Introduction

Shenzhen Zenithsun Electronics Tech. Co., Ltd. was founded in 2004,it is one of the first manufacturers of power resistors and load banks with international competitiveness in China. It is a national high-tech enterprise and Shenzhen specialized, special & new enterprise. The production plant covers an area of 8000 square meters. It has set up three production workshops of load banks, power resistors and high-voltage non- inductive thick film resistors. One of the first enterprises in the industry to implement ISO 9001 and IATF16949 international quality management system standards,with nearly 30 years of professional R&D experience and market and service experience.
After 18 years of unremitting efforts, the company has become one of the world's top 500,China's top 500 & many well-known brand suppliers,serving nearly 4000 customers at home and abroad.
Products are exported to 56 countries and regions such as Europe, North America, South America, and Asia,ect,covering industrial control,braking and equipment fields such as new energy vehicles,wind power generation,photovoltaic power generation, rail transit,frequency converters,servo,CNC, elevators,robots,power supplies,ships and docks; The fields of military industry,aviation,data center, communication,telecommunications,universities,colleges and research institutes, etc.
After nearly 20 years of struggle, ZENITHSUN has integrated with its customers and suppliers with its humanistic feelings, social responsibility,craftsman spirit,and has also achieved customer satisfaction,employee satisfaction and social satisfaction.

Production & Manufacturing Team

With our strong and experienced production and manufacturing team, we are committed to assisting customers throughout the entire process
from product design and development to mass production. Our team has the skills and expertise needed to turn your ideas into reality and ensure successful production.
ZENITHSUN has multiple production lines for brake resistor ,wirewound resistor,power resistor,high voltage resistors,load banks as well as corresponding
production teams, to complete production, assembly,package and other production processes.


International Service Team

Our experts are here to provide guidance and support in the procurement of brake resistors, power resistors, wirewound resistors, high voltage resistors, and load banks.
With their knowledge and industry experience, they will assist you in making the optimal choice to meet your manufacturing needs both now and in the future.


Our Corporate Culture


✧ Become the benchmark of China's power resistor industry.
✧ To be a high quality supplier of the world's top 500 companies.


✧ Provide global customers with high-quality Power Resistors & Load Banks.


✧ Quality is Life.
✧ Product is Character!


✧ School Culture
✧ Military Culture
✧ Family culture

Company History

Since founded in 1999, over 100 PSA Plants, including the world's largest units-single set of VPSA-CO and VPSA-O2 equipments, have been designed and supplied by PIONEER.