Ningbo Zettler Electronics Co., Ltd.
Ningbo Zettler Electronics Co., Ltd.
Trusted Relays Manufacturing Company

Advanced testing technology and testing equipment to further improve the accuracy and reliability of testing, promote the further improvement of the testing level, and provide a strong guarantee for product development and design.


Rich experience in R&D, production and sales, advanced equipment, high-quality technical personnel and experienced management personnel.


Our company has always adhered to the business policy of "customer-oriented, winning by quality", and has successively passed ISO9001, IATF16949, ISO45001, ISO14001 standard certification.

Company Profile

Jintian (JT) proudly stands as a pioneering joint venture entity located in Yuyao, Zhejiang, China. Our esteemed status as a high-tech enterprise was solidified in 2010, underscoring our commitment to innovation and excellence. The illustrious "Jintian" brand has been hailed as a distinguished provincial trademark, symbolizing our unwavering dedication to quality and distinction.

The inception of "Ningbo Jintian Relay Co., Ltd." in August 2000 marked the genesis of a legacy that would later evolve into "Ningbo Zettler Electronics Co., Ltd." in 2005. Since our transformation, we have proudly served as the premier OEM facility for esteemed partners such as Hongfa Groups and Zettler Groups, elevating production standards and setting new benchmarks in the industry. With a diverse portfolio boasting over 500 relay variants spanning power, solar, automotive, and industrial control sectors, our manufacturing prowess has propelled us to a production capacity of 180 million units, with sales figures exceeding a remarkable 350 million yuan.

Spanning an impressive 30-acre expanse, our facilities encompass a sprawling plant area of 22,000 square meters, a testament to our unwavering commitment to operational excellence and efficiency. Our products, renowned for their superior quality and reliability, are exported to a vast network of over 20 countries and regions, including key markets such as the United States, Germany, and Italy. Our esteemed clientele includes industry giants like Gree, Midea, Haier, Chint, and Huawei domestically, while internationally, we cater to renowned names such as SIG, Emerson, Mars, Siemens, Flextronics, and Tahoe, among others.

Relay Manufacturer
180 Million

Production Capacity 


Established in

Over 350 Million RMB

Sales Amount

22,000 Square Meters

Existing Plant Area

Technical Help

Our company actively implements advanced quality concepts. From material to manufacturing process, from finished product to shipment, each process is managed by the PDCA cycle model, through daily audits and centralized internal audits, and full action throughout the process , Continuous cyclical improvement, to promote the company's management process to be more standardized, and enhance customer satisfaction.

Relay Supplier

Research & Development

The Testing Center of Ningbo Zettler Electronics Co., Ltd., established in 2010, spans approximately 1,000 square meters and is staffed by a team of proficient testing professionals. Adhering strictly to the guidelines outlined in GB/T21711.1 and IEC61810-7 standards, all testing procedures are meticulously executed to ensure precision and compliance.

Aligned with the stringent requirements set forth in "GB/T 15481-2000 General requirements for the competence of calibration and inspection laboratories" idt "ISO/IEC17025:2017 General requirements for the competence of testing and calibration laboratories," the Testing Center has meticulously crafted a comprehensive suite of quality system and procedural documents. This dedication to excellence has been duly recognized through accreditations from esteemed bodies such as the TUV safety certification laboratory and UL safety certification laboratory.

Following two successive expansions, the Testing Center now boasts a diverse array of testing capabilities. Equipped with cutting-edge facilities including electrical life test benches, mechanical life test benches, glow wire testers, roughness testers, ball pressure testers, needle flame testers, grinding and polishing machines, salt spray testers, high and low-temperature impact test chambers, hardness testers, ROHS testers, and an assortment of other precision measuring and testing apparatus, the center stands as a beacon of technological advancement and operational proficiency.

Looking ahead, the Testing Center remains steadfast in its commitment to integrating state-of-the-art testing methodologies and equipment to enhance the accuracy and reliability of testing procedures. By continually elevating the standards of testing excellence, the center aims to fortify the quality assurance framework, thereby underpinning product development and design initiatives with a robust foundation of reliability and precision.

Relay Factory
Latest News & Blogs about Relays