Shijiazhuang Tonghe Electronics Co.,Ltd. (Hereafter referred to as Tonghe) is a high technology enterprise, which specializes in high frequency switching power supply and related products. Tonghe, as high tech and software enterprise, is approved by government and provides comprehensive and competitive power solutions for customers, which is highlighted in national power grid construction and renovation projects.

As the ISO9001 and ISO14001 certified manufacturer since 1998, we focus on high-frequency switching power supply for 14 years based on our own patent technology " resonance voltage dual loop control power transformation ", which is recognized as internationally advanced level because it make the DC power module higher efficiency(over 95%), smaller size, less failure rate. Tonghe is currently the only one in China that implements the soft switch in all range with his patent technology.

Tonghe products cover more than 100 models in 8 series, which involves:
electric power networks DC
telecom DC power supply
EV charging power
EV on-board DC-DC
railway DC power
EPS DC power
broadcast transmitter DC power
vessel DC power
we also have models for special type DC power, experiments DC power, and military DC power.

Powerful R & D departments with total 60 engineers, 4 advanced labs supported by the local government, over 20 QC members team covering IQC, IPQC, FQC, OQC process, professional sales and after-sales support team, all these can totally guarantee the most reliable quality and high standards products to our customers.
also we have CE, RoHS and FCC approval for most of our DC power models, which we promise one year warranty.

Currently we rank the second in China market after Emerson power, and our oversea customers include India Rajasthan power plant, Malaysia Bintulu power plant, Bangladesh Khulna power plant, India Jurala power station ect

R&D Capability
As the key center of product reaching and development, the technique department has employees, among which are more than 60 experienced designers. They already got two invention patents and three Utility Model Patents. A few patent applications are currently in process.

In last ten years, the technique department is market-oriented and set up dozen of research topics each year. The technical investment accounts for more than 10% of sales turnover, which guarantee product innovation and the continuable development of the company.

Production Capacity
The production department focuses on the customers' demand and creates scientific production technique and better quality management system. The average satisfaction on product quality, timely delivery is over 95%. What the customers concern are guaranteed. We bring advanced equipments for more variety and quality, which the same time improve the efficiency. The production routing time, take 10A model for example, is about 4.8 minutes,
Our annual capacity is over 60,000 sets with fist-phase production area of 4000 Square meter, the second-phase production area of 5000 Square meter is under construction with annual capacity of 120 000 sets.