About Us

Coil Winding Specialist or CWS started as a design center for custom inductors, chokes, and transformers in the early 1980s in California.

Today, CWS is still based in California staffed with professional engineers trained in power electronics and magnetics.

Coil Winding Specialist has very modern manufacturing facilities in the U.S. and China. CWS has IS0 9001:2008 Certified Quality Management System in place.

Our China manufacturing partner, DongGuan DongKeng Para Manufacturing Company, ISO 9001:2008 registered, is located in Dong Guan, Guang Dong Province. It has over 60,000 sq ft, state-of-the-art manufacturing facility, and employs over 230 people.

CWS provides full service from design, prototyping, pre-production run to volume production. Our engineers have combined more than 40 years of experience in designing and manufacturing of magnetic components such as inductor, choke, coil and transformer for various applications ranging from medical to military applications. These inductor, choke, coil, and transformer are designed with ferrites, iron powder, MPP, sendust or high flux cores in all shapes and sizes. Please go to " Design Consulting" to review our engineers background and experience.

Most designs, prototyping and pre-productions of inductors, chokes and transformers are done at our facility in Orange, California. Volume productions are done at our ISO 9001 manufacturing facility in China. Since the prototyping and pre-productions are done in Orange, CA we can offer our customer the fastest delivery for prototypes and lower volume pre-production requirements where lead times are extremely important. Typical delivery from design to pre-production is ranging from 2 days to 2 weeks. For those products manufactured in the U.S., the cost will naturally be higher, but delivery time is very short. For high volume production, our prices are one of the most competitive in the market place. Our prices are factory direct with very low overhead so that we can pass the savings to our customers. For volume productions, we will beat our competitor's prices. Most of our business come from referrals from our satisfied customers.

Our team of experts can help you with your entire coil winding, inductor, choke, coil and transformer designing needs. We will wind anything per your requirements. We have the capabilities to verify your designs, test your ideas and concepts, as well as build your magnetic products to your specifications. We welcome your samples and will manufacture according to your sample configurations to match its performance and specifications.

We are competitive with any of the inductor or chokes manufactured by Coilcraft, Pulse, Renco, Taiyo Yuden, TDK, Toko, Wilco, Coiltronics, Gowanda, JW Miller, Frontier, Delevan, ACT, Murata Erie. Many of the products supplied by these companies are manufactured by similar factories in Asia.The Quality Assurance/Control systems are similar and we guarantee the quality of our products to be as good or even better than our competitors. In addition, we will lower your cost as our overhead is much lower than our competitors. Most importantly, we will deliver the products to you on time, every time.

We have over 50,000 types of raw materials to select from when making a coil, choke, inductor, transformer or antenna. We build surface mount and through hole type products. We have in stock every imaginable wire types and gauges to wind anything for you.

We have both manual equipment and sophisticated winding machines to handle any job, large or small. Our operators are specially selected and trained for winding delicate and extremely thin wires on miniature cores. We have other operators who have been specially trained to manually wind heavy gauge wires. For example, our 5Kw to 10Kw, 3 to 30 MHz transmissions line transformer uses AWG 10 wires with Teflon sleeve, are extremely difficult to wind, but we wind them all!

Our sophisticated instruments have the ability to test and measure all parameters from DC to 1 GHz. Some of our equipment are custom designed to test specific parameters such as flux density, permeability of materials, B-H curves, DC bias, etc.

We can varnish, vacuum impregnate, and encapsulate your entire winding jobs. We use soft epoxy materials to ensure that the stress on the cores is minimized to maintain its inductance, Q, and losses.

Please e-mail or fax us your product specifications requirements or for any other inquiry.