Company Profile

About Coilmaster Electronics

Professional power inductor, common mode choke and Transformer manufacturer - Coilmaster Electronics
Since Coilmaster Electronics, established in 1995, is a professional supplier of magnetic components including high-performance power inductor, high current inductor, power choke, common mode choke, chip inductors, Lan magnetics as well. Expect to the standard components, Coilmaster also designs consumer magnetics to fit customer’s requirements. We have been committed to offering the high-quality passive components, supportive engineers through the entire design process, as well as providing the best service possible to the customers. Both of our support and service systems are designed to respond to the requirements of our customers. The systems are reviewed and modified continually to achieve the ultimate level of customer service. Certified with TS16949/ ISO9001/ ISO14001 high standard quality assurance system and meet AEC-Q200 to support automotive-grade products

Main Product:

High Current Inductor.
SMD Power Inductor. (Shielded Inductor, Unshielded Inductor, Semi-shielded inductor)
Common Mode Choke. (SMD Common Mode Choke, Through Hole Choke)
High Frequency Transformer.
Chip Inductor.
EMI Filter.
Choke Coil.
Ferrite Beads.
Line Filter.
Molding Power Choke.
RJ45 / LAN Transformer.


Coilmaster Own Reliability Laboratory - According to AEC-Q200 Checking List

Coilmaster Electronics owns equipment assets of more than 1.5 million RMB. This reliability test laboratory has more than five professional experimenters made up of product managers, R&D engineers, and quality engineers. This laboratory helps the Coilmaster team to develop the new series product, do the routine reliability test to make sure the high standard quality.  All the instruments are checked by third-party test organizations every year.

Electronics Testing

* Thermal rise
* Inductance (at frequencies from 5 Hz to 6 GHz)
* Q factor
* DC resistance (DCR)
* Leakage inductance

* DC current Bias (up to 25A)


Simulated Environmental Performance Testing
* Moisture resistance (−40°C to +150°C, 20% to 98% RH)

* Thermal shock (−55°C to +155°C)
* Thermal cycling (−55°C to +155°C)
* High and low temperature storage (−55°C to +155°C)

* High temperature operational life at +125°C plus temperature rise due to self heating
* Vibration

* Falling Test



Other Services
* Solderability testing
* RoHs

Our vision and product scope

Coilmaster Electronics always put customer satisfaction at first priority. To ensure the high reliability by maintaining quality control throughout the design and manufacturing process to surpass customer expectations. Furthermore, Coilmaster Electronics has consistently invested around 10~12% of total sales revenue in R&D and production department every year. Most of our outstanding engineers have the background for ferrite core. That provides an advantage during the designing stage. And our engineers are dedicated to seeking creative and cost-effective solutions to customers. We will do our best to support our superior products to worldwide customers.

To be the top SMD Power Inductor, Power Choke, Common mode choke supplier in the world, we constantly improve our production instrument to reach the zero defect. Zero defect at Coilmaster is not the slogan, it is a state of mind. Over the past years, Coilmaster invests the few million dollars to achieve this goal. From automated producing line to the testing machine.

Moreover, here is the brief information about our production capacity.
SMD Power Inductors: 120 million pcs / month

Wire Wound Common Mode Choke: 25 million pcs / month

Multilayer Chip Inductors: 280 million pcs / month

Total Quantity : 425 million pcs / month



Except for the standard lead time, Coilmaster Electronics also supports the Quick Delivery program, this service provides the limited volume of standard products with lead times from 15~25 days. This service will help our customers to have a prototype in the shortest time and seize business opportunities.
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