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One Stop Solution

with fast delivery times, reliable quality and high level of support

Professional Manufacturer For

Inductor, Choke, Transformer & Customized Your Need

Signal / Internet Application

Make product smarter and stronger / especially for automatic data processing machines

Welcome to Coilmaster Electronics

About Coilmaster

Coilmaster Electronics (Established in 1995) -  The Professional manufacturer for various kinds of passive component, such as SMD type of inductor(SMD Power Inductors / High current inductor) also known as Surface Mount Inductor / Power Inductor / High current power inductor, Through hole inductor (Radial leaded inductor), Common mode choke, Transformer, LAN magnetics. We also consistently improving quality of products and aims to offer various choices to customers. Provides various types of power inductor, magnetic and inductive to our customers with the best service and value is our vision. 

Surface mount power inductor includes- Shielded inductor(Shielded power inductor), Non-shielded inductor(Unshielded inductor), Semi-shielded inductor, High current inductor (Molded power choke), Magnetic shielded Inductor, Power Inductor and SMD Common mode choke. Through hole inductor includes (Pin type inductor)- Toroidal inductor, Radial leaded inductor, Common mode choke, Choke coils, Power choke coils, RF choke. Lan magnetics includes - Lan filter (Lan transformer), RJ45 Jack, RJ45 with transformer, RJ45 magnetics , Telecom transformer and High frequency transformer.

Coilmaster performs prompt delivery , competitive price and reliable quality. We also continuous improve to exceed customer's expectation and be the best partner for magnetics & passives. Coilmaster also could help you to provide the alternative for the EOL / discontinued inductors. And you do not have to wait 20 weeks due to allocations, our lead time is around 5~8 weeks only (excluding the holiday). If for urgent case, we still offer special fast program service with a little extra cost but could deliver the goods to you in 2~4 weeks. Our product range could cover around 90% of all passive components including Murata, Sumida, TDK, Coilcraft, Wurth, Bourns, Vishay, Panasonic, Yageo, and others. For further information, please feel free to contact us immediately!

SMD Power Inductor


Shielded / Semi-Shielded / None Shielded Power Inductor

Coilmaster Electronics have complete production line and adequate design experience in field of power inductors which could use to design in power supply inductor, SMD high current inductors, high saturate current inductor, high power inductor, surface mount inductor, or other circuit which may require a power inductor.

The SMD magnetically shielded housing is assembled with a drum core and ring core. Will use the shielded ring core to cover the areas around the coil to gives these products as closed magnetic circuit to achieve low EMI levels.

SMD semi-shielded inductor is the product between magnetic shielded and non-shielded products. The type in which the wound drum core is covered and molded with magnetic epoxy.

SMD wire-wound inductor (non-shielded inductor)is the type in which just winding wire around a drum core, there is no magnetic shielding.

Coilmaster’s sales person will provide the most suitable alternative inductor to you according to the request inductance value , DCR , IDC on the power inductor (custom inductors is also available for us).If you already use other power inductor from different brand but with higher price, longer lead time. Coilmaster could provide the better solution to you. We could provide 100% alternative power inductors with same lay out and even with better characteristic. The free of charge samples is also available.

Common Mode Choke

Common Mode Choke

SMD / THT Common Mode Choke

Coilmaster produces different kinds of common mode choke(Common mode inductor). Common mode choke could categorized by size, inductance, impedance, IDC, DCR…etc. Most common sizes for rated voltage are 50 V, 250 V and 500 V. We also carry common mode chokes with rated voltage as high as 250 kV. Rated current can be between 0.4 mA and 23 A, with the most frequent common mode chokes having a rated current of 500 mA, 1A or 2 A. Custom common mode inductors (common mode choke) is also available for us.

Common mode choke also could use to design on different applications, such as, high current common mode choke, Ethernet common mode choke, SMD common mode choke, surface mount common mode choke and for other applications which will use common mode choke, common mode inductor, common mode filter. If you need the alternative for other brand, please feel free to contact our sales people, we will provide the most suitable common mode choke product to you.



High Frequency Transformer (SMD / THT type)

A transformer is an electrical device that transfers energy between two or more circuits through electromagnetic induction. A varying current in the transformer's primary winding creates a varying magnetic flux in the core and a varying magnetic field impinging on the secondary winding. This varying magnetic field at the secondary induces a varying electromotive (emf) or voltage in the secondary winding.

Coilmaster Electronics could offer the whole solution for customer who is looking for reliable quality of transformer. We could produce different kind of transformer, such as high frequency transformer, high power transformer, high voltage transformer, customize transformer and standard transformers. Both vertical transformer and horizontal transformer is available.