SMD Flat Coil Assemblies

Precision Bobbin Coils — Custom OEM/ODM Manufacturing

Custom SMD flat coil assemblies manufactured for PCB surface-mount applications, featuring compact low-profile structure, stable inductance, reliable solder terminals, and OEM/ODM customization based on drawings or samples.

Winding MaterialCopper / Enameled / Litz / Aluminum / Flat / Self-bonding / etc

Winding Precision± 0.01mm

Winding TurnsCustomizable (1T – 10,000T)

Minimum Order QtyCustomizable

Lead Time7–15 business days

Payment TermsT/T, L/C, Western Union

Send Email

Typically responds within 24 hours · Free samples available

30+ Years Experience

ISO Certified Factory

Shipped to 30+ Countries

SMD Flat Coil Assemblies are compact surface-mount electromagnetic coil components designed for PCB-mounted electronic modules that require low profile, stable inductance, and efficient electromagnetic performance. The flat winding structure and integrated solder terminals make these coils suitable for automated assembly, compact circuit layouts, and high-density electronic designs.

WIRESUN manufactures custom SMD flat coil assemblies according to customer drawings, samples, or electrical specifications. Coil shape, outer dimensions, wire diameter, winding turns, resistance, inductance, terminal layout, base structure, and mounting requirements can all be customized. These coils are suitable for wireless charging modules, sensors, communication devices, automotive electronics, consumer electronics, medical devices, RFID modules, and custom PCB assemblies. Prototype development, sample validation, and mass production are available for OEM/ODM projects.

Applications

Smartphones & 3C Electronics

Automotive Electronics

Industrial Sensors

Precision Instruments

Audio Equipment

Wireless Charging

Item	Specification
Product Name	SMD Flat Coil Assemblies
Coil Type	SMD coil / Flat coil assembly / Surface-mount coil / Custom PCB coil component
Application	PCB modules, wireless charging, sensors, communication devices, automotive electronics, consumer electronics, medical devices, RFID modules
Wire Material	Enameled copper wire, self-bonding wire, flat copper wire, Litz wire, or custom specified material
Wire Diameter / Size	Customizable according to drawing or sample
Coil Shape	Round, square, rectangular, flat, low-profile, or custom surface-mount geometry
Mounting Type	Surface mount / PCB soldering / Custom terminal mounting
Terminal Type	Metal solder terminal, SMD pad, pin terminal, or custom terminal design
Outer Dimensions	Customizable
Winding Turns	Customizable
Resistance	Customized to customer specification
Inductance	Customized to customer specification
Base / Carrier Material	Plastic carrier, magnetic base, insulated base, or custom assembly structure
Quality Control	Appearance inspection, dimension check, resistance test, inductance test, solder terminal inspection, continuity test, and batch inspection
Production Type	OEM / ODM / drawing-based custom manufacturing
Sample Support	Available

Our standard MOQ is 500 pcs for most coil types. For first-time customers or prototype evaluation, we accept small trial orders of 10-50 pcs. MOQ may vary by product complexity. Contact us for a specific quote.

Yes. Samples are available within 5-7 business days after engineering confirmation. A nominal sample fee applies, which is credited toward your first mass production order.

You can email drawings such as PDF, DWG, or STEP files, or fill out our inquiry form. If you do not have drawings, a written description or physical sample is also acceptable.

We can wind wire as fine as 0.01mm using Zongheng CNC precision winding machines with automated tension control.

Yes. Our special-shaped coil series handles non-circular and irregular geometries. Submit your drawings and our engineering team will assess feasibility.

Standard options include bare copper wire, enameled copper wire, and Litz wire. Custom alloy or coated wire options are available on request.

Yes. Provide your target inductance, frequency, and DC resistance requirements, and we will calculate and wind to specification.

WIRESUN is ISO 9001 certified. Products can ship with test reports and COA. Third-party inspection can be arranged upon request.

All coils are wound on CNC machines with precision control. Each production batch undergoes electrical testing, including inductance, DCR, and impedance checks.

Standard documentation includes packing list, commercial invoice, Certificate of Analysis, and electrical test report. RoHS/REACH documents are available upon request.

We ship worldwide. Regular destinations include Southeast Asia, Europe, the Americas, the Middle East, and Russia. Express and sea freight options are available.

Standard terms are 30% T/T deposit upon order confirmation and 70% balance before shipment. L/C is accepted for larger orders, and Western Union is available for sample fees.

Standard products usually take 15-20 business days. Complex custom coils generally take 20-30 business days. Final lead time is confirmed at quotation stage.