Custom Inductor Coils — OEM / ODM Manufacturer Guide
Custom Inductor Coils — OEM / ODM Manufacturer
Inductor coils in rod core, air core, toroidal, and SMD types — custom-designed and manufactured by Pingxiang Chengpin Technology Co., Ltd. (a subsidiary of Golden Eagle Group). From microhenry to millihenry levels, we offer full OEM/ODM service with precision winding, tight tolerances, and 100% electrical testing.
Why Buyers Choose Us (E-E-A-T)
- Precision winding on NITTOKU automatic machines — our Litz-wire coils achieve a flatness of 0.13 mm, among the best in the domestic industry.
- Wide material range — ferrite, iron powder, and air-core options for power, RF, and filter applications.
- 100% electrical testing — inductance, Q-factor, and DC resistance verified on every unit.
- ISO 9001 / ISO 14001 certified factory, products manufactured in line with TUV, SGS, and UL requirements; trusted by customers including TDK and FOXCONN.
Product Specifications (typical range — confirm against your design)
| Parameter | Typical Range | Notes |
| Coil type | Rod core / Air core / Toroidal / SMD | Custom |
| Inductance | Microhenry – millihenry levels | Per design |
| Wire type | Litz / enameled / self-bonding | Custom |
| Flatness | Down to 0.13 mm (Litz) | Industry-leading |
| Q-factor | Per design | Tested 100% |
| DC resistance | Per design | Per wire gauge & turns |
| Operating frequency | Up to RF range | Per application |
| Terminations | Pins / pads / wires | Custom |
Customization Options
- Core material and shape matched to your inductance, current, and frequency targets
- Litz-wire designs for low-loss, high-frequency applications
- Tight flatness control for space-constrained assemblies
- Custom wire types, terminations, and mounting
- Prototype samples before mass production
Applications
- Power supplies and DC-DC converters
- Audio equipment and speakers
- RF circuits and antennas
- EMI filter circuits
- Automotive and industrial electronics
Manufacturing & Quality Control
Incoming material inspection → precision winding (NITTOKU automatic machines) → first-article inspection → 100% electrical testing (inductance, Q, DCR) → outgoing inspection. Quality system certified to ISO 9001 and ISO 14001.
FAQ (also implemented as FAQPage schema below)
Q1: What types of inductor coils do you manufacture?
Rod core, air core, toroidal, and SMD inductor coils, with inductance from microhenry to millihenry levels and custom wire types including Litz and self-bonding.
Q2: Can you achieve tight flatness for space-constrained designs?
Yes — our Litz-wire coils reach a flatness of 0.13 mm, among the best in the domestic industry, thanks to NITTOKU precision winding machines.
Q3: What is your MOQ for custom inductor coils?
MOQ depends on design and tooling. Design-specific. Typical MOQ: 1,000 pcs for standard designs (samples available first).
Q4: How do you ensure coil quality?
Every unit is 100% tested for inductance, Q-factor, and DC resistance, under an ISO 9001 quality system with incoming and outgoing inspection.
Q5: What certifications does your factory hold?
ISO 9001 and ISO 14001 certified, with products manufactured in line with TUV, SGS, and UL requirements.
Q6: What is your production capacity?
A monthly production capacity of 2 million units, supported by NITTOKU automatic winding machines and more than 800 skilled workers.
Q7: How long does prototyping take?
Typical prototype lead time 7-15 days after design confirmation. Samples available before mass production.
Q8: Do you provide Litz-wire coils?
Yes — Litz-wire designs are available for low-loss, high-frequency applications, with tight flatness control and 100% electrical testing.