Custom Transformers
High-frequency transformers, planar transformers, low-frequency transformers, toroidal transformers, isolation transformers and potted step-up transformers.
OEM/ODM magnetic components manufacturer
Custom Transformers, Inductors, Reactors & EMI Filters Built to Your Drawings or Samples
Send us your electrical specifications, drawings, or physical sample details. Yunleeb prototypes and manufactures custom magnetic components for OEM power electronics, from engineering review to repeatable production.
- 10+ years OEM manufacturing
- Prototype and mass production
- Transformers, inductors, reactors and filters
What we manufacture
Custom magnetic components matched to your application
Inductors & Chokes
Toroidal inductors, common mode chokes, differential mode chokes, high-current inductors and application-specific magnetic ring components.
Reactors
Low-frequency reactors, R/CD/CC type reactors and custom winding structures for inverter, power supply and industrial control applications.
EMI Filters
UU/EE type filters and custom EMI filter assemblies designed around current, frequency, insulation, layout and space constraints.
Send drawings, specs or samples
Start from your real engineering requirement
You do not need to choose a standard item. Share the target function, electrical conditions, mechanical constraints and expected quantity. We review the project and respond with the next engineering step.
- PDF, DWG, DXF, STEP, BOM or datasheet
- Input/output, power, frequency, current, inductance and insulation requirements
- Target dimensions, pin layout, core type, wire leads or mounting requirements
- Physical sample photos or reverse-engineering reference details
Useful RFQ details
Product type
Application
Electrical specs
Mechanical size
Prototype quantity
Annual production estimate
Factory strength
Real production, testing and sample capability
Applications
Built for OEM power electronics projects
EV charging
Custom magnetic components for charger modules, auxiliary power, high-voltage isolation and high-current conversion.
Solar inverter
Transformers, reactors and inductors for photovoltaic inverter systems and renewable energy equipment.
Energy storage
High-frequency transformers and inductors for ESS converters, battery systems and power modules.
Industrial power supply
Custom wound components for switching power supplies, control boards and industrial equipment.
Medical electronics
Isolation and compact magnetic components for equipment where size, insulation and stability matter.
Welding equipment
High-power transformers, reactors and inductors for welding machine power boards and inverter systems.
Prototype to production
From engineering review to repeatable production
- Requirement ReviewSend drawings, specifications, a BOM, sample photos or target performance data.
- PrototypeWe confirm feasibility, winding structure, materials and sample requirements.
- TestingSamples are checked against electrical and mechanical requirements before approval.
- Sample ApprovalYou validate the sample in your application and confirm the production specification.
- Mass ProductionApproved specifications are used for batch production and repeat orders.
Engineering inquiry
Send your requirements for a technical review
Tell us what the component must do. An engineer will review your information and respond with a practical next step for prototype or production.
Email project files
yunleeb@outlook.com
WhatsApp as secondary contact
Send drawings or photos if email is not convenient
Shopify contact forms do not attach files by default. Send PDF, DWG, DXF, STEP, images or sample information by email or WhatsApp after submitting the RFQ.