Second Sourcing Magnetic Components: Equivalence and Qualification
What makes two wound parts interchangeable, three arrangements that work, and why second sourcing fails after prototype.
HS Codes and Customs Classification for Magnetic Components
The classifications that actually apply to cores, chokes and transformers, the documents that defend them, and valuation traps.
Magnetic Component Supplier Audit Checklist: Six Stations and Ten Questions
A one-day audit plan for magnetic component factories, with the evidence to request at each station.
Transformer Inrush Current and Residual Flux: Causes and Countermeasures
Why identical transformers show different inrush, what the supplier can control, and how to specify a comparable number.
Designing the Boost Inductor for Solar PV Inverters
Operating envelope, core material choice, winding practice and 20-year reliability for the MPPT boost inductor.
Magnetics for EV On-Board Chargers: PFC Inductor, Isolation Transformer and Filter
The four magnetic components that set OBC volume and loss, plus the qualification points buyers overlook.
Amorphous vs Nanocrystalline vs Ferrite Cores: Choosing by Design Constraint
Saturation, permeability, loss, Curie temperature and cost compared, with the decision rules that hold up in real designs.
MOQ, Lead Time and Tooling for Custom Magnetic Components
The three cost layers behind MOQ, realistic first-article timelines, and five ways to launch at low volume without prototype pricing.
How to Write a Transformer RFQ That Gets Accurate Quotes
Nine RFQ blocks, the fields buyers omit most often, and how to compare two quotes on equal terms.
RoHS and REACH Compliance for Magnetic Components: A Buyer’s Checklist
The four material regimes, the six risk material families, and the five questions that close most compliance exposure.