When to Engage a Magnetics Manufacturer for Custom Designs

Magnetic components are often treated as a late-stage selection, chosen after the schematic and PCB layout are largely complete. While this can work for low-risk designs, it frequently leads to compromises in performance, reliability, cost, and manufacturability—especially in high-current or industrial applications.

The best time to involve a magnetics manufacturer is before the PCB layout is finalised. Footprint, orientation and clearance considerations are far easier to optimise before the layout is frozen. Once complete, even small changes can mean costly PCB re-spins.

For applications where reliability is critical—such as automotive, defence, mining, industrial, medical, or renewable energy—early involvement ensures insulation systems, mechanical robustness, and thermal margins are designed for real-world conditions, not just nominal operation.

If you’re forcing a standard catalogue part to “almost” work through derating, extra cooling, or EMI workarounds, it’s often a sign that a custom or semi-custom solution should be considered. Discussing this early can improve performance and reliability while reducing total system cost.

Finally, involvement before moving from prototype to production helps validate manufacturability, repeatability, material availability, and cost stability—avoiding unpleasant surprises at scale.

Involving a magnetics manufacturer early turns them from a component supplier into an engineering partner. For many designs, that early conversation can save time, cost, and risk later in the project lifecycle. Early engagement with Coiltek’s engineering team from prototype to scale will ensure your magnetics are optimised for both performance and manufacture.