Finding Voltage Ratings of Inductors

I cannot find fitting voltage rating for inductors in their datasheet, what should I do?

Inductors are rarely specified with a strict voltage rating. Instead, their limitations are typically driven by insulation, construction, and application-specific stress conditions, which are not always explicitly stated.

For high-voltage applications such as piezo drivers, this can make component selection challenging. Many compact, commercially available inductors are nominally rated for 20–30 V, while higher-voltage-rated parts (e.g., 95 VDC) are often larger and more costly due to conservative lifetime design assumptions. However, in practice, many inductors can tolerate higher voltages than their published ratings suggest—especially in applications with non-continuous or low-duty-cycle exposure to high voltage.

To address this gap, we provide a dedicated Inductor Selection application note that explains how to evaluate inductor voltage stress in real operating conditions and how to approach component selection with suppliers.