Author name: Thor

IEC 61643 is a family, not a single standard. Find out which part covers AC, DC, PV and signal SPDs, and what the 2025 edition of Part 11 changed.

Most SPD datasheets lead with the biggest number on the page, and for a Type 2 device that number is

Verify a surge protection device certificate against its model, ratings, test report and issuing database before placing an order.

How a lightning protection system works end to end: IEC 62305 zones, air terminals, earthing, and the SPDs that limit surges reaching your equipment.

How does a lightning conductor work? Follow the current from the rooftop air terminal through bonding and down conductors to earth.

Solar DC SPD connection diagram done right: parallel PV+/PV- to earth, U-type vs Y-type, where to install it, and the lead-length rule that matters.

Choose industrial surge protection by voltage, SPD type, installation point and surge rating, with IEC 61643-11 product examples.