What it is and what it does
The 6ES7928-3BA20-4AA0 is a relay for TPRI applications with a 230 V AC coil voltage, packed in units of 4. It's a made-to-order part (Product class C), meaning each order triggers production — not a shelf-stocked item, so plan lead time accordingly.
Compliance and regulatory
RoHS compliant since 26 September 2014. REACH Article 33 disclosure applies: lead (CAS 7439-92-1) above 0.1% w/w in the candidate list. Export controls are AL: N / ECCN: N, so no special licensing for standard industrial use.