The 7ME3960-0DM40 is a pipe damping film for the D4 transducer, part of the SITRANS FS220 ultrasonic flowmeter family. It's the legacy part number CC129-1A-4, so if you've got that on a BOM or a bin label, this is the same item. This isn't the flowmeter itself or the transducer — it's the damping film that sits between the transducer and the pipe wall, reducing signal noise from pipe vibrations. If you're rebuilding a D4 transducer assembly or restocking spares for a FS220 installation, this is the consumable you need.
Class C product classification means it's manufactured to order, not a shelf-stocked item. You won't find it sitting in a bin at a distributor; it's pulled from Siemens production when you place the order. Plan your lead time accordingly — this isn't a same-day ship part. Export control is straightforward: AL: N / ECCN: EAR99I, so no ITAR or special licensing hurdles for cross-border shipments. Just standard EAR99 documentation.
Compliance note — read before specifying
Not RoHS-compliant. If your line or end customer requires RoHS conformity for all installed components, this film won't pass. REACH candidate list information is available on request, but the RoHS exemption is the hard gate.