The Siemens 3VU9135-0BB03 is an accessory designed for the 3VU13 switch family, used in motor protection and control circuits within industrial panels.
Lifecycle reality — NRND
This part carries an NRND (Not Recommended for New Designs) status, meaning Siemens no longer recommends it for new projects. Existing BOM lines relying on it should plan for a replacement or secure supply through the independent channel. The product class is C: manufactured or produced to order, which means it is not a standard stocked item — each unit is made against a specific order, and the part cannot be returned for credit.