The Siemens 3RV1915-5AA00-0FC3 is a 3-phase busbar that feeds two circuit breakers in the S0 and S00 frame sizes, with a 45mm division — a specific variant marked for ATLAS COPCO integration. It's a current-production item, so no lifecycle obsolescence concern for BOM planning.
What the 45mm Division Means for Your Panel
The 45mm busbar division matches the standard mounting pitch for two S0/S00-sized breakers side by side on a DIN rail. It's a rigid copper or plated bar that distributes incoming three-phase power to both breaker line terminals without additional wiring. Verify your panel's busbar entry point — this variant's 45mm spacing is narrower than the common 55mm pitch used for larger frames like S2/S3, so it fits compact sub-distribution blocks.