The Siemens 3RV1923-7BA00 is a rotary operating mechanism handle for the 3RV2 family of motor starter protectors and circuit breakers. It's the gray/black version — the part you grab to manually open or close the breaker from the front of the panel, without reaching into live gear.
RoHS compliant since July 1, 2006, and REACH candidate-list information is available on request. No export restrictions under AL/N or ECCN:N, so it ships without special licensing paperwork.
Packaged dimensions are 94 x 167 x 32 mm — it's a slim handle that mounts directly to the 3RV2 breaker front. No extra DIN rail space consumed; the handle clips onto the breaker's rotary operator shaft. The gray/black color coding is standard for the SIRIUS line, so it matches the rest of the panel aesthetics without sticking out.