The Siemens SENTRON 3VA9267-0HC10 is a motorized operating mechanism with stored energy mechanism (SEO) designed as an accessory for 3VA2 molded-case circuit breakers in the 100 A, 160 A, and 250 A frame sizes. It provides remote electrical charging and closing of the breaker mechanism, eliminating the need for manual operation in automated distribution panels. Rated for 24 V AC/DC control voltage with a 300 VA operating apparent power draw, this operator delivers a make time and break time of 0.08 s each — consistent, repeatable switching for motor-control-center or switchgear applications where coordination with upstream protection matters. The stored-energy design means the mechanism charges a spring, then releases it to close the breaker contacts at a consistent speed independent of control-voltage variations — critical for maintaining breaker interrupting ratings and avoiding contact welding on high-fault close-in.
Dimensions are 105 mm wide, 118.7 mm high, and 162.8 mm deep — this operator mounts directly onto the 3VA2 breaker front, not on DIN rail. The 7 mm stripped-length requirement on the control wiring matches standard ferrule preparation for the spring-cage terminals on the operator's control block. No derating curve is published in the basic spec, but the wide range suggests the mechanism's lubricants and spring materials are selected for cold-start reliability.