The Siemens 3VA9988-0BL32 is a shunt trip — an auxiliary release that sits in the left accessory slot of SENTRON 3VA1 and 3VA20 through 3VA25 molded case circuit breakers. That's your remote or automated trip signal: from a safety relay, a PLC output, an emergency-stop circuit, or a supervisory system that needs to kill power without a human pulling the handle. The coil draws 40 VA on AC and 40 W on DC at maximum, so the control transformer or DC supply feeding it needs to cover that inrush.
Physical envelope: 65.1 mm tall, 25.7 mm wide, 31.2 mm deep. That's the left-side accessory slot depth on the 3VA frame — it doesn't add width to the breaker itself. Stripped length for the screw terminals is 10 mm (0.4 in). Three connection slots on the release. No DIN-rail space consumed beyond what the host breaker already occupies.
Product status is Active. This is a current-production Siemens catalog item, not a phase-out or NRND line. It's the standard shunt trip for the 3VA1 and 3VA20-3VA25 breaker family — no substitution needed, no last-time-buy window to watch.