The Siemens 3VA2612-6HL32-0BE0 is a 3-pole IEC air circuit breaker in the 3VA2 frame, sized for 1250 A continuous current with an ETU320 LI (Long-time + Instantaneous) electronic trip unit. The trip unit's overload setting (Ir) is adjustable 500 A to 1250 A, and the instantaneous pickup (Ii) is adjustable 1.5 to 10 times In (1875 A to 12,500 A), so you can tune coordination with downstream feeders without swapping the breaker.
The description includes an undervoltage release (24 V DC) and provisions for up to four auxiliary switches — these are factory-fitted accessories that connect via the breaker's accessory slot. When wiring the undervoltage release, verify the control voltage source is stable 24 V DC; the release trips the breaker if control power drops, so it's commonly used in emergency-stop chains or safety circuits where loss of control voltage must open the main contacts.
Selectivity and coordination
The ETU320 LI curve, combined with the 85 kA interrupting rating, makes this breaker suitable as a main or feeder breaker in a distribution board where selectivity with downstream MCCBs or fuses is required. The adjustable Ir (500-1250 A) lets you match the cable or busbar ampacity, while the Ii range (1.5-10 x In) allows you to set the instantaneous trip high enough to avoid nuisance tripping on motor inrush or transformer energization. For a site electrical engineer building a coordination study, the trip curve data for the ETU320 is published in Siemens application guides — the breaker's own rating card carries the settings range.