The Siemens 3VA1110-6MH32-0AG0 is a 3-pole IEC frame 160 molded case circuit breaker (MCCB) in breaking capacity class H, meaning it can interrupt 70 kA at 415 V — a rating sized for high-fault industrial distribution panels where upstream transformer capacity is substantial. The thermal-magnetic trip unit is the TM120M, set at 100 A, with short-circuit pickup adjustable 5 to 15 times In. This variant ships without overload protection (the TM120M provides only magnetic short-circuit protection), so it functions as a dedicated short-circuit protective device for motor starter circuits where overload protection is handled separately by the contactor/overload relay. The nut keeper kit, one auxiliary switch (HP), and one trip alarm switch (HP) are factory-fitted — no field assembly required for these accessories. The auxiliary switch signals the breaker's open/closed position; the trip alarm switch signals a fault trip, which is useful for remote annunciation in a PLC or SCADA system.
What the ratings mean for fit
The 70 kA Icu at 415 V is the ultimate short-circuit breaking capacity — the breaker can safely clear a fault at that level once and remain functional. For motor starter duty, the TM120M's magnetic trip range (5–15 x In) means the instantaneous pickup can be set between 500 A and 1500 A, which is typical for coordinating with motor inrush without nuisance tripping on a 100 A motor circuit. Because this variant omits overload protection, it pairs with a separate overload relay (e.g., Siemens 3RU2 or 3RB3 series) in a Type 2 coordinated starter. The IEC frame 160 footprint mounts in standard Siemens 3VA1 panelboard and switchboard cutouts.