What this MCCB carries and where it fits
The Siemens SENTRON 3VA2110-7MN32-0DH0 is a 3-pole molded case circuit breaker rated for 100 A continuously across the full ambient range of 40 °C to 70 °C — no derating needed as the panel warms near furnace zones or drive cabinets. Its interrupting capacity hits 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, then 187 kA at 500 V; at 690 V it still clears 3.7 kA. That kind of fault-clearing headroom means this breaker can sit upstream of a motor starter or downstream of a transformer without worrying about cascading failures on a high-fault bus. Designed specifically for motor protection with integrated phase failure detection and an undervoltage release (UVR), it suits induction-motor branch circuits where a voltage dip or lost phase needs to drop the load fast. The auxiliary switch complement — two auxiliary switches plus one trip alarm switch HQ — gives the PLC a clean status signal without an external interface relay.
Lifecycle and sourcing posture
For buyers with a BOM line frozen around this MPN, the 100 A rating and 3-pole footprint are stable. Sourced and quoted to order against an RFQ through independent supply — availability and current pricing confirmed at quote time.
Panel fit and integration notes
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without crowding adjacent breakers. The 86 mm depth leaves room behind the gland plate for wiring and the UVR coil connections. Maximum power loss is 12.5 W, so internal cabinet heat rise stays manageable even in a densely packed panel. Operating temperature range of -25 °C to 70 °C covers most industrial environments including non-conditioned electrical rooms near a hot-strip mill.
Key ratings in context
The 330 kA at 240 V is a high-interrupting rating for a 100 A frame — it lets this breaker serve as the main disconnect on a low-voltage switchboard fed by a large transformer. At 415 V (common 3-phase industrial voltage), 242 kA still exceeds what most distribution panels see. The 690 V rating of 3.7 kA is lower, but at that voltage the breaker is typically protecting a motor circuit, not a main bus. Trip indicator is present, and the undervoltage release ensures the breaker opens on a voltage sag — useful for preventing single-phasing on a motor load. No communication function or ground-fault monitoring on this variant, so it's a straightforward thermal-magnetic protector without digital integration.