What it is and what it does
The Siemens SENTRON 3VA2116-6HN32-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated 160 A continuous at 40 °C through 70 °C — no derating needed across that span, which simplifies panel thermal calculations. It's designed for line protection, not motor or feeder backup; the interrupting ratings are 242 kA at 240 V, 187 kA at 415 V, and 121 kA at 500 V, so it handles high-fault utility or transformer-fed mains. The 800 V rated insulation voltage covers 480Y/277 V and 600 V systems with headroom. Mounts in a standard panel footprint (105 mm wide, 181 mm tall, 86 mm deep) — fits existing SENTRON 3VA cutouts without rework.
Key ratings and what they mean for fit
The 160 A continuous rating holds flat from 40 °C to 70 °C ambient — no thermal derating curve to chase, which is unusual for a frame this compact. The 242 kA at 240 V and 187 kA at 415 V interrupting capacity means it can be placed at the service entrance or on a high-fault bus without needing a current-limiting fuse upstream. The 3-pole design with a trip indicator and a built-in auxiliary switch plus trip alarm switch gives remote status without an add-on module. Power loss is 25.5 W maximum — manageable for enclosure heat budgets.
Panel integration and mounting
The 105 mm width matches the standard SENTRON 3VA panel cutout; depth is 86 mm, so it clears shallow backpanels. No undervoltage release and no communication function — this is a straight line-protection breaker, not a smart or shunt-trip variant. The supplied basic switch is order code 3VA21166HN320AA0 — that's the internal mechanism; the breaker ships fully assembled.