What this MCCB is and what it does
The Siemens SENTRON 3VA2116-6HM42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It's designed for line protection in distribution panels, meaning it sits on the feeder side protecting cables and busbars against short circuits and overloads, not motor or generator protection. Breaking capacity is the headline number here: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V is a high-interrupting rating — it can clear a massive fault without welding contacts or venting plasma into the panel. The steep drop to 3.7 kA at 690 V tells you this breaker is optimized for low-voltage distribution up to 500 V; at 690 V it's still usable but the fault-current headroom is much tighter.
Sizing and selectivity in the panel
The 160 A continuous rating is flat from 40 °C to 70 °C — that's unusual for an MCCB and saves you the headache of calculating derate curves for a warm enclosure. The rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems with margin. The 4-pole configuration (switched neutral) is typical for TN-S or IT systems where you need to isolate the neutral alongside the phases. Maximum power loss is 25.5 W — not negligible in a sealed panel with other heat sources. Account for it in your thermal budget if you're packing multiple breakers in a small enclosure. No undervoltage release, no voltage trigger, no communication function: this is a plain-vanilla thermal-magnetic MCCB with no auxiliary electronics. If you need remote tripping or status feedback, you'll add external accessories.
Physical fit and panel integration
Dimensions: 86 mm deep, 140 mm wide, 181 mm tall. That's a standard 4-pole MCCB footprint — it'll drop into most DIN-rail or panel-mount bases designed for SENTRON 3VA frame sizes. No trip indicator on the front face, so you'll need a separate visual indication if that matters for your maintenance walk-downs. Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C. Fine for unheated warehouses and most indoor industrial environments. Ground-fault monitoring uses summation current on L+N — that's a residual-current detection method, not a full ground-fault relay, so it covers line-to-ground faults on the load side but doesn't replace a dedicated GFCI breaker.