What it is and what the ratings mean
The SENTRON 3VA2116-5HN32-0AG0 is a 3-pole molded case circuit breaker (MCCB) from the 3VA2 series, designed for line protection — meaning it sits at the incoming feeder or main distribution point, not at a motor or branch load. It carries a continuous rated current of 160 A across the full ambient temperature range from 40 °C to 70 °C, so no derating curve is needed for a warm panel; the 160 A holds at every point in that band. The interrupting ratings are what decide the fit: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V tells you this breaker is built for high-fault-capacity service — typical for a transformer secondary or a large industrial switchboard where available fault current is well above 100 kA. The 3.7 kA at 690 V is a steep drop, which means if your system runs at 690 V, this breaker is not the right choice; the arc extinction at that voltage is fundamentally different.
Panel fit and integration
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or backplate-mounted distribution panels. The supplied basic switch is 3VA21165HN320AA0, and the auxiliary contact block is configured as 1 auxiliary switch plus 1 trip alarm switch (HP type). No undervoltage release, no ground-fault monitoring, no communication function — this is a plain line-protection breaker with a trip indicator. The rated insulation voltage is 800 V, which covers 480 V and 600 V class systems with margin. Maximum power loss is 25.5 W; factor that into enclosure thermal calculations if the panel is sealed or tightly packed.