What this MCCB carries and where it fits
The Siemens 3VA2116-5JQ32-0CC0 is a SENTRON molded case circuit breaker rated for 160 A continuous current at 40 °C, with the current staying flat at 160 A through 50 °C before it starts to derate—154 A at 55 °C, 148 A at 60 °C, 142 A at 65 °C, and 136 A at 70 °C. That means in a warm panel you still get nearly full rating up to 50 °C; past that, the thermal curve steps in and you size accordingly. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V—so the interrupting rating drops sharply above 500 V. On a 480 V or 600 V class panel, the 79 kA at 500 V figure is the one that governs SCCR coordination; the 690 V figure of 4.25 kA is low, so if your system runs at 690 V, this breaker is only suitable for low-fault locations. It is a 3-pole line-protection breaker with an ETU560 electronic trip unit—adjustable for long-time, short-time, and instantaneous pickup—and comes equipped with an undervoltage release (UVR) and 2 auxiliary switches (HQ contacts). No trip indicator, no voltage trigger, no phase-failure detection. Communication is supported (the listing shows a communication function present), so it can talk to a higher-level system for status or remote trip. Dimensions: 105 mm wide by 181 mm tall by 86 mm deep. That width is the standard 3-pole MCCB footprint for this class—fits the usual DIN-rail or mounting-plate patterns in a SENTRON panel. Endurance is rated at 20 000 operations, which is solid for a breaker this size.
What the ratings mean for a panel build
Rated insulation voltage Ui is 800 V—so the internal insulation is rated for that level, even though the interrupting capacity above 500 V is limited. The maximum power loss is 28 W, which matters for heat load inside a sealed enclosure; if the panel is in a 50 °C ambient, the breaker itself is still comfortable up to 70 °C operating ambient, but the 28 W dissipation adds to the enclosure's thermal budget. Storage temperature range is -40 °C to 80 °C, so it can sit in an unheated warehouse or a hot shipping container without damage. Operating range is -25 °C to 70 °C—fine for most industrial environments, but not rated for extreme cold starts below -25 °C. The UVR (undervoltage release) is a factory-fitted option that trips the breaker when supply voltage drops below a threshold—common for safety circuits or to prevent motor re-acceleration after a dip. The auxiliary switches (HQ contacts) give status feedback to a PLC or annunciator. The ETU560 electronic trip unit allows field-adjustable settings, so you can coordinate with downstream breakers without swapping trip units. Ground-fault monitoring is configured for summation current formation on the L-conductor, meaning it can detect ground faults by summing the phase currents—useful for solidly-grounded systems where residual current monitoring is needed.