What this MCCB is and where it fits
The Siemens SENTRON 3VA2063-5HN32-0AD0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in distribution panels and industrial switchboards. Its interrupting capacity hits 187 kA at 240 V AC, dropping to 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V — the 690 V figure tells you this is a 240–500 V workhorse, not a 690 V main breaker. The 63 A rating holds flat across the full -25 to 70 °C operating range, so no derating curve to chase in a warm enclosure. Rated insulation voltage is 800 V. The 756 A value is the rated ultimate short-circuit breaking capacity (Icu) under test conditions, not a continuous rating. The continuous current is 63 A.
Dimensions and panel fit
Physical footprint: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is the standard 4-pole-module width for a 3-pole MCCB in the SENTRON 3VA frame — it occupies three 27 mm pole pitches plus a bit of frame. The 86 mm depth includes the arc chamber and termination hardware; check your enclosure depth against that figure, especially if you are retrofitting into a shallow panel.
What the auxiliary switch configuration tells you
This unit ships with 3 auxiliary switches (HQ type) built into the basic switch assembly. The base order code 3VA20635HN320AA0 is the supplied switch platform. No undervoltage release, no voltage trip, no ground-fault monitoring, no communication function — it is a plain line-protection MCCB with auxiliary contacts for status feedback to a PLC or annunciator panel.
Thermal management and storage
Maximum power loss is 5.4 W at rated current — negligible for most enclosures, but worth noting if you are packing multiple breakers in a sealed, uncooled cabinet. Storage range is -40 to 80 °C, wider than the -25 to 70 °C operating range; the storage limit governs handling during shipping and warehouse idle, not running conditions.