The Siemens SENTRON 3VA2063-5HN36-0BL0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across its full ambient temperature range from 40 °C to 70 °C — no derating needed up to the 70 °C operating maximum. Breaking capacity reaches 187 kA at 240 V AC, stepping down to 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V. This is a line-protection design (not motor-protection), so the thermal-magnetic trip curve is shaped for feeder and distribution duty rather than motor inrush.
Auxiliary and release configuration
This unit ships with an undervoltage release (UVR) and a full complement of auxiliary switches: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ. The UVR trips the breaker when control voltage drops below a threshold — standard for safety circuits where loss of control power must open the feeder. The auxiliary switch stack gives the PLC or BMS a positive status feedback on breaker position (open/closed) and trip condition, without needing a separate contactor block.
Physical fit and environment
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for panelboard or enclosure mounting. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Power loss at rated current is 7.9 W maximum, which matters for thermal budgeting inside a sealed enclosure. The trip indicator is present for visual fault identification without opening the panel.