The Siemens SENTRON 3VA2063-5HN32-0BL0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting in a crowded enclosure. Its interrupting capacity reaches 187 kA at 240 V AC and 121 kA at 415/440 V, dropping to 75.6 kA at 500 V and 3 kA at 690 V — the 240 V figure is the one that governs for typical North American 480Y/277 V distribution panels where the available fault current at the line side can exceed 100 kA.
Built-in auxiliary and undervoltage release
This variant ships with two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type), plus an undervoltage release (UVR) — a complete signaling and shunt-trip package that eliminates the need for separate add-on modules on the DIN rail. The UVR drops the breaker when control voltage falls below the dropout threshold, which is standard for emergency-stop circuits and undervoltage protection schemes in machine-tool or conveyor lines.
The trip indicator is visible through the front cover, and the breaker accepts standard Siemens accessory kits for rotary handles, padlocking, and shunt-trip extensions.