63 A MCCB with flat thermal derating and high fault-current capacity
The Siemens SENTRON 3VA2063-5HN36-0AG0 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 calculations in tight enclosures. Its interrupting capacity hits 187 kA at 240 V, dropping to 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V — the 240 V figure covers most North American 120/208 V and 277/480 V panelboard applications with ample headroom for high-fault locations like utility interfaces or large motor control centers. Rated insulation voltage is 800 V, so it's suited for 480/277 V and 600 V systems with margin; the line-protection design (not motor or feeder) means the trip curve is optimized for cable and busbar protection rather than motor inrush.
Footprint and auxiliary switch configuration
The breaker measures 105 mm wide by 181 mm tall by 86 mm deep — a 3-pole footprint that fits standard SENTRON panel cutouts and busbar arrangements. Depth of 86 mm (3.39 in) is shallow enough for most distribution boards without requiring deep enclosures. It ships with one auxiliary switch and one trip alarm switch (HP type) factory-installed, providing status feedback for PLC or building management inputs without additional wiring labor. No undervoltage release, no ground-fault monitoring, and no communication module on this variant — it's a straight line-protection breaker with basic signaling. Maximum power loss is 5.4 W, which keeps heat dissipation low enough for dense panel layouts without forced ventilation in most installations.
Lifecycle and sourcing
The base switch assembly carries order code 3VA20635HN360AA0; the -0AG0 suffix denotes the specific auxiliary switch and trip alarm configuration. For BOM matching, verify the auxiliary contact arrangement matches your existing panel wiring — the HP-type switch has a defined contact sequence that differs from standard auxiliary-only variants.
Environmental and compliance
Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C — suitable for unconditioned electrical rooms and outdoor enclosures in most climates. The 70 °C operating ceiling matches the flat derating curve, so no current reduction is needed even at the top of the range. As a Siemens SENTRON product, compliance documentation covers IEC/EN 60947-2, UL 489, CSA C22.2 No. 5, and CE marking. RoHS and REACH declarations are available from Siemens documentation portals.