Integrator note – 3VA2063-5HN32-0AF0
The Siemens 3VA2063-5HN32-0AF0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for continuous 63 A at 40–70 °C ambient — no derating across that span, which simplifies panel thermal budgeting. Three-pole construction, line-protection design, no undervoltage release, no communication function, and no ground-fault monitoring. The built-in 1 auxiliary switch plus 1 trip alarm switch HQ gives you a clean status signal back to the PLC or safety relay without an add-on module.
Breaking capacity – what the 121 kA at 415 V means for your panel
This MCCB delivers 187 kA at 240 V AC, 121 kA at 415 V AC, and 121 kA at 440 V AC — the same rating across the 415–440 V band, which is common in IEC 60947-2 installations. At 500 V it still holds 75.6 kA; at 690 V it drops to 3 kA. For a 63 A frame, 121 kA at 415 V is high-interrupting capacity — it clears a bolted fault upstream of a distribution transformer or a large motor bank without cascading to the main breaker. The rated insulation voltage is 800 V, so the breaker is electrically rated for 690 V systems even though the interrupting rating at that voltage is lower.
Mounting & integration
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. Fits standard SENTRON 3VA2 panel cutouts and busbar systems. The 86 mm depth includes the arc chamber and terminals — account for cable bending radius behind the panel door. Power loss is 5.4 W maximum at rated current, which matters for enclosed panels with limited natural convection.
Chain of custody note
This MCCB is a genuine Siemens SENTRON product. The basic switch variant is 3VA20635HN320AA0; the auxiliary switch configuration is 1 auxiliary switch + 1 trip alarm switch HQ. Verify the date code on the side label matches the production batch documentation when the part arrives — any mismatch is a red flag for gray-market diversion.