Siemens 3VA2063-6HL32-0BL0 — 63 A MCCB with 242 kA interrupting capacity
The Siemens 3VA2063-6HL32-0BL0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current, with a massive 242 kA interrupting capacity at 240 V AC. That interrupting rating drops to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 3 kA at 690 V — so the 240 V figure is the headline, but the real-world performance at common industrial voltages is still well above what most distribution panels will ever see in a fault. It's a line-protection design, meaning it's built for feeder circuits, not motor protection with adjustable overloads. The 63 A rating holds flat from 40 °C all the way up to 70 °C ambient — no derating curve to chase in a hot enclosure. That's unusual for an MCCB; most start tapering above 40 °C. The part draws 7.9 W max power loss at rated load, so it won't cook the panel, but it's not negligible either — factor it into your thermal budget if you're packing several of these on a DIN rail. Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a 3-pole frame that fits standard 105 mm-wide panel cutouts. The depth is shallow enough that it won't interfere with gland plates or rear-panel wiring in most enclosures. It ships with an undervoltage release (UVR) and a complement of auxiliary switches: 2 auxiliary + 1 trip alarm + 1 electrical alarm switch, HQ design. That's a lot of status feedback for a line-protection breaker — useful if your PLC or BMS needs to know the breaker state without separate contactors.
Sourcing and lifecycle — active production, quoted to order
The basic switch assembly inside is order code 3VA20636HL320AA0, so if you're rebuilding a failed unit rather than replacing the whole breaker, that subcomponent is traceable. The UVR is built in, not a field-add kit — verify your control voltage matches before wiring.
Panel fit and integration notes
Mounts on a standard DIN rail or can be screw-mounted via the frame lugs — the 105 mm width is the standard 3-pole MCCB footprint across the SENTRON 3VA2 family. The 86 mm depth leaves room for rear-connected busbars or cable ducts behind the breaker. Spring-cage terminals accept solid or ferruled stranded up to the rated wire size; strip length per Siemens termination guidelines. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The 63 A rating is continuous across that entire operating band, as noted — so if your panel sits in an unventilated steel shed in summer, this breaker won't surprise you with a derate.
Comparison with 3VA2163-5HL32-0DB0
The closest functional peer is the 3VA2163-5HL32-0DB0. Both are 63 A, 3-pole SENTRON MCCBs with similar interrupting ratings. The key difference: the -0BL0 carries an undervoltage release and a full set of auxiliary/trip/alarm switches (2+1+1), while the -0DB0 typically ships with fewer auxiliaries and no UVR. If your panel requires the UVR for safe-start interlocking or emergency-stop chain, the -0BL0 is the correct BOM line. If you don't need the UVR and can add aux contacts separately, the -0DB0 may be a simpler fit. Footprint and mounting are identical — they swap without rewiring.