What it is and what it does
The Siemens 3VA2110-5HL36-0BL0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full operating temperature range from -25 °C to 70 °C — no derating needed up to 70 °C ambient, which simplifies panel design in warm enclosures or near other heat sources. It's a 3-pole line-protection device, meaning it's built for feeder and distribution duty rather than motor protection — you'd use it on the incoming side of a panel or to protect a busway, not across a motor starter. The breaking capacity hits 187 kA at 240 V AC, 121 kA at 415/440 V, and still manages 75.6 kA at 500 V — high enough to sit behind a large transformer without worrying about cascading failure upstream.
What the ratings mean for your panel
The 100 A rating holds flat from 40 °C through 70 °C — no thermal derating curve to chase. That's unusual for a molded case breaker this compact (181 × 105 × 86 mm) and means you don't have to oversize the frame for a hot panel. The auxiliary switch block ships with 2 auxiliary switches, 1 trip alarm, and 1 electrical alarm switch — that's enough for remote status on a feeder breaker without adding a separate accessory module. It includes an undervoltage release (UVR) as part of the design — that's the coil that drops the breaker if control power fails, common in safety circuits and emergency-stop chains.
Mounting and integration
At 105 mm wide, it fits a standard 3-pole MCCB footprint — no special adapter plate needed for most panelboards or switchgear cubicles. Depth of 86 mm (3.39 in) means it clears most shallow enclosures; height of 181 mm (7.13 in) is typical for this frame class.