What this MCCB is and what it does
The Siemens SENTRON 3VA2010-6HN32-0BL0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, designed for line protection in distribution panels. Its 242 kA breaking capacity at 240 VAC means it can safely interrupt fault currents up to that level without upstream damage — critical for high-fault installations like transformer secondaries or large motor control centers. The breaker includes an undervoltage release (UVR) that trips the mechanism when supply voltage drops below a set threshold, protecting downstream equipment from brownout conditions.
Breaking capacity across voltage levels
Breaking capacity drops with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. For a 480 V panel, the 187 kA rating gives substantial SCCR headroom for most industrial service entrances. At 690 V the 3 kA figure is a hard limit — verify available fault current if feeding a 690 V drive bus.
Thermal performance and auxiliary configuration
The breaker holds its full 100 A rating across the entire operating temperature range from -25 °C to 70 °C — no derating needed for warm enclosures. Maximum power loss is 16 W. The auxiliary switch block includes 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ type), giving four discrete signals for status monitoring or PLC inputs. The undervoltage release is factory-fitted; no field retrofit required.
Physical footprint and panel fit
Dimensions are 86 mm deep, 105 mm wide, and 181 mm high. The 105 mm width is standard for 3-pole MCCBs in this class — it fits existing SENTRON mounting bases and busbar systems without adapters. The trip indicator window is present for visual status at a glance.