What this MCCB is and what it protects
The Siemens SENTRON 3VA2110-6HN32-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. It is designed for line protection, meaning its primary job is to protect cable and bus runs from overloads and short circuits in a distribution panel or motor control center. Breaking capacity is 242 kA at 240 VAC, 187 kA at 415/440 VAC, 121 kA at 500 VAC, and 3.7 kA at 690 VAC. That 242 kA figure at 240 V means it can safely interrupt a fault current up to 242,000 amps without welding contacts or rupturing the case — critical for high-fault installations like large transformer secondaries or industrial service entrances.
Built-in accessories for control and signaling
This MCCB ships with an integrated undervoltage release (UVR) and two auxiliary switches (HQ type). The UVR trips the breaker when control voltage drops below a set threshold — standard for safety circuits that need to drop power on loss of control supply. The auxiliary switches provide status feedback (open/closed/tripped) to a PLC or indicator lamp without needing external limit switches. The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a 3-pole frame that fits standard SENTRON mounting footprints. Panel builders will find the depth manageable for shallow enclosures; the 86 mm dimension leaves room for cable bending radius behind the breaker.
Power loss and thermal management
Maximum power loss is 12.5 W at rated current. In a densely packed panel, that 12.5 W per breaker adds up — account for it in your enclosure thermal calculation, especially if multiple breakers are ganged. The operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.