63 A MCCB with 187 kA interrupting capacity
The Siemens 3VA2163-5HL36-0HC0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current at 40 °C ambient, with a breaking capacity of 187 kA at 240 V AC. That interrupting rating drops to 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V — so the voltage class you're protecting determines which fault level this breaker can clear. It carries an ETU320 electronic trip unit and a built-in shunt trip (STL) for remote opening, plus two HQ auxiliary switches for status feedback.
Thermal derating and operating range
Rated continuous current holds at 63 A from 40 °C through 50 °C ambient. Above that it derates: 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The 4 W maximum power loss matters for enclosure heat budgeting in a sealed panel.
Line protection configuration
This variant is configured for line protection — no undervoltage release, no ground-fault monitoring, no phase-failure detection, no communication module. The ETU320 electronic trip unit handles overload and short-circuit protection with adjustable settings. The shunt trip (STL) allows a remote signal to trip the breaker, useful for emergency-stop circuits or supervisory shutdown. Two HQ auxiliary switches provide normally-open/normally-closed contacts for panel indication or PLC inputs.
Mechanical footprint and endurance
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for panel mounting. The 20,000-cycle mechanical endurance is typical for this class; the breaker is designed for fixed installation, not frequent switching duty. Rated insulation voltage is 800 V.