What this MCCB is and what it does
The Siemens 3VA2163-5HL36-0BC0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across its full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. Its 3-pole design handles three-phase line protection, with a maximum breaking capacity of 187 kA at 240 V AC, stepping down to 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That spread tells you this breaker is built for high-fault installations where the available short-circuit current at the service entrance is substantial. It ships with an undervoltage release (UVR) and two auxiliary switches HQ integrated, so it's ready for remote status monitoring and undervoltage protection out of the box — no separate add-on modules to order and install.
Panel fit and integration
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard MCCB footprint for 63 A frame sizes, so it fits existing panel cutouts and busbar arrangements without modification. The 86 mm depth is the dimension from the mounting surface to the front of the breaker, important for enclosure depth clearance. Maximum power loss is 6.5 W, which keeps internal panel temperature rise manageable even in densely packed enclosures. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Selectivity and coordination note
The 63 A rating holds flat across the entire 40–70 °C ambient band, which simplifies coordination studies — no temperature-based derating curves to factor in for typical industrial panel environments. The 187 kA interrupting rating at 240 V gives ample headroom for most service-entrance applications, though the steep drop to 3.7 kA at 690 V means this breaker is best applied at 480 V or below for high-fault scenarios.