Motor Protection MCCB — 63 A, 330 kA IC at 240 V
The Siemens 3VA2163-7MN36-0KH0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for motor protection, rated 63 A continuously across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. Breaking capacity reaches 330 kA at 240 V, 242 kA at 415/440 V, and 187 kA at 500 V — high enough for most industrial fault-current scenarios downstream of a large transformer. At 690 V the rating drops to 3.7 kA, so this breaker is not a primary choice for 690 V systems unless the available fault current is known to be low. Phase failure detection is built in, and the motor-protection design curve coordinates with contactor/starter combinations to avoid nuisance trips on inrush.
Integrated Auxiliaries and Releases
Factory-fitted with a shunt trip release (STL) and an auxiliary switch block carrying 2 auxiliary switches plus 1 trip alarm switch (HQ) — covers remote tripping and status feedback without adding external modules. The basic switch itself is order code 3VA2163-7MN36-0AA0; the -0KH0 suffix adds the auxiliaries and shunt trip as a configured variant, saving panel wiring time. No undervoltage release fitted, no ground-fault monitoring, and no communication function — this is a straightforward motor-protection breaker, not a power-monitoring device.
Panel Fit and Environment
Dimensions: 105 mm wide, 181 mm high, 86 mm deep — fits standard SENTRON 3VA2 panel cutouts and busbar systems. Operating temperature range -25 °C to 70 °C; storage from -40 °C to 80 °C. Maximum power dissipation 4 W, manageable in a sealed enclosure without forced cooling. Trip indicator and voltage trigger are present — the indicator shows the breaker has tripped on fault, not just been switched off manually.