What this MCCB carries — and what that means for the panel
The Siemens SENTRON 3VA1163-3EF36-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A at 40 °C, with a thermal-magnetic overcurrent release type TM240. The 63 A rating holds flat from 40 °C through 50 °C, then derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C — so in a warm enclosure you lose only a few amps before the thermal curve bites. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 75.6 kA at 240 V gives headroom for high-fault industrial services; the 11.9 kA at 690 V is still adequate for most 690 V distribution. The shunt trip (STL) auxiliary release lets you trip the breaker remotely, which is standard for emergency-stop or undervoltage schemes. Rated insulation voltage is 800 V. Power loss is 17.3 W maximum — factor that into your enclosure thermal budget.
Dimensions and panel fit
Width 76.2 mm, height 130 mm, depth 70 mm. The 76.2 mm width (3-inch footprint) is standard for a 3-pole MCCB in this class — drops into a typical panel cutout without surprises. No trip indicator on the front face; the voltage trigger is present, so the breaker signals when the shunt trip has fired.
What the TM240 release and shunt trip mean for coordination
The TM240 overcurrent release is a thermal-magnetic type with a 240 A frame rating — the breaker itself is 63 A, so the release is set for a lower continuous current within the frame's capacity. That means you can uprate the breaker later by swapping the release without changing the entire MCCB, as long as the frame and bus bars support it. The shunt trip (STL) is a separate auxiliary release that requires a control voltage to trip; it's not an undervoltage release (that's a different variant). The supplied basic switch is order code 3VA11633EF360AA0, which is the internal switching mechanism. No communication function, no ground-fault monitoring, no other measurement function — this is a plain line-protection MCCB with remote trip capability.