What this MCCB delivers
The Siemens 3VA1163-5ED32-0AE0 is a SENTRON molded case circuit breaker rated for line protection with a TM210 thermal-magnetic release. It carries 63 A continuously at 40 °C (derated to 58 A at 70 °C) and interrupts up to 187 kA at 240 VAC — that is the figure that governs fault-clearing duty in a 240 V panel. At 415 V the interrupting rating is 121 kA, dropping to 75.6 kA at 440 V and 17 kA at 500/690 V, so the SCCR headroom depends on your system voltage. Three-pole construction with no undervoltage release and no auxiliary switch fitted as standard — the basic switch is order code 3VA11635ED320AA0, and the design allows up to four HQ auxiliary switches to be added later. Rated insulation voltage is 800 V, so it is comfortable in 400/480 V distribution without creepage concerns.
Thermal derating and panel fit
The 3VA1163-5ED32-0AE0 holds a full 63 A up to 50 °C ambient; above that it derates linearly to 58 A at 70 °C. That means in a tightly packed panel at 55 °C you have 62 A available — still enough for a 63 A bus if the load is below the curve. Power loss at rated current is 17.3 W maximum, so account for that heat in the enclosure thermal calculation. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into the existing SENTRON 3VA mounting base without rewiring. The 76.2 mm width (3 in) matches the panel cutout for earlier 3VA frames, so a swap from a 3VA1110 variant is a straight mechanical fit.