Siemens 3VA1163-4EE32-0AA0 — 63 A MCCB with TM220 release
The Siemens 3VA1163-4EE32-0AA0 is a SENTRON 3VA1 molded case circuit breaker, line-protection design, rated 63 A continuous at 40 °C ambient through 55 °C with no derating — 62 A at 55 °C, 60 A at 65 °C, 58 A at 70 °C. That thermal curve means you can load it to nameplate in a 55 °C panel without oversizing. Interrupting capacity runs 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. At 480 V systems the 52.5 kA at 440 V is the closest published point — expect a figure near that range. The 121 kA at 240 V gives headroom for high-fault panelboards downstream of a large transformer. Three-pole, no undervoltage release, no trip indicator, no communication function. The TM220 overcurrent release is the standard thermal-magnetic type — thermal for overload, magnetic for short-circuit. Front face carries IP40 protection; suitable for enclosure-mounted installation where the breaker face is accessible behind a door or cover.
Panel fit and integration
Dimensions: 130 mm height, 76.2 mm width (3 in), 70 mm depth (2.76 in). The 70 mm depth is shallow enough for most 200 mm deep enclosures without hitting the back panel or gland plate. Width at 76.2 mm matches standard 3-pole MCCB footprints on DIN-rail or panel-mount adapters; verify the mounting base if replacing a different manufacturer's breaker. Maximum power loss is 17.3 W. In a sealed enclosure with multiple breakers, that heat adds to the internal rise — factor it into the thermal budget if the panel runs near 55 °C ambient. Operating temperature range -25 °C to 70 °C; storage from -40 °C to 80 °C. The storage floor matters for unheated warehouses — this breaker can sit through a hard freeze without damage.