What this MCCB delivers on the line side
The Siemens 3VA1163-3EF36-0BH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 63 A at 40 °C and holds that rating through 50 °C before a gentle thermal derate begins — 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. That means in a warm enclosure you lose only 5 A from the nameplate, so the breaker stays in its thermal budget for most panel designs without upsizing. Interrupting capacity is specified at five voltage points: 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. These are the values a coordination study needs — the 415 V figure (52.5 kA) is the one most often checked for IEC 60947-2 installations on 400 V class systems. The 690 V rating (11.9 kA) confirms it can serve 690 V industrial networks where fault current is moderate. Rated insulation voltage is 800 V, giving headroom above the maximum operating voltage for creepage and clearance compliance. The 3-pole design suits three-phase feeders, and the built-in undervoltage release (UVR) lets the breaker drop out on loss of control voltage — useful for emergency-stop circuits or undervoltage protection schemes. Two auxiliary switches plus one trip alarm switch (HQ) provide status feedback to a PLC or indication panel without an external interface module.
Mounting and integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — the 70 mm depth is shallow enough to fit standard 200 mm deep enclosures with room for rear wiring gutters. The supplied basic switch is the core switching mechanism; the breaker ships with the undervoltage release and auxiliary switch block pre-assembled, so no field wiring of add-on modules is needed. Trip indicator gives a visual flag on the front face, speeding fault diagnosis without opening the panel door.