The Siemens SENTRON 3VA1163-1AA36-0CH0 is a 3-pole switch disconnector in MCCB design, rated at 63 A continuously from 40 °C through 70 °C ambient — no derating needed across that span. It is built on the IEC frame 160 platform and ships without overload or short-circuit protection elements, so it functions purely as a load-break disconnect for isolation and switching duty. Rated operating voltage is 690 V AC and 500 V DC, with an insulation voltage of 800 V. The front face carries IP40 protection — suitable for enclosed panel mounting where the front is behind a door.
Undervoltage Release and Auxiliary Switching
This unit comes fitted with an undervoltage release (UVR) coil rated for 120–127 V AC 50/60 Hz. When control voltage drops below the dropout threshold, the UVR trips the disconnect open — standard for preventing automatic restart after a power loss on machinery where that would be a safety hazard. The auxiliary switch configuration includes 2 HQ auxiliary switches plus 1 HQ trip alarm switch, giving three CO contacts total for status feedback to a PLC or indication panel.
Mechanical Life and Power Loss
Typical mechanical service life is 15,000 operating cycles — adequate for isolation duty where the disconnect is operated a few times per shift, not for high-frequency motor starting. Maximum power loss is 38 W at rated current, which factors into enclosure thermal calculations if multiple units are ganged in a small cabinet.
Lifecycle and Sourcing
Storage temperature range is -40 °C to 80 °C; operating ambient is -25 °C to 70 °C. The mechanical service life is 15,000 cycles typical.