What It Is and What It Does
The Siemens SENTRON 3VA1163-1AA36-0DH0 is a 3-pole switch disconnector in MCCB design, part of the IEC frame 160 family, rated for a continuous current Iu of 63 A. It serves as a manual load-break disconnect for isolating circuits under load, with no overcurrent or short-circuit protection built in — that is, it is a switch, not a breaker. The front terminal connection accepts copper conductors for panel wiring, and the IP40 front protection keeps dust and tools out of the live parts inside the enclosure. Rated insulation voltage Ui is 800 V, with a maximum operational voltage of 690 V AC and 500 V DC. The unit occupies a 76.2 mm wide footprint.
Key Ratings and What They Mean for Fit
The 63 A rated continuous current (Iu) sets the maximum load the switch can carry continuously. The short-circuit making capacity is 2 kA. The undervoltage release (UVR) is factory-fitted for 208-230 V AC, 50/60 Hz. When supply voltage drops below the dropout threshold, the UVR trips the switch open — a standard safety feature for preventing automatic restart after a power loss on machinery. The auxiliary contact block provides 2 auxiliary switches (form C) plus 1 trip alarm switch (HQ), giving the control system status feedback on the switch position and whether it tripped on undervoltage. Mechanical endurance is rated at 15,000 operations. Power loss at rated current is 38 W maximum.
Where It Goes — Deployment Context
This switch disconnector is designed for mounting in a low-voltage switchgear or distribution panel. The 76.2 mm width and 70 mm depth fit standard DIN-rail or panel-mount footprints for the SENTRON 3VA platform. Front terminals simplify wiring access during panel build and maintenance. The IP40 front rating means it is protected against tools and solid objects larger than 1 mm, but not against water ingress — so it belongs inside a cabinet, not in a washdown area. Typical applications include main incoming isolation for sub-distribution boards and machine tool disconnect switches. The UVR makes it suitable for undervoltage protection.
Lifecycle and Sourcing Reality
For buyers needing to fill a BOM line or replace a failed unit, the 3VA1163-1AA36-0DH0 is a direct drop-in for any panel designed around the 3VA frame 160 switch disconnector family. The front terminal connection and auxiliary contact configuration are specified at order — verify the UVR voltage (208-230 V AC) matches the control supply before ordering.