What it is and what it does
The Siemens 3VA1116-1AA36-0DC0 is a SENTRON switch disconnector built in an MCCB-style housing — three poles, rated 160 A continuous at 40 °C, with a maximum operating voltage of 690 V AC or 500 V DC. Unlike a molded-case circuit breaker, this unit provides no overload or short-circuit protection; it's a straight disconnect for isolation and switching duty. The 38 W maximum power loss at rated load tells you the thermal budget inside a panel — factor that into enclosure sizing.
What the ratings mean for fit
Rated current holds flat at 160 A from 40 °C up to 50 °C, then derates to 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. If your panel ambient runs above 50 °C, you lose 2–10 A; plan your load margin accordingly. The 800 V rated insulation voltage and IP40 front protection suit it for standard industrial panel mounting — no washdown rating, so keep it behind a gland plate or enclosure door.
Built-in auxiliaries and release
Comes with an undervoltage release (UVR) for 208–230 V AC 50/60 Hz and two HQ auxiliary switches (form C contacts). The UVR trips the disconnector when control voltage drops — useful for emergency-stop chains or undervoltage protection schemes. The two auxiliary contacts give you status feedback without adding external relays. No communication function onboard; if you need remote monitoring, the optional motor drive (listed as available) lets you motorize the switch.
Mechanical and environmental limits
Rated for 15,000 mechanical operating cycles typical — solid for a switch disconnector in frequent-switching applications. Storage temperature range -40 °C to 80 °C; operating range -25 °C to 70 °C. Front terminal connection accepts cable lugs; dimensions 70 mm deep, 76.2 mm wide, 130 mm high — fits the standard 3-pole MCCB footprint on DIN rail or panel-mount.