What it is and what it does
The Siemens 3VA1116-1AA36-0HA0 is a SENTRON switch disconnector in an MCCB (molded case circuit breaker) form factor — IEC frame 160, 3-pole, rated 160 A continuous. It provides a visible-break isolation point for a circuit, but carries no overload or short-circuit protection elements. The part is designed for applications where disconnection and isolation are the primary need, not overcurrent protection.
Key ratings and what they mean for fit
Rated at 160 A continuous from 40 °C through 50 °C ambient, it derates to 150 A at 70 °C — so in a warm panel (say 55 °C) you still have 158 A of headroom before the switch needs to be upsized. The rated insulation voltage is 800 V, and the maximum operating voltage is 690 V AC or 500 V DC, making it suitable for 400/480 V three-phase distribution as well as DC bus applications up to 500 V. The shunt trip release (STL) operates on 12-30 V DC or 24 V AC 50/60 Hz — a remote trip coil that lets a safety circuit or emergency-stop system open the disconnector without a manual handle pull. No undervoltage release is fitted, and there are no auxiliary contacts on this variant. Mechanical service life is 15,000 operating cycles typical — enough for a main disconnector cycled a few times a day over a decade, but not rated for frequent switching under load. Power loss at rated current is 38 W maximum, which factors into panel thermal budgeting.
Where it fits in the panel
The 3VA1116-1AA36-0HA0 uses front terminals for the main circuit connection, accepting lugs or cable lugs. Dimensions are 130 mm height, 76.2 mm width (standard 3-pole MCCB footprint), and 70 mm depth. The front face carries an IP40 protection class — suitable for enclosed panel mounting, not for washdown environments. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.