What This Part Is and What It Does
The Siemens SENTRON 3VA1110-1AA42-0AB0 is a 4-pole switch disconnector in MCCB design rated for 100 A continuous at up to 70 °C ambient — no derating needed from 40 °C to 70 °C. Rated 690 V AC and 600 V DC, with a rated insulation voltage of 800 V. Main circuit connects via busbar at front terminals — no wire lugs, so it's sized for a busbar drop in a panel. This is a pure disconnect — no overload protection, no short-circuit protection, no undervoltage release, no trip indicator. It's a load-break switch designed for isolation and manual switching, not circuit protection.
Where It Fits in the Panel
Mechanical service life is 15 000 operating cycles typical — solid for a disconnect that sees once-per-shift or maintenance switching. The 2 HP auxiliary contacts (2 CO contacts) are built in, so you get status feedback without an add-on block. Dimensions: 130 mm high, 101.6 mm wide, 70 mm deep. Front face is IP40 — fine for a closed panel; not for washdown zones. Optional motor drive available if you need remote operation. Storage range is -40 °C to 80 °C; operating range -25 °C to 70 °C. The storage limit governs handling and shipping, not running conditions.
Lifecycle and Sourcing Reality
Maximum power loss is 38 W — account for that in the panel thermal budget if you're packing several disconnects in a small enclosure.