Switch disconnector, 100 A, 3-pole — SENTRON 3VA1 frame 160
The Siemens 3VA1110-1AA36-0AH0 is a SENTRON 3VA1 IEC frame 160 switch disconnector rated at 100 A continuous current (Iu) with 3 poles, designed for isolation and switching without built-in overload or short-circuit protection — it's a pure disconnect, not a molded case circuit breaker (MCCB). Rated insulation voltage is 800 V (Ui), with max operational voltage 690 V AC 50/60 Hz and 500 V DC, so it handles standard 400 V three-phase panels and 480 V industrial supplies comfortably. The front terminal clamp connection accepts copper conductors for the main circuit, and the auxiliary contact block includes 2 CO auxiliary switches plus 1 trip alarm switch, all HQ (high-quality) rated — useful for status feedback to a PLC or remote indication.
What the ratings mean for your panel
The 100 A continuous rating (Iu) at 70 °C max ambient means this disconnect can carry full load current in a warm enclosure without derating below 100 A. With 38 W maximum power loss at rated current, the heat dissipated inside the panel is modest but not negligible — allow natural convection clearance around the unit in a dense enclosure. IP40 on the front means the operator face is protected against solid objects over 1 mm (tools, wires) but not against water — install inside a panel with a higher-rated door or gland plate for wet environments. Mechanical endurance of 15,000 operating cycles (latching endurance) suits frequent manual switching in a production line isolation point.
Sourcing and lifecycle
No official successor order code exists — this is the active variant for the 100 A switch disconnector role in the 3VA1 frame 160 family.
Panel integration and wiring
Footprint: 130 mm height, 76.2 mm width (3-inch wide), 70 mm depth — fits standard 3-pole MCCB cutouts on a DIN rail or panel-mount adapter plate. Front terminal arrangement for main circuit conductors; auxiliary contacts are pre-wired with screw terminals — strip length and torque per Siemens installation manual (not reproduced here). Optional motor drive can be added (product extension optional) for remote switching — verify the drive catalog number separately.