What this part is and what it does
The Siemens SENTRON 3VA1116-1AA42-0AH0 is a 4-pole switch disconnector in the 3VA1 IEC frame 160 platform, rated for 160 A continuous current (Iu) with no integral overload or short-circuit protection — it is a pure disconnect, not a circuit breaker. Its job is to provide visible isolation of a downstream load for lockout/tagout, maintenance access, or branch-circuit disconnection in a panel. The part carries a rated insulation voltage (Ui) of 800 V and a maximum operational voltage of 690 V AC 50/60 Hz or 600 V DC, so it suits both AC distribution and DC bus circuits up to those levels. This unit ships with 2 auxiliary switches and 1 trip alarm switch (HQ type) factory-installed, giving three CO contacts for status feedback to a PLC or indicator lamp. The front terminals accept busbar connection — typical for a main-disconnect or panel-feed application where the switch ties directly to a busbar stack rather than individual cable lugs.
Short-circuit withstand and endurance
Because this is a switch disconnector without overcurrent trip elements, its fault-closing and short-time withstand ratings define the limits. The part is rated for 2 kA at both 1-second and 0.5-second intervals — meaning it must be backed by an upstream overcurrent protective device (fuse or MCCB) rated to limit let-through energy below that threshold. The mechanical endurance is 15,000 operating cycles, which is typical for a panel disconnect expected to see daily switching but not continuous high-speed operation.
Physical fit and panel integration
The 3VA1116-1AA42-0AH0 measures 70 mm deep, 101.6 mm wide, and 130 mm tall. The 101.6 mm width corresponds to a 4-pole frame in the 3VA1 series — it occupies the same DIN-rail or mounting-plate footprint as other 4-pole 3VA1 devices, so a panel laid out for a 4-pole 3VA1 MCCB can accept this switch disconnector without re-drilling. Front IP40 protection is adequate for enclosed panel mounting; the part is not rated for washdown or outdoor exposure.
Temperature range and power dissipation
Operating ambient range is -25 °C to +70 °C; storage range extends from -40 °C to +80 °C. Maximum power loss at rated current is 38 W — a relevant figure for thermal budgeting inside a sealed enclosure, particularly if multiple disconnectors or other heat sources are present. The motor-drive option (product extension optional) allows remote motorized operation for automated disconnection sequences.