What this part is and what it does
The Siemens SENTRON 3VA1116-1AA36-0AF0 is a 3-pole switch disconnector in the 3VA1 IEC frame 160 family, rated for a continuous current of 160 A. It is designed as a pure disconnecting means — no overload or short-circuit protection built in, so it functions as a load-break switch rather than a circuit breaker. The 160 A rating means it can carry that current continuously in a panel without exceeding thermal limits, and the 3-pole configuration handles three-phase circuits up to 690 V AC or 500 V DC. The front terminal connection uses clamp-style terminals for the main circuit, and it ships with one auxiliary switch HQ plus one trip alarm switch HQ — that gives you two CO contacts total for status feedback or interlocking. The IP40 front protection means it's suitable for enclosed panel mounting where dust ingress is limited, but not for washdown environments.
What the ratings mean for fit
The 70 mm depth, 76.2 mm width, and 130 mm height match the standard 3VA1 frame footprint — it occupies the same DIN-rail or mounting-plate space as a 3-pole MCCB in that frame. The 160 A rated continuous current (Iu) is the thermal limit; for a motor feeder or distribution circuit, size your upstream protection and conductor ampacity to at least that value. The 38 W maximum power loss at rated current means it dissipates heat into the enclosure — factor that into your thermal derating if the panel is tightly packed. The 2 kA limited short-time withstand (both 1 s and 0.5 s ratings) tells you this switch disconnector can hold closed under a fault current up to 2 kA for those durations — it's not a high-fault-rated device, so it needs upstream overcurrent protection that clears faults below that level. The 15 000 mechanical endurance cycles (latching) is typical for a switch disconnector in this class; it's rated for frequent switching in normal service.
Deployment context
This switch disconnector is used in distribution panels and motor control centers where a visible-break isolating point is required for safe maintenance. The optional motor drive (listed as a product extension) allows remote operation, but this base unit ships without one. The absence of undervoltage release and communication function means it's a straightforward manual disconnect — no auxiliary electronics to fail.