The Siemens 3VA1116-5EF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker from the 3VA1 series, rated for line protection with a TM240 thermal-magnetic trip unit.
Overload and short-circuit settings
The TM240 trip gives you an In of 160A, with overload protection adjustable from Ir=112A to 160A, so you dial in the continuous current to match the downstream load — a 150A feeder, for instance, lands at Ir=150A.
Deployment context
This breaker is built for panel-mount installation in distribution boards, motor control centers, or OEM machinery. The nut keeper kit simplifies mounting in tight enclosures where dropped hardware is a headache.