What the 36 kA breaking capacity means for your panel
The 3VA1132-4EF36-0JA0 is a Siemens 3VA1 IEC frame 160 molded case circuit breaker rated for 32 A continuous current with a breaking capacity of 36 kA at 415 V AC (class S). That 36 kA Icu tells you this breaker can safely interrupt a fault current up to that level without welding its contacts or rupturing the case — critical for panels where the prospective short-circuit current at the main distribution board is high. The TM240 thermal-magnetic trip unit gives you adjustable overload protection from 22 A to 32 A via an Ir dial, and a fixed magnetic short-circuit pickup adjustable between 5 and 10 times In (160 A to 320 A).
Shunt trip and auxiliary wiring
This variant ships with a factory-installed shunt trip (STL) rated for 110-127 V DC or AC 50/60 Hz. The shunt trip lets you remotely open the breaker from an E-stop circuit, a PLC digital output, or a fire-alarm relay — common in safety circuits where the breaker must drop power without an operator pulling the handle. The clamp (cage-clamp) connection terminals accept solid or ferruled stranded copper up to the frame's rated wire range, which speeds panel wiring versus traditional screw terminals.