What the ratings mean for the panel
The 3VA1132-4EF32-0DH0 is a Siemens 3VA1 IEC frame 160 molded case circuit breaker with a breaking capacity class S rating of Icu=36kA at 415V AC. That 36kA interrupting rating means it can safely clear a fault current up to that level without rupturing — critical for main or feeder breakers in high-fault panels where the available short-circuit current exceeds 25kA. The 3-pole construction suits three-phase line protection. The TM240 thermal-magnetic trip unit provides overload protection adjustable from Ir=22A to 32A (In=32A fixed rating), and short-circuit protection set at Ii=5 to 10 times In. For a 32A breaker, that means the magnetic instantaneous trip can be dialed between 160A and 320A — useful for coordinating with downstream branch breakers or motor starters that have higher inrush. This variant ships with an undervoltage release (UVR) rated 208-230V AC 50/60Hz, two HQ auxiliary switches, and one HQ trip alarm switch. The UVR automatically trips the breaker when control voltage drops below about 70% of rated — standard for emergency-stop circuits or undervoltage protection on machine tools. The HQ auxiliary switches provide a positive-break contact for status feedback to a PLC or safety relay.
Sourcing and lifecycle
For BOM freeze or project planning: this part is specified into the Siemens 3VA1 platform, which is the current-generation IEC molded case breaker family replacing the older 3VL series. The 3VA1 line shares the same mounting footprint and accessory ecosystem, so panel layouts already using 3VL breakers can generally retrofit with a 3VA1 without re-drilling the backplate.
Deployment context
The 3VA1 frame 160 mounts on a standard DIN rail or can be screw-fixed to a backplate. In a typical 600mm-wide enclosure, you can fit up to four 3-pole units side by side with the required side-to-side clearance for heat dissipation. The nut keeper kit (included) simplifies panel wiring by holding the terminal nuts captive during conductor installation — a small time-saver when you're landing dozens of feeders. The UVR coil draws continuous power when the breaker is closed; factor that into your 24V DC control transformer sizing if the UVR is fed from the same supply as PLCs or relays. The HQ auxiliary switches are rated for 6A 250V AC, adequate for pilot-duty signaling to a 24V DC input card.