Mounting dimensions are 0.46 m wide by 0.435 m tall by 0.265 m deep. Protection class is IP00 — no enclosure, so it needs to live inside a panel or cabinet with adequate clearance and cooling. The 40 °C ambient temperature rating is the design point; derate current if cabinet ambient runs higher. Thermal class H insulation means the winding can handle 180 °C hot-spot temperature, which gives headroom for overloads. Terminals are flat-type connectors — expect bus-bar or heavy cable lugs, not screw-clamp terminals. UL and CSA recognition is confirmed, so it's accepted for North American panel builds under UL 508A.
Siemens 4EU4321-0EC00-0A Mains Choke, 531A, 400V, 3-Phase
MPN4EU4321-0EC00-0A
Siemens SIRIUS 4EU4321-0EC00-0A mains choke (line reactor) for variable-frequency drives, 3-phase, 400 V AC, 531 A rated current, 590 A max, 0.1 mH, 8% voltage drop, IP00, flat-type terminals, UL/CSA recognized.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Rated inductance | 0.0001H |
| Relative inductive voltage drop | 8% |
| Parameter | Value |
|---|---|
| Product designation | Netzdrossel f. FU |
| Parameter | Value |
|---|---|
| Rated operating voltage | 400V |
| Number of phases | 3 |
| Voltage type | AC |
| Rated operating frequency | 50Hz |
| Parameter | Value |
|---|---|
| Rated ambient temperature | 40°C |
| Parameter | Value |
|---|---|
| Thermal class (IEC 60085) | H |
| Parameter | Value |
|---|---|
| Main-circuit connection type | flat connector |
| IP protection rating | IP00 |
| Height | 0.435m |
| Width | 0.46m |
| Depth | 0.265m |
| Parameter | Value |
|---|---|
| Rated value | 531A |
Product details
Frequently asked questions
How do I get pricing and availability for 4EU4321-0EC00-0A?
This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current pricing and availability — no stock count or price is published here.
What compliance documentation does 4EU4321-0EC00-0A carry?
The part is UL and CSA recognized, and designed to EN 61558-2-20. RoHS and REACH compliance are standard for Siemens industrial products of this era, but specific declarations should be confirmed at quote time.
What are the key ratings of 4EU4321-0EC00-0A?
Rated current 531 A, maximum current 590 A, rated voltage 400 V AC, 3-phase, 50 Hz, inductance 0.1 mH, 8% voltage drop at rated current, thermal class H, IP00 protection.
MPN
4EU4321-0EC00-0A