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Siemens 4EU4321-0AW00-0A — Line/Load Reactors

Siemens 4EU4321-0AW00-0A Commutating Choke, 1310A AC, 18µH

MPN4EU4321-0AW00-0A
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Siemens 4EU4321-0AW00-0A commutating choke for converter, 3-phase, 400V AC, 50Hz, 1310A AC max current, 18µH inductance, IP00 open-frame, Class H insulation.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

4EU4321-0AW00-0A — Inductance & Impedance
ParameterValue
Rated inductance0.000018H
Relative inductive voltage drop4%
4EU4321-0AW00-0A — Identification
ParameterValue
Product designationKommut.-Drossel f. Stromrichter
4EU4321-0AW00-0A — Electrical
ParameterValue
Rated operating voltage400V
Rated current (AC)1 179A
Number of phases3
Current (AC), max.1 310A
Rated current (DC)1 605.3A
Voltage typeAC
Rated operating frequency50Hz
Peak current1 638A
4EU4321-0AW00-0A — Losses & Thermal
ParameterValue
Power loss, coil (W)680W
Power loss, iron core (W)325W
Rated ambient temperature40°C
4EU4321-0AW00-0A — Approvals
ParameterValue
Thermal class (IEC 60085)H
4EU4321-0AW00-0A — Mechanical
ParameterValue
Main-circuit connection typeflat connector
IP protection ratingIP00
Height0.435m
Width0.46m
Depth0.265m

Product details

It handles a maximum AC current of 1,310 A and carries a rated inductance of 18 µH. Total power loss breaks down to 680 W in the coil and 325 W in the iron core, so plan for about 1 kW of heat rejection in the enclosure. The Class H insulation (180°C thermal class per IEC 60085) gives headroom for high-ambient or overload conditions, but the IP00 rating means this is an open-frame component — it needs a cabinet or panel for protection against dust and contact.

Sizing and integration

Footprint is 0.46 m wide by 0.435 m tall by 0.265 m deep. Flat-type terminals expect busbar or cable lugs. The DC rated current of 1,605.3 A is higher than the AC maximum, which is typical for a commutating choke — the DC link sees continuous current while the AC side sees the RMS of a pulsed waveform. If your converter's DC bus current exceeds 1,605 A, this choke saturates; size up.

Frequently asked questions

What is the physical size of 4EU4321-0AW00-0A?

Width 0.46 m, height 0.435 m, depth 0.265 m. Open-frame IP00 with flat-type terminals.

MPN
4EU4321-0AW00-0A