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Siemens 4EU3921-7AA00-0A — Line/Load Reactors

Siemens 4EU3921-7AA00-0A Commutating Choke, 560A, 690V, 3-Ph

MPN4EU3921-7AA00-0A

Siemens SIRIUS 4EU3921-7AA00-0A commutating choke for converters, 3-phase, AC 690V, 560A max / 504A rated, 0.084 mH, IP00, thermal class H.

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

Specifications

4EU3921-7AA00-0A — Inductance & Impedance
ParameterValue
Rated inductance0.000084H
Relative inductive voltage drop4%
4EU3921-7AA00-0A — Identification
ParameterValue
Product designationKommut.-Drossel f. Stromrichter
4EU3921-7AA00-0A — Electrical
ParameterValue
Rated operating voltage690V
Number of phases3
Rated current (DC)686.2A
Voltage typeAC
Rated operating frequency50Hz
4EU3921-7AA00-0A — Losses & Thermal
ParameterValue
Power loss, coil (W)375W
Power loss, iron core (W)220W
Rated ambient temperature40°C
4EU3921-7AA00-0A — Approvals
ParameterValue
Thermal class (IEC 60085)H
4EU3921-7AA00-0A — Mechanical
ParameterValue
Main-circuit connection typeflat connector
IP protection ratingIP00
Height0.385m
Width0.41m
Depth0.229m

Product details

It handles 560 A maximum continuous current at 690 V AC, 50 Hz, with a rated inductance of 0.084 mH and a relative inductive voltage drop of 4% at rated current. Thermal class H (180 °C) insulation per IEC 60085 gives headroom for sustained operation at the 40 °C ambient rating.

The 560 A maximum rating is the thermal limit under the listed conditions — the choke can carry this continuously without exceeding the temperature rise of the H-class insulation. The 504 A rated value is the nominal current at which the 4% inductive voltage drop is specified. For a 690 V drive line, this choke introduces about 27.6 V drop at rated load, which is typical for a 4% impedance reactor. The DC rating of 686.2 A applies when the choke is used in a DC link circuit — higher than the AC rating because there is no skin effect or core heating from AC ripple. For a 3-phase 690 V converter pulling 500 A continuous, this choke is correctly sized; a 560 A drive would push the choke to its thermal limit.

Physical integration and connections

Dimensions: 0.41 m wide, 0.385 m tall, 0.229 m deep. Main current circuit uses flat-type connectors. IP00 rating requires mounting inside a clean, dry enclosure. Power loss totals 375 W in the coil and 220 W in the iron core.

MPN
4EU3921-7AA00-0A