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Siemens 4EU3931-1MA80-0A — Line/Load Reactors

Siemens SIDAC 4EU3931-1MA80-0A Filter Reactor, 139A, 400V, 5

MPN4EU3931-1MA80-0A

Siemens SIDAC 4EU3931-1MA80-0A, 3-phase filter reactor, rated 139 A / 154 A max, 400 V AC, 50 Hz, 14 % throttling factor, 100 kvar, IP00, screw/flat-type terminals.

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

Specifications

4EU3931-1MA80-0A — Inductance & Impedance
ParameterValue
Rated inductance0.00083H
Relative throttling factor14%
Filter resonant frequency134Hz
Rated reactive power (filter bank)100 000var
4EU3931-1MA80-0A — Identification
ParameterValue
Product designationfilter reactor
4EU3931-1MA80-0A — Electrical
ParameterValue
Rated operating voltage400V
Number of phases3
Voltage typeAC
Rated operating frequency50Hz
4EU3931-1MA80-0A — Losses & Thermal
ParameterValue
Total power loss (W)450W
Rated ambient temperature40°C
4EU3931-1MA80-0A — Approvals
ParameterValue
Thermal class (IEC 60085)H
4EU3931-1MA80-0A — Mechanical
ParameterValue
Main-circuit connection typeflat connector / screw-type terminals
IP protection ratingIP00
Height0.385m
Width0.41m
Depth0.229m

Product details

The 100 kvar reactive power rating and 134 Hz resonant frequency indicate a filter tuned for harmonic mitigation. The IP00 enclosure means it's an open-frame component — no drip shield, no finger guard. It mounts inside a cabinet, not on the wall in a wet area.

Thermal class H per IEC 60085 means the winding insulation can sustain 180 °C hot-spot temperature continuously. That's a full grade above the more common class F (155 °C). For a reactor dissipating 450 W of heat into the enclosure, class H gives you a wider safety margin if the panel runs warm or the duty cycle is heavy — you won't cook the winding as fast. Factor it into the thermal budget. The 40 °C ambient temperature rating is the standard IEC derating baseline. Derate current above that.

The reactor measures 0.229 m deep, 0.41 m wide, and 0.385 m tall. It bolts to a mounting plate.

MPN
4EU3931-1MA80-0A