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Siemens 4EU3951-0AN18-4B — Line/Load Reactors

SIDAC 4EU3951-0AN18-4B Output Reactor, 110 A, 8 kHz, 0.3 mH

MPN4EU3951-0AN18-4B

SIDAC output reactor, 3-phase, 400 V AC, 110 A max, 8 kHz switching frequency, 0.3 mH, IP00, flat-type terminals, UL/CSA recognized.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

4EU3951-0AN18-4B specifications
ParameterValue
Type of voltageAC
Type of electrical connection for main current circuitflat connector
Power loss [W] of the coil500W
Power loss [W] of the iron core300W
Phase number3
Ambient temperature rated value40°C
Depth0.22m
Width0.41m
Height0.38m
Thermal class acc. to IEC 60085H
Rated value8 000Hz
Protection class IPIP00
Inductivity rated value0.0003H

Product details

What this output reactor does on the drive output

Its 0.3 mH inductance and 8 kHz switching frequency rating mean it is designed to sit between a variable-frequency drive and the motor, smoothing the PWM voltage spikes that would otherwise degrade motor winding insulation over time. The 8 kHz figure matches the typical carrier frequency of many general-purpose drives, so this reactor will fit a standard VFD output without derating the switching stage. Rated power loss splits into 500 W in the coil and 300 W in the iron core, totalling 800 W at full load. That heat must be managed: the IP00 enclosure (open frame) requires the panel builder to provide forced-air cooling or enough free-air volume to keep the ambient below the 40 °C rating. Thermal class H per IEC 60085 means the insulation system handles 180 °C hot-spot, which gives margin above the 40 °C ambient if airflow is adequate.

Fit and integration — what the dimensions mean for the panel

At 0.41 m wide, 0.38 m high, and 0.22 m deep, this reactor occupies a floor footprint of about 0.16 m² and stands about the height of a standard 16-module DIN-rail enclosure. The flat-type terminals accept busbar or cable lug connections typical of 110 A power circuits; plan for M8 or M10 ring lugs depending on your local code.

MPN
4EU3951-0AN18-4B