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Siemens 4EU4521-0CF10-0B — Line/Load Reactors

Siemens 4EU4521-0CF10-0B Commutating Choke, 516A, 480V, 0.14

MPN4EU4521-0CF10-0B

Siemens 4EU4521-0CF10-0B, commutating choke for converter, 3-phase, 480V AC, 516A rated, 0.14 mH, IP00, thermal class H, UL/CSA recognized.

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

Specifications

4EU4521-0CF10-0B — Inductance & Impedance
ParameterValue
Rated inductance0.00014H
Relative inductive voltage drop6%
4EU4521-0CF10-0B — Identification
ParameterValue
Product designationKommut.-Drossel f. Stromrichter
4EU4521-0CF10-0B — Electrical
ParameterValue
Rated operating voltage480, 480V
Number of phases3
Voltage typeAC
Rated operating frequency50 ... 60Hz
4EU4521-0CF10-0B — Losses & Thermal
ParameterValue
Power loss, coil (W)640W
Power loss, iron core (W)400W
Rated ambient temperature55°C
4EU4521-0CF10-0B — Approvals
ParameterValue
Thermal class (IEC 60085)H
4EU4521-0CF10-0B — Mechanical
ParameterValue
Main-circuit connection typeflat connector
IP protection ratingIP00
Height0.435m
Width0.46m
Depth0.293m

Product details

It carries a continuous rated current of 516 A at 480 V AC, 50/60 Hz, with an inductance of 0.14 mH (140 µH) and a relative inductive voltage drop of 6 % at rated current and frequency. That 6 % drop is the standard sizing for a line reactor — it limits di/dt and harmonic current without dropping so much voltage that the drive bus sags under load.

Thermal design and enclosure

Rated for a 55 °C ambient with thermal class H insulation (180 °C hot-spot limit per IEC 60085), so it handles the heat inside a crowded drive cabinet without derating at that ambient. Total power loss splits into 640 W in the coil and 400 W in the iron core — about 1 kW of heat to vent. The IP00 open-frame construction means it mounts inside a panel or enclosure that provides its own finger-safe cover; there is no integral housing.

Termination and approvals

Main current connections are flat-type terminals (bus-bar or cable-lug style), sized for the 516 A path. The choke carries UL and CSA recognition per EN 60289, so it is accepted for North American panels that require listed components.

Frequently asked questions

Where can I buy 4EU4521-0CF10-0B and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing.

What are the key electrical ratings of 4EU4521-0CF10-0B?

It is a 3-phase commutating choke rated 516 A continuous at 480 V AC, 50/60 Hz, with 0.14 mH inductance and a 6 % relative inductive voltage drop.

What compliance documentation does this choke carry?

The part is UL and CSA recognized per EN 60289, and is wound with thermal class H insulation per IEC 60085.

MPN
4EU4521-0CF10-0B