What this output reactor does in a drive line
The Siemens SIDAC 4EP4010-0PS10 is a 3-phase output reactor rated for 95 A maximum continuous current and a 4000 Hz switching frequency. It sits between the VFD output and the motor cable to limit the rate of voltage rise (dV/dt) and reduce reflected-wave peaks on long cable runs. The 0.000078 H inductance and 3.23 % impedance (UK) are sized for a 500 V AC line, with an 85.5 A rated continuous current (I LN). IP00 means no enclosure — it mounts inside a panel or cabinet where the reactor body is accessible only to qualified personnel. Free cable ends (no terminals) require the installer to provide lugs or a junction box.
Key ratings and what they mean for fit
The 4000 Hz switching frequency rating tells you this reactor is designed for IGBT-based drives running carrier frequencies up to 4 kHz. If your drive runs a higher switching frequency (e.g., 8 or 16 kHz), the core losses will increase — the 44 W iron-core loss figure is measured at the rated condition. The 95 A maximum current is the thermal limit at 40 °C ambient; derate above that. Thermal class B (130 °C) insulation means the winding can handle sustained hot-spot temperatures up to 130 °C without degrading. The coil loss of 36 W plus core loss of 44 W gives a total self-heating of about 80 W — factor that into your panel's cooling budget.
Physical integration and wiring
Dimensions: 0.21 m wide, 0.17 m tall, 0.14 m deep. Free cable ends — no screw terminals, no spring clamps. Strip and crimp your own lugs. Mounting is via the reactor's own chassis; no DIN-rail clip. IP00 means no ingress protection — keep it inside a cabinet rated at least IP54. The 3-phase connection is straightforward: line side from the drive output, load side to the motor cable. Verify the cable ends are long enough to reach the drive output terminals without strain.