Lenze 398425 EZN3A0055H045 3-Phase Mains Choke
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Product Information
The Lenze 398425 (model EZN3A0055H045) is a 3-phase mains choke in the EZN Mains Chokes family designed for peak current suppression and mains harmonic reduction in motor drive applications. Built for operation on 50/60 Hz supply networks up to 500 V AC, this line reactor delivers a continuous current rating of 45 A with a nominal inductance of 0.55 mH. Featuring an IP00 protection rating, the device is built for open panel installation inside protective control cabinets where it smooths incoming line current and dampens destructive line spikes.
Interfacing directly on the mains supply side, the EZN3A0055H045 protects downstream drive components, such as those in Lenze 8200 vector frequency inverters and Lenze 9300 series servo controllers. As a passive inductive component, commissioning a replacement spare does not require software tools, parameter transfers, or firmware alignment. Putting a spare unit into service involves mounting the reactor securely within the enclosure, ensuring proper terminal torque, and verifying correct three-phase supply connections. ABC Industrial Parts can assist maintenance teams seeking tested replacement hardware to maintain line power quality.
Because the EZN3A0055H045 is a passive line reactor, status tracking depends on panel instruments and physical monitoring. Routine troubleshooting on machine lines should include checking three-phase voltage balance, terminal tightness, thermal conditions, and line stability. Internal coil damage or insulation breakdown within the inductive unit is non-serviceable in the field, making direct replacement through ABC Industrial Parts the standard route to prevent drive tripping and safeguard input rectifiers.
Technical Specifications
| Rated Current | 45 A |
| Nominal Inductance | 0.55 mH |
| Number of Phases | 3 |
| Maximum Supply Voltage | 500 V AC |
| Rated Frequency | 50/60 Hz |
| Protection Rating | IP00 |
| Component Type | Mains Choke / Line Reactor |
| Product Family | EZN Mains Chokes |
Replacement and Spare Part Considerations
When selecting a replacement mains choke, matching electrical ratings is essential to protect upstream power networks and connected inverter input stages. The replacement unit must match the continuous current capacity of 45 A, nominal inductance of 0.55 mH, and operating voltage rating up to 500 V AC. Selecting a unit with mismatched inductance or current ratings can lead to excessive voltage drops, elevated thermal dissipation, or inadequate harmonic filtering under full motor loads.
The Lenze 398425 (EZN3A0055H045) is commonly integrated line-side with Lenze 8200 vector frequency inverters and 9300 series servo drives across standard 3-phase 400 V, 480 V, and 500 V AC industrial supplies. Because the unit carries an open IP00 rating, panel installation must ensure sufficient enclosure ventilation and physical clearance to maintain passive cooling and avoid heat transfer to sensitive control electronics nearby.
Frequently Asked Questions
What is the continuous current rating of the Lenze 398425 mains choke?
The Lenze 398425 (EZN3A0055H045) has a continuous rated current of 45 A and a nominal inductance of 0.55 mH.
Which drive systems are compatible with the EZN3A0055H045 line reactor?
This mains choke is compatible with Lenze 8200 vector series frequency inverters, Lenze 9300 series servo controllers, and standard 3-phase 400 V, 480 V, and 500 V AC motor drive systems.
Is software configuration required when replacing this component?
No, the EZN3A0055H045 is a passive inductive device. It requires no software programming, parameter configuration, or firmware setup during installation.
What maximum supply voltage does the Lenze 398425 support?
The line reactor is rated for 3-phase AC supply voltages up to 500 V AC at 50/60 Hz grid frequencies.
What is the IP protection rating for the Lenze EZN3A0055H045?
The unit carries an IP00 protection rating, meaning it is designed strictly for open installation inside a protective control cabinet.
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