Lenze EZN3A0900H004 Mains Filter Class A 90A 480V
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Product Information
The Lenze EZN3A0900H004 is a 3-phase Class A mains filter designed for electromagnetic compatibility (EMC) and radio frequency interference (RFI) mitigation in industrial automation environments. Manufactured by Lenze as an external line accessory for the 9300 and 8200 Vector drive families, this filter suppresses high-frequency noise and line distortion conducted back into the electrical supply network. The unit supports continuous operating currents up to 90 A at an ambient temperature of 40°C and operates across system line voltages up to 3x 480 V AC at line frequencies from 48 Hz to 62 Hz. It is used in applications such as factory automation, material handling, packaging machinery, and textile manufacturing where electrical noise control is required.
Installation of the EZN3A0900H004 involves wiring the filter directly upstream of the drive controller input inside an enclosure. Featuring an IP00 ingress protection rating, the unit is constructed for open cabinet mounting and requires short, shielded conductors connecting the filter output terminals to the drive input to ensure proper EMC performance. Because the filter is a passive component, putting a replacement unit into service requires no parameter commissioning, firmware loading, or address configuration. Technicians need only verify phase wiring, line voltage limits, and terminal connections. ABC Industrial Parts can provide replacement units to assist maintenance teams in restoring compliant filtering on existing equipment.
Because this mains filter contains no active microprocessors, status LEDs, or built-in digital diagnostics, field inspection focuses on physical integrity and primary electrical measurements. First-line troubleshooting includes verifying input and output AC voltages across all three phases, checking ground conductor continuity, and inspecting terminal connections for thermal discoloration or mechanical looseness. Winding damage or insulation breakdown inside the unit cannot be serviced in the field, making complete module replacement or exchange the practical path to restoring machine operations. ABC Industrial Parts offers replacement units to minimize downtime when line filtering faults occur.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EZN3A0900H004 |
| Model / Type | Mains Filter Class A |
| Component Type | Mains Filter |
| Product Family | 9300 / 8200 Vector Series Accessories |
| Rated Current | 90 A at 40°C |
| Maximum Operating Voltage | 3x 480 V AC |
| Number of Phases | 3 |
| Operating Frequency Range | 48 - 62 Hz |
| Ingress Protection Rating | IP00 |
| EMC Standard Compliance | EN 55011 Class A / EN 61800-3 Category C2/C3 |
Replacement and Spare Part Considerations
When replacing a Lenze EZN3A0900H004 mains filter, confirm that the system operating voltage does not exceed 480 V AC and that the continuous load current remains within the 90 A rating at 40°C. Matching these fundamental electrical parameters is critical when maintaining legacy drive systems equipped with Lenze 9300 series servo inverters or 8200 Vector frequency inverters.
Because the filter carries an IP00 enclosure rating, it must be installed inside a protected control cabinet. To maintain compliance with EN 55011 Class A and EN 61800-3 Category C2/C3 standards, the physical distance between the filter output and the inverter input terminals should be minimized using shielded motor and line wiring with broad-area ground connections.
Since the component is passive and contains no firmware, memory, or communication interfaces, replacement is straightforward. Upstream isolation, proper phase torqueing on screw terminals, and verification of low-impedance grounding allow immediate re-energization without software backup or parameter transfer.
Frequently Asked Questions
Which drive series are compatible with the Lenze EZN3A0900H004 mains filter?
The EZN3A0900H004 mains filter is designed for integration with Lenze 9300 series servo inverters and Lenze 8200 Vector frequency inverters operating on 3-phase electrical networks up to 480 V AC.
Is software setup or parameter configuration needed when installing a replacement filter?
No configuration is required. The EZN3A0900H004 is a passive 3-phase electrical filter that operates without software, parameter memory, or digital interfaces.
What EMC standards does the EZN3A0900H004 mains filter satisfy?
When installed upstream of compatible drive controllers inside a control cabinet with short, shielded wiring, the unit provides compliance with EN 55011 Class A and EN 61800-3 Category C2/C3 standards.
How do maintenance technicians check the filter if a drive system fault occurs?
Technicians should measure 3-phase AC voltages at both input and output terminals, inspect power and ground terminals for proper torque, and verify that no physical damage or thermal discoloration is present on the filter housing.
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Specific firmware and hardware versions
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Disclaimer:
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