Lenze 390307 EZF3008A003 3-Phase EMC/RFI Mains Filter
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Product Information
The Lenze 390307, designated by model type EZF3008A003, is a 3-phase EMC/RFI mains filter engineered to suppress conducted electromagnetic interference in industrial drive installations. Operating within the Lenze RFI Mains Filters family, this component mitigates pulse-width modulation noise and switching harmonics generated by frequency inverters before feedback reaches the power grid. Rated for a continuous current of 8 A at a maximum supply voltage of 3x 500 V AC across dual 50 Hz and 60 Hz frequencies, it is specifically configured for compatibility with Lenze 8200 Vector frequency inverters and E82 series drive accessories to maintain power quality in electrical enclosures.
Integrating a replacement filter into an active control panel requires only physical mounting and terminal connections. Positioned directly between the incoming 3-phase mains supply line and the variable frequency drive input terminals, the module functions as a passive hardware barrier. Because the unit contains no digital circuitry or microprocessors, commissioning does not require software downloads, logic parameter programming, runtime adjustments, or firmware matching. When replacing an existing filter, technicians at ABC Industrial Parts can support line cross-referencing and technical verification to confirm seamless drop-in installation.
Because this passive filter does not feature active status displays or digital diagnostics, line-side electrical checks serve as the primary method for verifying performance. Operational troubleshooting involves measuring line-to-phase supply voltages up to 500 V AC, ensuring proper grounding continuity, and confirming that total full-load current stays within the 8 A continuous rating. Internal electrical breakdown within the filter housing is non-serviceable in the field, meaning that physical damage or internal component degradation requires direct unit replacement from ABC Industrial Parts to restore drive operation and mains noise isolation.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 390307 |
| Model / Type | EZF3008A003 |
| Component Type | EMC/RFI Filter |
| Product Family | RFI Mains Filters |
| Rated Continuous Current | 8 A |
| Maximum Supply Voltage | 3x 500 V AC |
| Mains Frequency | 50/60 Hz |
| Number of Phases | 3 |
| Lifecycle Status | Discontinued |
Replacement and Spare Part Considerations
When replacing a Lenze 390307 (EZF3008A003) mains filter, continuous load verification is essential. Ensure that the total input current required by the connected Lenze 8200 Vector drive does not exceed the filter's 8 A rating under full operating load. Operating connected drive equipment beyond this continuous rating can lead to excessive thermal stress, power line instability, or nuisance trips.
Although this filter model has been discontinued by the manufacturer, maintaining functioning filter units remains vital for protecting sensitive programmable logic controllers, communication networks, and electronic sensors connected to the same control mains supply line. Because replacement is entirely physical, replacing a failed module requires no software backup, memory transfer, or parameter download.
Frequently Asked Questions
What drive systems are compatible with the Lenze 390307 mains filter?
The Lenze 390307 (EZF3008A003) filter is specifically designed for compatibility with Lenze 8200 Vector frequency inverters and Lenze E82 series drive accessories.
Does the Lenze EZF3008A003 filter require any software or firmware configuration?
No. The EZF3008A003 is a passive line filter requiring no software, firmware, logic parameters, or field programming during installation.
What are the primary electrical power ratings for the Lenze 390307?
The filter supports a continuous current rating of 8 A, a maximum mains supply voltage of 3x 500 V AC, and operates on 3-phase 50 Hz or 60 Hz power systems.
How does the filter protect sensitive equipment on the same line?
It suppresses conducted electromagnetic noise and high-frequency switching interference generated by variable frequency drives, preventing electrical disturbance from feeding back into adjacent controllers and sensors.
Is the Lenze 390307 filter still actively manufactured?
No, the component has been discontinued by Lenze, making existing replacement modules essential for maintaining established production equipment.
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Data backup and recovery
Have you lost valuable parameters or data due to a malfunction while the manufacturer no longer provides support? At ABC Industrial Parts, we help you secure this data, both for common and specific products.
Specific firmware and hardware versions
If you are working with specific hardware or firmware versions that are no longer available from the manufacturer, ABC Industrial Parts is your partner. When making your enquiry, clearly state which versions you need, we will then look at the possibilities of supplying those versions, so that your installations continue to function optimally.
Disclaimer:
We are not an authorised distributor of Lenze.
Product photos are for illustration purposes only and may differ from the actual product delivered.
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