Lenze 323330 3005b/32737 Mains Choke Transformer 5mH 9A
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Product Information
The Lenze 323330, also designated under part number 3005b/32737, is an industrial mains choke transformer engineered for power conditioning and drive protection within the Lenze Power Accessories family. Operating with a nominal inductance of 5 mH and a continuous current capacity of 9 A, this inline power choke attenuates line harmonic distortion and suppresses high-frequency electrical interference on primary AC supply lines. By smoothing current peaks on incoming lines, the transformer shields variable speed drives and frequency inverters against power grid spikes, phase unbalances, and voltage transients across packaging machinery, material handling, automotive manufacturing, and factory automation systems.
Integrating a replacement choke into a control cabinet involves matching the primary electrical supply to the unit's 9 A current rating and 5 mH inductance specification. As a passive inductive component, the module operates directly on the power line without requiring software setup, firmware installation, or digital parameter transfers. Installation requires verifying physical mounting alignment within the panel and making secure terminal connections to incoming and outgoing supply conductors. ABC Industrial Parts provides tested replacement units to help technicians quickly restore legacy drive installations without modifying existing wiring or panel dimensions.
Because this mains choke is a magnetic hardware component, it does not feature electronic status displays, diagnostic indicators, or integrated fault logging. Issues with line conditioning typically present as upstream inverter trips, excess line harmonic noise, or thermal breakdown under overloaded line conditions. First-line field checks should verify primary AC supply stability, confirm continuous line current does not exceed 9 A, and ensure all terminal connections are tightly torqued. If internal winding degradation or mechanical insulation failure occurs, field repair is not practical, and securing a tested exchange unit through ABC Industrial Parts offers the most reliable path back to full production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 323330 3005b/32737 |
| Component Type | Mains Choke Transformer |
| Product Family | Lenze Power Accessories |
| Inductance | 5 mH |
| Rated Current | 9 A |
| Lifecycle Status | Discontinued |
Replacement and Spare Part Considerations
The Lenze 323330 (3005b/32737) mains choke has reached discontinued status from the manufacturer. While functional successor lines such as modern Lenze ELN and EZN series mains chokes exist for newer control designs, keeping existing equipment operational often requires direct-fit legacy replacements to maintain exact cabinet layouts and existing busbar or cable lengths.
When selecting a spare or replacement choke for an existing drive system, maintaining the exact 5 mH nominal inductance and 9 A rated current parameters is crucial. Mismatched inductance or current ratings can reduce the effectiveness of harmonic filtering, increase stress on variable frequency drive input bridges, or cause thermal overload under full operating current.
Frequently Asked Questions
What primary function does the Lenze 323330 mains choke perform?
The Lenze 323330 (3005b/32737) serves as an inline mains reactor that filters harmonic distortion, limits peak mains current, and protects frequency inverters from voltage transients and power grid surges.
What key electrical ratings must be verified for a replacement unit?
A replacement choke must meet the nominal 5 mH inductance specification and the 9 A continuous current rating to ensure proper line protection and drive stability.
Does installing a replacement 323330 choke require any software or parameter setup?
No. The Lenze 323330 is a purely hardware-based mains transformer component and requires no software parameter configuration, programming, or firmware alignment.
What modern Lenze series serve as functional successors to this component?
Modern Lenze ELN and EZN series mains chokes act as functional successors for system upgrades, though direct replacement with a 323330 unit avoids panel re-engineering.
What basic checks should be performed if a connected drive shows power line faults?
Check line supply voltage levels, verify phase balance, confirm continuous current remains within the 9 A threshold, and inspect terminal connections for tight contacts.
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Data backup and recovery
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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.
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