LINE FILTER LF-330 Equivalent & Substitute Parts

Part Overview

The KEMET LF-330 is a three-phase delta EMC/EMI line filter rated for 250VDC/VAC at 30A with two-stage configuration and chassis mount design using M4 threaded post termination. This component is classified as Last Time Buy, indicating discontinued production status. Organizations currently using the LF-330 require equivalent substitute parts to maintain supply chain continuity and support ongoing system maintenance and new installations.

Substiute Parts

LF-330

KEMETIn Stock: 923LF-330 Datasheet

Current PartRFQ

GTX-3300-Y103

KEMETIn Stock: 1179GTX-3300-Y103 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LF-330 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 30A minimum
• Mounting Type: Chassis Mount
• Configuration: Two Stage EMC/EMI filtering

Voltage Compatibility Consideration: The LF-330 operates at 250VDC/VAC. Substitute parts with higher voltage ratings (such as 500V) are electrically compatible in applications where the LF-330 is specified, as higher-rated components function safely in lower-voltage circuits.

Termination Style: The LF-330 uses M4 threaded post termination. Substitute parts may employ alternative termination methods (such as terminal blocks) provided the mechanical mounting interface accommodates the system design.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and appropriate regulatory certifications for the intended application.

Parameter Comparison

Engineering Selection Recommendations

GTX-3300-Y103 as Primary Substitute:

The KEMET GTX-3300-Y103 qualifies as the manufacturer-recommended substitute for the LF-330. Both components share identical filter topology (three-phase delta), configuration (two-stage), current rating (30A), and mounting methodology (chassis mount).

The GTX-3300-Y103 provides enhanced electrical specifications with 500V DC rating, accommodating the LF-330's 250V requirement with design margin. The extended operating temperature range (-25°C to 55°C versus -20°C to 55°C) supports broader environmental applications.

Product Status Advantage: The GTX-3300-Y103 maintains Active product status with 1083 units in current inventory, ensuring long-term availability compared to the LF-330's Last Time Buy classification.

Regulatory Compliance: The GTX-3300-Y103 carries cUL and UL certifications, providing additional regulatory documentation for applications requiring third-party approval verification.

Termination Interface Consideration: The GTX-3300-Y103 employs terminal block termination rather than M4 threaded posts. System integration requires mechanical interface assessment to confirm compatibility with existing mounting and connection infrastructure.

Frequently Asked Questions (FAQ)

Q: Can the GTX-3300-Y103 directly replace the LF-330 in existing applications?

A: The GTX-3300-Y103 is electrically and functionally equivalent to the LF-330 for three-phase delta EMC/EMI filtering at 30A. However, the termination style differs (terminal block versus M4 threaded post). Direct mechanical substitution requires verification that the system design accommodates terminal block connection methodology.

Q: Why does the GTX-3300-Y103 have a higher voltage rating (500V) than the LF-330 (250V)?

A: Higher voltage-rated components function safely in lower-voltage applications. The 500V rating of the GTX-3300-Y103 provides design margin and flexibility for use across multiple voltage platforms while maintaining full performance in 250V circuits.

Q: What is the significance of the LF-330's Last Time Buy status?

A: Last Time Buy designation indicates that KEMET has discontinued production of the LF-330. Existing inventory is available for final purchases, but no future production is planned. Organizations dependent on this component should transition to active alternatives such as the GTX-3300-Y103 to ensure supply continuity.

Q: Are there compliance differences between the LF-330 and GTX-3300-Y103?

A: Both components are ROHS3 compliant. The GTX-3300-Y103 carries additional cUL and UL certifications, which may be required for specific applications or regulatory jurisdictions. The LF-330's approval agency status was not specified in available documentation.

Q: How do the packaging formats differ?

A: The LF-330 is supplied in Box packaging, while the GTX-3300-Y103 is supplied in Bulk packaging. Packaging format selection depends on procurement volume and inventory management requirements.

Q: What operating temperature range should be considered for system design?

A: The LF-330 operates from -20°C to 55°C. The GTX-3300-Y103 extends the low-temperature specification to -25°C, providing additional margin for cold-environment applications. Both components share the same 55°C upper temperature limit.