LF-310 Line Filter Equivalent & Substitute Parts

Part Overview

The LF-310 is a three-phase (delta) EMC/EMI line filter manufactured by KEMET, rated for 250VDC/VAC at 10A with chassis mount configuration and threaded post (M4) termination. This component is classified as Last Time Buy, indicating discontinued production status. Finding equivalent or substitute parts is necessary to ensure continued availability for new designs, maintenance, and production continuity.

Substiute Parts

LF-310

KEMETIn Stock: 906LF-310 Datasheet

Current PartRFQ

GTX-3300-Y103

KEMETIn Stock: 1179GTX-3300-Y103 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LF-310 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Filter Type: Three Phase (Delta) configuration
• Configuration: Two Stage EMC/EMI filtering architecture
• Mounting Type: Chassis Mount

Electrical Compatibility Criteria:

• Voltage Rating: Must equal or exceed 250V DC/AC
• Current Rating: Must equal or exceed 10A
• Frequency Operating Range: Must support applicable frequency bands

Mechanical Compatibility Criteria:

• Termination Style: Must accommodate circuit integration requirements
• Operating Temperature: Must cover or exceed -20°C ~ 45°C range

Regulatory Compliance:

• RoHS3 Compliance required
• UL or equivalent approval agency certification

The GTX-3300-Y103 is identified as a manufacturer-recommended substitute based on matching filter type, configuration, and mounting requirements while exceeding voltage and current ratings.

Parameter Comparison

Engineering Selection Recommendations

GTX-3300-Y103 Substitution Suitability:

The GTX-3300-Y103 is an active product from KEMET with current manufacturing status, ensuring long-term availability compared to the LF-310 Last Time Buy status. Both components share identical filter type (three-phase delta), configuration (two-stage), and mounting methodology (chassis mount).

The GTX-3300-Y103 provides superior electrical performance with 500V DC rating and 30A current capacity, both exceeding LF-310 specifications. This higher rating envelope ensures compatibility in applications originally designed for the LF-310 without derating concerns.

Operating temperature range expansion (-25°C ~ 55°C versus -20°C ~ 45°C) provides broader environmental tolerance. Both components maintain ROHS3 compliance and UL certification standards.

Termination Consideration:

The primary design integration difference is termination style: LF-310 uses threaded post (M4) while GTX-3300-Y103 uses terminal block. Circuit board layout and connector compatibility must be evaluated during integration planning.

Regulatory Status:

GTX-3300-Y103 holds cUL and UL approvals, exceeding LF-310 single UL certification. REACH compliance status differs (GTX-3300-Y103 is REACH Unaffected versus LF-310 REACH Affected), which may influence supply chain documentation requirements.

Frequently Asked Questions (FAQ)

Q: Can GTX-3300-Y103 directly replace LF-310 in existing designs?

A: Electrical and functional compatibility is confirmed. Termination style differs (threaded post M4 versus terminal block), requiring mechanical integration assessment. Circuit board connector compatibility must be verified before implementation.

Q: What is the voltage derating impact when using GTX-3300-Y103 in a 250V application?

A: GTX-3300-Y103 is rated 500V DC, providing 2:1 voltage margin above the 250V application requirement. No derating is necessary; the component operates well within its rated envelope.

Q: Does the 30A current rating of GTX-3300-Y103 affect performance in a 10A circuit?

A: Higher current rating does not degrade performance in lower-current applications. The component is designed to handle 30A maximum; operation at 10A is within normal operating parameters.

Q: Are there temperature range implications for substitution?

A: GTX-3300-Y103 operating range (-25°C ~ 55°C) exceeds LF-310 range (-20°C ~ 45°C). Substitution maintains or improves thermal performance across all specified operating conditions.

Q: What packaging differences exist between these components?

A: LF-310 is supplied in Box packaging; GTX-3300-Y103 is supplied in Bulk packaging. Inventory management and handling procedures may differ accordingly.

Q: Are both components RoHS compliant?

A: Yes, both LF-310 and GTX-3300-Y103 are ROHS3 compliant, meeting environmental and regulatory requirements.

Q: What is the significance of Last Time Buy status for LF-310?

A: Last Time Buy indicates KEMET has discontinued production of LF-310. Existing inventory is limited (806 pcs reported). GTX-3300-Y103 active status ensures continued availability for future production requirements.