LF-315 Line Filter Equivalent & Substitute Parts

Part Overview

The LF-315 is a three-phase delta EMC/EMI line filter rated for 250VDC/VAC at 15A with chassis mount configuration and threaded post (M4) termination. This component is designated as Last Time Buy, indicating discontinued production status. Identification of equivalent and substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity for applications requiring three-phase line filtering functionality.

Substiute Parts

LF-315

KEMETIn Stock: 1120LF-315 Datasheet

Current PartRFQ

GTX-3300-Y103

KEMETIn Stock: 1179GTX-3300-Y103 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LF-315 is based on the following critical parameters that define functional equivalence within three-phase delta line filter applications:

Primary Substitution Criteria:

• Filter Type: Three Phase (Delta) configuration
• Configuration: Two Stage filtering topology
• Mounting Type: Chassis Mount mechanical interface
• Voltage Rating: Compatibility with system voltage requirements
• Current Rating: Capability to handle or exceed system current demands
• Regulatory Compliance: ROHS3 compliance and applicable certifications

The GTX-3300-Y103 qualifies as a substitute based on matching filter type, configuration, and mounting methodology. However, this substitute operates at elevated voltage and current ratings (500VDC, 30A) compared to the LF-315 (250VDC/VAC, 15A), making it suitable for applications requiring higher performance specifications or system upgrades.

Parameter Comparison

Engineering Selection Recommendations

LF-315 (Last Time Buy Status): The LF-315 remains the specified component for existing designs and applications with 250VDC/VAC, 15A requirements. Continued availability is limited due to Last Time Buy designation. Current inventory of 1019 pieces supports near-term procurement needs.

GTX-3300-Y103 (Active Product): The GTX-3300-Y103 is an active product suitable for new designs or system upgrades requiring three-phase delta line filtering. This substitute provides higher voltage (500VDC) and current (30A) ratings, expanded operating temperature range (-25°C minimum), and active cUL/UL certifications. Termination style differs (Terminal Block versus Threaded Post M4), requiring mechanical interface evaluation. Both components maintain ROHS3 compliance.

Selection between these components depends on system voltage/current specifications, termination compatibility, and certification requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can the GTX-3300-Y103 directly replace the LF-315 in existing applications?

A: Direct replacement requires verification of three factors: (1) system voltage and current specifications must not exceed GTX-3300-Y103 ratings (500VDC, 30A); (2) mechanical mounting interface must accommodate Terminal Block termination in place of Threaded Post (M4); (3) chassis layout and wiring must support the substitute component's physical dimensions and connection methodology.

Q: What are the key differences between LF-315 and GTX-3300-Y103?

A: Both components share three-phase delta filter type and two-stage configuration with chassis mount design. Differences include: voltage rating (250V versus 500V), current capacity (15A versus 30A), termination style (Threaded Post M4 versus Terminal Block), operating temperature minimum (-20°C versus -25°C), and product status (Last Time Buy versus Active). The GTX-3300-Y103 includes cUL and UL certifications not specified for the LF-315.

Q: Are both components RoHS compliant?

A: Yes, both the LF-315 and GTX-3300-Y103 are ROHS3 compliant. The LF-315 is REACH Affected; the GTX-3300-Y103 is REACH Unaffected.

Q: What is the significance of the Last Time Buy status for the LF-315?

A: Last Time Buy designation indicates the LF-315 is no longer in active production. Existing inventory (1019 pieces) represents the final available stock. New designs should specify the GTX-3300-Y103 or evaluate alternative active products to ensure long-term supply chain continuity.

Q: How do termination style differences affect substitution?

A: The LF-315 uses Threaded Post (M4) termination requiring threaded fastener connections. The GTX-3300-Y103 uses Terminal Block termination requiring different wiring and mounting hardware. Mechanical redesign of the connection interface is necessary for substitution.