MLF1005LR39KT Equivalent & Substitute Parts

Part Overview

The MLF1005LR39KT is a 390 nH shielded multilayer inductor manufactured by TDK Corporation, designed for surface mount applications in the 0402 (1005 Metric) package. This component is rated for 50 mA maximum current with a DC resistance of 410 mOhm maximum and operates across the temperature range of -40°C to 85°C. The part carries a "Not For New Designs" status, indicating it has been superseded in TDK's product portfolio. Identifying equivalent substitute parts is essential for ongoing production support, legacy system maintenance, and design continuity where this inductor specification remains functionally appropriate.

Substiute Parts

MLF1005LR39KT

TDK CorporationIn Stock: 966MLF1005LR39KT Datasheet

Current PartRFQ

MLF1005GR39KT000

TDK CorporationIn Stock: 1017MLF1005GR39KT000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MLF1005LR39KT is determined by strict equivalence across the following critical parameters:

• Inductance Value: 390 nH at 10 MHz test frequency with ±10% tolerance
• Current Rating: 50 mA maximum
• DC Resistance: 410 mOhm maximum
• Package Specification: 0402 (1005 Metric) surface mount
• Shielding Configuration: Shielded multilayer construction
• Core Material: Ferrite
• Compliance Standards: ROHS3 Compliant, REACH Unaffected

The MLF1005GR39KT000 meets all these criteria and qualifies as a direct substitute. Both parts share identical electrical specifications, mechanical dimensions, and regulatory compliance status. The primary distinction is product lifecycle status: MLF1005LR39KT is marked "Not For New Designs," while MLF1005GR39KT000 carries "Active" status, indicating ongoing manufacturer support and availability.

Parameter Comparison

Engineering Selection Recommendations

The MLF1005GR39KT000 is the direct substitute for MLF1005LR39KT. Both components are manufactured by TDK Corporation and maintain identical electrical and mechanical specifications across all critical parameters. The MLF1005GR39KT000 offers an extended operating temperature range (-55°C to 125°C versus -40°C to 85°C), providing additional thermal margin in applications requiring broader environmental tolerance.

Selection between these parts should be based on product lifecycle requirements and supply chain considerations. The MLF1005LR39KT, marked "Not For New Designs," is appropriate for legacy system support and existing production runs where component qualification has already been completed. The MLF1005GR39KT000, with "Active" status, is the recommended choice for new designs, ongoing production, and applications where long-term manufacturer support and availability are required.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can MLF1005GR39KT000 be used as a direct replacement for MLF1005LR39KT in existing designs?

A: Yes. Both parts share identical inductance values (390 nH), current ratings (50 mA), DC resistance specifications (410 mOhm maximum), package dimensions (0402 / 1005 Metric), and core material composition (ferrite shielded multilayer). Electrical performance and mechanical fit are equivalent.

Q: What is the significance of the "Not For New Designs" status on MLF1005LR39KT?

A: This designation indicates the part has been superseded in TDK's active product line. While existing inventory remains available for legacy support, the manufacturer recommends MLF1005GR39KT000 for new design implementations and ongoing production.

Q: Are there differences in operating temperature ranges between these parts?

A: Yes. MLF1005LR39KT operates from -40°C to 85°C, while MLF1005GR39KT000 operates from -55°C to 125°C. If your application requires operation below -40°C or above 85°C, MLF1005GR39KT000 provides the necessary thermal coverage.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes. Both MLF1005LR39KT and MLF1005GR39KT000 are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.

Q: Are the physical dimensions and PCB footprints identical?

A: Yes. Both parts use the 0402 (1005 Metric) package with identical dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm) and maximum seated height of 0.022" (0.55mm). PCB footprints and assembly processes are interchangeable.

Q: What is the moisture sensitivity level for these inductors?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage practices apply without special desiccant or baking requirements.