MLF1005LR12KT Equivalent & Substitute Parts

Part Overview

The MLF1005LR12KT is a 120 nH shielded multilayer inductor manufactured by TDK Corporation in the 0402 (1005 Metric) surface mount package. This component is rated for 140 mA maximum current with 590 mOhm DC resistance and operates across -40°C to 85°C. The part is marked as Not For New Designs, indicating it has been superseded in TDK's product portfolio. Identifying equivalent substitute parts is necessary for ongoing production support, legacy system maintenance, and design continuity where this inductor specification remains functionally required.

Substiute Parts

MLF1005LR12KT

TDK CorporationIn Stock: 762MLF1005LR12KT Datasheet

Current PartRFQ

MLF1005VR12JT

TDK CorporationIn Stock: 769MLF1005VR12JT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MLF1005VR12JT qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Inductance value: 120 nH (identical)
• Package type: 0402 (1005 Metric) (identical)
• Shielding: Shielded (identical)
• DC Resistance: 590 mOhm Max (identical)
• Q @ Frequency: 10 @ 25 MHz (identical)
• Self Resonant Frequency: 400 MHz (identical)
• Physical dimensions: 0.039" L x 0.020" W, 0.022" Max height (identical)
• RoHS3 Compliance: Yes (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Allowable Variations:

• Current Rating: MLF1005VR12JT rated at 180 mA versus MLF1005LR12KT at 140 mA (higher rating is acceptable for substitution)
• Tolerance: MLF1005VR12JT ±5% versus MLF1005LR12KT ±10% (tighter tolerance is acceptable)
• Operating Temperature: MLF1005VR12JT -55°C ~ 125°C versus MLF1005LR12KT -40°C ~ 85°C (wider range is acceptable)
• Product Status: MLF1005VR12JT is Active versus MLF1005LR12KT Not For New Designs (active status supports long-term availability)

Parameter Comparison

Engineering Selection Recommendations

The MLF1005VR12JT is a qualified substitute for the MLF1005LR12KT in applications requiring a 120 nH shielded multilayer inductor in 0402 surface mount packaging. Both components are manufactured by TDK Corporation and maintain identical electrical performance at the specified inductance value and frequency characteristics.

The MLF1005VR12JT offers superior long-term availability due to its Active product status, compared to the MLF1005LR12KT which is designated Not For New Designs. The substitute part provides enhanced specifications including higher current rating (180 mA versus 140 mA), tighter inductance tolerance (±5% versus ±10%), and extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C). These improvements ensure compatibility with existing designs while supporting broader operational conditions.

Both parts maintain identical RoHS3 compliance, moisture sensitivity classification, and physical dimensions, ensuring direct PCB compatibility without layout modifications. Selection between these parts should be based on design current requirements and long-term supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can MLF1005VR12JT directly replace MLF1005LR12KT on existing PCBs?

A: Yes. Both inductors share identical 0402 (1005 Metric) package dimensions, footprint, and mounting requirements. No PCB layout changes are required for substitution.

Q: What is the significance of the higher current rating on the substitute part?

A: The MLF1005VR12JT is rated for 180 mA maximum current compared to 140 mA on the MLF1005LR12KT. This higher rating provides additional design margin and is fully compatible with applications designed for the lower-rated original part.

Q: Does the tighter tolerance on MLF1005VR12JT affect circuit performance?

A: The MLF1005VR12JT maintains ±5% inductance tolerance versus ±10% on the MLF1005LR12KT. Tighter tolerance improves inductance accuracy and is compatible with designs specified for the original part's tolerance range.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified as Moisture Sensitivity Level 1 (Unlimited). Compliance certifications are equivalent.

Q: Why is the MLF1005LR12KT marked Not For New Designs?

A: This designation indicates the part has been superseded in TDK's product portfolio. The MLF1005VR12JT represents the active equivalent for ongoing production and new design applications.

Q: What is the operating temperature consideration for substitution?

A: The MLF1005VR12JT operates across -55°C ~ 125°C compared to -40°C ~ 85°C for the MLF1005LR12KT. The wider temperature range of the substitute part is fully compatible with designs specified for the original part's temperature range.