MLF1005LR18K Equivalent & Substitute Parts

Part Overview

The MLF1005LR18K is a 180 nH shielded multilayer inductor manufactured by TDK Corporation, designed for surface mount applications in the 0402 (1005 Metric) package. This component operates across a temperature range of -40°C to 85°C with a maximum DC resistance of 760mOhm and supports a current rating of 120 mA. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Inductance	180 nH
Tolerance	±10%
Current Rating	120 mA
DC Resistance (DCR)	760mOhm Max
Shielding	Shielded
Package / Case	0402 (1005 Metric)
Operating Temperature	-40°C ~ 85°C
Material - Core	Ferrite
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the MLF1005LR18K is determined by strict equivalence across the following parameters:

Inductance value: 180 nH with ±10% tolerance
Package / Case: 0402 (1005 Metric) surface mount form factor
Core material: Ferrite shielded construction
Operating temperature range: -40°C to 85°C minimum
Physical dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm)

The substitute part MLF1005VR18KT000 meets all these core requirements. Variations in current rating, DC resistance, and Q factor are permissible when the substitute part maintains or exceeds the performance envelope of the original component.

Parameter Comparison

Parameter	MLF1005LR18K (Main)	MLF1005VR18KT000 (Substitute)	Compatibility
Inductance	180 nH	180 nH	Equivalent
Tolerance	±10%	±10%	Equivalent
Current Rating (Amps)	120 mA	160 mA	Substitute exceeds requirement
DC Resistance (DCR)	760mOhm Max	720mOhm Max	Substitute improves performance
Shielding	Shielded	Shielded	Equivalent
Package / Case	0402 (1005 Metric)	0402 (1005 Metric)	Equivalent
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Equivalent
Material - Core	Ferrite	Ferrite	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Q @ Freq	10 @ 25MHz	15 @ 25MHz	Substitute improves performance
Frequency - Self Resonant	320MHz	320MHz	Equivalent
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	Equivalent
Height - Seated (Max)	0.022" (0.55mm)	0.022" (0.55mm)	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

The MLF1005VR18KT000 is the direct substitute for the obsolete MLF1005LR18K. Both components are manufactured by TDK Corporation within the MLF series and maintain identical electrical specifications for inductance, tolerance, and operating temperature range. The substitute part is classified as active product status, ensuring ongoing availability and supply chain continuity.

The MLF1005VR18KT000 demonstrates improved electrical performance characteristics: current rating increases from 120 mA to 160 mA, DC resistance decreases from 760mOhm to 720mOhm maximum, and Q factor improves from 10 to 15 at 25 MHz. These enhancements do not introduce incompatibility; they represent superior performance within the same functional envelope.

Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity classification (MSL 1). Physical form factor, package type, and mounting configuration are identical, permitting direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can MLF1005VR18KT000 be used as a direct replacement for MLF1005LR18K in existing designs?

A: Yes. Both components share identical inductance (180 nH), tolerance (±10%), package (0402 / 1005 Metric), operating temperature range (-40°C to 85°C), and physical dimensions. The substitute part meets or exceeds all electrical requirements of the original component.

Q: What is the difference in packaging between these two parts?

A: MLF1005LR18K is supplied in Cut Tape (CT) & Digi-Reel® format. MLF1005VR18KT000 is supplied in Tape & Reel (TR) format. Both are compatible with standard surface mount assembly equipment; packaging format selection depends on production volume and handling requirements.

Q: Does the improved current rating of MLF1005VR18KT000 affect circuit behavior?

A: No. The higher current rating (160 mA versus 120 mA) indicates the substitute part can safely handle greater current without saturation. In circuits designed for the original 120 mA specification, this improvement provides additional design margin without altering circuit function.

Q: Are there compliance or certification differences between these parts?

A: No. Both components are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity). Regulatory and environmental compliance status is identical.

Q: Why is the DC resistance lower in the substitute part?

A: The MLF1005VR18KT000 exhibits 720mOhm maximum DC resistance compared to 760mOhm in the MLF1005LR18K. This represents improved component performance and results in lower resistive losses in the inductor, which is beneficial for circuit efficiency.

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