LPWI252010S4R7T Equivalent & Substitute Parts

Part Overview

The LPWI252010S4R7T is a 4.7 µH shielded thin film inductor manufactured by Littelfuse, rated for 1.5 A continuous current with a maximum DC resistance of 245mOhm. This component is packaged in a 1008 (2520 Metric) surface mount form factor and operates across the industrial temperature range of -40°C to 125°C. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

LPWI252010S4R7T

LittelfuseIn Stock: 1090LPWI252010S4R7T Datasheet

Current PartRFQ

TMS252012ALM-4R7MTAA

TDK CorporationIn Stock: 3709TMS252012ALM-4R7MTAA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPWI252010S4R7T is determined by strict equivalence across the following critical parameters:

• Inductance Value: 4.7 µH with ±20% tolerance
• Package / Case: 1008 (2520 Metric) surface mount form factor
• Shielding Type: Shielded construction
• Core Material: Metal or metal composite composition
• Operating Temperature Range: -40°C to 125°C minimum
• RoHS Compliance: ROHS3 Compliant
• Moisture Sensitivity: MSL 1 or better

The substitute part TMS252012ALM-4R7MTAA from TDK Corporation meets all critical substitution criteria. This part maintains identical inductance, tolerance, package geometry, and environmental specifications while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The TMS252012ALM-4R7MTAA from TDK Corporation is a direct functional substitute for the obsolete LPWI252010S4R7T. Both components are ROHS3 compliant and maintain identical inductance specifications and package geometry. The TDK part offers superior electrical performance with lower DC resistance (200mOhm vs. 245mOhm) and higher current ratings (1.6 A vs. 1.5 A), making it suitable for applications requiring the original part's specifications.

The TDK substitute carries AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components. The marginal increase in seated height (1.20mm vs. 1.00mm) must be evaluated against specific PCB layout constraints, though the difference remains within typical assembly tolerances for 1008 form factor inductors.

Frequently Asked Questions (FAQ)

Q: Can the TMS252012ALM-4R7MTAA directly replace the LPWI252010S4R7T in existing designs?

A: Yes. Both parts share identical inductance values (4.7 µH ±20%), package dimensions (1008 / 2520 Metric), and operating temperature ranges (-40°C to 125°C). The substitute part meets or exceeds all critical electrical specifications of the original component.

Q: What is the significance of the height difference between these parts?

A: The TDK substitute has a maximum seated height of 1.20mm compared to 1.00mm for the Littelfuse original. This 0.20mm difference must be considered during PCB layout and assembly design to ensure clearance with adjacent components and solder reflow profiles.

Q: Why does the TDK part have lower DC resistance?

A: The TMS252012ALM-4R7MTAA achieves 200mOhm maximum DCR compared to 245mOhm for the LPWI252010S4R7T. This represents improved electrical efficiency and reduced power dissipation, providing a performance advantage in the substitute part.

Q: Is the AEC-Q200 rating on the TDK part relevant for non-automotive applications?

A: AEC-Q200 certification indicates automotive-grade reliability testing and qualification. This certification is beneficial for any application requiring high reliability, though it is not mandatory for non-automotive use cases.

Q: Are there any packaging or supply chain differences between these parts?

A: The LPWI252010S4R7T is obsolete with limited remaining inventory. The TMS252012ALM-4R7MTAA is an active product available in Tape & Reel (TR) packaging with established supply chain availability, making it the recommended choice for new designs and ongoing production.