LPWI252010SR47T Equivalent & Substitute Parts

Part Overview

The LPWI252010SR47T is a 470 nH shielded thin film inductor manufactured by Littelfuse, designed for surface mount applications in the 1008 (2520 Metric) package. This component is rated for 4.1 A continuous current with a maximum DC resistance of 30 mOhm and operates across the temperature range of -40°C to 125°C. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity.

Substiute Parts

LPWI252010SR47T

LittelfuseIn Stock: 1007LPWI252010SR47T Datasheet

Current PartRFQ

TFM252012ALMAR47MTAA

TDK CorporationIn Stock: 2226TFM252012ALMAR47MTAA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPWI252010SR47T is determined by strict alignment of the following electrical and mechanical parameters:

• Inductance Value: 470 nH with ±20% tolerance
• Package / Case: 1008 (2520 Metric) surface mount form factor
• Shielding Type: Shielded construction
• Current Rating: Minimum 4.1 A continuous current capability
• DC Resistance: Maximum 30 mOhm
• Core Material: Metal composite or metal core construction
• RoHS Compliance: ROHS3 Compliant

The TFM252012ALMAR47MTAA from TDK Corporation meets all substitution criteria with equivalent inductance, package, and shielding specifications while providing improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The TFM252012ALMAR47MTAA is a direct functional substitute for the obsolete LPWI252010SR47T. Selection is supported by the following factors:

• Product Status: The TFM252012ALMAR47MTAA maintains Active product status with ongoing manufacturer support, whereas the LPWI252010SR47T is Obsolete.
• Compliance Certifications: Both components are ROHS3 Compliant. The TFM252012ALMAR47MTAA carries AEC-Q200 automotive qualification, providing additional reliability assurance.
• Electrical Performance: The substitute part delivers equivalent inductance and tolerance specifications while providing superior current handling (4.9 A vs. 4.1 A) and lower DC resistance (24 mOhm vs. 30 mOhm Max).
• Thermal Range: The TFM252012ALMAR47MTAA operates across -55°C to 150°C, exceeding the original part's -40°C to 125°C range.
• Physical Compatibility: Identical 1008 (2520 Metric) package and surface mount configuration ensure PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TFM252012ALMAR47MTAA be used as a direct replacement for the LPWI252010SR47T?

A: Yes. Both components share identical inductance values (470 nH), tolerance specifications (±20%), package form factors (1008 / 2520 Metric), and shielding characteristics. The substitute part meets or exceeds all electrical performance requirements of the original component.

Q: What are the key differences between these two inductors?

A: The TFM252012ALMAR47MTAA provides improved electrical performance with higher current rating (4.9 A vs. 4.1 A), lower DC resistance (24 mOhm vs. 30 mOhm Max), and extended operating temperature range (-55°C to 150°C vs. -40°C to 125°C). The substitute also carries AEC-Q200 automotive qualification and maintains Active product status.

Q: Are there any package or mounting differences?

A: No. Both components use the 1008 (2520 Metric) surface mount package with identical footprint dimensions (0.098" L x 0.079" W / 2.50mm x 2.00mm). The substitute part has a slightly greater seated height (0.047" vs. 0.039"), which must be verified against PCB clearance requirements.

Q: What compliance standards apply to both parts?

A: Both the LPWI252010SR47T and TFM252012ALMAR47MTAA are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). The TFM252012ALMAR47MTAA additionally carries AEC-Q200 automotive qualification and REACH Unaffected status.

Q: Is the inductance tolerance identical between the two parts?

A: Yes. Both components specify ±20% inductance tolerance at 1 MHz test frequency, ensuring equivalent circuit performance in applications where this tolerance is acceptable.