SPM5015T-R47M Equivalent & Substitute Parts

Part Overview

The SPM5015T-R47M is a 470 nH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 7 A continuous current with a maximum DC resistance of 17.9 mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is specified for 100 kHz inductance testing. The part is currently obsolete, making identification of suitable substitutes necessary for ongoing design support and production continuity.

Substiute Parts

SPM5015T-R47M

TDK CorporationIn Stock: 1295SPM5015T-R47M Datasheet

Current PartRFQ

SPM5015T-R47M-LR

TDK CorporationIn Stock: 1148SPM5015T-R47M-LR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SPM5015T-R47M-LR qualifies as a direct substitute based on the following critical parameters:

Inductance value remains constant at 470 nH with identical ±20% tolerance, ensuring equivalent filtering and energy storage characteristics. The core type, material composition, and shielding configuration are preserved, maintaining electromagnetic performance in the same frequency band (100 kHz test specification). Physical dimensions are identical (5.40 mm × 5.10 mm × 1.50 mm), confirming PCB layout compatibility and mechanical fit.

The substitute part demonstrates improved electrical performance: current rating increases from 7 A to 9 A, saturation current decreases from 13.8 A to 12 A, and DC resistance improves from 17.9 mOhm to 12.1 mOhm. These enhancements provide superior thermal performance and reduced power dissipation without compromising the original design intent. Operating temperature range, RoHS3 compliance, and MSL rating remain unchanged.

The primary distinction is product status: the original part is obsolete while the substitute is active, and packaging transitions from Cut Tape to Tape & Reel format.

Parameter Comparison

Engineering Selection Recommendations

The SPM5015T-R47M-LR is the appropriate substitute for the obsolete SPM5015T-R47M. Both parts maintain ROHS3 compliance and identical MSL ratings, satisfying regulatory and environmental requirements. The substitute's active product status ensures long-term availability and supply chain stability.

The substitute part's improved electrical characteristics—higher current rating, lower saturation current, and reduced DC resistance—provide operational margin without design modification. These improvements result in lower thermal dissipation and extended component reliability under identical circuit conditions.

Packaging transition from Cut Tape to Tape & Reel format may require adjustment to procurement and assembly processes but does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can SPM5015T-R47M-LR be used as a direct replacement in existing designs?

A: Yes. Identical inductance value, tolerance, core type, shielding, dimensions, and operating temperature range ensure direct substitution. The improved current rating and reduced DC resistance provide additional performance margin.

Q: What is the impact of the lower DC resistance in the substitute part?

A: Lower DC resistance (12.1 mOhm vs. 17.9 mOhm) reduces resistive losses and heat generation during operation. This improves efficiency and thermal performance without affecting the inductance or filtering characteristics.

Q: Are there packaging considerations when switching from the original to the substitute?

A: The original part is supplied in Cut Tape format while the substitute uses Tape & Reel packaging. This affects procurement, storage, and assembly line integration but does not impact electrical or mechanical performance.

Q: Why is the saturation current lower in the substitute part?

A: The saturation current specification reflects the core design and material properties. The lower saturation current (12 A vs. 13.8 A) in the substitute part is offset by the higher continuous current rating (9 A vs. 7 A), providing improved performance within normal operating conditions.

Q: Are both parts compliant with current environmental standards?

A: Yes. Both the original and substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.