SPM10040T-100M-HZ Equivalent & Substitute Parts

Part Overview

The SPM10040T-100M-HZ is a 10 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 8 A continuous current with a maximum DC resistance of 29.34 mOhm. This component is designed for surface mount applications in automotive and industrial environments, certified to AEC-Q200 standards. The part is classified as "Not For New Designs," making identification of functionally equivalent alternatives essential for ongoing production support and design flexibility.

Substiute Parts

SPM10040T-100M-HZ

TDK CorporationIn Stock: 2119SPM10040T-100M-HZ Datasheet

Current PartRFQ

SPM10040T-100M-HZR

TDK CorporationIn Stock: 5258SPM10040T-100M-HZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SPM10040T-100M-HZR qualifies as a functional substitute based on the following critical parameters:

Matching Parameters:

• Inductance value: 10 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• Core material and shielding: Metal, shielded construction
• Package dimensions: Identical 10.70mm x 10.00mm x 4.00mm footprint
• Operating temperature range: -40°C to 125°C
• Surface mount configuration
• AEC-Q200 certification
• RoHS3 compliance

Substitution Basis: The SPM10040T-100M-HZR maintains electrical equivalence through identical inductance specification and tolerance, matching physical footprint for PCB compatibility, and equivalent environmental ratings. Both components are wirewound inductors with metal shielded cores suitable for the same application classes.

Parameter Comparison

Engineering Selection Recommendations

The SPM10040T-100M-HZR is suitable as a substitute where the application current requirement does not exceed 6.5 A continuous operation. The main part's "Not For New Designs" status and active status of the substitute part support transition to SPM10040T-100M-HZR for ongoing production. Both components maintain AEC-Q200 automotive qualification and RoHS3 compliance, ensuring regulatory equivalence. The identical inductance value, tolerance, and physical footprint enable direct PCB substitution without layout modification. The increased DC resistance (32.3 mOhm vs. 29.34 mOhm) and reduced continuous current rating (6.5 A vs. 8 A) must be evaluated against specific circuit thermal and current demands.

Frequently Asked Questions (FAQ)

Q: Can SPM10040T-100M-HZR replace SPM10040T-100M-HZ in all applications?

A: Substitution is valid where the circuit operates at or below 6.5 A continuous current. Applications requiring the full 8 A rating of the original part require current derating analysis or alternative component selection.

Q: Are the physical footprints identical?

A: Yes. Both components share identical package dimensions of 10.70mm length, 10.00mm width, and 4.00mm height, enabling direct PCB footprint compatibility without layout changes.

Q: What is the impact of the increased DC resistance?

A: The SPM10040T-100M-HZR exhibits 32.3 mOhm maximum DC resistance compared to 29.34 mOhm for the original part. This 3 mOhm increase results in proportionally higher resistive losses and heat generation at equivalent current levels. Circuit thermal analysis is required to confirm acceptability.

Q: Are both parts automotive qualified?

A: Yes. Both SPM10040T-100M-HZ and SPM10040T-100M-HZR carry AEC-Q200 certification, meeting automotive reliability and environmental stress testing requirements.

Q: What packaging options are available?

A: The main part is supplied in Tape & Reel (TR) format. The substitute part is available in Cut Tape (CT) and Digi-Reel® packaging, offering flexibility for different procurement and assembly workflows.

Q: Why is the original part marked "Not For New Designs"?

A: This designation indicates the part is in mature or end-of-life phase. The SPM10040T-100M-HZR, with active status, represents the current production alternative from TDK Corporation for this inductance value and package class.