SPD73-105M Equivalent & Substitute Parts Reference

Part Overview

The SPD73-105M is a 1 mH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 156 mA maximum current with 9.44 Ohm DC resistance. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility across inductance value, current rating, DC resistance, and operating temperature range while meeting the same mechanical form factor specifications.

Substiute Parts

SPD73-105M

API Delevan Inc.In Stock: 1108SPD73-105M Datasheet

Current PartRFQ

CDRH73NP-102MC-B

Sumida America Components Inc.In Stock: 951CDRH73NP-102MC-B Datasheet

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SRR0745A-102M

Bourns Inc.In Stock: 6506SRR0745A-102M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPD73-105M are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 1 mH (±20% tolerance maintained)
• Current rating: minimum 156 mA
• DC resistance: maximum 9.44 Ohm
• Core material: Ferrite
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Package footprint: 0.287" L x 0.287" W (7.30mm x 7.30mm)
• Inductance test frequency: 1 kHz

Identified Substitute Parts:

1. CDRH73NP-102MC-B (Sumida America Components Inc.) – Meets primary electrical specifications with 160 mA current rating and 9.44 Ohm DCR. Operating temperature range -40°C ~ 100°C is narrower than original. Height 0.134" (3.40mm) is within mechanical envelope. Active product status with RoHS3 compliance.

2. SRR0745A-102M (Bourns Inc.) – Exceeds primary electrical specifications with 200 mA current rating and superior 4.1 Ohm DCR. Operating temperature range -40°C ~ 125°C matches upper limit of original. Height 0.185" (4.70mm) remains within mechanical constraints. Active product status with RoHS3 compliance and AEC-Q200 rating.

Parameter Comparison

Engineering Selection Recommendations

CDRH73NP-102MC-B Selection Criteria:

This substitute provides direct electrical equivalence with 160 mA current rating and matching 9.44 Ohm DCR. The component is active in production with RoHS3 compliance, supporting modern supply chain requirements. The narrower operating temperature range (-40°C ~ 100°C) restricts use in applications requiring the full -55°C lower temperature specification of the original SPD73-105M. Height reduction to 0.134" (3.40mm) provides improved board-level clearance. Suitable for applications operating within the -40°C ~ 100°C envelope.

SRR0745A-102M Selection Criteria:

This substitute provides superior electrical performance with 200 mA current rating and reduced 4.1 Ohm DCR, delivering lower power dissipation in equivalent circuit applications. The component is active in production with RoHS3 compliance and AEC-Q200 automotive qualification. Operating temperature range -40°C ~ 125°C matches the upper specification limit of the original part. Height of 0.185" (4.70mm) remains within mechanical constraints but represents a 0.031" increase over the original. Suitable for applications requiring enhanced current handling and reduced resistive losses, with full upper temperature range compatibility.

Frequently Asked Questions (FAQ)

Q: Can CDRH73NP-102MC-B directly replace SPD73-105M in all applications?

A: CDRH73NP-102MC-B provides electrical substitution for applications operating within -40°C ~ 100°C. Applications requiring the -55°C lower temperature specification of SPD73-105M require alternative selection or thermal analysis to confirm performance at reduced temperatures.

Q: What is the primary advantage of SRR0745A-102M over the original SPD73-105M?

A: SRR0745A-102M provides 4.1 Ohm maximum DCR compared to 9.44 Ohm in SPD73-105M, reducing resistive power dissipation by approximately 57%. Current rating increases from 156 mA to 200 mA, providing design margin for higher-current applications.

Q: Are both substitute parts available in Tape & Reel packaging?

A: Yes. Both CDRH73NP-102MC-B and SRR0745A-102M are supplied in Tape & Reel (TR) packaging, supporting automated assembly processes. The original SPD73-105M packaging specification was not provided.

Q: Do the substitute parts maintain the same footprint as SPD73-105M?

A: Yes. All three parts share identical lateral dimensions of 0.287" L x 0.287" W (7.30mm x 7.30mm). Height variations exist: SPD73-105M at 0.154" (3.90mm), CDRH73NP-102MC-B at 0.134" (3.40mm), and SRR0745A-102M at 0.185" (4.70mm). All heights remain within typical surface mount component clearance specifications.

Q: Which substitute part is recommended for new designs?

A: Selection depends on application requirements. For thermal range compatibility with the original specification, SRR0745A-102M is preferred due to -40°C ~ 125°C operating range and active production status. For cost-optimized designs within -40°C ~ 100°C, CDRH73NP-102MC-B provides equivalent electrical performance.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both CDRH73NP-102MC-B and SRR0745A-102M are RoHS3 compliant. The original SPD73-105M is RoHS non-compliant, making substitution necessary for applications subject to RoHS requirements.

Q: What is the significance of AEC-Q200 rating on SRR0745A-102M?

A: AEC-Q200 certification indicates qualification for automotive applications under stress conditions. This rating is provided only for SRR0745A-102M and is not applicable to the original SPD73-105M or CDRH73NP-102MC-B.