SPD74-472M Equivalent & Substitute Parts

Part Overview

The SPD74-472M is a 4.7 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 4.6 A continuous current with a maximum DC resistance of 38 mOhm. This component is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and procurement continuity. The part operates across the temperature range of -55°C to 125°C and is designed for surface mount applications in nonstandard packaging.

Substiute Parts

SPD74-472M

API Delevan Inc.In Stock: 1016SPD74-472M Datasheet

Current PartRFQ

HRSPD74-472M

API Delevan Inc.In Stock: 854HRSPD74-472M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD74-472M is determined by the following critical parameters:

Inductance Value: The substitute must maintain 4.7 µH with ±20% tolerance to ensure circuit performance within design specifications.

Core Material & Shielding: Both the main part and substitute utilize ferrite core material with shielding, ensuring electromagnetic compatibility and noise suppression characteristics remain consistent.

Mounting Type: Surface mount configuration must be preserved for PCB assembly compatibility.

Test Frequency: Both parts are characterized at 100 kHz, providing equivalent frequency response data for circuit analysis.

Current Handling: The substitute part must support the application's current requirements. The SPD74-472M is rated for 4.6 A continuous current; substitutes with lower current ratings require circuit-level evaluation to confirm suitability.

DC Resistance: Lower DCR values in substitutes reduce power dissipation and heat generation, representing an improvement over the original specification.

Operating Temperature: The substitute must cover or exceed the original temperature range to maintain reliability across all operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The HRSPD74-472M is an active production substitute manufactured by the same supplier, API Delevan Inc. This part maintains electrical equivalence in inductance value, tolerance, core material, and shielding characteristics. The substitute offers an extended operating temperature range (-55°C to 130°C versus -55°C to 125°C), providing improved thermal margin.

The primary design consideration is current rating: the HRSPD74-472M is rated for 2.15 A continuous current, compared to the original 4.6 A specification. Applications requiring the full 4.6 A rating must conduct circuit analysis to determine if the lower current rating is acceptable. The substitute exhibits superior DC resistance performance (30 mOhm Max versus 38 mOhm Max), reducing power dissipation.

Both parts carry identical RoHS non-compliance status. The substitute is available in standard Tape & Reel packaging, improving procurement and assembly efficiency compared to the nonstandard packaging of the obsolete part.

Frequently Asked Questions (FAQ)

Q: Can the HRSPD74-472M directly replace the SPD74-472M in all applications?

A: Electrical substitution is valid for inductance, tolerance, core material, and shielding. However, the current rating difference (2.15 A versus 4.6 A) requires circuit-level verification. If your application operates below 2.15 A, direct substitution is appropriate. Applications requiring higher current must be re-evaluated.

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

A: Lower DC resistance (30 mOhm Max versus 38 mOhm Max) reduces resistive losses and heat generation. This represents an improvement and does not create compatibility issues.

Q: Are there packaging considerations for substitution?

A: The SPD74-472M uses nonstandard packaging, while the HRSPD74-472M is supplied in standard Tape & Reel format. Verify that your assembly equipment and PCB footprint accommodate the substitute's physical dimensions (0.290" L x 0.290" W x 0.198" H versus 0.287" L x 0.287" W x 0.185" H).

Q: Does the extended temperature range of the substitute affect compatibility?

A: The HRSPD74-472M operates to 130°C versus 125°C for the original part. This extended range does not create compatibility issues and may provide additional design margin for thermally constrained applications.

Q: What is the significance of the product status difference?

A: The SPD74-472M is obsolete, making long-term procurement difficult. The HRSPD74-472M is in active production, ensuring availability and supply chain continuity.