SPD74-352M Equivalent & Substitute Parts

Part Overview

The SPD74-352M is a 3.5 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications requiring moderate current handling and low DC resistance. This component operates across an industrial temperature range of -55°C to 125°C and is rated for 3.7 A continuous current with a maximum DC resistance of 34 mOhm.

The SPD74-352M is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing production support, design updates, or inventory replenishment when original stock becomes unavailable.

Substiute Parts

SPD74-352M

API Delevan Inc.In Stock: 745SPD74-352M Datasheet

Current PartRFQ

HRSPD74-352M

API Delevan Inc.In Stock: 1102HRSPD74-352M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD74-352M is determined by the following critical parameters:

Inductance Value: The substitute must maintain 3.5 µH with ±20% tolerance to ensure circuit performance equivalence.

Shielding Configuration: Both the main part and substitute must feature shielded construction to maintain electromagnetic isolation and prevent interference in sensitive applications.

Core Material: Ferrite core material is required to match thermal stability and frequency response characteristics.

Mounting Type: Surface mount configuration is mandatory for PCB assembly compatibility.

Package / Case: Nonstandard package classification must be maintained.

Inductance Test Frequency: 100 kHz test frequency ensures measurement consistency.

The HRSPD74-352M meets these core substitution criteria. However, differences exist in current rating, DC resistance, physical dimensions, operating temperature range, and product status that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

HRSPD74-352M as Substitute:

The HRSPD74-352M is electrically compatible with the SPD74-352M for applications where the current requirement does not exceed 2.6 A. Both components share identical inductance values, tolerance specifications, shielding configuration, and core material.

The HRSPD74-352M offers the following advantages:

• Active product status ensures ongoing availability and manufacturing support
• Lower DC resistance (25 mOhm vs. 34 mOhm) reduces power dissipation
• Extended operating temperature range (-55°C to 130°C vs. -55°C to 125°C) provides additional thermal margin
• Tape & Reel packaging enables automated assembly processes

Critical Limitation:

The HRSPD74-352M current rating of 2.6 A is lower than the SPD74-352M rating of 3.7 A. This component is unsuitable for applications requiring the full 3.7 A current capacity of the original part.

Physical Considerations:

Dimensional differences exist between the two components. The HRSPD74-352M is marginally larger in length and width (7.37mm vs. 7.30mm) and taller (5.03mm vs. 4.70mm). PCB layout verification is required to confirm mechanical fit within existing footprints.

Both components maintain RoHS non-compliant status and are subject to identical regulatory classifications (ECCN: EAR99).

Frequently Asked Questions (FAQ)

Q: Can the HRSPD74-352M replace the SPD74-352M in all applications?

A: No. The HRSPD74-352M is suitable only for applications where the circuit current requirement does not exceed 2.6 A. Applications requiring the full 3.7 A rating of the SPD74-352M cannot use this substitute without risking component saturation and performance degradation.

Q: What is the impact of the lower DC resistance in the HRSPD74-352M?

A: Lower DC resistance (25 mOhm vs. 34 mOhm) reduces resistive power loss in the inductor. This is a beneficial characteristic that improves efficiency. No circuit redesign is required to accommodate this parameter difference.

Q: Are the physical dimension differences significant?

A: The HRSPD74-352M is slightly larger in all three dimensions. The length and width differences are minimal (0.07mm each), but the height difference is more pronounced (0.33mm). PCB layout verification is necessary to confirm the component fits within the existing footprint and does not interfere with adjacent components or solder mask openings.

Q: What is the significance of the extended operating temperature range in the HRSPD74-352M?

A: The HRSPD74-352M operates to 130°C versus 125°C for the SPD74-352M. This 5°C extension provides additional thermal margin in high-temperature environments but does not alter circuit performance at standard operating temperatures.

Q: Why is the SPD74-352M classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The HRSPD74-352M, classified as active, represents the current production equivalent within the API Delevan SPD series family.

Q: Are there packaging differences between these components?

A: Yes. The SPD74-352M uses nonstandard packaging, while the HRSPD74-352M is supplied in Tape & Reel (TR) format. Tape & Reel packaging is compatible with automated pick-and-place assembly equipment, offering manufacturing process advantages.

Q: Do both components have the same regulatory compliance status?

A: Yes. Both the SPD74-352M and HRSPD74-352M are RoHS non-compliant and classified under ECCN: EAR99. No compliance differences exist between these components.