SPD74-334M Equivalent & Substitute Parts

Part Overview

The SPD74-334M is a 330 µH shielded drum core wirewound inductor manufactured by API Delevan Inc. with a rated current of 500 mA and maximum DC resistance of 1.86Ohm. This part is classified as obsolete, making identification of suitable substitutes necessary for ongoing system maintenance and procurement continuity. The SPD74-334M series represents a nonstandard surface mount package configuration with ferrite core construction and operating temperature range of -55°C to 125°C.

Substiute Parts

SPD74-334M

API Delevan Inc.In Stock: 862SPD74-334M Datasheet

Current PartRFQ

HRSPD74-334M

API Delevan Inc.In Stock: 1075HRSPD74-334M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The HRSPD74-334M qualifies as a substitute for the SPD74-334M based on the following critical parameters:

Matching Parameters:

• Inductance: 330 µH (identical)
• Inductance Tolerance: ±20% (identical)
• Core Material: Ferrite (identical)
• Shielding: Shielded (identical)
• Mounting Type: Surface Mount (identical)
• Operating Temperature Range: -55°C ~ 130°C (covers original -55°C ~ 125°C specification)

Critical Differences:

• Current Rating: 300 mA (HRSPD74-334M) versus 500 mA (SPD74-334M)
• DC Resistance: 1.5Ohm Max (HRSPD74-334M) versus 1.86Ohm Max (SPD74-334M)
• Product Status: Active (HRSPD74-334M) versus Obsolete (SPD74-334M)

The HRSPD74-334M maintains the same inductance value and core configuration while offering improved performance characteristics through reduced DC resistance and extended temperature rating. However, the reduced current rating of 300 mA versus 500 mA represents a functional limitation that must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

The SPD74-334M is classified as obsolete, necessitating substitution planning for continued system support. The HRSPD74-334M from API Delevan Inc. is an active product offering identical inductance and core configuration characteristics.

Substitution Suitability:

• The HRSPD74-334M is suitable for applications where the 300 mA current rating satisfies system requirements. Applications requiring the full 500 mA current rating of the SPD74-334M will not function properly with the HRSPD74-334M.
• The HRSPD74-334M provides compliance advantages through active product status and higher temperature rating extension to 130°C.
• Both parts maintain RoHS non-compliant status and thus are equivalent from a regulatory compliance perspective.
• The HRSPD74-334M Tape & Reel packaging provides improved procurement flexibility compared to the SPD74-334M.
• Physical dimensions differ slightly (0.290" vs 0.287" length/width; 0.198" vs 0.185" height), requiring verification of mechanical fit in existing circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can the HRSPD74-334M directly replace the SPD74-334M in all applications? A: Direct replacement is valid only when application current requirements do not exceed 300 mA. Applications requiring 500 mA operation will not function properly with the HRSPD74-334M. Verify circuit current specifications before substitution.

Q: What are the critical differences between these two inductors? A: The primary differences are current rating (500 mA versus 300 mA), DC resistance (1.86Ohm versus 1.5Ohm), and product availability status (obsolete versus active). Physical dimensions also differ slightly. Inductance value and core shielding remain identical.

Q: Are there mechanical compatibility considerations? A: Yes. The HRSPD74-334M is 0.003" (0.07mm) larger in length and width, and 0.013" (0.33mm) taller than the SPD74-334M. Confirm board layout tolerances before installation, particularly in space-constrained applications.

Q: What is the significance of the different inductance test frequencies? A: The SPD74-334M specifies inductance measurement at 1 kHz, while the HRSPD74-334M uses 10 kHz. Both parts have identical inductance values at their respective test frequencies, indicating ferrite core design differences that maintain consistent inductance across the frequency range relevant to each part's application domain.

Q: Do both parts have the same RoHS compliance status? A: Yes. Both the SPD74-334M and HRSPD74-334M are classified as RoHS non-compliant, indicating they do not meet the Restriction of Hazardous Substances directive. Neither part offers compliance advantage from a RoHS perspective.

Q: What packaging options are available? A: The SPD74-334M uses standard bulk packaging. The HRSPD74-334M is supplied in Tape & Reel (TR) configuration, offering improved handling and automated assembly capability for production environments.