SPD74-242M Equivalent & Substitute Parts

Part Overview

The SPD74-242M is a 2.4 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 4 A continuous current with 30mOhm maximum DC resistance. This component is classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing applications and new designs. The part operates across the industrial temperature range of -55°C to 125°C and is housed in a nonstandard surface mount package measuring 7.30mm × 7.30mm with a seated height of 4.70mm.

Substiute Parts

SPD74-242M

API Delevan Inc.In Stock: 1102SPD74-242M Datasheet

Current PartRFQ

HRSPD74-242M

API Delevan Inc.In Stock: 875HRSPD74-242M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The HRSPD74-242M is identified as a functionally compatible substitute based on the following critical parameters that determine substitutability:

Matching Parameters:

• Inductance: Both parts are rated at 2.4 µH with ±20% tolerance
• Core Material: Both utilize ferrite core construction
• Shielding: Both are shielded configurations
• Inductance Test Frequency: Both tested at 100 kHz
• Mounting Type: Both are surface mount devices
• Package Class: Both employ nonstandard package dimensions

Key Consideration: The HRSPD74-242M has a reduced current rating of 2.8 A compared to the original 4 A specification, along with improved DC resistance (20 mOhm maximum versus 30 mOhm maximum). These electrical characteristics must be evaluated against circuit requirements to determine acceptability within specific applications.

Parameter Comparison

Engineering Selection Recommendations

The HRSPD74-242M is an active production alternative to the obsolete SPD74-242M and shares identical inductance specifications at the same test frequency. Both components are RoHS non-compliant and maintain equivalent ferrite core shielded construction.

Selection between these parts is contingent upon current rating requirements. Applications operating at currents exceeding 2.8 A are not suitable for the HRSPD74-242M. The substitute offers superior DC resistance performance (20 mOhm versus 30 mOhm), which results in lower resistive losses in equivalent current operating conditions.

The HRSPD74-242M provides an extended maximum operating temperature of 130°C compared to 125°C, and is offered in standard Tape & Reel packaging for automated assembly processes. Physical footprint differences are minimal (7.37mm × 7.37mm × 5.03mm versus 7.30mm × 7.30mm × 4.70mm) and must be evaluated for PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the HRSPD74-242M directly replace the SPD74-242M in all applications?

A: Direct replacement is limited by the reduced current rating. The HRSPD74-242M is rated for 2.8 A maximum, while the original SPD74-242M is rated for 4 A. Replacement is suitable only in circuits where sustained current does not exceed 2.8 A.

Q: Are the physical dimensions of these inductors compatible on the same PCB?

A: The inductors have comparable nonstandard footprints with minimal variation. The HRSPD74-242M measures 7.37mm × 7.37mm × 5.03mm versus the SPD74-242M at 7.30mm × 7.30mm × 4.70mm. PCB land pattern compatibility must be verified for each design.

Q: What is the difference in DC resistance performance between these parts?

A: The HRSPD74-242M exhibits superior DC resistance at 20 mOhm maximum versus 30 mOhm maximum for the SPD74-242M. This 33% reduction in maximum resistance decreases power dissipation in equivalent current conditions.

Q: Is the HRSPD74-242M available in standard packaging formats?

A: The HRSPD74-242M is supplied in Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly. The original SPD74-242M does not specify a standard packaging format.

Q: How do the operating temperature ranges compare?

A: The HRSPD74-242M supports operation to 130°C maximum, extending the upper temperature limit by 5°C relative to the SPD74-242M at 125°C. Both components maintain the same -55°C lower temperature threshold.

Q: Are there RoHS compliance differences between these inductors?

A: Both the SPD74-242M and HRSPD74-242M are RoHS non-compliant. No compliance advantage exists for either component in regulated supply chain applications.