SPD74-154M Equivalent & Substitute Parts

Part Overview

The SPD74-154M is a 150 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 700 mA continuous current with a maximum DC resistance of 880 mOhm. This component operates across the temperature range of -55°C to 125°C and is designed for surface mount applications in nonstandard package configurations.

The SPD74-154M carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this inductor specification.

Substiute Parts

SPD74-154M

API Delevan Inc.In Stock: 940SPD74-154M Datasheet

Current PartRFQ

HRSPD74-154M

API Delevan Inc.In Stock: 1135HRSPD74-154M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD74-154M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 150 µH (exact match required)
• Inductance tolerance: ±20% (exact match required)
• Core material: Ferrite (exact match required)
• Shielding: Shielded (exact match required)
• Mounting type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

• Current rating: Substitute must meet or exceed the application requirement
• DC resistance: Substitute must not exceed the maximum specified value
• Operating temperature range: Substitute must cover or exceed the required operating window
• Package dimensions: Physical compatibility with circuit board layout

The HRSPD74-154M from API Delevan Inc. shares the same inductance value, tolerance, core material, and shielding configuration as the SPD74-154M. Both components are ferrite-core shielded inductors with surface mount construction. However, the HRSPD74-154M exhibits reduced current rating (510 mA versus 700 mA) and lower DC resistance (750 mOhm maximum versus 880 mOhm maximum), along with minor dimensional variations and different test frequency specifications.

Parameter Comparison

Engineering Selection Recommendations

SPD74-154M (Obsolete): The SPD74-154M is classified as obsolete and no longer in active production. While 912 pieces remain in current inventory, this part number should not be selected for new designs or long-term production commitments. The obsolete status indicates discontinued manufacturing support and potential future supply constraints.

HRSPD74-154M (Active Substitute): The HRSPD74-154M is the active equivalent from API Delevan Inc. and carries an active product status with 1,102 pieces in inventory. This part maintains identical inductance, tolerance, core material, and shielding characteristics as the SPD74-154M.

Critical Substitution Constraint: The HRSPD74-154M is rated for a maximum continuous current of 510 mA, compared to the SPD74-154M's 700 mA rating. This represents a 27% reduction in current capacity. Substitution is only valid for applications where the actual operating current does not exceed 510 mA. Applications requiring the full 700 mA current rating cannot use the HRSPD74-154M as a direct substitute.

Compliance Considerations: Both parts carry RoHS non-compliant status. Neither component is suitable for applications requiring RoHS compliance. Both parts are classified under ECCN EAR99 for export control purposes.

Dimensional Compatibility: The HRSPD74-154M exhibits minor dimensional increases: length and width increase by 0.07 mm (7.30 mm to 7.37 mm), and seated height increases by 0.33 mm (4.70 mm to 5.03 mm). Physical board layout verification is required to confirm fit within existing PCB footprints.

Frequently Asked Questions (FAQ)

Q: Can the HRSPD74-154M directly replace the SPD74-154M in all applications?

A: No. The HRSPD74-154M is suitable only for applications where the operating current does not exceed 510 mA. The SPD74-154M supports 700 mA continuous current. If your circuit requires the full 700 mA rating, the HRSPD74-154M cannot be used as a substitute.

Q: What is the significance of the different inductance test frequencies (1 kHz vs. 10 kHz)?

A: The inductance test frequency indicates the frequency at which the inductance value was measured. The SPD74-154M was characterized at 1 kHz, while the HRSPD74-154M was characterized at 10 kHz. Both parts maintain the same 150 µH nominal inductance value with ±20% tolerance across their respective test frequencies.

Q: Are there dimensional compatibility issues between these parts?

A: Minor dimensional differences exist. The HRSPD74-154M is slightly larger: 0.07 mm greater in length and width, and 0.33 mm greater in seated height. Verify that your PCB footprint and component placement clearances accommodate these dimensional increases before substitution.

Q: Why is the DC resistance lower in the HRSPD74-154M (750 mOhm vs. 880 mOhm)?

A: The DC resistance specification represents the maximum allowable resistance at the rated current. The HRSPD74-154M's lower maximum DCR of 750 mOhm reflects its lower current rating of 510 mA. Lower current ratings typically allow for lower resistance specifications due to reduced thermal constraints.

Q: What does the active product status of HRSPD74-154M mean for supply chain planning?

A: Active product status indicates that the HRSPD74-154M is currently in production and supported by the manufacturer. This ensures ongoing availability, technical support, and consistent manufacturing quality. The obsolete status of SPD74-154M indicates no new production, making the active HRSPD74-154M the preferred choice for new designs.

Q: Are both parts suitable for high-temperature applications?

A: Both parts operate across extended temperature ranges. The SPD74-154M operates from -55°C to 125°C, while the HRSPD74-154M extends to -55°C to 130°C. The HRSPD74-154M provides an additional 5°C of upper temperature margin. Both ranges are suitable for industrial and automotive applications within these limits.

Q: What is the packaging difference between these parts?

A: The SPD74-154M packaging is not specified in the available data. The HRSPD74-154M is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Confirm packaging requirements for your manufacturing process before ordering.