SPD74-274M Equivalent & Substitute Parts

Part Overview

The SPD74-274M is a 270 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 530 mA continuous current with a maximum DC resistance of 1.64 Ohm. This component operates across the temperature range of -55°C to 125°C and is designed for surface mount applications in nonstandard packaging.

The SPD74-274M 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.

Substiute Parts

SPD74-274M

API Delevan Inc.In Stock: 853SPD74-274M Datasheet

Current PartRFQ

HRSPD74-274M

API Delevan Inc.In Stock: 806HRSPD74-274M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPD74-274M is evaluated based on the following critical parameters:

Electrical Compatibility Criteria:

• Inductance value must match at 270 µH with ±20% tolerance
• Core material must be ferrite to maintain electromagnetic characteristics
• Shielding configuration must be shielded to preserve EMI performance
• Operating temperature range must encompass or exceed -55°C to 125°C

Mechanical Compatibility Criteria:

• Mounting type must be surface mount
• Physical dimensions must be compatible with existing PCB layouts
• Package type must accommodate the nonstandard form factor

Performance Criteria:

• Current rating and DC resistance values determine thermal and electrical performance margins

The HRSPD74-274M qualifies as a substitute based on matching inductance (270 µH), identical tolerance (±20%), ferrite core material, shielded configuration, and surface mount design. However, the HRSPD74-274M exhibits reduced current rating (320 mA versus 530 mA) and lower DC resistance (1.2 Ohm versus 1.64 Ohm), which affects thermal performance and current handling capacity.

Parameter Comparison

Engineering Selection Recommendations

SPD74-274M (Obsolete): The SPD74-274M is classified as obsolete and carries RoHS non-compliant status. Continued sourcing of this component is subject to inventory depletion and supply chain discontinuation. Current inventory shows 836 pieces available.

HRSPD74-274M (Active Substitute): The HRSPD74-274M is an active product from the same manufacturer with extended availability. It maintains electrical equivalence in inductance and tolerance specifications. The HRSPD74-274M offers an extended operating temperature range (-55°C to 130°C versus -55°C to 125°C) and is supplied in standard Tape & Reel packaging, improving procurement efficiency.

Selection Basis:

• Both components are manufactured by API Delevan Inc., ensuring design consistency
• Inductance and tolerance specifications are identical
• Core material, shielding, and mounting type are equivalent
• Physical dimensions are comparable with minimal variation (7.37mm versus 7.30mm)
• HRSPD74-274M provides active product status and improved supply chain continuity

Current Rating Consideration: The HRSPD74-274M current rating of 320 mA is lower than the SPD74-274M rating of 530 mA. Applications operating at or near the 530 mA specification require verification that circuit current demands do not exceed 320 mA to prevent thermal stress and component degradation.

Frequently Asked Questions (FAQ)

Q: Can the HRSPD74-274M directly replace the SPD74-274M in all applications?

A: The HRSPD74-274M is electrically equivalent in inductance and tolerance. However, the reduced current rating (320 mA versus 530 mA) requires circuit current verification. If circuit current remains below 320 mA, direct substitution is feasible. Applications requiring the full 530 mA rating require alternative sourcing.

Q: What is the impact of the 1.2 Ohm DC resistance in the HRSPD74-274M compared to 1.64 Ohm in the SPD74-274M?

A: The lower DC resistance (1.2 Ohm) in the HRSPD74-274M results in reduced resistive losses and lower heat generation at equivalent current levels. This represents an improvement in thermal performance characteristics.

Q: Are the physical dimensions compatible between the two parts?

A: The HRSPD74-274M dimensions (7.37mm × 7.37mm × 5.03mm) are slightly larger than the SPD74-274M (7.30mm × 7.30mm × 4.70mm). PCB layout verification is required to confirm clearance and mounting compatibility, particularly in space-constrained designs.

Q: What is the difference in packaging between these two parts?

A: The SPD74-274M uses nonstandard packaging, while the HRSPD74-274M is supplied in Tape & Reel (TR) format. Tape & Reel packaging improves handling efficiency and reduces manual processing during assembly operations.

Q: Does the extended temperature range of the HRSPD74-274M provide additional design margin?

A: The HRSPD74-274M operates to 130°C versus 125°C for the SPD74-274M. This 5°C extension provides marginal additional thermal headroom in high-temperature environments but does not constitute a significant design advantage for most applications.

Q: Are there RoHS compliance implications for substitution?

A: Both the SPD74-274M and HRSPD74-274M carry RoHS non-compliant status. Substitution does not alter compliance classification. Applications requiring RoHS-compliant components require alternative component sourcing outside this substitution group.