PD73R-393K Equivalent & Substitute Parts

Part Overview

The PD73R-393K is a 39 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 800 mA with a maximum DC resistance of 230mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across the temperature range of -55°C to 125°C and complies with ROHS3 and REACH standards.

Substiute Parts

PD73R-393K

API Delevan Inc.In Stock: 1138PD73R-393K Datasheet

Current PartRFQ

SDR0805-390KL

Bourns Inc.In Stock: 5444SDR0805-390KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PD73R-393K is determined by the following critical parameters:

• Inductance Value: Must be 39 µH with ±10% tolerance
• Core Material & Type: Ferrite, unshielded drum core construction
• Current Rating: Minimum 800 mA saturation capability
• DC Resistance: Maximum 230mOhm to maintain circuit performance
• Mounting Type: Surface mount configuration
• Temperature Range: Operating capability within -55°C to 125°C
• Compliance: ROHS3 and REACH compliance required

The SDR0805-390KL from Bourns Inc. meets these substitution criteria with equivalent inductance, core type, and mounting configuration, while providing enhanced current handling and lower DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SDR0805-390KL is a direct functional substitute for the PD73R-393K. Both components share identical inductance values, core materials, and mounting configurations. The substitute part offers improved electrical performance with lower DC resistance (160mOhm vs. 230mOhm) and higher current saturation capability (1.7A vs. 800mA), providing design margin for circuit applications.

The SDR0805-390KL maintains full compliance with ROHS3 and REACH standards. The primary design consideration is the operating temperature minimum: the substitute operates from -40°C versus the original part's -55°C lower limit. Applications requiring operation below -40°C require thermal analysis or alternative component selection.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-390KL directly replace the PD73R-393K in existing designs?

A: Yes, the SDR0805-390KL is functionally equivalent for applications operating within the -40°C to 125°C temperature range. Both components provide 39 µH inductance with ±10% tolerance, ferrite drum core construction, and surface mount packaging. The substitute offers superior DC resistance and current handling characteristics.

Q: What is the impact of the lower DC resistance in the substitute part?

A: The SDR0805-390KL exhibits 160mOhm maximum DC resistance compared to 230mOhm in the original part. This reduction decreases resistive losses in the inductor, resulting in improved circuit efficiency and reduced heat generation. This is a beneficial characteristic for direct substitution.

Q: Are there packaging or footprint differences between these parts?

A: Both components are surface mount inductors with nonstandard package dimensions. The PD73R-393K measures 0.303" L x 0.272" W x 0.138" H (7.70mm x 6.91mm x 4.60mm). The SDR0805-390KL measures 0.307" L x 0.307" W x 0.209" H (7.80mm x 7.80mm x 5.30mm). PCB layout verification is required to confirm mechanical compatibility.

Q: What compliance certifications apply to the substitute part?

A: The SDR0805-390KL is ROHS3 compliant and REACH unaffected, matching the compliance profile of the original PD73R-393K. Both components carry EAR99 ECCN classification and HTSUS code 8504.50.4000.

Q: Is the substitute part currently available?

A: The SDR0805-390KL is classified as active product status with 5400 pieces in stock, ensuring supply continuity. The original PD73R-393K is obsolete with limited remaining inventory of 1116 pieces.