PD73R-332M Equivalent & Substitute Parts

Part Overview

The PD73R-332M is a 3.3 µH unshielded drum core, wirewound inductor manufactured by API Delevan Inc., rated for 2.5 A with a maximum DC resistance of 50 mOhm. This component operates across the temperature range of -55°C to 125°C and is classified as obsolete. Locating equivalent substitute parts is necessary due to the discontinued status of the original manufacturer part, ensuring design continuity and procurement availability.

Substiute Parts

PD73R-332M

API Delevan Inc.In Stock: 1159PD73R-332M Datasheet

Current PartRFQ

SDR0805-3R3ML

Bourns Inc.In Stock: 12384SDR0805-3R3ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PD73R-332M must maintain electrical equivalence based on the following critical parameters:

Primary Electrical Criteria:

• Inductance value: 3.3 µH (matching tolerance ±20%)
• Current rating: minimum 2.5 A or higher
• Core type: Drum core, wirewound construction
• Shielding: Unshielded

Mechanical Criteria:

• Mounting type: Surface mount
• Package configuration: Nonstandard form factor compatible with original footprint

Compliance Criteria:

• RoHS3 compliance required
• Operating temperature range: must support -55°C ~ 125°C or the application's subset thereof

The SDR0805-3R3ML from Bourns Inc. qualifies as a substitute based on identical inductance value, higher current rating (4.5 A vs. 2.5 A), superior electrical performance, and maintained compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The SDR0805-3R3ML is the qualified substitute for the PD73R-332M based on the following factors:

Product Status: The SDR0805-3R3ML holds active product status with established supply chains and ongoing manufacturer support, contrasting with the obsolete status of the original part.

Compliance Certifications: Both parts maintain ROHS3 compliance and identical moisture sensitivity classifications (MSL 1), ensuring regulatory alignment for applications subject to environmental restrictions.

Electrical Enhancement: The substitute provides superior electrical performance with higher current handling capacity (4.5 A vs. 2.5 A) and lower DC resistance (20 mOhm vs. 50 mOhm), delivering improved thermal characteristics and design margin without functional incompatibility.

Temperature Range Consideration: The substitute operates at -40°C ~ 125°C; applications requiring the full -55°C lower bound of the original part must assess their actual minimum operating temperature requirement.

Frequently Asked Questions (FAQ)

Q: Are the PD73R-332M and SDR0805-3R3ML electrically interchangeable? A: Yes, both components provide 3.3 µH inductance with ±20% tolerance and identical core construction. The substitute supports higher current levels, making it suitable for circuits designed for the original part.

Q: What is the difference in physical dimensions between these parts? A: The PD73R-332M measures 0.303" L x 0.272" W with 0.138" height. The SDR0805-3R3ML measures 0.307" L x 0.307" W with 0.209" height. Verify that your PCB layout accommodates the slightly larger footprint of the substitute.

Q: Does the lower DC resistance of the SDR0805-3R3ML affect circuit operation? A: Lower DC resistance (20 mOhm vs. 50 mOhm) reduces resistive losses and heat generation. This presents no compatibility issue and generally improves circuit efficiency.

Q: Can I use the SDR0805-3R3ML in place of the PD73R-332M if my application operates below -40°C? A: If your design requires continuous operation below -40°C, verification against the SDR0805-3R3ML's temperature specifications is required. If operation above -40°C is acceptable, no restriction applies.

Q: Are both parts compliant with RoHS regulations? A: Yes, both the PD73R-332M and SDR0805-3R3ML are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for most industrial and commercial applications.

Q: What is the packaging difference between these parts? A: The PD73R-332M is available in standard inventory form. The SDR0805-3R3ML is supplied on tape and reel (TR), the standard distribution format for volume procurement and automated assembly processes.