PD75R-393K Equivalent & Substitute Parts

Part Overview

The PD75R-393K is a 39 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.2 A with a maximum DC resistance of 180 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part is surface mount, RoHS3 compliant, and operates across the temperature range of -55°C to 125°C.

Substiute Parts

PD75R-393K

API Delevan Inc.In Stock: 1016PD75R-393K Datasheet

Current PartRFQ

CDH74NP-390KC

Sumida America Components Inc.In Stock: 850CDH74NP-390KC Datasheet

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SDR0805-390KL

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

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PD75R-393K are qualified based on the following electrical and mechanical parameters:

• Inductance value: 39 µH ±10%
• Core material and type: Ferrite, unshielded drum core wirewound
• Mounting type: Surface Mount
• Inductance tolerance: ±10%
• Test frequency: 1 kHz
• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

The substitute parts CDH74NP-390KC and SDR0805-390KL meet these core substitution criteria. Variations in current rating, DC resistance, and operating temperature range are documented to enable selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both CDH74NP-390KC and SDR0805-390KL are active product status alternatives to the obsolete PD75R-393K. Selection between these substitutes depends on application-specific requirements:

CDH74NP-390KC offers the highest current rating at 1.3 A, suitable for applications requiring maximum current capacity. However, its operating temperature range (-40°C to 100°C) is narrower than the original part, limiting use in extended low-temperature environments.

SDR0805-390KL provides the lowest DC resistance at 160 mOhm Max and maintains the full operating temperature range (-40°C to 125°C) of the original specification. This part is recommended for applications sensitive to resistive losses or requiring extended temperature operation.

Both substitute parts are RoHS3 compliant with MSL 1 rating, matching the compliance profile of the main part.

Frequently Asked Questions (FAQ)

Q: Can CDH74NP-390KC be used in applications requiring operation below -40°C?

A: No. CDH74NP-390KC operates from -40°C to 100°C. Applications requiring operation at -55°C must use SDR0805-390KL, which supports -40°C to 125°C.

Q: What is the primary difference in DC resistance between the substitutes?

A: SDR0805-390KL has the lowest DC resistance at 160 mOhm Max, compared to 180 mOhm Max for the original PD75R-393K and 210 mOhm Max for CDH74NP-390KC. Lower DC resistance reduces power dissipation in current-limited applications.

Q: Are all three parts physically interchangeable on the PCB?

A: Physical dimensions vary slightly. PD75R-393K measures 7.70mm x 6.91mm x 5.00mm (max height), while CDH74NP-390KC measures 8.00mm x 7.30mm x 5.20mm and SDR0805-390KL measures 7.80mm x 7.80mm x 5.30mm. PCB layout must accommodate these dimensional differences.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. Both CDH74NP-390KC and SDR0805-390KL are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original PD75R-393K.

Q: Which substitute is recommended for new designs?

A: Selection depends on application requirements. For maximum current capacity, use CDH74NP-390KC. For lowest resistive losses and full temperature range support, use SDR0805-390KL. Both are active products with established supply chains.