PD73R-154K Equivalent & Substitute Parts

Part Overview

The PD73R-154K is a 150 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 400 mA continuous current with a maximum DC resistance of 750 mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -55°C to 125°C and complies with RoHS3 and REACH requirements.

Substiute Parts

PD73R-154K

API Delevan Inc.In Stock: 1131PD73R-154K Datasheet

Current PartRFQ

SDR0805-151KL

Bourns Inc.In Stock: 7904SDR0805-151KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete PD73R-154K is based on the following critical parameters:

Primary Matching Criteria:

• Inductance value: 150 µH (exact match required)
• Inductance tolerance: ±10% (matching tolerance band)
• Core type: Ferrite drum core, unshielded (same electromagnetic characteristics)
• Mounting: Surface mount (same assembly compatibility)
• Compliance: RoHS3 and REACH status (regulatory alignment)

Secondary Compatibility Criteria:

• Current rating: Substitute must equal or exceed 400 mA minimum
• DC resistance: Substitute must not exceed 750 mOhm maximum
• Operating temperature: Substitute must cover or exceed -55°C to 125°C range
• Package classification: Nonstandard surface mount form factor

The SDR0805-151KL from Bourns Inc. satisfies all primary and secondary criteria, with enhanced current handling (580 mA) and improved DC resistance (680 mOhm), while maintaining identical inductance and tolerance specifications.

Parameter Comparison

Engineering Selection Recommendations

The SDR0805-151KL is the qualified substitute for the obsolete PD73R-154K based on the following engineering factors:

Compliance and Availability: The SDR0805-151KL maintains full RoHS3 and REACH compliance, ensuring regulatory alignment with current manufacturing standards. As an active product from Bourns Inc., it provides long-term procurement stability and supply chain continuity, eliminating the obsolescence risk associated with the PD73R-154K.

Electrical Performance: Both components deliver identical inductance (150 µH) and tolerance (±10%) at the 1 kHz test frequency. The SDR0805-151KL provides superior electrical characteristics with 580 mA current rating and 680 mOhm maximum DC resistance, both exceeding the PD73R-154K specifications. This performance margin accommodates circuit design flexibility without requiring redesign.

Temperature Consideration: The SDR0805-151KL operates from -40°C to 125°C, compared to the PD73R-154K range of -55°C to 125°C. Applications requiring operation below -40°C require evaluation of alternative substitutes or retention of legacy stock.

Physical and Mechanical Compatibility: Both components are surface mount, ferrite drum core inductors with nonstandard package dimensions. Physical footprint differences (PD73R-154K: 7.70mm × 6.91mm × 3.50mm height; SDR0805-151KL: 7.80mm × 7.80mm × 5.30mm height) require PCB layout verification prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-151KL directly replace the PD73R-154K without circuit modification?

A: The SDR0805-151KL is electrically compatible for applications operating at or above -40°C. The identical inductance value (150 µH) and tolerance (±10%) ensure equivalent circuit performance. Physical dimensions differ slightly; PCB layout verification is required. Applications requiring operation below -40°C require alternative evaluation.

Q: What is the significance of the higher current rating in the SDR0805-151KL?

A: The SDR0805-151KL 580 mA rating versus the PD73R-154K 400 mA rating indicates improved thermal performance and saturation characteristics. This provides design margin for current transients and thermal stress, but does not require circuit redesign if the original 400 mA specification is maintained.

Q: Are there dimensional constraints for PCB layout?

A: Yes. The SDR0805-151KL is 0.209" (5.30mm) in seated height compared to the PD73R-154K at 0.138" (3.50mm). The footprint is also slightly larger (7.80mm × 7.80mm versus 7.70mm × 6.91mm). Verify clearance with adjacent components and trace routing before implementation.

Q: Does the lower DC resistance of the SDR0805-151KL affect circuit operation?

A: The SDR0805-151KL DC resistance of 680 mOhm is lower than the PD73R-154K maximum of 750 mOhm. This reduction improves efficiency and reduces heat dissipation, providing a performance benefit with no negative circuit impact.

Q: What compliance certifications apply to both parts?

A: Both the PD73R-154K and SDR0805-151KL are RoHS3 compliant and REACH unaffected. Both carry EAR99 export classification and HTSUS code 8504.50.4000, ensuring regulatory alignment for procurement and distribution.