PD73R-333K Equivalent & Substitute Parts

Part Overview

The PD73R-333K is a 33 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 900 mA continuous current with a maximum DC resistance of 205 mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the temperature range of -55°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

PD73R-333K

API Delevan Inc.In Stock: 936PD73R-333K Datasheet

Current PartRFQ

SDR0805-330KL

Bourns Inc.In Stock: 4476SDR0805-330KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PD73R-333K is determined by the following critical parameters:

• Inductance Value: Must be 33 µH with ±10% tolerance
• Core Material & Type: Ferrite, unshielded drum core construction
• Current Rating: Minimum 900 mA continuous current capability
• DC Resistance: Maximum 205 mOhm to maintain circuit performance
• Mounting Type: Surface mount configuration
• Temperature Range: Operating capability within -55°C to 125°C
• Compliance: ROHS3 and REACH compliance status

The SDR0805-330KL from Bourns Inc. meets these substitution criteria with enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SDR0805-330KL qualifies as a direct substitute for the PD73R-333K based on matching inductance value, tolerance, core type, and mounting configuration. The substitute part offers improved electrical performance with higher current rating (1.2 A versus 900 mA) and lower DC resistance (140 mOhm versus 205 mOhm maximum).

The SDR0805-330KL maintains ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute is actively manufactured by Bourns Inc., providing procurement continuity and availability advantages over the obsolete PD73R-333K.

The operating temperature range of the substitute extends to -40°C minimum, which is narrower than the main part's -55°C minimum. Applications requiring operation below -40°C must retain the original PD73R-333K or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-330KL directly replace the PD73R-333K in existing designs?

A: The SDR0805-330KL meets the core electrical and mechanical requirements for substitution: matching 33 µH inductance, ±10% tolerance, ferrite unshielded drum core construction, and surface mount configuration. The substitute provides superior current rating and lower DC resistance. Verify that your application does not require operation below -40°C, as the substitute's minimum operating temperature is -40°C versus the original part's -55°C.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (API Delevan versus Bourns), product status (obsolete versus active), current rating (900 mA versus 1.2 A), DC resistance (205 mOhm versus 140 mOhm), and minimum operating temperature (-55°C versus -40°C). The substitute offers improved electrical performance and active manufacturing status.

Q: Are there any package or footprint considerations?

A: Both parts are surface mount with nonstandard packages. The SDR0805-330KL is available in Tape & Reel (TR) packaging. Physical dimensions differ slightly: PD73R-333K measures 0.303" L x 0.272" W x 0.138" H, while SDR0805-330KL measures 0.307" L x 0.307" W x 0.209" H. Verify PCB layout compatibility before implementation.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the PD73R-333K and SDR0805-330KL are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level). Regulatory requirements are equivalent.

Q: Why is the PD73R-333K obsolete?

A: The PD73R-333K is classified as obsolete by the manufacturer. The SDR0805-330KL from Bourns Inc. represents an active alternative that meets the electrical and mechanical specifications required for this application category.