PD105R-333K Equivalent & Substitute Parts

Part Overview

The PD105R-333K is a 33 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.65 A with a maximum DC resistance of 125 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

PD105R-333K

API Delevan Inc.In Stock: 1158PD105R-333K Datasheet

Current PartRFQ

SDR1006-330KL

Bourns Inc.In Stock: 3308SDR1006-330KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PD105R-333K is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 33 µH (exact match required)
• Inductance tolerance: ±10% (matching tolerance band)
• Core type: Ferrite drum core, unshielded
• Mounting type: Surface mount
• DC resistance: Maximum 125 mOhm or lower

Secondary Compatibility Factors:

• Current rating: Minimum 1.65 A (equal or higher acceptable)
• Operating temperature range: Must support -55°C to 125°C or equivalent
• Compliance: ROHS3 and REACH status alignment
• Package dimensions: Physical fit within application constraints

The SDR1006-330KL from Bourns Inc. meets these substitution criteria with equivalent inductance, matching tolerance, identical core material and shielding configuration, and superior current saturation rating (2.9 A vs. 1.65 A).

Parameter Comparison

Engineering Selection Recommendations

The SDR1006-330KL qualifies as a functional substitute for the obsolete PD105R-333K based on matching inductance, tolerance, core material, and shielding configuration. Both components maintain ROHS3 compliance and REACH unaffected status, supporting regulatory continuity.

Selection Considerations:

The substitute component exhibits a lower continuous current rating (1.5 A vs. 1.65 A) but provides superior saturation current (2.9 A). Applications operating at or near the 1.65 A continuous rating require thermal and margin analysis to confirm the 1.5 A rating remains acceptable under worst-case conditions.

The operating temperature range of the substitute is limited to -40°C minimum, compared to -55°C for the original part. Applications requiring operation below -40°C cannot use this substitute without additional thermal analysis.

Physical dimensions differ slightly in width (9.80mm vs. 9.80mm length match, but 9.80mm vs. 8.79mm width) and height (5.80mm vs. 5.40mm). PCB layout verification is required to confirm mechanical fit within the application.

The substitute is actively manufactured and available in higher inventory quantities (3214 Pcs vs. 1049 Pcs), supporting long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the SDR1006-330KL directly replace the PD105R-333K without circuit modification?

A: Electrical substitution is possible for applications where continuous current does not exceed 1.5 A and operating temperature remains above -40°C. Physical fit must be verified due to dimensional differences. No circuit modification is required if these conditions are met.

Q: What is the impact of the lower current rating on the substitute part?

A: The SDR1006-330KL is rated for 1.5 A continuous current versus 1.65 A for the original part. This represents a 9% reduction in continuous current capacity. Applications operating near the original 1.65 A specification require thermal analysis to confirm the substitute remains within safe operating margins. The substitute's saturation current of 2.9 A exceeds the original specification, providing additional transient current headroom.

Q: Are there temperature range limitations with the substitute?

A: Yes. The SDR1006-330KL operates from -40°C to 125°C, while the original PD105R-333K operates from -55°C to 125°C. Applications requiring operation below -40°C cannot use this substitute without additional thermal or derating analysis.

Q: Do the physical dimensions of the substitute affect PCB layout?

A: The substitute is slightly larger in width (9.80mm vs. 8.79mm) and height (5.80mm vs. 5.40mm). Both dimensions remain within typical surface mount tolerances, but PCB layout verification is required to confirm clearance with adjacent components and mechanical constraints.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the PD105R-333K and SDR1006-330KL are ROHS3 compliant and REACH unaffected, supporting equivalent regulatory status for applications subject to these requirements.

Q: What is the DC resistance difference between the two parts?

A: The SDR1006-330KL exhibits a maximum DC resistance of 120 mOhm, compared to 125 mOhm for the original part. This 4% improvement in DC resistance reduces resistive losses and heat generation, providing a minor performance advantage.

Q: Is the substitute available in the same packaging format?

A: The substitute is supplied in Tape & Reel (TR) packaging, while the original part packaging format is not specified in the provided data. Verify packaging compatibility with your procurement and assembly processes.