PD105R-124K Equivalent & Substitute Parts

Part Overview

The PD105R-124K is a 120 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 880 mA continuous current with a maximum DC resistance of 420 mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. The part operates across the temperature range of -55°C to 125°C and complies with RoHS3 and REACH requirements.

Substiute Parts

PD105R-124K

API Delevan Inc.In Stock: 1187PD105R-124K Datasheet

Current PartRFQ

SDR1006-121KL

Bourns Inc.In Stock: 61225SDR1006-121KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PD105R-124K is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 120 µH at 1 kHz test frequency
• Inductance tolerance: ±10%
• Core type: Ferrite, unshielded drum core wirewound construction
• Mounting type: Surface Mount
• Current rating: Minimum 880 mA continuous current capability
• DC resistance: Maximum 420 mOhm
• Operating temperature range: Minimum coverage of -55°C to 125°C
• Compliance: RoHS3 and REACH requirements

The SDR1006-121KL from Bourns Inc. meets all primary equivalence criteria and qualifies as a direct substitute for the obsolete PD105R-124K.

Parameter Comparison

Engineering Selection Recommendations

The SDR1006-121KL from Bourns Inc. is the qualified substitute for the obsolete PD105R-124K. Selection is based on the following engineering factors:

Compliance and Regulatory Status: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications subject to environmental restrictions.

Product Lifecycle: The PD105R-124K is classified as obsolete, creating supply chain risk. The SDR1006-121KL maintains active product status with confirmed inventory availability (61,184 pieces), ensuring long-term procurement viability.

Electrical Performance: The SDR1006-121KL meets or exceeds all critical electrical parameters. The saturation current rating of 1.5 A provides additional margin beyond the 880 mA requirement. The DC resistance of 400 mOhm is superior to the 420 mOhm maximum specification of the original part, resulting in lower power dissipation.

Temperature Operating Range: The SDR1006-121KL operates from -40°C to 125°C. Applications requiring the full -55°C lower temperature limit of the original part require thermal performance verification before substitution.

Physical Considerations: Both components are surface mount, unshielded drum core inductors with nonstandard package dimensions. The SDR1006-121KL is supplied in Tape & Reel packaging, which differs from the original part's packaging specification. Verify compatibility with assembly equipment and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can the SDR1006-121KL directly replace the PD105R-124K in all applications?

A: The SDR1006-121KL meets all primary electrical equivalence criteria: 120 µH inductance, ±10% tolerance, 890 mA current rating, 400 mOhm DCR, and identical core construction. However, applications operating below -40°C require thermal performance validation. Packaging format differs (Tape & Reel versus nonstandard), requiring assembly process verification.

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

A: The primary differences are product status (obsolete versus active), operating temperature lower limit (-55°C versus -40°C), saturation current (880 mA versus 1.5 A), and packaging format. The SDR1006-121KL provides superior DC resistance performance (400 mOhm versus 420 mOhm maximum).

Q: Is the SDR1006-121KL suitable for high-temperature applications?

A: Both components share the same upper operating temperature limit of 125°C. The SDR1006-121KL is suitable for applications within the -40°C to 125°C range. Applications requiring operation below -40°C require alternative component selection.

Q: How do the current ratings compare?

A: The PD105R-124K is rated for 880 mA continuous current with 880 mA saturation current. The SDR1006-121KL is rated for 890 mA continuous current with 1.5 A saturation current. The SDR1006-121KL provides additional current margin and saturation headroom.

Q: What is the significance of the lower DC resistance in the SDR1006-121KL?

A: The SDR1006-121KL specifies a maximum DC resistance of 400 mOhm compared to 420 mOhm for the original part. This 20 mOhm reduction results in lower resistive losses and reduced heat generation during operation, improving overall circuit efficiency.

Q: Are there packaging considerations for assembly?

A: The SDR1006-121KL is supplied in Tape & Reel format, which is standard for automated surface mount assembly. Verify that your assembly process and equipment are compatible with this packaging format. The original part's nonstandard packaging may require different handling procedures.

Q: What compliance certifications apply to the SDR1006-121KL?

A: The SDR1006-121KL maintains ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original PD105R-124K. Both components are suitable for applications subject to environmental and hazardous substance restrictions.