PD105R-273K Equivalent & Substitute Parts

Part Overview

The PD105R-273K is a 27 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.8 A with a maximum DC resistance of 115 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-273K

API Delevan Inc.In Stock: 957PD105R-273K Datasheet

Current PartRFQ

SDR1006-270KL

Bourns Inc.In Stock: 19047SDR1006-270KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PD105R-273K is determined by the following critical parameters:

• Inductance Value: 27 µH (±10% tolerance)
• Current Rating: Minimum 1.8 A
• DC Resistance: Maximum 115 mOhm
• Core Material: Ferrite, unshielded drum core
• Mounting Type: Surface mount
• Operating Temperature: Support for -55°C to 125°C range
• Compliance: ROHS3 and REACH compliance status

The SDR1006-270KL from Bourns Inc. meets these substitution criteria with equivalent inductance, comparable current handling, and superior DC resistance performance.

Parameter Comparison

Engineering Selection Recommendations

The SDR1006-270KL is an active product from Bourns Inc. and serves as a direct functional equivalent to the obsolete PD105R-273K. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system support.

The substitute part delivers improved DC resistance performance (110 mOhm vs. 115 mOhm maximum) and maintains the same inductance value and tolerance specification. The current rating of the SDR1006-270KL is 1.75 A, which is marginally lower than the 1.8 A rating of the main part; however, this difference is within acceptable engineering margins for most applications given the superior resistance characteristics.

The operating temperature range of the substitute extends to -40°C minimum, compared to -55°C for the original part. Applications requiring operation below -40°C must account for this limitation.

Frequently Asked Questions (FAQ)

Q: Can the SDR1006-270KL directly replace the PD105R-273K in existing designs?

A: The SDR1006-270KL is functionally equivalent for applications operating above -40°C. The inductance value, tolerance, core type, and mounting configuration are identical. The current rating difference (1.75 A vs. 1.8 A) and DC resistance improvement (110 mOhm vs. 115 mOhm) are within acceptable substitution parameters for most circuit designs.

Q: What is the significance of the current rating difference?

A: The PD105R-273K is rated for 1.8 A while the SDR1006-270KL is rated for 1.75 A. This 0.05 A difference represents approximately 2.8% variance. For applications operating near the maximum current specification of the original part, thermal and saturation characteristics should be evaluated.

Q: Are there packaging considerations for this substitution?

A: The PD105R-273K uses nonstandard packaging, while the SDR1006-270KL is supplied in Tape & Reel (TR) format. Procurement and assembly processes may require adjustment to accommodate the different packaging configuration.

Q: Does the substitute part meet the same compliance requirements?

A: Yes. Both the PD105R-273K and SDR1006-270KL are ROHS3 compliant and REACH unaffected, ensuring equivalent regulatory status for applications subject to these standards.

Q: What is the impact of the operating temperature range difference?

A: The substitute part operates from -40°C to 125°C, while the original operates from -55°C to 125°C. Applications requiring operation below -40°C cannot use the SDR1006-270KL as a substitute without additional thermal analysis or design modification.