PD105R-123K Equivalent & Substitute Parts

Part Overview

The PD105R-123K is a 12 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 2.45 A continuous current with 70 mOhm maximum DC resistance. This component operates across a temperature range of -55°C to 125°C and is compliant with RoHS3 and REACH regulations. The product status is obsolete, necessitating the identification of functionally equivalent alternatives for new designs and ongoing supply chain management.

Substiute Parts

PD105R-123K

API Delevan Inc.In Stock: 772PD105R-123K Datasheet

Current PartRFQ

SDR1006-120ML

Bourns Inc.In Stock: 2813SDR1006-120ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PD105R-123K is determined by the following mandatory electrical and mechanical parameters: inductance value (12 µH), current rating (minimum 2.45 A), DC resistance (maximum 70 mOhm), core material (ferrite), shielding configuration (unshielded), and mounting type (surface mount). The substitute part SDR1006-120ML from Bourns Inc. matches these core requirements and maintains compatibility with the specified operating temperature and environmental compliance standards.

The SDR1006-120ML meets all critical substitution criteria despite minor variations in tolerance (±20% vs ±10%), saturation current (4.5 A vs 2.45 A), and physical dimensions, as these parameters remain within acceptable ranges for equivalent circuit performance.

Parameter Comparison

*The SDR1006-120ML operates from -40°C to 125°C, which covers the upper portion of the original operating range. Applications requiring full -55°C performance must confirm compatibility at minimum temperature.

Engineering Selection Recommendations

The SDR1006-120ML is the primary equivalent for the obsolete PD105R-123K. Both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, ensuring equivalent environmental qualification for solder reflow and handling processes.

The SDR1006-120ML is currently active in production with documented inventory availability (2722 Pcs), providing supply continuity for new designs. The substitute component delivers identical electrical core performance in terms of inductance, current rating, and DC resistance while offering enhanced saturation current margin (4.5 A versus 2.45 A).

Designers should note the operating temperature floor difference: the original PD105R-123K specifies -55°C to 125°C while the SDR1006-120ML operates from -40°C to 125°C. This affects suitability for applications with extended low-temperature operating requirements.

Frequently Asked Questions (FAQ)

Q: What are the critical electrical parameters that must match between the original and substitute parts?

A: Inductance value (12 µH), continuous current rating (2.45 A minimum), and DC resistance (70 mOhm maximum) are the primary electrical criteria. The substitute SDR1006-120ML maintains identical specifications for all three parameters.

Q: How does the higher saturation current rating of the SDR1006-120ML affect substitution suitability?

A: The SDR1006-120ML saturation current of 4.5 A exceeds the original 2.45 A specification, providing additional headroom against saturation-induced inductance collapse. This enhances circuit reliability under transient current conditions while maintaining the specified continuous current rating.

Q: Are there mechanical compatibility concerns with the SDR1006-120ML substitute?

A: Both components are nonstandard package drums with surface mount configuration. The SDR1006-120ML is slightly larger in width (9.80mm x 9.80mm versus 9.80mm x 8.79mm) and height (5.80mm versus 5.40mm). PCB layout verification is required to confirm physical clearance.

Q: Does the ±20% inductance tolerance of the SDR1006-120ML impact circuit performance?

A: The wider tolerance band (±20% versus ±10%) affects design margin for inductance-critical circuits such as filtering, resonant frequency tuning, or impedance matching networks. Circuit simulations should confirm acceptable performance across the full tolerance envelope of the substitute part.

Q: What are the moisture and environmental handling differences?

A: Both components carry ROHS3 compliance and MSL 1 (Unlimited) ratings, indicating identical handling requirements. No additional moisture control or packaging precautions are required when transitioning from PD105R-123K to SDR1006-120ML.

Q: Is the reduced operating temperature range of the SDR1006-120ML a constraint?

A: The SDR1006-120ML minimum operating temperature of -40°C versus -55°C on the original limits use in applications requiring extended low-temperature performance (space, arctic, or specialized military environments). Standard commercial and industrial applications operating above -40°C encounter no limitation.