PD104R-124K Equivalent & Substitute Parts

Part Overview

The PD104R-124K is a 120 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications. This component operates across an extended temperature range of -55°C to 125°C with a current rating of 670 mA and maximum DC resistance of 450 mOhm. The part is currently active in production and ROHS3 compliant, making it suitable for modern electronic assemblies requiring fixed inductance in compact form factors.

Equivalent and substitute parts are identified when alternative components meet or exceed the electrical and mechanical specifications of the original part while maintaining compatibility with the intended application circuit and assembly process.

Substiute Parts

PD104R-124K

API Delevan Inc.In Stock: 1161PD104R-124K Datasheet

Current PartRFQ

SDR1006-121KL

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PD104R-124K is determined by strict equivalence across the following critical parameters:

Inductance Value: Must be 120 µH with ±10% tolerance to maintain circuit performance and frequency response characteristics.

Current Rating: Substitute parts must support a minimum current rating equal to or greater than 670 mA to ensure safe operation without thermal degradation.

DC Resistance: Maximum DC resistance must not exceed 450 mOhm to maintain power efficiency and thermal performance within design specifications.

Core Material and Shielding: Ferrite core construction with unshielded configuration must be preserved to match electromagnetic properties and EMI characteristics.

Operating Temperature Range: The substitute must support the full -55°C to 125°C operating window or a range that encompasses it.

Mounting and Package: Surface mount configuration with nonstandard package dimensions must be compatible with the PCB layout and assembly process.

Compliance: ROHS3 compliance is required for regulatory and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The SDR1006-121KL from Bourns Inc. qualifies as a functional equivalent to the PD104R-124K based on matching inductance value, tolerance, core material, shielding configuration, and mounting type. The substitute part exceeds the original specification in current rating (890 mA versus 670 mA) and provides lower DC resistance (400 mOhm versus 450 mOhm maximum), resulting in improved thermal performance.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory continuity and assembly process compatibility. The SDR1006-121KL operates across -40°C to 125°C, which covers the upper operating range of the original part. Applications requiring the full -55°C lower temperature limit must confirm that the reduced lower temperature specification of the substitute does not conflict with system requirements.

Physical dimensions differ slightly between the two parts. The SDR1006-121KL measures 0.386" L x 0.386" W x 0.228" H (seated), compared to the PD104R-124K at 0.386" L x 0.346" W x 0.157" H (seated). PCB layout verification is necessary to confirm that the increased height and width of the substitute part do not create mechanical interference or assembly constraints.

Frequently Asked Questions (FAQ)

Q: Can the SDR1006-121KL directly replace the PD104R-124K in all applications?

A: The SDR1006-121KL meets or exceeds the electrical specifications of the PD104R-124K. However, physical dimensions must be verified against PCB layout constraints. The substitute part is taller and wider, requiring confirmation that no mechanical interference exists. Applications operating below -40°C must confirm compatibility with the reduced lower temperature limit.

Q: What is the significance of the current rating difference between these parts?

A: The SDR1006-121KL supports 890 mA compared to the PD104R-124K at 670 mA. This higher rating provides additional thermal margin and allows operation at higher current levels without saturation. For circuits designed to operate at or below 670 mA, both parts are functionally equivalent in this parameter.

Q: How does the lower DC resistance of the substitute part affect circuit performance?

A: The SDR1006-121KL exhibits 400 mOhm maximum DC resistance versus 450 mOhm for the original part. Lower DC resistance reduces resistive losses, resulting in lower heat generation and improved power efficiency. This is a beneficial characteristic that does not compromise compatibility.

Q: Are there any compliance or supply chain considerations?

A: Both parts are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1). No additional handling or storage requirements are introduced by substitution. Both parts are currently active in production with established supply availability.

Q: What should be verified before implementing the SDR1006-121KL as a substitute?

A: Confirm that PCB layout accommodates the physical dimensions of the SDR1006-121KL (0.386" L x 0.386" W x 0.228" H seated). Verify that the operating temperature range of -40°C to 125°C satisfies system requirements. Perform electrical testing to confirm circuit performance remains within design specifications, particularly in frequency response and impedance characteristics at the application's operating frequency.