CDH3D13SNP-2R5MC Equivalent & Substitute Parts

Part Overview

The CDH3D13SNP-2R5MC is a 2.5 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. with a current rating of 1.85 A and maximum DC resistance of 122mOhm. This component is classified as obsolete product status. Identification of equivalent substitute parts is necessary due to obsolescence and potential supply chain discontinuation. Active alternative components with comparable electrical characteristics and surface mount packaging are available to maintain design continuity.

Substiute Parts

CDH3D13SNP-2R5MC

Sumida America Components Inc.In Stock: 1005CDH3D13SNP-2R5MC Datasheet

Current PartRFQ

1235AS-H-2R4M=P3

Murata ElectronicsIn Stock: 31241235AS-H-2R4M=P3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH3D13SNP-2R5MC is evaluated based on the following critical electrical and mechanical parameters:

Inductance Value: The substitute part must operate within the ±20% tolerance band of 2.5 µH. The Murata 1235AS-H-2R4M=P3 provides 2.4 µH, which falls within acceptable tolerance limits for equivalent circuit performance at 100 kHz test frequency.

Current Rating: The substitute must support the application current without saturation. The CDH3D13SNP-2R5MC has a 1.85 A rating with 1.4 A saturation current. The Murata substitute provides 2.3 A rating with 2.6 A saturation current, exceeding the original specification and providing design margin.

DC Resistance: The substitute DCR of 65mOhm is lower than the original 122mOhm maximum, resulting in reduced power dissipation and improved efficiency in the application circuit.

Mounting Type: Both components are surface mount inductors, ensuring mechanical and assembly compatibility.

Compliance: Both parts are ROHS3 compliant with MSL 1 rating, meeting environmental and reliability standards.

Shielding Difference: The substitute is shielded (ferrite drum core) versus the original unshielded design. This represents a functional enhancement for EMI containment in sensitive applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The CDH3D13SNP-2R5MC is obsolete, making the active Murata 1235AS-H-2R4M=P3 the appropriate selection for new designs and ongoing production requirements.

Electrical Compatibility: The 2.4 µH inductance of the substitute falls within the ±20% tolerance specification of the original 2.5 µH component. At the 100 kHz test frequency, this inductance variance is acceptable for equivalent circuit operation. The substitute's superior current rating (2.3 A versus 1.85 A) and saturation current (2.6 A versus 1.4 A) provide additional design margin without circuit modification.

Compliance and Certification: Both components meet ROHS3 compliance and carry MSL 1 moisture sensitivity ratings, ensuring equivalent environmental and reliability performance in manufacturing and field deployment.

Physical Footprint: The substitute is slightly larger (4.70mm x 4.50mm versus 4.00mm x 3.80mm) with increased height (1.80mm versus 1.40mm). PCB layout verification is required to confirm mechanical fit within the original design envelope.

Shielding Enhancement: The ferrite drum core shielding of the substitute provides improved EMI containment compared to the unshielded original design, offering functional enhancement for noise-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the Murata 1235AS-H-2R4M=P3 directly replace the CDH3D13SNP-2R5MC in existing designs?

A: Electrical substitution is valid based on inductance tolerance, current rating, and compliance parameters. Physical verification of PCB footprint is required due to dimensional differences (4.70mm x 4.50mm substitute versus 4.00mm x 3.80mm original).

Q: What is the significance of the 0.1 µH inductance difference between the two parts?

A: The 2.4 µH substitute versus 2.5 µH original represents a 4% variance, well within the ±20% tolerance specification for both components. At 100 kHz test frequency, this difference produces negligible circuit performance variation in typical inductor applications.

Q: Does the shielded design of the substitute affect circuit performance?

A: The ferrite drum core shielding reduces radiated EMI and provides improved magnetic field containment. For applications sensitive to electromagnetic interference, this represents a functional improvement. For applications where shielding is not required, performance remains equivalent within specified tolerances.

Q: Are there any temperature operating range considerations?

A: The substitute specifies -40°C to 85°C operating temperature range. The original part does not provide temperature specification in available documentation. The substitute's specified range covers standard industrial and commercial operating conditions.

Q: What is the impact of the lower DC resistance in the substitute?

A: The 65mOhm DCR of the substitute versus 122mOhm of the original results in approximately 47% lower resistive losses. This reduces power dissipation and heat generation in the inductor, improving overall circuit efficiency.

Q: Is PCB layout modification necessary for the substitute?

A: The substitute footprint is larger in length (4.70mm versus 4.00mm), width (4.50mm versus 3.80mm), and height (1.80mm versus 1.40mm). PCB layout review is required to confirm adequate clearance and component placement compatibility.

Q: Are both parts available in equivalent packaging formats?

A: The original CDH3D13SNP-2R5MC is obsolete with limited inventory. The Murata substitute is active production with 3020 pieces in stock, available in Tape & Reel packaging suitable for automated assembly processes.