CDH3D13SNP-150MC Equivalent & Substitute Parts

Part Overview

The CDH3D13SNP-150MC is a 15 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This component is rated for 900 mA continuous current with a maximum DC resistance of 550 mOhm and operates at an inductance test frequency of 100 kHz. The part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

CDH3D13SNP-150MC

Sumida America Components Inc.In Stock: 850CDH3D13SNP-150MC Datasheet

Current PartRFQ

1231AS-H-150M=P3

Murata ElectronicsIn Stock: 19771231AS-H-150M=P3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH3D13SNP-150MC is determined by the following critical parameters:

Inductance Value: The substitute must provide 15 µH inductance with ±20% tolerance at 100 kHz test frequency.

Current Handling: The substitute must support the application's current requirements. The main part is rated for 900 mA continuous current with 550 mA saturation current. Substitute parts with equal or higher current ratings are acceptable.

DC Resistance: The substitute's maximum DC resistance must not exceed the application's thermal and efficiency requirements. Lower DCR values improve performance.

Mounting and Package: The substitute must be surface mount compatible with physical dimensions that fit the PCB layout constraints (approximately 4.00 mm x 3.80 mm footprint).

Compliance: Both parts must maintain ROHS3 compliance and MSL 1 rating for manufacturing compatibility.

The identified substitute, Murata Electronics 1231AS-H-150M=P3, meets these criteria with matching inductance, higher current rating, lower DC resistance, and compatible surface mount packaging.

Parameter Comparison

Engineering Selection Recommendations

The Murata Electronics 1231AS-H-150M=P3 is qualified as a substitute for the obsolete CDH3D13SNP-150MC based on the following engineering criteria:

Electrical Compatibility: Both parts provide identical 15 µH inductance at ±20% tolerance and 100 kHz test frequency. The substitute's higher current rating (1.1 A versus 900 mA) and improved saturation current (800 mA versus 550 mA) provide additional design margin. The substitute's significantly lower DC resistance (222 mOhm versus 550 mOhm) reduces power dissipation and thermal effects.

Compliance Status: Both components maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with current manufacturing processes and environmental regulations.

Product Availability: The main part is obsolete with limited inventory (815 pieces). The substitute is active production with higher inventory availability (1,927 pieces), supporting long-term procurement requirements.

Physical Considerations: The substitute's dimensions (3.70 mm x 3.90 mm x 1.80 mm) are comparable to the main part (4.00 mm x 3.80 mm x 1.40 mm). The height difference of 0.40 mm requires verification against PCB layout constraints and clearance requirements.

Shielding Difference: The substitute features shielding while the main part is unshielded. Shielded construction reduces electromagnetic interference emission and susceptibility, which is generally beneficial in most applications.

Frequently Asked Questions (FAQ)

Q: Can the 1231AS-H-150M=P3 directly replace the CDH3D13SNP-150MC in all applications?

A: The substitute meets the core electrical requirements: identical inductance value, higher current rating, and lower DC resistance. However, the 0.40 mm height difference and shielded versus unshielded construction require verification against specific PCB layout and electromagnetic compatibility requirements.

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

A: The substitute's 222 mOhm DCR compared to the main part's 550 mOhm represents a 60% reduction in resistance. This decreases power dissipation (I²R losses), reduces heat generation, and improves overall circuit efficiency. For a 900 mA application, this represents approximately 0.36 W less power dissipation.

Q: Why does the substitute have a higher current rating?

A: The Murata part is rated for 1.1 A continuous current with 800 mA saturation current, compared to the main part's 900 mA and 550 mA ratings. This provides additional design margin and allows the component to operate with reduced stress, extending component life and improving reliability.

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

A: Shielding reduces electromagnetic field radiation and improves immunity to external interference. In most applications, this is beneficial. However, shielded inductors may exhibit slightly different frequency response characteristics. Verification through circuit simulation or testing is appropriate for noise-sensitive applications.

Q: Are there any packaging or handling differences between these parts?

A: Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating, requiring identical storage and handling procedures. The substitute is supplied in Tape & Reel packaging, which is standard for high-volume manufacturing. Both parts are ROHS3 compliant.

Q: What is the impact of the physical dimension differences?

A: The substitute is slightly smaller in length (3.70 mm versus 4.00 mm) and width (3.90 mm versus 3.80 mm), but taller (1.80 mm versus 1.40 mm). PCB layout verification is necessary to confirm the height increase does not conflict with component placement, solder reflow profiles, or clearance to adjacent components.

Q: Is the ±20% inductance tolerance the same for both parts?

A: Yes, both parts specify ±20% inductance tolerance at 100 kHz test frequency. This ensures equivalent inductance accuracy and circuit performance predictability.