CDH3D13SNP-1R2MC Equivalent & Substitute Parts

Part Overview

The CDH3D13SNP-1R2MC is a 1.2 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. with a current rating of 2.55 A and maximum DC resistance of 75mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity. The part operates at 100 kHz inductance test frequency and is housed in a nonstandard 4.00mm × 3.80mm package with 1.40mm maximum seated height.

Substiute Parts

CDH3D13SNP-1R2MC

Sumida America Components Inc.In Stock: 713CDH3D13SNP-1R2MC Datasheet

Current PartRFQ

1231AS-H-1R2N=P3

Murata ElectronicsIn Stock: 34351231AS-H-1R2N=P3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH3D13SNP-1R2MC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 1.2 µH (exact match required)
• Mounting type: Surface Mount (exact match required)
• Current rating: minimum 2.55 A
• DC resistance: maximum 75mOhm
• Inductance test frequency: 100 kHz

Secondary Compatibility Factors:

• Package dimensions and height constraints
• Shielding configuration (unshielded vs. shielded)
• Inductance tolerance range
• Saturation current characteristics
• RoHS and MSL compliance

The substitute part 1231AS-H-1R2N=P3 from Murata Electronics satisfies the primary matching criteria with identical inductance value and surface mount configuration. The substitute provides higher current rating (2.9 A vs. 2.55 A) and superior DC resistance performance (36mOhm vs. 75mOhm maximum). Physical dimensions are comparable within nonstandard package specifications. The substitute is classified as active product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The 1231AS-H-1R2N=P3 from Murata Electronics is a qualified substitute for the obsolete CDH3D13SNP-1R2MC based on the following engineering factors:

Electrical Performance: The substitute part meets or exceeds all critical electrical parameters. Inductance value is identical at 1.2 µH with compatible tolerance specifications. Current rating of 2.9 A exceeds the original 2.55 A requirement, and saturation current of 2.4 A provides improved margin over the original 1.85 A specification. DC resistance of 36mOhm is significantly lower than the original 75mOhm maximum, resulting in reduced power dissipation and improved thermal performance.

Compliance & Certification: Both parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring compatibility with modern manufacturing and storage requirements. The substitute part carries active product status from Murata Electronics, guaranteeing long-term availability and supply chain stability.

Physical Considerations: Package dimensions are comparable within nonstandard specifications. The substitute height of 1.80mm exceeds the original 1.40mm maximum by 0.40mm. PCB layout verification is required to confirm clearance compatibility in space-constrained applications.

Shielding Difference: The substitute features shielded construction versus the original unshielded design. Shielded inductors provide improved electromagnetic interference (EMI) performance and reduced coupling to adjacent circuit elements. This represents an enhancement for most applications but requires verification in designs with specific unshielded inductor requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1231AS-H-1R2N=P3 be used as a direct replacement for CDH3D13SNP-1R2MC?

A: The 1231AS-H-1R2N=P3 is electrically compatible as a substitute. Inductance values are identical, and electrical performance parameters meet or exceed original specifications. Physical verification is required due to height difference (1.80mm vs. 1.40mm) and shielding configuration change (shielded vs. unshielded).

Q: What are the key differences between these two inductors?

A: Primary differences include: (1) Shielding configuration—substitute is shielded versus original unshielded; (2) DC resistance—substitute provides 36mOhm versus original 75mOhm maximum; (3) Physical height—substitute is 1.80mm versus original 1.40mm; (4) Product status—substitute is active versus original obsolete; (5) Manufacturer—Murata Electronics versus Sumida America Components Inc.

Q: Will the increased height of the substitute part affect PCB layout?

A: The substitute part height of 1.80mm exceeds the original 1.40mm by 0.40mm. PCB layout clearance must be verified, particularly in applications with height constraints or proximity to other components. Mechanical interference analysis is required before design implementation.

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

A: Shielded inductors reduce electromagnetic coupling to adjacent circuit elements and improve EMI performance. For most applications, this represents an enhancement. Designs requiring specific unshielded inductor characteristics must be evaluated individually.

Q: Are both parts RoHS compliant?

A: Yes. Both CDH3D13SNP-1R2MC and 1231AS-H-1R2N=P3 are ROHS3 compliant and carry MSL rating of 1 (Unlimited), meeting current environmental and manufacturing standards.

Q: What is the inductance tolerance difference between these parts?

A: CDH3D13SNP-1R2MC specifies ±20% tolerance, while 1231AS-H-1R2N=P3 specifies ±30% tolerance. Both tolerances are compatible for most circuit applications. Circuit designs with tight inductance tolerance requirements must verify acceptability of the ±30% specification.

Q: Is the substitute part available in the same packaging format?

A: The substitute part 1231AS-H-1R2N=P3 is supplied in Tape & Reel (TR) packaging, while the original part packaging format is not specified. Packaging format compatibility with assembly equipment must be verified.