CDH63NP-121KC Equivalent & Substitute Parts

Part Overview

The CDH63NP-121KC is a 120 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 300 mA continuous current with a maximum DC resistance of 2.4Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part is surface-mounted in a nonstandard package measuring 6.30mm × 6.10mm × 2.90mm (max height) and complies with ROHS3 standards with MSL 1 rating.

Substiute Parts

CDH63NP-121KC

Sumida America Components Inc.In Stock: 1196CDH63NP-121KC Datasheet

Current PartRFQ

SPD62R-124M

API Delevan Inc.In Stock: 1009SPD62R-124M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH63NP-121KC is determined by the following critical parameters:

Inductance Value: Both the main part and substitute must maintain 120 µH nominal inductance to preserve circuit function.

Current Rating: The substitute must support the application's current requirements. The CDH63NP-121KC is rated for 300 mA continuous current with 370 mA saturation current. Substitute parts must meet or exceed these current specifications.

DC Resistance: The DCR of 2.4Ohm maximum directly affects power dissipation and circuit performance. Substitute parts with lower DCR values provide improved efficiency.

Mounting and Package Compatibility: Both parts must be surface-mount components with compatible footprint dimensions to allow direct board-level substitution.

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

The SPD62R-124M qualifies as a substitute based on matching inductance value (120 µH), exceeding current rating (390 mA vs. 300 mA), providing superior DC resistance (1.7Ohm vs. 2.4Ohm), and maintaining identical compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The SPD62R-124M is a qualified substitute for the obsolete CDH63NP-121KC based on the following engineering criteria:

Electrical Compatibility: Both inductors maintain the same 120 µH inductance value. The SPD62R-124M provides superior current handling (390 mA vs. 300 mA) and lower DC resistance (1.7Ohm vs. 2.4Ohm), resulting in reduced power dissipation and improved thermal performance.

Product Status and Availability: The CDH63NP-121KC is obsolete with limited remaining inventory (1172 pcs). The SPD62R-124M is active production with confirmed inventory (943 pcs), ensuring long-term procurement viability.

Compliance Certification: Both parts maintain ROHS3 compliance and MSL 1 rating, satisfying manufacturing and environmental requirements without additional qualification.

Physical Footprint: Package dimensions differ marginally (6.60mm × 6.20mm × 3.00mm vs. 6.30mm × 6.10mm × 2.90mm). Verification of PCB layout clearances is required prior to implementation.

Shielding Consideration: The SPD62R-124M features shielded construction versus the unshielded CDH63NP-121KC. In applications sensitive to electromagnetic coupling, shielding provides additional noise isolation.

Frequently Asked Questions (FAQ)

Q: Can the SPD62R-124M directly replace the CDH63NP-121KC without circuit modification?

A: The SPD62R-124M is electrically compatible for applications requiring 120 µH inductance at 300 mA or lower current levels. The substitute provides superior performance characteristics (lower DCR, higher current rating). PCB layout verification is necessary to confirm physical footprint compatibility, as package dimensions differ by approximately 0.3mm in length and width and 0.1mm in height.

Q: What is the impact of the ±20% inductance tolerance on the SPD62R-124M compared to the ±10% tolerance of the CDH63NP-121KC?

A: The SPD62R-124M tolerance of ±20% is wider than the original ±10%. Applications with strict inductance value requirements must evaluate whether this tolerance range remains acceptable for circuit performance. Both parts maintain the same nominal 120 µH value.

Q: Does the shielded construction of the SPD62R-124M affect circuit behavior?

A: Shielded inductors reduce electromagnetic radiation and susceptibility to external fields compared to unshielded designs. In circuits where electromagnetic compatibility is a concern, the shielded SPD62R-124M may provide improved performance. In applications where shielding is not required, the shielded design does not negatively impact circuit function.

Q: Are both parts suitable for the same operating temperature range?

A: The CDH63NP-121KC operating temperature range is not specified in the provided data. The SPD62R-124M operates across -55°C to 125°C. Applications requiring operation outside this range require additional thermal analysis.

Q: What is the significance of the lower DC resistance in the SPD62R-124M?

A: The SPD62R-124M DCR of 1.7Ohm (versus 2.4Ohm) reduces resistive power loss by approximately 29% at rated current. This results in lower heat generation and improved efficiency, particularly in applications with continuous or high-duty-cycle current flow.

Q: Is the SPD62R-124M available in the same packaging format?

A: The SPD62R-124M is supplied in Tape & Reel (TR) packaging, whereas the CDH63NP-121KC packaging format is not specified. Confirm packaging compatibility with procurement and assembly requirements.