CDH63NP-820KC Equivalent & Substitute Parts

Part Overview

The CDH63NP-820KC is an 82 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 360 mA continuous current with a maximum DC resistance of 1.6 Ohm. This component is classified as obsolete product status. Locating equivalent substitute parts is necessary due to discontinued availability and the need for continued supply chain support in applications requiring fixed inductance filtering, energy storage, or signal conditioning circuits.

Substiute Parts

CDH63NP-820KC

Sumida America Components Inc.In Stock: 1042CDH63NP-820KC Datasheet

Current PartRFQ

SPD62R-823M

API Delevan Inc.In Stock: 1211SPD62R-823M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDH63NP-820KC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 82 µH (exact match required)
• Mounting type: Surface Mount (exact match required)
• Current rating: Minimum 360 mA (equal or greater acceptable)
• DC resistance: 1.6 Ohm or lower (lower values acceptable)
• RoHS3 compliance: Required for regulatory alignment

Secondary Compatibility Factors:

• Package footprint: Nonstandard form factor with dimensions 6.30 mm x 6.10 mm and height 2.90 mm maximum
• Saturation current: Minimum 440 mA (equal or greater acceptable)
• MSL rating: 1 (Unlimited) preferred for storage flexibility

The substitute part SPD62R-823M meets the primary matching criteria with identical inductance value, surface mount configuration, and superior current handling capability (500 mA rated, 500 mA saturation). Physical dimensions are comparable within acceptable tolerances for PCB layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

SPD62R-823M as Primary Substitute:

The SPD62R-823M is qualified as a direct substitute based on the following engineering factors:

1. Inductance Match: Both components provide 82 µH inductance, meeting the core functional requirement.

2. Current Capacity: The SPD62R-823M exceeds the original specification with 500 mA rated current versus 360 mA, providing operational margin and reduced thermal stress.

3. DC Resistance: The substitute exhibits lower DC resistance (1.45 Ohm Max versus 1.6 Ohm Max), resulting in reduced power dissipation and improved efficiency.

4. Regulatory Compliance: Both components maintain ROHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with manufacturing and storage requirements.

5. Product Status: The substitute is active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

6. Physical Compatibility: Dimensional differences are minimal (6.60 mm x 6.20 mm versus 6.30 mm x 6.10 mm, with 3.00 mm versus 2.90 mm height). PCB layout accommodation is required for the slightly larger footprint.

Design Considerations:

The SPD62R-823M introduces shielding (ferrite drum core) compared to the unshielded original design. This modification reduces electromagnetic interference emission and improves noise immunity in sensitive circuits. Inductance tolerance widens from ±10% to ±20%, which may require circuit validation in applications with tight tolerance requirements.

Frequently Asked Questions (FAQ)

Q: Can SPD62R-823M directly replace CDH63NP-820KC without PCB modification?

A: The substitute part is functionally compatible with the original specification. However, physical dimensions differ slightly (6.60 mm x 6.20 mm versus 6.30 mm x 6.10 mm footprint, and 3.00 mm versus 2.90 mm height). PCB layout review is necessary to confirm pad spacing and clearance compatibility. Tape & Reel packaging of the substitute may require different handling procedures compared to the original nonstandard packaging.

Q: What is the impact of the shielded design in SPD62R-823M?

A: The ferrite drum core shielding in SPD62R-823M reduces radiated electromagnetic interference compared to the unshielded CDH63NP-820KC. This characteristic is beneficial in noise-sensitive applications and does not negatively impact substitution compatibility. The shielding may slightly increase the effective inductance in high-frequency applications due to core material properties.

Q: How does the inductance tolerance difference affect circuit performance?

A: The CDH63NP-820KC specifies ±10% tolerance, while SPD62R-823M specifies ±20% tolerance. For applications requiring precise inductance values, circuit performance validation is necessary. In filtering and energy storage applications with moderate tolerance requirements, the ±20% specification remains acceptable for most standard designs.

Q: Is the higher current rating of SPD62R-823M (500 mA) a concern?

A: No. The higher current rating (500 mA versus 360 mA) and saturation current (500 mA versus 440 mA) of the substitute provide operational margin and thermal headroom. This characteristic improves component reliability and longevity in the application.

Q: Are there compliance or certification differences between the two parts?

A: Both components are ROHS3 compliant and carry MSL 1 (Unlimited) rating. No compliance barriers exist for substitution. The substitute part is active production status, ensuring continued regulatory support and supply availability.

Q: What is the DC resistance impact on circuit operation?

A: The SPD62R-823M exhibits lower DC resistance (1.45 Ohm Max versus 1.6 Ohm Max). This reduction decreases resistive losses and power dissipation, improving circuit efficiency. No negative impact on substitution compatibility exists.