CDH63NP-270MC Equivalent & Substitute Parts

Part Overview

The CDH63NP-270MC is a 27 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 630 mA continuous current with a maximum DC resistance of 580 mOhm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part is surface-mounted in a nonstandard package measuring 6.30mm × 6.10mm × 2.90mm (max height) and complies with ROHS3 standards.

Substiute Parts

CDH63NP-270MC

Sumida America Components Inc.In Stock: 1141CDH63NP-270MC Datasheet

Current PartRFQ

SPD62R-273M

API Delevan Inc.In Stock: 879SPD62R-273M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH63NP-270MC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 27 µH (±20% tolerance band)
• Current rating: minimum 630 mA continuous
• Saturation current: minimum 750 mA
• DC resistance: 580 mOhm or lower
• Mounting type: Surface Mount
• Package compatibility: Nonstandard form factor within acceptable dimensional variance

Secondary Compatibility Factors:

• RoHS3 compliance
• MSL rating of 1 or better
• Wirewound construction type

The substitute part SPD62R-273M meets these criteria with enhanced electrical performance characteristics, including higher current rating (940 mA), lower DC resistance (450 mOhm), and active product status.

Parameter Comparison

Engineering Selection Recommendations

The SPD62R-273M from API Delevan Inc. is a qualified substitute for the obsolete CDH63NP-270MC. Selection rationale is based on the following engineering factors:

Electrical Compatibility: The substitute part maintains the same 27 µH inductance value with identical ±20% tolerance. The SPD62R-273M exceeds the current rating requirement with 940 mA continuous current versus the original 630 mA specification, and provides superior DC resistance performance at 450 mOhm maximum compared to 580 mOhm maximum of the original part.

Product Status and Availability: The CDH63NP-270MC is classified as obsolete, making the active-status SPD62R-273M the appropriate long-term solution for new designs and ongoing production requirements.

Regulatory Compliance: Both parts maintain ROHS3 compliance and MSL rating of 1, ensuring compatibility with current manufacturing and environmental standards.

Physical Considerations: Dimensional variance between parts is minimal (0.30mm length, 0.10mm width, 0.10mm height increase). PCB layout and thermal management characteristics remain substantially equivalent for standard applications.

Design Margin: The substitute part provides improved electrical performance with lower DC resistance and higher current saturation rating, offering additional design margin for thermal and current-handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the SPD62R-273M directly replace the CDH63NP-270MC in existing designs?

A: Yes. Both parts share the same 27 µH inductance value, ±20% tolerance, and surface-mount configuration. The substitute part provides equal or superior electrical performance across all critical parameters. Minor dimensional differences (maximum 0.30mm) are within typical PCB layout tolerances for nonstandard packages.

Q: What is the significance of the shielding difference between the two parts?

A: The CDH63NP-270MC is unshielded, while the SPD62R-273M features shielding. Shielded construction reduces electromagnetic interference coupling to adjacent circuit elements. For applications sensitive to EMI, the shielded substitute may provide improved performance. For applications where shielding is not required, the substitute remains fully compatible.

Q: How do the DC resistance values affect circuit performance?

A: The SPD62R-273M provides 450 mOhm maximum DC resistance compared to 580 mOhm maximum for the original part. Lower DC resistance reduces resistive losses and heat generation during operation. For current-limited applications, this improvement enhances efficiency and thermal performance.

Q: Are there packaging or moisture sensitivity concerns with substitution?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions. Both are supplied in nonstandard surface-mount packages. Packaging format differs (original status unknown; substitute supplied in Tape & Reel), but component-level moisture handling requirements are equivalent.

Q: What is the impact of different inductance test frequencies?

A: The CDH63NP-270MC is tested at 100 kHz, while the SPD62R-273M is tested at 1 kHz. Both measurements confirm the 27 µH nominal inductance within ±20% tolerance. Frequency-dependent inductance variation is normal for wirewound inductors; both parts are suitable for applications across standard frequency ranges.

Q: Is the higher saturation current of the substitute part a concern?

A: No. The SPD62R-273M saturation current of 940 mA exceeds the original 750 mA specification. Higher saturation current provides additional design margin and reduces the risk of inductor saturation under transient current conditions.