CDH63NP-8R2MC Equivalent & Substitute Parts

Part Overview

The CDH63NP-8R2MC is an 8.2 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 1.2 A continuous current with a maximum DC resistance of 184 mOhm. 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 and complies with ROHS3 standards with MSL Level 1 rating.

Substiute Parts

CDH63NP-8R2MC

Sumida America Components Inc.In Stock: 755CDH63NP-8R2MC Datasheet

Current PartRFQ

SDR0703-8R2ML

Bourns Inc.In Stock: 1014SDR0703-8R2ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH63NP-8R2MC is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

• Inductance value: 8.2 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• RoHS3 compliance and MSL Level 1 rating

Secondary Compatibility Factors:

• Current rating must meet or exceed 1.2 A continuous operation
• DC resistance must not exceed 184 mOhm maximum
• Saturation current (Isat) must support the application's peak current requirements

The SDR0703-8R2ML from Bourns Inc. meets all primary matching criteria and provides equivalent electrical performance within the specified parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

The SDR0703-8R2ML is a suitable substitute for the obsolete CDH63NP-8R2MC based on the following engineering factors:

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

Electrical Equivalence: The inductance value of 8.2 µH with ±20% tolerance is identical across both parts at the 100 kHz test frequency. Both components are unshielded wirewound inductors suitable for surface mount applications.

Current Handling: The SDR0703-8R2ML is rated for 1.1 A continuous current, which is 0.1 A lower than the CDH63NP-8R2MC's 1.2 A rating. However, the substitute provides a higher saturation current of 1.5 A compared to 1.28 A. Selection depends on whether the application requires the full 1.2 A continuous rating or operates below this threshold.

DC Resistance Performance: The SDR0703-8R2ML provides superior DC resistance performance at 150 mOhm maximum, compared to 184 mOhm maximum for the original part. This represents a 18% reduction in resistive losses.

Active Manufacturing Status: The SDR0703-8R2ML is actively manufactured by Bourns Inc., ensuring long-term availability and supply chain continuity compared to the obsolete CDH63NP-8R2MC.

Physical Dimensions: The substitute part has slightly different dimensions (6.50mm L x 4.50mm W x 2.70mm H) compared to the original (6.30mm L x 6.10mm W x 2.90mm H). PCB layout verification is required to confirm mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can the SDR0703-8R2ML directly replace the CDH63NP-8R2MC without circuit modifications?

A: The SDR0703-8R2ML provides electrical equivalence in inductance value, tolerance, and shielding configuration. However, the 0.1 A lower continuous current rating and different physical dimensions require verification. If the application operates at or near 1.2 A continuous current, the substitute's 1.1 A rating may be insufficient. PCB layout must be verified for the different package dimensions.

Q: What is the significance of the different core materials?

A: The CDH63NP-8R2MC uses a standard wirewound construction, while the SDR0703-8R2ML uses a drum core wirewound design with ferrite material. Both achieve the same 8.2 µH inductance at 100 kHz, but the different core geometry may affect high-frequency behavior and EMI characteristics. The substitute provides a specified self-resonant frequency of 40 MHz and Q factor of 20 @ 7.96 MHz, which are not specified for the original part.

Q: Are there any packaging considerations for procurement?

A: The CDH63NP-8R2MC is supplied in nonstandard packaging, while the SDR0703-8R2ML is supplied in Tape & Reel (TR) format. This difference affects handling, storage, and automated assembly processes. Verify that your manufacturing process can accommodate the TR packaging format.

Q: How does the lower DC resistance of the substitute affect circuit performance?

A: The SDR0703-8R2ML's 150 mOhm maximum DC resistance is 34 mOhm lower than the original part's 184 mOhm maximum. This reduction decreases resistive losses and heat generation in the inductor, potentially improving overall circuit efficiency. This is a beneficial characteristic for direct substitution.

Q: What is the operating temperature range for the substitute part?

A: The SDR0703-8R2ML is specified for operation from -40°C to 125°C. The original CDH63NP-8R2MC does not provide an operating temperature specification. If your application requires operation outside the -40°C to 125°C range, additional verification is necessary.

Q: Is the substitute part suitable for high-frequency applications?

A: The SDR0703-8R2ML provides a self-resonant frequency of 40 MHz and Q factor of 20 @ 7.96 MHz. These specifications indicate suitability for applications up to several megahertz. Both parts are tested at 100 kHz, which is the standard inductance measurement frequency for this component category.