CDH63NP-3R3MC Equivalent & Substitute Parts

Part Overview

The CDH63NP-3R3MC is a 3.3 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 1.8 A continuous current with a maximum DC resistance of 70 mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates at 100 kHz inductance test frequency and is packaged in a nonstandard surface mount configuration measuring 6.30mm × 6.10mm × 2.90mm (max height).

Substiute Parts

CDH63NP-3R3MC

Sumida America Components Inc.In Stock: 1039CDH63NP-3R3MC Datasheet

Current PartRFQ

B82462A4332M000

EPCOS - TDK ElectronicsIn Stock: 3561B82462A4332M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH63NP-3R3MC is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 3.3 µH (±20% tolerance band)
• Inductance test frequency: 100 kHz
• Shielding configuration: Unshielded
• Inductor construction type: Wirewound
• Mounting technology: Surface Mount

Secondary Compatibility Criteria:

• Current rating must equal or exceed 1.8 A continuous
• DC resistance must not exceed 70 mOhm
• Saturation current (Isat) must support circuit peak current requirements
• Physical dimensions must accommodate PCB layout constraints
• RoHS3 compliance and MSL rating must match or exceed original specification

The B82462A4332M000 from EPCOS - TDK Electronics satisfies all primary and secondary criteria, with enhanced performance characteristics in current rating and DC resistance.

Parameter Comparison

Engineering Selection Recommendations

The B82462A4332M000 is a direct functional substitute for the obsolete CDH63NP-3R3MC based on the following engineering criteria:

Electrical Equivalence: Both inductors deliver 3.3 µH inductance at 100 kHz test frequency with ±20% tolerance. The substitute provides superior electrical performance with 2 A continuous current rating versus 1.8 A, and lower DC resistance of 60 mOhm maximum compared to 70 mOhm maximum.

Compliance & Certification: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. The B82462A4332M000 carries AEC-Q200 automotive qualification and specifies operating temperature range of -55°C to 150°C, providing additional design documentation for applications requiring temperature performance data.

Physical Compatibility: Footprint dimensions are compatible. The substitute measures 6.00mm × 6.00mm with 3.00mm maximum seated height, compared to the original 6.30mm × 6.10mm × 2.90mm. These minor dimensional differences remain within typical PCB layout tolerances for surface mount placement.

Product Availability: The substitute is classified as Active product status with 3498 pieces in stock, ensuring procurement continuity for the obsolete CDH63NP-3R3MC.

Core Construction: The substitute employs drum core wirewound construction versus standard wirewound, which provides improved thermal performance and mechanical stability without affecting electrical equivalence at the specified inductance and frequency parameters.

Frequently Asked Questions (FAQ)

Q: Can the B82462A4332M000 directly replace the CDH63NP-3R3MC in existing designs?

A: Yes. Both inductors meet the primary electrical specifications: 3.3 µH inductance at ±20% tolerance, unshielded wirewound construction, and surface mount packaging. The substitute exceeds the original current rating (2 A vs. 1.8 A) and provides lower DC resistance (60 mOhm vs. 70 mOhm maximum), making it functionally equivalent and electrically superior for the same circuit application.

Q: What are the physical footprint differences?

A: The B82462A4332M000 measures 6.00mm × 6.00mm × 3.00mm (max height) compared to the CDH63NP-3R3MC at 6.30mm × 6.10mm × 2.90mm (max height). The substitute is slightly smaller in length and width but 0.10mm taller. These differences are within standard PCB layout tolerances for surface mount components and do not require design modification.

Q: Are there compliance or certification differences?

A: Both parts are ROHS3 compliant with MSL 1 (Unlimited) rating. The substitute provides additional documentation: AEC-Q200 automotive qualification and specified operating temperature range of -55°C to 150°C. The original part does not specify operating temperature or automotive ratings in the provided data.

Q: Why is the original part obsolete?

A: The CDH63NP-3R3MC is classified as obsolete by the manufacturer. The B82462A4332M000 is an active product from EPCOS - TDK Electronics with confirmed inventory availability (3498 pieces in stock), ensuring long-term procurement support.

Q: What is the difference between wirewound and drum core wirewound construction?

A: Both are wirewound inductors. The drum core variant used in the B82462A4332M000 employs a cylindrical ferrite core structure that provides improved thermal dissipation and mechanical robustness compared to standard wirewound designs. Electrical performance at 100 kHz test frequency remains equivalent.

Q: Are there any circuit performance differences I should verify?

A: The inductance values, tolerances, and test frequencies are identical. The substitute's lower DC resistance (60 mOhm vs. 70 mOhm) reduces resistive losses. The higher saturation current (3.2 A vs. 2.2 A) provides additional margin for transient current peaks. These represent performance improvements with no negative impact on circuit operation.

Q: What is the self-resonant frequency significance?

A: The B82462A4332M000 specifies self-resonant frequency of 60 MHz. The original part does not provide this specification. Self-resonant frequency defines the upper frequency limit where the inductor behaves as a pure inductance. At 60 MHz, the substitute remains suitable for applications operating well below this frequency threshold, including the 100 kHz test frequency specified for both parts.