CDH113NP-391KC Equivalent & Substitute Parts

Part Overview

The CDH113NP-391KC is a 390 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 310 mA maximum current with 1.6Ohm DC resistance. This component is designed for surface mount applications in nonstandard package configurations. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

CDH113NP-391KC

Sumida America Components Inc.In Stock: 774CDH113NP-391KC Datasheet

Current PartRFQ

CDH115NP-391KC

Sumida America Components Inc.In Stock: 662CDH115NP-391KC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDH113NP-391KC is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 390 µH inductance at 1 kHz test frequency with ±10% tolerance to ensure circuit performance equivalence.

Mounting Configuration: Both the main part and substitute must be surface mount components with compatible physical footprints (11.20mm L x 11.00mm W base dimensions).

Electrical Ratings: The substitute must support the application's current requirements. While the CDH113NP-391KC is rated for 310 mA, a substitute with equal or higher current rating is acceptable for direct replacement.

DC Resistance: The substitute's DCR must be compatible with circuit impedance requirements. Lower DCR values indicate improved efficiency characteristics.

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

Shielding Configuration: Both parts are unshielded wirewound inductors, maintaining electromagnetic interference characteristics.

The CDH115NP-391KC qualifies as a direct substitute based on matching inductance, tolerance, mounting type, physical footprint, compliance certifications, and exceeding the current rating specification.

Parameter Comparison

Engineering Selection Recommendations

The CDH115NP-391KC is a qualified substitute for the obsolete CDH113NP-391KC based on the following engineering criteria:

Electrical Equivalence: Both inductors maintain identical 390 µH inductance values at ±10% tolerance with 1 kHz test frequency. The substitute's lower maximum DCR (1.1Ohm versus 1.6Ohm) provides improved efficiency characteristics without compromising circuit function.

Current Capacity: The CDH115NP-391KC current rating of 480 mA exceeds the original 310 mA specification, providing additional design margin and thermal headroom for the application.

Compliance and Certification: Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring manufacturing process compatibility and environmental regulatory adherence.

Product Status: The CDH115NP-391KC is classified as active product with confirmed inventory availability (638 Pcs), whereas the original part is obsolete. This substitution ensures long-term procurement viability and supply chain continuity.

Physical Compatibility: Identical base footprint dimensions (11.20mm x 11.00mm) support direct PCB layout compatibility. The increased seated height (5.20mm versus 3.70mm) must be verified against available vertical clearance in the target application.

Temperature Performance: The substitute's extended operating temperature range (-40°C to 100°C versus -30°C to 100°C) provides broader environmental operating capability.

Frequently Asked Questions (FAQ)

Q: Can the CDH115NP-391KC be used as a direct replacement for the CDH113NP-391KC?

A: Yes. Both inductors share identical inductance (390 µH), tolerance (±10%), mounting type (surface mount), and base footprint dimensions (11.20mm x 11.00mm). The substitute meets or exceeds all critical electrical parameters. Physical clearance verification is required due to the 1.5mm height difference.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The CDH115NP-391KC maximum DCR of 1.1Ohm compared to the original 1.6Ohm represents approximately 31% lower resistance. This reduces power dissipation and heat generation in the inductor, improving overall circuit efficiency. Applications with tight thermal budgets benefit from this characteristic.

Q: Are there any packaging differences between these parts?

A: The CDH113NP-391KC packaging information is not specified in available data. The CDH115NP-391KC is supplied in Tape & Reel (TR) format. Confirm packaging requirements with your procurement process.

Q: Does the increased current rating of the substitute affect circuit operation?

A: No. The 480 mA rating of the CDH115NP-391KC exceeds the original 310 mA specification. Higher current ratings indicate greater thermal capacity and saturation margin. The substitute operates safely at or below the original design current.

Q: What is the impact of the increased seated height?

A: The CDH115NP-391KC seated height is 5.20mm compared to 3.70mm for the original part, representing a 1.5mm increase. Verify available vertical clearance on the PCB assembly. If clearance is insufficient, alternative substitutes may be required.

Q: Are both parts manufactured by the same company?

A: Yes. Both the CDH113NP-391KC and CDH115NP-391KC are manufactured by Sumida America Components Inc., ensuring consistent design philosophy and quality standards.

Q: What does the drum core construction in the substitute part mean?

A: The CDH115NP-391KC uses drum core construction with ferrite material, compared to the standard wirewound design of the original part. Both are unshielded wirewound inductors. The drum core design contributes to the improved current rating and lower DCR characteristics.

Q: Is the extended temperature range of the substitute beneficial?

A: The CDH115NP-391KC operating range of -40°C to 100°C extends 10°C lower than the original -30°C to 100°C specification. This provides additional design margin for applications operating in cold environments or with thermal cycling requirements.