CDH113NP-121KC Equivalent & Substitute Parts

Part Overview

The CDH113NP-121KC is a 120 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 560 mA continuous current with a maximum DC resistance of 490mOhm. This surface mount component operates across the temperature range of -30°C to 100°C and is RoHS3 compliant with MSL 1 rating.

The CDH113NP-121KC is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductance value and current rating.

Substiute Parts

CDH113NP-121KC

Sumida America Components Inc.In Stock: 1085CDH113NP-121KC Datasheet

Current PartRFQ

CDH115NP-121KC

Sumida America Components Inc.In Stock: 865CDH115NP-121KC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDH113NP-121KC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 120 µH (±10% tolerance)
• Inductance test frequency: 1 kHz
• Mounting type: Surface Mount
• Shielding configuration: Unshielded
• Physical footprint: 0.441" L × 0.433" W (11.20mm × 11.00mm)

Secondary Compatibility Factors:

• Current rating must equal or exceed 560 mA
• DC resistance must not exceed 490mOhm maximum
• Operating temperature range must encompass or exceed -30°C to 100°C
• RoHS3 compliance and MSL 1 rating required

The CDH115NP-121KC qualifies as a direct substitute based on matching inductance, tolerance, footprint dimensions, mounting type, shielding, and regulatory compliance. The substitute part demonstrates improved electrical performance through higher current rating and lower DC resistance.

Parameter Comparison

Engineering Selection Recommendations

The CDH115NP-121KC is the qualified substitute for the obsolete CDH113NP-121KC based on the following engineering criteria:

Electrical Compatibility: Both inductors maintain identical inductance values (120 µH) at the specified test frequency (1 kHz) with matching tolerance (±10%). The substitute part exceeds the current rating requirement (880 mA versus 560 mA) and provides superior DC resistance performance (290 mOhm maximum versus 490 mOhm maximum), resulting in lower power dissipation and improved thermal characteristics.

Mechanical and Environmental Compatibility: The substitute part shares identical surface mount footprint dimensions (0.441" L × 0.433" W), enabling direct PCB layout compatibility. The CDH115NP-121KC operates across an extended temperature range (-40°C to 100°C) that encompasses the original part's operating window (-30°C to 100°C).

Regulatory and Supply Status: Both parts maintain ROHS3 compliance and MSL 1 rating. The CDH115NP-121KC is actively manufactured and available in production quantities, eliminating obsolescence risk associated with the CDH113NP-121KC.

Height Consideration: The substitute part has a maximum seated height of 0.205" (5.20mm) compared to the original part's 0.146" (3.70mm). PCB layout clearance verification is required for applications with height-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the CDH115NP-121KC be used as a direct replacement for the CDH113NP-121KC in existing designs?

A: The CDH115NP-121KC is electrically and mechanically compatible for direct substitution in applications where the increased height (0.205" versus 0.146" maximum seated height) does not create PCB clearance conflicts. Identical inductance, tolerance, footprint, and mounting type ensure functional equivalence. The substitute part's superior current rating and lower DC resistance provide performance margin.

Q: What are the key differences between these two inductors?

A: The primary differences are: (1) Current rating: CDH115NP-121KC rated for 880 mA versus CDH113NP-121KC at 560 mA; (2) DC resistance: CDH115NP-121KC maximum 290 mOhm versus CDH113NP-121KC maximum 490 mOhm; (3) Core construction: CDH115NP-121KC uses drum core ferrite construction versus CDH113NP-121KC wirewound construction; (4) Operating temperature lower limit: CDH115NP-121KC extends to -40°C versus CDH113NP-121KC at -30°C; (5) Product status: CDH115NP-121KC is active production versus CDH113NP-121KC obsolete; (6) Component height: CDH115NP-121KC is 0.205" versus CDH113NP-121KC at 0.146" maximum seated height.

Q: Are there any packaging differences between these parts?

A: The CDH113NP-121KC packaging information is not specified in the available data. The CDH115NP-121KC is supplied in Tape & Reel (TR) packaging format, which is standard for high-volume surface mount production. Packaging compatibility should be verified with your procurement requirements.

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

A: The CDH115NP-121KC's lower maximum DC resistance (290 mOhm versus 490 mOhm) reduces resistive power dissipation at rated current levels. At 560 mA, the original part dissipates up to 0.1526 watts, while the substitute dissipates up to 0.0907 watts. This improvement reduces thermal stress on the component and surrounding circuitry, enhancing reliability and thermal margin.

Q: Is the extended temperature range of the CDH115NP-121KC a concern?

A: No. The CDH115NP-121KC's extended lower temperature limit (-40°C versus -30°C) provides additional environmental margin and does not create incompatibility. The upper temperature limit (100°C) remains identical. Extended temperature range capability is a performance advantage for applications requiring operation in wider environmental conditions.

Q: Must PCB layout be modified to accommodate the substitute part?

A: The identical footprint (0.441" L × 0.433" W) allows direct PCB placement without modification. However, the increased component height (0.205" maximum versus 0.146" maximum) requires verification of clearance above the component. If the original design has minimal clearance for conformal coating, potting, or mechanical constraints, layout review is necessary.