CDH113NP-271KC Equivalent & Substitute Parts

Part Overview

The CDH113NP-271KC is a 270 µH unshielded wirewound surface mount inductor manufactured by Sumida America Components Inc. This component is rated for 370 mA maximum current with a DC resistance of 1.13 Ohm maximum and operates across a temperature range of -30°C to 100°C. The part is classified as obsolete, necessitating identification of active equivalent components for ongoing design support and procurement continuity.

Substiute Parts

CDH113NP-271KC

Sumida America Components Inc.In Stock: 1004CDH113NP-271KC Datasheet

Current PartRFQ

CDH115NP-271KC

Sumida America Components Inc.In Stock: 1098CDH115NP-271KC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH113NP-271KC is determined by the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match):

• Inductance value: 270 µH at 1 kHz test frequency
• Inductance tolerance: ±10%
• Shielding type: Unshielded
• Mounting type: Surface Mount
• Physical footprint: 0.441" L x 0.433" W (11.20mm x 11.00mm)
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Flexible Parameters (May Vary Within Application Limits):

• Current rating: Substitute must equal or exceed 370 mA
• DC resistance: Substitute must equal or be lower than 1.13 Ohm
• Operating temperature range: Substitute must cover or exceed -30°C ~ 100°C
• Height: Substitute must not exceed 0.146" (3.70mm) seated height for PCB clearance compatibility
• Product status: Active status preferred for long-term availability

The CDH115NP-271KC qualifies as a substitute based on matching inductance, tolerance, shielding, mounting type, and footprint dimensions, while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The CDH115NP-271KC is the designated substitute for the obsolete CDH113NP-271KC based on the following engineering criteria:

Electrical Compatibility: The substitute part maintains the identical 270 µH inductance value and ±10% tolerance at 1 kHz test frequency, ensuring equivalent circuit performance. The CDH115NP-271KC provides superior electrical characteristics with 590 mA current rating (59% higher than the 370 mA original specification) and reduced DC resistance of 730 mOhm maximum (35% lower than the 1.13 Ohm original specification). These improvements result in lower power dissipation and enhanced thermal performance in the application.

Mechanical and Thermal Compatibility: Both parts share identical footprint dimensions of 0.441" L x 0.433" W (11.20mm x 11.00mm), enabling direct PCB layout compatibility. The substitute exhibits a taller seated height of 0.205" (5.20mm) compared to the original 0.146" (3.70mm), requiring verification of available vertical clearance on the target PCB assembly. The CDH115NP-271KC operates across -40°C to 100°C, extending the lower temperature limit by 10°C relative to the original part.

Compliance and Availability: Both components maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring equivalent environmental and moisture handling requirements. The CDH115NP-271KC holds active product status with 1083 pieces in current inventory, providing long-term procurement security compared to the obsolete CDH113NP-271KC.

Critical Design Consideration: PCB vertical clearance must be evaluated prior to substitution due to the 0.059" (1.50mm) height increase of the CDH115NP-271KC. If clearance constraints exist, alternative 270 µH inductors with lower profile packages must be sourced.

Frequently Asked Questions (FAQ)

Q: Can the CDH115NP-271KC be used as a direct replacement for the CDH113NP-271KC without circuit redesign?

A: The CDH115NP-271KC is electrically compatible for circuits where the 370 mA current rating of the original part was not at maximum utilization. The identical inductance value, tolerance, and unshielded configuration ensure equivalent circuit behavior. However, PCB layout verification is required to confirm adequate vertical clearance, as the substitute is 0.059" (1.50mm) taller.

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

A: The primary differences are: (1) Current rating increased from 370 mA to 590 mA; (2) DC resistance decreased from 1.13 Ohm to 730 mOhm; (3) Seated height increased from 0.146" to 0.205"; (4) Operating temperature range extended from -30°C to -40°C at the lower limit; (5) Core construction changed from standard wirewound to drum core wirewound; (6) Product status changed from obsolete to active. All other parameters remain equivalent.

Q: Are the footprints identical between CDH113NP-271KC and CDH115NP-271KC?

A: The lateral footprint dimensions are identical at 0.441" L x 0.433" W (11.20mm x 11.00mm). The vertical height differs, with the CDH115NP-271KC measuring 0.205" (5.20mm) maximum seated height compared to 0.146" (3.70mm) for the original part. PCB clearance above the component must be verified.

Q: Will the lower DC resistance of the CDH115NP-271KC affect circuit performance?

A: The reduced DC resistance of 730 mOhm (versus 1.13 Ohm) results in lower resistive losses and reduced heat generation during operation. This improvement is beneficial for most applications and does not negatively impact circuit function. Applications with specific impedance matching requirements should be reviewed by the design engineer.

Q: What is the packaging difference between these parts?

A: The CDH113NP-271KC is supplied in standard packaging, while the CDH115NP-271KC is packaged in Tape & Reel (TR) format. Both maintain MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Tape & Reel packaging is standard for high-volume surface mount assembly processes.

Q: Is the CDH115NP-271KC available for immediate procurement?

A: Yes, the CDH115NP-271KC is classified as active product status with 1083 pieces in current inventory, ensuring availability for new designs and production orders. The original CDH113NP-271KC is obsolete with no ongoing manufacturing.