CDH53-270KC Equivalent & Substitute Parts

Part Overview

The CDH53-270KC is a 27 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 720 mA continuous current with a maximum DC resistance of 420 mOhm and operates across the temperature range of -30°C to 100°C. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

CDH53-270KC

Sumida America Components Inc.In Stock: 1050CDH53-270KC Datasheet

Current PartRFQ

CDH53NP-270KC

Sumida America Components Inc.In Stock: 917CDH53NP-270KC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH53-270KC is determined by strict equivalence across the following critical parameters:

• Inductance Value: 27 µH at 1 kHz test frequency
• Inductance Tolerance: ±10%
• Current Rating: 720 mA minimum
• DC Resistance: 420 mOhm maximum
• Core Type: Ferrite drum core, unshielded
• Mounting Configuration: Surface mount, nonstandard package
• Physical Dimensions: 6.00 mm × 5.20 mm × 3.20 mm (L × W × H)

The CDH53NP-270KC qualifies as a direct substitute because it maintains identical electrical specifications and physical form factor while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The CDH53NP-270KC is the direct equivalent substitute for the obsolete CDH53-270KC. Selection of the substitute part is justified on the following engineering and compliance grounds:

Product Status: The CDH53-270KC is classified as obsolete, creating supply risk and limiting availability for ongoing production. The CDH53NP-270KC maintains active product status with confirmed inventory of 860 pieces, ensuring reliable procurement.

Regulatory Compliance: The CDH53NP-270KC is ROHS3 compliant, whereas the main part is non-compliant. This compliance improvement aligns with current manufacturing standards and regulatory requirements for electronic components in most markets.

Electrical Equivalence: All critical electrical parameters—inductance, tolerance, current rating, and DC resistance—are identical between the two parts. The substitute operates across an extended temperature range (-40°C to 100°C versus -30°C to 100°C), providing additional thermal margin.

Physical Compatibility: Identical package dimensions and surface mount configuration ensure direct PCB footprint compatibility without layout modifications.

Packaging Format: The substitute is supplied in standard Tape & Reel format, which is compatible with automated assembly processes and represents current industry standard packaging practice.

Frequently Asked Questions (FAQ)

Q: Can CDH53NP-270KC be used as a direct replacement for CDH53-270KC in existing designs?

A: Yes. The CDH53NP-270KC is electrically and mechanically identical to the CDH53-270KC across all specified parameters. No circuit modifications or PCB layout changes are required. The substitute maintains the same 27 µH inductance, 720 mA current rating, 420 mOhm DC resistance, and physical dimensions.

Q: What is the difference between the two part numbers?

A: The primary differences are product status and compliance. The CDH53-270KC is obsolete and non-RoHS compliant. The CDH53NP-270KC is an active product with ROHS3 compliance. The "NP" designation in the substitute part number indicates the updated product variant. Electrical performance is identical.

Q: Does the extended operating temperature range of CDH53NP-270KC affect circuit performance?

A: No. The extended range (-40°C to 100°C versus -30°C to 100°C) represents an improvement that provides additional thermal margin. The substitute operates within the original part's temperature specification and beyond, ensuring compatibility across all intended operating conditions.

Q: Is the Tape & Reel packaging compatible with my assembly process?

A: Tape & Reel (TR) packaging is the standard format for automated surface mount assembly. If your process uses bulk or alternative packaging, coordinate with your supplier regarding packaging options. The component itself is identical regardless of packaging format.

Q: Are there any compliance or certification differences I should consider?

A: The CDH53NP-270KC is ROHS3 compliant, while the original part is non-compliant. If your application or market requires RoHS compliance, the substitute meets this requirement. Both parts carry identical ECCN (EAR99) and HTSUS classifications.

Q: What is the current inventory status for the substitute part?

A: The CDH53NP-270KC has 860 pieces in stock as new original inventory, compared to 1038 pieces for the obsolete CDH53-270KC. Availability of the active substitute is confirmed and suitable for production planning.