CDH53-3R3MC Equivalent & Substitute Parts

Part Overview

The CDH53-3R3MC is a 3.3 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 1.88 A continuous current with a maximum DC resistance of 88 mOhm. The part operates across a temperature range of -30°C to 100°C and is designed for applications requiring fixed inductance in compact nonstandard packaging.

The CDH53-3R3MC carries an obsolete product status, making equivalent substitutes necessary for ongoing procurement and new designs. Identifying compatible alternatives ensures design continuity and supply chain reliability.

Substiute Parts

CDH53-3R3MC

Sumida America Components Inc.In Stock: 997CDH53-3R3MC Datasheet

Current PartRFQ

CDH53NP-3R3MC

Sumida America Components Inc.In Stock: 1151CDH53NP-3R3MC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDH53-3R3MC is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Inductance value: 3.3 µH ±20%
• Current rating: 1.88 A minimum
• DC resistance: 88 mOhm maximum
• Test frequency: 7.96 MHz

Mechanical Parameters:

• Core material: Ferrite
• Core type: Drum core, wirewound
• Shielding configuration: Unshielded
• Physical footprint: 6.00 mm × 5.20 mm × 3.20 mm maximum
• Mounting: Surface mount

Environmental Parameters:

• Operating temperature range must encompass or match the original specification

The CDH53NP-3R3MC qualifies as a direct substitute based on identical electrical and mechanical specifications across all critical parameters.

Parameter Comparison

Engineering Selection Recommendations

The CDH53NP-3R3MC is the direct equivalent substitute for the obsolete CDH53-3R3MC. Selection is based on the following engineering factors:

Electrical Equivalence: All electrical parameters—inductance, current rating, DC resistance, and test frequency—are identical between the main part and substitute. This ensures functional interchangeability in circuit applications.

Mechanical Compatibility: Physical dimensions and mounting characteristics are identical, allowing direct PCB footprint compatibility without layout modifications.

Environmental Performance: The CDH53NP-3R3MC operating temperature range (-40°C to 100°C) exceeds the original specification (-30°C to 100°C), providing enhanced thermal margin for demanding applications.

Compliance Status: The substitute part is ROHS3 compliant and carries active product status, ensuring long-term availability and regulatory alignment. The original part is RoHS non-compliant and obsolete.

Packaging Consideration: The substitute is supplied in Tape & Reel (TR) format, standard for automated assembly processes, whereas the main part was supplied in bulk. This represents an improvement for production environments but requires verification of reel specifications for your assembly equipment.

For new designs and ongoing procurement, the CDH53NP-3R3MC is the recommended selection.

Frequently Asked Questions (FAQ)

Q: Can the CDH53NP-3R3MC be used as a direct replacement for the CDH53-3R3MC in existing designs?

A: Yes. All electrical and mechanical parameters are identical. The substitute part maintains the same inductance value, current rating, DC resistance, physical footprint, and mounting configuration. No circuit modifications or PCB layout changes are required.

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

A: The CDH53-3R3MC is obsolete and supplied in bulk packaging. The CDH53NP-3R3MC is the active production equivalent, supplied in Tape & Reel format and ROHS3 compliant. The "NP" designation indicates the newer production variant with improved compliance status.

Q: Does the extended temperature range of the substitute part affect circuit performance?

A: The CDH53NP-3R3MC operates from -40°C to 100°C compared to the original -30°C to 100°C. This extended lower temperature limit provides additional thermal margin and does not negatively impact performance within the original operating range. Applications requiring operation below -30°C benefit from the expanded specification.

Q: Are there packaging implications when switching to the substitute part?

A: Yes. The CDH53NP-3R3MC is supplied in Tape & Reel (TR) format for automated assembly, whereas the original was supplied in bulk. Verify that your pick-and-place equipment supports the reel specifications. For manual assembly or low-volume applications, reel-to-bulk conversion services are available.

Q: Is the substitute part RoHS compliant?

A: Yes. The CDH53NP-3R3MC is ROHS3 compliant. The original CDH53-3R3MC is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the substitute part satisfies compliance obligations.

Q: Will inventory of the CDH53-3R3MC continue to be available?

A: The CDH53-3R3MC is obsolete. Current inventory is limited to existing stock. For ongoing procurement, transition to the CDH53NP-3R3MC is necessary to ensure supply chain continuity.

Q: Are the electrical characteristics identical at the 7.96 MHz test frequency?

A: Yes. Both parts are tested and specified at 7.96 MHz inductance test frequency. Electrical performance is identical at this reference frequency.