CDH74NP-331JC Equivalent & Substitute Parts

Part Overview

The CDH74NP-331JC is a 330 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 400 mA continuous current with a maximum DC resistance of 1.55 Ohm and operates across the temperature range of -40°C to 100°C. The part is classified as Active product status and is ROHS3 compliant.

Substitute parts are identified when equivalent inductance values, compatible current ratings, and matching physical package constraints are available from alternative manufacturers. The substitution process ensures functional compatibility while maintaining electrical performance within specified tolerances.

Substiute Parts

CDH74NP-331JC

Sumida America Components Inc.In Stock: 944CDH74NP-331JC Datasheet

Current PartRFQ

SDR7045-331K

Bourns Inc.In Stock: 9025SDR7045-331K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDH74NP-331JC is determined by the following criteria:

Primary Matching Parameters:

• Inductance value of 330 µH
• Ferrite drum core construction with unshielded configuration
• Surface mount technology
• Current rating equal to or greater than 400 mA
• DC resistance within acceptable operating limits
• ROHS3 compliance
• Operating temperature range compatibility

Secondary Compatibility Factors:

• Nonstandard package dimensions with physical footprint compatibility
• Moisture sensitivity level classification
• Active product status

The SDR7045-331K from Bourns Inc. meets these substitution criteria with matching inductance, equivalent core material, compatible current rating (420 mA), and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

CDH74NP-331JC Selection Criteria:

• Primary choice when inductance tolerance of ±5% is required
• Applications requiring maximum operating temperature of 100°C
• Designs with specific footprint constraints matching 8.00mm x 7.30mm dimensions
• Sumida component availability and supply chain requirements

SDR7045-331K Selection Criteria:

• Alternative when higher current rating (420 mA) provides design margin
• Applications benefiting from lower DC resistance (1.24 Ohm vs 1.55 Ohm)
• Designs tolerating ±10% inductance tolerance
• Extended operating temperature range to 125°C
• Smaller physical footprint (7.00mm x 7.00mm) when space is constrained
• Bourns component availability and supply chain requirements

Both parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance.

Frequently Asked Questions (FAQ)

Q: Can SDR7045-331K directly replace CDH74NP-331JC in all applications?

A: Direct replacement is possible when the application tolerates the following differences: inductance tolerance of ±10% instead of ±5%, lower DC resistance (1.24 Ohm vs 1.55 Ohm), and smaller physical dimensions (7.00mm x 7.00mm vs 8.00mm x 7.30mm). PCB layout modifications may be required due to footprint differences.

Q: What are the critical parameters for substitution?

A: The critical parameters are inductance value (330 µH), current rating (minimum 400 mA), ferrite drum core construction, unshielded configuration, surface mount technology, and ROHS3 compliance. Deviations in these parameters disqualify substitution.

Q: How do the DC resistance values affect circuit performance?

A: The SDR7045-331K exhibits lower DC resistance (1.24 Ohm) compared to the CDH74NP-331JC (1.55 Ohm). This results in reduced power dissipation and heat generation. Applications sensitive to inductor losses may benefit from the lower resistance value.

Q: Are there temperature range considerations for substitution?

A: The CDH74NP-331JC operates from -40°C to 100°C, while the SDR7045-331K extends to 125°C. Applications operating near the upper temperature limit of 100°C should verify that the substitute part's extended range does not introduce unintended thermal characteristics.

Q: What packaging considerations apply to these parts?

A: Both parts use nonstandard packages classified as surface mount. Physical dimensions differ: CDH74NP-331JC measures 8.00mm x 7.30mm with 5.20mm height, while SDR7045-331K measures 7.00mm x 7.00mm with 4.80mm height. PCB footprint redesign is necessary when substituting between these parts.

Q: Do both parts meet the same compliance standards?

A: Yes, both CDH74NP-331JC and SDR7045-331K are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). Both maintain Active product status, ensuring regulatory conformance and continued availability.