CDR74NP-330NC Equivalent & Substitute Parts

Part Overview

The CDR74NP-330NC is a 33 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 900 mA continuous current with a maximum DC resistance of 190mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1), suitable for high-frequency filtering and energy storage applications in compact form factors.

Substiute Parts

CDR74NP-330NC

Sumida America Components Inc.In Stock: 1130CDR74NP-330NC Datasheet

Current PartRFQ

CDRH74NP-330MC-B

Sumida America Components Inc.In Stock: 7079CDRH74NP-330MC-B Datasheet

SimilarRFQ

SRR7045-330M

Bourns Inc.In Stock: 2398SRR7045-330M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR74NP-330NC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 33 µH (exact match required)
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Current rating: Minimum 900 mA
• DC resistance: Lower or equal to 190mOhm preferred for thermal performance
• RoHS3 compliance and MSL 1 rating

Acceptable Variation Ranges:

• Current rating may exceed 900 mA (provides design margin)
• DC resistance lower than 190mOhm is acceptable (reduces power dissipation)
• Inductance tolerance variations within ±20% are acceptable for most applications
• Physical dimensions may vary within nonstandard package constraints

The two substitute parts listed below meet these criteria through direct electrical equivalence and functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

CDRH74NP-330MC-B (Sumida America Components Inc.)

This substitute is the primary equivalent option. It maintains the same manufacturer lineage (Sumida) and shares identical inductance specifications. The CDRH74NP-330MC-B offers improved DC resistance (170mOhm vs. 190mOhm), resulting in lower power dissipation. Current rating is marginally higher at 960 mA, providing adequate headroom above the 900 mA requirement. The part is active in production with substantial inventory availability (6983 units). Operating temperature range is -40°C to 100°C. Tape & Reel packaging is standard for production environments. Physical dimensions are comparable within nonstandard package tolerances.

SRR7045-330M (Bourns Inc.)

This substitute provides superior electrical performance characteristics. The SRR7045-330M delivers significantly lower DC resistance (115mOhm vs. 190mOhm), substantially reducing thermal losses. Current rating of 1.6 A provides substantial design margin. The part features a wider operating temperature range (-40°C to 125°C) and is actively produced by Bourns with 2300 units in stock. Physical dimensions are slightly smaller (7.00mm x 7.00mm footprint). This option is suitable for applications requiring enhanced thermal performance or extended temperature operation.

Both substitutes are RoHS3 compliant with MSL 1 rating, matching the original part's environmental specifications. Selection between these options depends on thermal budget requirements and temperature operating range constraints.

Frequently Asked Questions (FAQ)

Q: Can CDRH74NP-330MC-B be used as a direct replacement for CDR74NP-330NC?

A: Yes. Both parts share 33 µH inductance, shielded configuration, and surface mount technology. The CDRH74NP-330MC-B has lower DC resistance (170mOhm vs. 190mOhm) and higher current rating (960 mA vs. 900 mA), making it functionally equivalent with improved performance margins. Physical dimensions are comparable within nonstandard package specifications.

Q: What are the advantages of SRR7045-330M over CDRH74NP-330MC-B?

A: The SRR7045-330M offers lower DC resistance (115mOhm vs. 170mOhm), reducing power dissipation by approximately 32%. It provides higher current rating (1.6 A vs. 960 mA) and extended operating temperature range (-40°C to 125°C vs. -40°C to 100°C). These characteristics make it suitable for high-current or thermally constrained applications.

Q: Are there physical compatibility concerns when substituting these parts?

A: All three parts use nonstandard packages with comparable dimensions. CDR74NP-330NC measures 7.70mm x 7.10mm x 4.85mm. CDRH74NP-330MC-B measures 7.30mm x 7.30mm x 4.50mm. SRR7045-330M measures 7.00mm x 7.00mm x 4.80mm. Footprint variations are within typical nonstandard package tolerances. PCB layout verification is recommended for space-constrained designs.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. Both CDRH74NP-330MC-B and SRR7045-330M are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, matching the original CDR74NP-330NC specifications.

Q: What is the inductance tolerance for substitute parts?

A: CDRH74NP-330MC-B and SRR7045-330M both specify ±20% inductance tolerance, compared to the original part's -15%, +25% tolerance. This tighter tolerance range is acceptable for most applications and provides improved consistency.

Q: Which substitute offers the best thermal performance?

A: SRR7045-330M provides the lowest DC resistance at 115mOhm maximum, resulting in the lowest power dissipation and thermal generation at rated current levels.

Q: Are substitute parts available in Tape & Reel packaging?

A: Yes. Both CDRH74NP-330MC-B and SRR7045-330M are supplied in Tape & Reel (TR) packaging, standard for automated assembly and production environments.