CDR74BNP-330LC Equivalent & Substitute Parts

Part Overview

The CDR74BNP-330LC is a 33 µH shielded ferrite core inductor manufactured by Sumida America Components Inc., rated for 970 mA continuous current with a maximum DC resistance of 180 mOhm. This surface mount component operates across the temperature range of -25°C to 80°C and is classified as obsolete. Due to its obsolete product status and limited availability relative to active alternatives, identifying equivalent substitute parts is essential for ongoing design support and production continuity.

Substiute Parts

CDR74BNP-330LC

Sumida America Components Inc.In Stock: 870CDR74BNP-330LC Datasheet

Current PartRFQ

CDRH74NP-330MC-B

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR74BNP-330LC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 33 µH (tolerance variance acceptable within design margin)
• Core material: Ferrite shielded construction
• Mounting technology: Surface mount
• Current rating: Minimum 960 mA (≥93% of original rating)
• DC resistance: Maximum 180 mOhm (lower values acceptable)
• Environmental compliance: ROHS3 certification required

Substitution Logic: The CDRH74NP-330MC-B qualifies as a direct substitute based on matching inductance value, ferrite shielded core construction, surface mount packaging, and equivalent current handling capability. The substitute maintains the same inductance specification while offering improved product status (active vs. obsolete), enhanced temperature operating range, and superior inventory availability. Tolerance and DC resistance parameters remain within acceptable engineering margins for equivalent circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CDRH74NP-330MC-B

The CDRH74NP-330MC-B is the qualified substitute for CDR74BNP-330LC based on the following engineering factors:

1. Product Status: The substitute maintains active product status with Sumida America Components Inc., ensuring long-term availability and manufacturing support compared to the obsolete main part.

2. Electrical Equivalence: Both components deliver 33 µH inductance with ferrite shielded construction. The substitute's 960 mA current rating represents 96% of the original specification, maintaining adequate margin for typical circuit applications. The improved DC resistance of 170 mOhm (versus 180 mOhm maximum) provides lower power dissipation.

3. Environmental Compliance: Both parts meet ROHS3 compliance requirements. The substitute extends the operating temperature range to -40°C to 100°C, providing broader thermal operating envelope.

4. Packaging and Logistics: The substitute is supplied in Tape & Reel format, standard for automated assembly processes, versus bulk packaging of the original part. This format supports production efficiency and inventory management.

5. Physical Compatibility: Footprint dimensions differ slightly (7.30mm x 7.30mm versus 7.80mm x 7.00mm), and the substitute offers a lower profile (4.50mm versus 4.90mm). PCB layout verification is required to confirm mechanical fit within the target application.

Frequently Asked Questions (FAQ)

Q1: Can CDRH74NP-330MC-B be used as a direct drop-in replacement for CDR74BNP-330LC?

A: Electrical substitution is valid based on matching inductance, current rating, and core material specifications. However, physical footprint dimensions differ. PCB layout review is necessary to confirm mechanical compatibility before implementation.

Q2: What is the significance of the current rating difference (970 mA vs. 960 mA)?

A: The 10 mA difference represents 1% variance from the original specification. For most circuit applications operating below maximum rated current, this difference is negligible. Design margin analysis should confirm adequate headroom for the specific application.

Q3: Why does the substitute have a wider operating temperature range?

A: The CDRH74NP-330MC-B is specified for -40°C to 100°C operation, compared to -25°C to 80°C for the original part. This reflects the active product's design envelope and does not indicate a functional change; it provides additional thermal margin for applications requiring extended temperature performance.

Q4: What does the ±20% tolerance on the substitute mean compared to ±15% on the original?

A: The substitute carries ±20% inductance tolerance versus ±15% for the original part. Both tolerances are within typical ferrite inductor specifications. Circuit designs should accommodate the wider tolerance band of the substitute through appropriate component selection or tuning provisions.

Q5: 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 manufacturing process uses manual or semi-automated placement, confirm compatibility with your assembly equipment before ordering.

Q6: Are there any compliance or certification differences between the two parts?

A: Both parts are ROHS3 compliant and carry EAR99 ECCN classification. No compliance barriers exist for substitution from a regulatory standpoint.