CDR74NP-271MC Equivalent & Substitute Parts

Part Overview

The CDR74NP-271MC is a 270 µH shielded surface mount inductor manufactured by Sumida America Components Inc. with a current rating of 310 mA and maximum DC resistance of 1.46 Ohm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. Active alternative components with comparable electrical and mechanical specifications are available from both the original manufacturer and qualified alternative suppliers.

Substiute Parts

CDR74NP-271MC

Sumida America Components Inc.In Stock: 1101CDR74NP-271MC Datasheet

Current PartRFQ

CDRH74NP-271MC-B

Sumida America Components Inc.In Stock: 1055CDRH74NP-271MC-B Datasheet

SimilarRFQ

SRR7045-271M

Bourns Inc.In Stock: 3572SRR7045-271M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR74NP-271MC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 270 µH (fixed requirement)
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Package classification: Nonstandard

Secondary Compatibility Factors:

• Current rating: Substitute must equal or exceed 310 mA
• DC resistance: Substitute must not exceed 1.46 Ohm significantly
• Inductance tolerance: ±20% or tighter
• RoHS3 compliance and MSL rating

The identified substitute parts maintain the core inductance specification and shielded surface mount configuration while offering improved current handling capability and active product status. All substitutes are RoHS3 compliant with MSL 1 rating, ensuring compatibility with standard manufacturing processes.

Parameter Comparison

Engineering Selection Recommendations

CDRH74NP-271MC-B (Sumida America Components Inc.)

This part represents the direct manufacturer evolution from the obsolete CDR74NP-271MC. It maintains identical inductance specification and shielded surface mount configuration while offering 340 mA current rating, exceeding the original 310 mA requirement. The DC resistance of 1.64 Ohm is marginally higher than the original 1.46 Ohm specification. Active product status ensures long-term availability and supply chain continuity. Operating temperature range of -40°C to 100°C covers standard industrial applications. Tape & Reel packaging supports automated assembly processes.

SRR7045-271M (Bourns Inc.)

This alternative provides superior electrical performance with 620 mA current rating and significantly lower DC resistance of 0.84 Ohm, representing a 42% reduction compared to the original specification. The drum core, wirewound construction delivers higher Q factor (30 @ 796kHz) and extended operating temperature range to 125°C. Self-resonant frequency of 5 MHz closely matches the original 4.67 MHz specification. Smaller footprint (7.00 x 7.00 mm) and lower profile (4.80 mm) provide layout advantages. Active product status and ROHS3 compliance ensure regulatory compliance and supply availability.

Both substitutes maintain RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the CDRH74NP-271MC-B directly replace the CDR74NP-271MC in existing designs?

A: The CDRH74NP-271MC-B maintains the same 270 µH inductance, shielded configuration, and surface mount package type. The 340 mA current rating exceeds the original 310 mA specification. The DC resistance increase from 1.46 Ohm to 1.64 Ohm (12% higher) must be evaluated against circuit power dissipation requirements. Physical dimensions differ slightly (7.30 x 7.30 mm versus 7.70 x 7.10 mm), requiring PCB layout verification.

Q: What are the advantages of selecting the SRR7045-271M over the CDRH74NP-271MC-B?

A: The SRR7045-271M offers substantially lower DC resistance (0.84 Ohm versus 1.64 Ohm), reducing power dissipation by approximately 73% at rated current. Current rating of 620 mA provides greater design margin. Extended operating temperature range to 125°C supports higher ambient conditions. Higher Q factor (30 @ 796kHz) indicates superior frequency response characteristics. Smaller physical footprint (7.00 x 7.00 mm) enables compact layout designs.

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

A: All three inductors use nonstandard packages with similar but not identical dimensions. The CDR74NP-271MC measures 7.70 x 7.10 mm with 4.85 mm height. The CDRH74NP-271MC-B measures 7.30 x 7.30 mm with 4.50 mm height. The SRR7045-271M measures 7.00 x 7.00 mm with 4.80 mm height. PCB footprint and clearance verification is required for each substitution.

Q: Do all substitute parts meet the same compliance requirements?

A: All three inductors are ROHS3 compliant with MSL 1 (Unlimited) rating. ECCN classification is EAR99 for all parts. HTSUS code 8504.50.4000 applies uniformly. Moisture sensitivity level 1 indicates no special storage or handling requirements beyond standard component practices.

Q: What is the impact of inductance tolerance differences?

A: The original CDR74NP-271MC specifies -15%, +20% tolerance. Both substitute parts specify ±20% tolerance. The CDRH74NP-271MC-B and SRR7045-271M provide symmetrical tolerance, which may improve circuit performance predictability in applications sensitive to inductance variation.

Q: How do the self-resonant frequency specifications compare?

A: The CDR74NP-271MC specifies 4.67 MHz self-resonant frequency. The SRR7045-271M specifies 5 MHz, representing a 7% increase. The CDRH74NP-271MC-B does not provide this specification. For applications operating near resonant frequencies, the SRR7045-271M offers closer frequency matching to the original design.