NP05DB4R7M Equivalent & Substitute Parts

Part Overview

The NP05DB4R7M is a 4.7 µH shielded inductor manufactured by Taiyo Yuden, rated for 2.2 A continuous current with a maximum DC resistance of 49 mOhm. This surface mount component operates across a temperature range of -25°C to 105°C and features a self-resonant frequency of 35 MHz. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

NP05DB4R7M

Taiyo YudenIn Stock: 939NP05DB4R7M Datasheet

Current PartRFQ

SRR0603-4R7ML

Bourns Inc.In Stock: 3422SRR0603-4R7ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NP05DB4R7M is based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 4.7 µH with ±20% tolerance
• Shielded construction for electromagnetic interference mitigation
• Surface mount packaging for PCB integration
• Saturation current capability meeting or exceeding 2.2 A

Secondary Compatibility Factors:

• DC resistance within acceptable operating limits
• Operating temperature range compatibility
• Moisture sensitivity classification
• Self-resonant frequency performance characteristics

The SRR0603-4R7ML from Bourns Inc. satisfies these substitution requirements through matching inductance specification, shielded design, surface mount configuration, and saturation current rating of 2.2 A, while offering active product status and extended temperature range performance.

Parameter Comparison

Engineering Selection Recommendations

The SRR0603-4R7ML serves as a direct functional equivalent for the obsolete NP05DB4R7M based on the following engineering criteria:

Electrical Compatibility: Both components provide 4.7 µH inductance with identical ±20% tolerance specifications. The substitute part achieves saturation current of 2.2 A, matching the original part's current rating requirement. While the substitute exhibits higher DC resistance (70 mOhm versus 49 mOhm), this difference remains within acceptable operational parameters for most applications.

Thermal Performance: The SRR0603-4R7ML extends the operating temperature range to -40°C to 125°C, providing enhanced thermal margin compared to the original -25°C to 105°C specification.

Product Availability: The substitute part maintains active product status with 3,387 units in stock, ensuring long-term procurement viability and supply chain continuity.

Compliance Status: Both components carry identical REACH Unaffected and EAR99 ECCN classifications, with the substitute achieving ROHS3 compliance certification.

Physical Considerations: The substitute exhibits slightly larger footprint dimensions (6.50mm x 6.50mm versus 6.10mm x 5.90mm) and increased height (3.30mm versus 2.80mm), requiring PCB layout verification for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the SRR0603-4R7ML directly replace the NP05DB4R7M in existing designs?

A: The SRR0603-4R7ML provides electrical equivalence through matching inductance value, tolerance, and saturation current specifications. Physical footprint differences require PCB layout assessment. The higher DC resistance (70 mOhm versus 49 mOhm) introduces minimal additional power dissipation in typical applications.

Q: What is the significance of the current rating difference between the two parts?

A: The NP05DB4R7M carries a 2.2 A continuous current rating, while the SRR0603-4R7ML is rated for 1.6 A continuous current. However, the substitute's saturation current specification of 2.2 A aligns with the original part's continuous rating, providing equivalent performance in saturation-limited applications.

Q: How does the increased DC resistance of the substitute affect circuit performance?

A: The 21 mOhm increase in maximum DC resistance (from 49 mOhm to 70 mOhm) results in proportionally increased resistive losses. For a 2.2 A load, this represents approximately 0.097 W additional dissipation at maximum resistance, a consideration for thermal-sensitive applications.

Q: Are there physical installation constraints with the larger substitute part?

A: The SRR0603-4R7ML exhibits dimensions of 6.50mm x 6.50mm with 3.30mm maximum height, compared to the original 6.10mm x 5.90mm footprint with 2.80mm height. PCB layout verification is required for space-constrained designs, particularly in high-density applications.

Q: What compliance certifications apply to the substitute part?

A: The SRR0603-4R7ML maintains REACH Unaffected status and EAR99 ECCN classification consistent with the original part, while additionally achieving ROHS3 compliance certification.

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

A: The SRR0603-4R7ML operates at 45 MHz self-resonant frequency compared to the original 35 MHz specification. This 10 MHz increase provides extended high-frequency performance characteristics suitable for broadband applications.