N05DB4R7M Equivalent & Substitute Parts

Part Overview

The N05DB4R7M is a 4.7 µH unshielded inductor manufactured by Taiyo Yuden, rated for 2.2 A continuous current with a maximum DC resistance of 49 mOhm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. The part operates across a temperature range of -25°C to 105°C and is suitable for surface mount applications in nonstandard packaging configurations.

Substiute Parts

N05DB4R7M

Taiyo YudenIn Stock: 833N05DB4R7M Datasheet

Current PartRFQ

SDR0603-4R7ML

Bourns Inc.In Stock: 44555SDR0603-4R7ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the N05DB4R7M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 4.7 µH
• Inductance tolerance: ±20%
• Mounting type: Surface Mount
• Shielding configuration: Unshielded

Secondary Compatibility Factors:

• Current rating must equal or exceed 2.2 A
• DC resistance must not exceed 49 mOhm
• Operating temperature range must encompass or exceed -25°C to 105°C
• Moisture sensitivity level: 1 (Unlimited)

The SDR0603-4R7ML from Bourns Inc. meets the primary inductance and mounting requirements. However, the substitute part exhibits a reduced current rating of 1.8 A, which is below the original specification of 2.2 A. The DC resistance of 70 mOhm also exceeds the original maximum of 49 mOhm. These differences require engineering evaluation for specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

The SDR0603-4R7ML represents an active product alternative to the obsolete N05DB4R7M. Both components share identical inductance values and tolerance specifications, with equivalent moisture sensitivity ratings.

Compliance and Certification Status:

• Both parts are REACH Unaffected
• Both parts are classified under ECCN EAR99
• Both parts share the same HTSUS code: 8504.50.4000
• The SDR0603-4R7ML carries RoHS3 compliance certification

Operational Considerations: The SDR0603-4R7ML provides an extended operating temperature range (-40°C to 125°C) compared to the original part (-25°C to 105°C). The substitute exhibits a higher self-resonant frequency of 56 MHz versus 35 MHz in the original design.

Derating Requirements: Applications requiring the full 2.2 A current rating of the N05DB4R7M must account for the SDR0603-4R7ML's reduced current rating of 1.8 A. The increased DC resistance of 70 mOhm (versus 49 mOhm) results in higher power dissipation under equivalent current conditions.

Frequently Asked Questions (FAQ)

Q: Can the SDR0603-4R7ML directly replace the N05DB4R7M in all applications?

A: Direct replacement is limited by current rating and DC resistance differences. The substitute part is rated for 1.8 A maximum continuous current, compared to 2.2 A for the original. Applications operating at or near 2.2 A require derating analysis. The increased DC resistance of 70 mOhm (versus 49 mOhm) increases resistive losses.

Q: What are the physical dimension differences between these parts?

A: The N05DB4R7M measures 0.240" L × 0.232" W × 0.110" H (6.10mm × 5.90mm × 2.80mm). The SDR0603-4R7ML measures 0.228" L × 0.228" W × 0.154" H (5.80mm × 5.80mm × 3.90mm). Both are nonstandard package configurations. The substitute is slightly smaller in length and width but taller in seated height.

Q: Are there packaging differences between the original and substitute?

A: The N05DB4R7M packaging format is not specified in available documentation. The SDR0603-4R7ML is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount applications.

Q: How do the self-resonant frequencies compare?

A: The N05DB4R7M exhibits a self-resonant frequency of 35 MHz, while the SDR0603-4R7ML operates at 56 MHz. This difference affects high-frequency performance characteristics and impedance behavior above these frequencies.

Q: What is the saturation current specification for the substitute part?

A: The SDR0603-4R7ML has a saturation current (Isat) rating of 2.2 A, which matches the continuous current rating of the original N05DB4R7M. This parameter is not specified for the original part.

Q: Are both parts RoHS compliant?

A: The SDR0603-4R7ML carries RoHS3 compliance certification. RoHS status for the N05DB4R7M is not specified in available documentation.