NP05DB100M Equivalent & Substitute Parts

Part Overview

The NP05DB100M is a 10 µH shielded inductor manufactured by Taiyo Yuden, rated for 1.6 A continuous current with a maximum DC resistance of 100 mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The part operates across a temperature range of -25°C to 105°C and is suitable for surface mount applications in compact form factors.

Substiute Parts

NP05DB100M

Taiyo YudenIn Stock: 1860NP05DB100M Datasheet

Current PartRFQ

SRR0603-100ML

Bourns Inc.In Stock: 2431SRR0603-100ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NP05DB100M is based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance value: 10 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance specification)
• Shielding type: Shielded (electromagnetic containment requirement)
• Self-resonant frequency: 25 MHz (frequency performance boundary)
• Inductance test frequency: 1 kHz (measurement standard)

Mechanical and Environmental Criteria:

• Mounting type: Surface Mount (PCB assembly compatibility)
• Moisture sensitivity level: 1 (Unlimited) (handling and storage requirements)
• Operating temperature range: Must support minimum -25°C to 105°C envelope

Regulatory and Compliance Criteria:

• REACH Status: REACH Unaffected (environmental compliance)
• ECCN: EAR99 (export classification)
• HTSUS: 8504.50.4000 (tariff classification)

The SRR0603-100ML from Bourns Inc. qualifies as a substitute based on matching inductance, tolerance, shielding, self-resonant frequency, mounting type, and regulatory classifications. Differences in current rating, DC resistance, and operating temperature range are noted for engineering evaluation.

Parameter Comparison

Engineering Selection Recommendations

The SRR0603-100ML is an active substitute for the obsolete NP05DB100M. Both components share identical inductance values, tolerance specifications, shielding characteristics, and self-resonant frequency performance. Regulatory compliance is equivalent across REACH, ECCN, and HTSUS classifications.

The SRR0603-100ML provides an extended operating temperature range (-40°C ~ 125°C versus -25°C ~ 105°C), which accommodates broader environmental conditions. The substitute part carries active product status with documented availability, eliminating obsolescence risk associated with the NP05DB100M.

Current rating differences exist: the NP05DB100M supports 1.6 A while the SRR0603-100ML is rated for 1.1 A. DC resistance increases from 100 mOhm to 120 mOhm maximum. Circuit designs operating at or above 1.1 A continuous current must evaluate thermal and power dissipation implications. Applications requiring the full 1.6 A rating require alternative sourcing strategies.

Frequently Asked Questions (FAQ)

Q: Can the SRR0603-100ML directly replace the NP05DB100M in all applications?

A: Direct substitution is valid for applications operating at or below 1.1 A continuous current. The inductance value, tolerance, shielding, and frequency characteristics are identical. Applications requiring the full 1.6 A rating of the NP05DB100M require alternative component selection or thermal analysis of the increased DC resistance.

Q: What is the impact of the 20 mOhm increase in DC resistance?

A: The SRR0603-100ML exhibits 120 mOhm maximum DC resistance compared to 100 mOhm for the NP05DB100M. This 20 mOhm difference results in increased power dissipation proportional to the square of the operating current. At 1.1 A, the power dissipation difference is approximately 24.2 mW. Circuit thermal design must account for this increase.

Q: Are there packaging or footprint compatibility concerns?

A: Both components are surface mount inductors with nonstandard packages. The NP05DB100M measures 0.240" L × 0.232" W × 0.110" H (6.10mm × 5.90mm × 2.80mm). The SRR0603-100ML measures 0.256" L × 0.256" W × 0.130" H (6.50mm × 6.50mm × 3.30mm). PCB layout verification is required to confirm footprint compatibility and clearance for the slightly larger substitute part.

Q: What is the significance of the extended temperature range in the SRR0603-100ML?

A: The SRR0603-100ML operates from -40°C to 125°C, compared to -25°C to 105°C for the NP05DB100M. This extended range provides design margin for applications subject to extreme environmental conditions or thermal cycling. The broader specification does not impose additional design constraints for applications within the original temperature envelope.

Q: Are both parts compliant with current regulatory requirements?

A: Both components carry REACH Unaffected status, EAR99 export classification, and HTSUS 8504.50.4000 tariff classification. Regulatory compliance is equivalent. The SRR0603-100ML carries RoHS3 compliance certification, providing additional environmental compliance documentation.

Q: What is the current saturation rating of the SRR0603-100ML?

A: The SRR0603-100ML specifies a saturation current (Isat) of 1.5 A. This parameter indicates the current level at which the inductor begins to exhibit nonlinear behavior due to core saturation. The NP05DB100M does not provide saturation current specification in the available data.