NP05DB101M Equivalent & Substitute Parts

Part Overview

The NP05DB101M is a 100 µH shielded surface mount inductor manufactured by Taiyo Yuden, rated for 550 mA continuous current with a maximum DC resistance of 830mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -25°C to 105°C and is suitable for applications requiring shielded inductive filtering in compact form factors.

Substiute Parts

NP05DB101M

Taiyo YudenIn Stock: 726NP05DB101M Datasheet

Current PartRFQ

SRR0603-101KL

Bourns Inc.In Stock: 2124SRR0603-101KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NP05DB101M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 100 µH (exact match required)
• Shielding requirement: Shielded construction
• Mounting technology: Surface mount
• Functional current handling capability

Secondary Compatibility Factors:

• DC resistance within acceptable operating limits
• Self-resonant frequency suitable for application bandwidth
• Operating temperature range compatibility
• Tolerance specification alignment
• Physical footprint accommodation in PCB layout

The SRR0603-101KL from Bourns Inc. matches the primary inductance specification and shielding requirement. However, substitution feasibility depends on application-specific current requirements and thermal management constraints, as the substitute part carries a lower current rating of 300 mA compared to the original 550 mA specification.

Parameter Comparison

Engineering Selection Recommendations

NP05DB101M (Original - Obsolete): The original part is classified as obsolete and no longer in active production. While 688 units remain in stock, long-term procurement is not viable. This part should be considered end-of-life for new designs.

SRR0603-101KL (Active Substitute): The SRR0603-101KL is an active product from Bourns Inc. with 2077 units in stock. This part maintains the 100 µH inductance specification and shielded construction required for functional equivalence. The substitute carries ROHS3 compliance certification, providing regulatory advantage over the obsolete original part.

Critical Substitution Constraint: The SRR0603-101KL current rating of 300 mA is substantially lower than the NP05DB101M rating of 550 mA. Substitution is only valid for applications where the actual operating current does not exceed 300 mA. Applications requiring the full 550 mA capability cannot use this substitute without thermal and reliability risk.

Physical Footprint Consideration: The substitute part is marginally larger (0.256" x 0.256" vs. 0.240" x 0.232") and taller (0.130" vs. 0.110" seated height). PCB layout verification is required to confirm accommodation within existing design constraints.

Compliance Status: Both parts maintain REACH Unaffected and EAR99 ECCN classifications. The substitute provides superior temperature range coverage (-40°C to 125°C vs. -25°C to 105°C) and improved inductance tolerance (±10% vs. ±20%).

Frequently Asked Questions (FAQ)

Q: Can the SRR0603-101KL directly replace the NP05DB101M in all applications?

A: Direct replacement is valid only for applications where the operating current does not exceed 300 mA. The substitute part has a maximum current rating of 300 mA, compared to the original 550 mA specification. Applications operating at higher currents require alternative solutions or thermal management redesign.

Q: What are the physical compatibility considerations?

A: The SRR0603-101KL is slightly larger in footprint (6.50mm x 6.50mm vs. 6.10mm x 5.90mm) and taller (3.30mm vs. 2.80mm seated height). PCB layout must be verified to confirm the substitute fits within available space. Corner terminal configuration on the substitute may also affect trace routing.

Q: How do the DC resistance values compare?

A: The original NP05DB101M specifies 830mOhm maximum DC resistance, while the SRR0603-101KL specifies 1.5Ohm maximum. The substitute exhibits approximately 1.8 times higher DC resistance. Applications sensitive to resistive losses or thermal dissipation must evaluate this parameter against design requirements.

Q: Are there compliance or regulatory differences?

A: Both parts maintain REACH Unaffected and EAR99 ECCN classifications. The substitute carries ROHS3 compliance certification, providing regulatory advantage. The original part's compliance status is not specified in available documentation.

Q: What is the inductance tolerance difference impact?

A: The original part specifies ±20% tolerance, while the substitute specifies ±10% tolerance. The substitute provides tighter inductance control, which may improve circuit performance in applications sensitive to inductance variation.

Q: Can the substitute handle the full operating temperature range of the original?

A: The substitute actually exceeds the original temperature range. The SRR0603-101KL operates from -40°C to 125°C, compared to the NP05DB101M range of -25°C to 105°C. Both parts maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q: What is the saturation current of the substitute?

A: The SRR0603-101KL specifies a saturation current (Isat) of 440 mA. This parameter is not provided for the original NP05DB101M. The saturation current represents the point at which inductance begins to degrade under current stress.