NP06DB681M Equivalent & Substitute Parts

Part Overview

The NP06DB681M is a 680 µH shielded surface mount inductor manufactured by Taiyo Yuden, rated for 210 mA maximum current with 4.6Ohm DC resistance. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing production support and design continuity. The part operates across a temperature range of -25°C to 105°C and is suitable for applications requiring shielded inductance in compact surface mount packages.

Substiute Parts

NP06DB681M

Taiyo YudenIn Stock: 796NP06DB681M Datasheet

Current PartRFQ

SLF7032T-681MR16-2PF

TDK CorporationIn Stock: 4469SLF7032T-681MR16-2PF Datasheet

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SRR0603-681KL

Bourns Inc.In Stock: 1611SRR0603-681KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NP06DB681M is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Electrical Parameters:

• Inductance value: 680 µH (fixed requirement)
• Inductance tolerance: ±20% (acceptable range)
• Shielding: Shielded (electromagnetic containment requirement)
• Current rating: Minimum 210 mA (load capacity requirement)
• DC resistance: Lower values preferred to minimize losses
• Operating temperature range: Minimum -25°C to 105°C coverage

Mechanical Parameters:

• Mounting type: Surface Mount (PCB assembly compatibility)
• Package classification: Nonstandard (7.50mm x 7.30mm footprint)
• Height constraint: Maximum 0.126" (3.20mm) seated height
• Moisture sensitivity: MSL 1 (unlimited shelf life)

The identified substitute parts meet the core inductance and current rating specifications while maintaining shielded construction and surface mount compatibility. Variations in DC resistance, temperature range extensions, and tolerance specifications are noted as secondary differentiators.

Parameter Comparison

Engineering Selection Recommendations

SLF7032T-681MR16-2PF (TDK Corporation): This substitute provides 680 µH inductance with lower DC resistance (3.78Ohm) compared to the original part. Current rating of 160 mA is below the original 210 mA specification. Product status is "Not For New Designs," indicating limited long-term availability. ROHS3 compliance and extended temperature range (-40°C to 105°C) are provided. Physical dimensions are slightly smaller (7.00mm x 7.00mm), and seated height is marginally taller (3.40mm). Selection of this part requires confirmation that 160 mA current capacity is sufficient for the application.

SRR0603-681KL (Bourns Inc.): This substitute provides 680 µH inductance with tighter tolerance (±10% versus ±20%), improving inductance accuracy. Current rating of 120 mA is significantly below the original 210 mA specification. DC resistance is higher at 10.5Ohm maximum. Product status is "Active," ensuring ongoing availability and support. ROHS3 compliance and extended temperature range (-40°C to 125°C) are provided. Physical dimensions are smaller (6.50mm x 6.50mm) with comparable seated height (3.30mm). Selection of this part requires confirmation that 120 mA current capacity is sufficient for the application.

Frequently Asked Questions (FAQ)

Q: Can the SLF7032T-681MR16-2PF directly replace the NP06DB681M?

A: The SLF7032T-681MR16-2PF maintains the same 680 µH inductance and shielded construction. However, the current rating is reduced from 210 mA to 160 mA. Direct replacement is possible only if the application current requirement does not exceed 160 mA. The lower DC resistance (3.78Ohm versus 4.6Ohm) provides improved efficiency characteristics.

Q: Can the SRR0603-681KL directly replace the NP06DB681M?

A: The SRR0603-681KL maintains the same 680 µH inductance and shielded construction. However, the current rating is reduced from 210 mA to 120 mA. Direct replacement is possible only if the application current requirement does not exceed 120 mA. The tighter inductance tolerance (±10%) and active product status provide advantages for new designs.

Q: What are the physical compatibility considerations?

A: All three parts are surface mount inductors with nonstandard packages. The NP06DB681M footprint is 7.50mm x 7.30mm with 3.20mm maximum height. The SLF7032T-681MR16-2PF is 7.00mm x 7.00mm with 3.40mm height. The SRR0603-681KL is 6.50mm x 6.50mm with 3.30mm height. Smaller substitute parts may fit existing PCB layouts, but verification of pad spacing and clearance is required.

Q: How do DC resistance differences affect circuit performance?

A: The NP06DB681M has 4.6Ohm maximum DCR. The SLF7032T-681MR16-2PF has 3.78Ohm maximum DCR, resulting in lower power dissipation. The SRR0603-681KL has 10.5Ohm maximum DCR, resulting in higher power dissipation. Selection depends on thermal budget and efficiency requirements of the application.

Q: What is the significance of product status classifications?

A: The NP06DB681M is classified as "Obsolete," indicating discontinued manufacturing. The SLF7032T-681MR16-2PF is "Not For New Designs," indicating limited future availability. The SRR0603-681KL is "Active," indicating current production and long-term availability. For new designs, the SRR0603-681KL is the preferred choice if current rating requirements are met.

Q: Are all substitute parts RoHS compliant?

A: The SLF7032T-681MR16-2PF and SRR0603-681KL are both ROHS3 compliant. RoHS status for the original NP06DB681M is not specified in the provided data.

Q: What temperature range considerations apply?

A: The NP06DB681M operates from -25°C to 105°C. The SLF7032T-681MR16-2PF extends the lower limit to -40°C while maintaining 105°C upper limit. The SRR0603-681KL extends both limits to -40°C to 125°C. Selection depends on application temperature requirements.