NP06DB4R7M Equivalent & Substitute Parts

Part Overview

The NP06DB4R7M is a 4.7 µH shielded inductor manufactured by Taiyo Yuden, rated for 2.5 A continuous current with a maximum DC resistance of 46 mOhm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. The part is designed for surface mount applications in nonstandard package configurations and operates across the temperature range of -25°C to 105°C.

Substiute Parts

NP06DB4R7M

Taiyo YudenIn Stock: 959NP06DB4R7M Datasheet

Current PartRFQ

7447789004

Würth ElektronikIn Stock: 129737447789004 Datasheet

SimilarRFQ

SRR0603-4R7ML

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the NP06DB4R7M are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility:

• Inductance value: 4.7 µH (fixed requirement)
• Inductance tolerance: ±20% (matching specification)
• Shielding: Shielded configuration (electromagnetic containment requirement)
• Mounting type: Surface mount (assembly process compatibility)
• Inductance test frequency: 1 kHz (measurement standard)

Mechanical Compatibility:

• Package type: Nonstandard (dimensional constraint)
• Moisture sensitivity: MSL 1 (Unlimited) or equivalent
• Environmental compliance: REACH Unaffected, EAR99 classification

Performance Considerations: Substitute parts must maintain the 4.7 µH inductance specification and shielded construction. Current rating and DC resistance values may vary within acceptable design margins, provided the substitute part does not reduce current-carrying capacity below application requirements or introduce excessive losses through elevated DCR.

Parameter Comparison

Engineering Selection Recommendations

7447789004 (Würth Elektronik WE-PD Robust Series)

This substitute provides the closest electrical performance match to the NP06DB4R7M. The part delivers superior current rating (2.9 A versus 2.5 A) and lower DC resistance (35 mOhm versus 46 mOhm), resulting in reduced thermal losses. The extended operating temperature range (-40°C to 125°C) and AEC-Q200 automotive qualification provide enhanced reliability margins. The part is currently in active production status with substantial inventory availability (12,945 pieces). Dimensional compatibility is maintained with comparable footprint and height specifications. This substitute is recommended for applications where current capacity and thermal performance are critical design factors.

SRR0603-4R7ML (Bourns Inc. SRR0603 Series)

This substitute maintains full electrical compatibility with the 4.7 µH inductance and ±20% tolerance specification. The part features a smaller footprint (6.50mm x 6.50mm) compared to the original component, which may provide layout advantages in space-constrained designs. However, the current rating (1.6 A) is reduced relative to the original specification, and DC resistance is elevated (70 mOhm maximum). This substitute is suitable only for applications where the 1.6 A current rating is sufficient and where the increased DCR does not compromise thermal or efficiency requirements. The part is in active production with good inventory availability (3,387 pieces) and includes corner terminal configuration for enhanced mechanical stability.

Both substitute parts maintain shielded construction, surface mount compatibility, and MSL 1 moisture sensitivity classification. Selection between substitutes depends on application current requirements and thermal dissipation constraints.

Frequently Asked Questions (FAQ)

Q: Can the 7447789004 be used as a direct replacement for the NP06DB4R7M?

A: The 7447789004 is electrically compatible as a substitute. Both parts share the same 4.7 µH inductance value, ±20% tolerance, shielded construction, and surface mount configuration. The 7447789004 provides improved electrical performance with higher current rating and lower DC resistance. Mechanical compatibility requires verification of PCB layout and assembly process parameters, as dimensional differences exist (7.30mm x 7.30mm versus 7.50mm x 7.30mm).

Q: What are the limitations of using the SRR0603-4R7ML as a substitute?

A: The SRR0603-4R7ML maintains inductance and tolerance specifications but has a reduced current rating of 1.6 A compared to the original 2.5 A specification. The DC resistance is also higher at 70 mOhm maximum. This substitute is appropriate only for applications where continuous current does not exceed 1.6 A and where the elevated DCR does not create unacceptable thermal or efficiency losses. The smaller package footprint (6.50mm x 6.50mm) may require PCB layout modifications.

Q: Are all substitute parts RoHS compliant?

A: The 7447789004 and SRR0603-4R7ML are both ROHS3 compliant. The original NP06DB4R7M does not specify RoHS status in the provided data. All three parts maintain REACH Unaffected status and EAR99 export classification.

Q: What is the impact of different self-resonant frequencies on circuit performance?

A: The original NP06DB4R7M has a self-resonant frequency of 33 MHz, while the 7447789004 operates at 61 MHz and the SRR0603-4R7ML at 45 MHz. Higher self-resonant frequency indicates better high-frequency performance characteristics. For applications operating below 33 MHz, all three parts are functionally equivalent. For circuits operating near or above 33 MHz, the substitute parts with higher self-resonant frequencies provide extended frequency margin.

Q: How do temperature operating ranges affect substitute selection?

A: The original NP06DB4R7M operates from -25°C to 105°C. Both substitute parts extend this range to -40°C to 125°C, providing wider environmental coverage. If the application operates within the original -25°C to 105°C range, both substitutes are compatible. For applications requiring extended temperature operation, the substitute parts provide additional thermal margin.

Q: What packaging considerations apply to these substitutes?

A: All three parts use nonstandard package configurations and surface mount assembly. The 7447789004 maintains nearly identical dimensions to the original part. The SRR0603-4R7ML uses a smaller footprint with corner terminals, which may require PCB redesign. Verify that assembly equipment and solder reflow profiles are compatible with the selected substitute's physical dimensions and terminal configuration.