NP06DB220M Equivalent & Substitute Parts

Part Overview

The NP06DB220M is a 22 µH shielded inductor manufactured by Taiyo Yuden, rated for 1.1 A maximum current with 170 mOhm DC resistance. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -25°C to 105°C and features surface mount packaging in a nonstandard form factor measuring 7.50mm × 7.30mm × 3.20mm (max height).

Due to its obsolete status, equivalent substitute inductors with matching electrical specifications and compatible mechanical dimensions are required to maintain design functionality and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Inductance	22	µH
Inductance Tolerance	±20%	%
Current Rating	1.1	A
DC Resistance (DCR)	170	mOhm Max
Shielding	Shielded	—
Frequency - Self Resonant	13	MHz
Operating Temperature Range	-25°C to 105°C	°C
Mounting Type	Surface Mount	—
Package Dimensions (L × W × H)	7.50 × 7.30 × 3.20	mm
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the NP06DB220M are selected based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

Primary Matching Criteria:

Inductance value: 22 µH (fixed requirement)
Inductance tolerance: ±20% (matching specification)
Shielding type: Shielded (electromagnetic containment requirement)
Mounting type: Surface Mount (assembly compatibility)
Inductance test frequency: 1 kHz (measurement standard)

Secondary Compatibility Criteria:

Current rating: Equal to or greater than 1.1 A
DC resistance: Lower or equal to 170 mOhm (thermal and efficiency consideration)
Self-resonant frequency: Greater than or equal to 13 MHz (frequency response requirement)
Operating temperature range: Must encompass or exceed -25°C to 105°C
Moisture sensitivity: MSL 1 (Unlimited) or equivalent
REACH and ECCN compliance: REACH Unaffected and EAR99 classification

Mechanical Compatibility:

Package form factor: Nonstandard surface mount with compatible footprint dimensions
Height constraint: Maximum seated height must not exceed application space limitations

The identified substitute parts meet these criteria while offering improved or equivalent performance characteristics and active product status for long-term availability.

Parameter Comparison

Parameter	NP06DB220M (Taiyo Yuden)	7447779122 (Würth Elektronik)	SRR0603-220ML (Bourns Inc.)
Inductance	22 µH	22 µH	22 µH
Inductance Tolerance	±20%	±20%	±20%
Current Rating	1.1 A	1.41 A	700 mA
DC Resistance (DCR)	170 mOhm Max	110 mOhm Max	270 mOhm Max
Shielding	Shielded	Shielded	Shielded
Self-Resonant Frequency	13 MHz	17 MHz	20 MHz
Operating Temperature Range	-25°C to 105°C	-40°C to 125°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Dimensions (L × W × H)	7.50 × 7.30 × 3.20 mm	7.30 × 7.30 × 4.50 mm	6.50 × 6.50 × 3.30 mm
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN Classification	EAR99	EAR99	EAR99
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

7447779122 (Würth Elektronik WE-PD Robust Series)

This substitute provides superior electrical performance with 1.41 A current rating (28% higher than the original specification) and reduced DC resistance of 110 mOhm (35% lower than the original). The part features AEC-Q200 automotive qualification and extended operating temperature range (-40°C to 125°C). Active product status ensures long-term availability. The increased self-resonant frequency of 17 MHz provides improved high-frequency performance. Mechanical dimensions are comparable with 7.30mm × 7.30mm footprint and 4.50mm maximum height. RoHS3 compliance is confirmed.

SRR0603-220ML (Bourns Inc. SRR0603 Series)

This substitute offers the smallest footprint at 6.50mm × 6.50mm with 3.30mm maximum height, providing space optimization benefits. The part maintains active product status with extended operating temperature range (-40°C to 125°C) and RoHS3 compliance. However, the current rating of 700 mA is below the original 1.1 A specification, and DC resistance of 270 mOhm exceeds the original 170 mOhm maximum. This substitute is suitable only for applications where current requirements do not exceed 700 mA. The higher self-resonant frequency of 20 MHz and documented Q factor of 16 @ 2.52MHz provide additional performance data.

Selection Basis:

For applications requiring full electrical compatibility with the original NP06DB220M specification, the 7447779122 is the primary substitute, offering improved performance margins and active product status. The SRR0603-220ML is applicable only when current requirements are confirmed below 700 mA and thermal dissipation from higher DC resistance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 7447779122 directly replace the NP06DB220M in all applications?

A: The 7447779122 meets or exceeds all electrical specifications of the NP06DB220M. The primary consideration is mechanical fit: the 7447779122 has a maximum height of 4.50mm compared to the original 3.20mm. Verify available PCB clearance before substitution. Footprint dimensions are comparable (7.30mm × 7.30mm versus 7.50mm × 7.30mm).

Q: Is the SRR0603-220ML suitable as a substitute for the NP06DB220M?

A: The SRR0603-220ML is suitable only for applications where the maximum current requirement does not exceed 700 mA. The original part is rated for 1.1 A. Additionally, the DC resistance of 270 mOhm is 59% higher than the original 170 mOhm specification, resulting in increased power dissipation. The smaller footprint (6.50mm × 6.50mm) may provide space benefits in constrained layouts.

Q: What are the key differences in operating temperature ranges?

A: The original NP06DB220M operates from -25°C to 105°C. Both substitute parts extend this range to -40°C to 125°C, providing improved performance in extreme temperature environments. Applications operating within the original temperature window will function identically with either substitute.

Q: Are there compliance or regulatory differences between the three parts?

A: All three parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99). The 7447779122 includes AEC-Q200 automotive qualification. Both substitute parts carry RoHS3 compliance, while the original NP06DB220M does not specify RoHS status. All parts maintain MSL 1 (Unlimited) moisture sensitivity level.

Q: How do the self-resonant frequencies compare?

A: The original NP06DB220M has a self-resonant frequency of 13 MHz. The 7447779122 operates at 17 MHz, and the SRR0603-220ML at 20 MHz. Higher self-resonant frequencies indicate improved high-frequency performance and reduced parasitic effects at elevated frequencies.

Q: What is the impact of different DC resistance values?

A: DC resistance directly affects power dissipation and thermal performance. The 7447779122 at 110 mOhm provides 35% lower dissipation than the original 170 mOhm specification. The SRR0603-220ML at 270 mOhm results in 59% higher dissipation. For applications with continuous current operation, the 7447779122 offers thermal advantages, while the SRR0603-220ML requires thermal analysis to confirm acceptable operating conditions.

Q: Are there packaging or assembly considerations?

A: All three parts are surface mount components with nonstandard form factors. The 7447779122 uses Würth Elektronik's 7345 supplier device package designation. The SRR0603-220ML is supplied in Tape & Reel (TR) packaging with corner terminals. Verify PCB design compatibility with corner terminal configuration if selecting the SRR0603-220ML.

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