DR73-220-R Equivalent & Substitute Parts Reference

Part Overview

The DR73-220-R is a 22 µH shielded drum core wirewound inductor manufactured by Eaton Electronics Division, designed for surface mount applications. This component is rated for 1.62 A continuous current with a DC resistance of 107 mOhm and operates across the temperature range of -40°C to 125°C. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while accommodating variations in physical dimensions, DC resistance, and current ratings that do not compromise circuit functionality.

Substiute Parts

DR73-220-R

Eaton - Electronics DivisionIn Stock: 3820DR73-220-R Datasheet

Current PartRFQ

B82472G6223M000

EPCOS - TDK ElectronicsIn Stock: 8882B82472G6223M000 Datasheet

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B82472P6223M000

EPCOS - TDK ElectronicsIn Stock: 2238B82472P6223M000 Datasheet

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P1166.223NLT

Pulse ElectronicsIn Stock: 2197P1166.223NLT Datasheet

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SLF7032T-220MR96-2PF

TDK CorporationIn Stock: 25271SLF7032T-220MR96-2PF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DR73-220-R is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 22 µH (fixed requirement)
• Inductance tolerance: ±20% (fixed requirement)
• Core type: Ferrite drum core or equivalent shielded wirewound construction
• Shielding: Shielded configuration required
• Test frequency: 100 kHz

Secondary Compatibility Parameters:

• Current rating: Minimum 1.2 A (allows lower-rated substitutes for reduced-current applications)
• DC resistance: 91 mOhm to 132 mOhm (acceptable range for equivalent performance)
• Operating temperature: Minimum -40°C to 125°C overlap required
• Mounting type: Surface mount only
• Compliance: RoHS3 compliant, MSL 1

Non-Critical Variations:

• Physical dimensions (length, width, height) may vary within surface mount constraints
• Saturation current specifications may differ
• Packaging format (Tape & Reel or Cut Tape acceptable)

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Active Status, Full Compatibility):

B82472G6223M000 and B82472P6223M000 (EPCOS - TDK Electronics) are the primary substitutes for the DR73-220-R. Both parts maintain the 22 µH inductance specification with ±20% tolerance and ferrite drum core construction. The DC resistance of 91 mOhm is lower than the original 107 mOhm, resulting in reduced power dissipation. Current ratings of 1.45 A are slightly lower than the 1.62 A specification but remain suitable for applications not requiring maximum current capacity. Both parts are Active products with RoHS3 compliance.

B82472P6223M000 offers extended operating temperature range (-55°C to 150°C) and includes AEC-Q200 automotive qualification, making it suitable for automotive and high-reliability applications.

Tier 2 - Conditional Substitutes (Active Status, Parameter Deviations):

P1166.223NLT (Pulse Electronics) maintains 22 µH inductance with ±20% tolerance and shielded wirewound construction. The current rating of 1.2 A is reduced compared to the original specification, limiting use to lower-current circuit designs. DC resistance of 126 mOhm is higher than the original, increasing power dissipation. Operating temperature range of -40°C to 130°C overlaps the original specification. This part is suitable for applications where current requirements do not exceed 1.2 A.

Tier 3 - Limited Substitutes (Not For New Designs Status):

SLF7032T-220MR96-2PF (TDK Corporation) maintains 22 µH inductance with ±20% tolerance and ferrite drum core shielded construction. However, this part carries "Not For New Designs" product status, indicating end-of-life or obsolescence trajectory. The current rating of 960 mA is significantly reduced, and the operating temperature maximum of 105°C is lower than the original specification. This part should not be selected for new circuit designs.

Frequently Asked Questions (FAQ)

Q: Can B82472G6223M000 or B82472P6223M000 be used as direct replacements for DR73-220-R?

A: Yes, both EPCOS parts are direct substitutes. They maintain identical inductance (22 µH ±20%), ferrite core material, shielded configuration, and 100 kHz test frequency. The lower DC resistance (91 mOhm vs. 107 mOhm) and slightly reduced current rating (1.45 A vs. 1.62 A) do not prevent substitution in most applications. B82472P6223M000 provides extended temperature range and AEC-Q200 qualification for automotive use.

Q: What is the impact of lower DC resistance in substitute parts?

A: Lower DC resistance reduces resistive power loss in the inductor. For the EPCOS substitutes with 91 mOhm versus the original 107 mOhm, this represents approximately 15% reduction in resistive losses. This is a beneficial characteristic that does not compromise circuit function.

Q: Can P1166.223NLT be used in all applications where DR73-220-R is specified?

A: P1166.223NLT is suitable only for applications where the circuit current does not exceed 1.2 A. The original DR73-220-R is rated for 1.62 A, so this substitute cannot be used in higher-current designs. Additionally, the higher DC resistance (126 mOhm) increases power dissipation compared to the original specification.

Q: Why is SLF7032T-220MR96-2PF marked as "Not For New Designs"?

A: The "Not For New Designs" status indicates that TDK Corporation has discontinued active development and manufacturing support for this part. While the part may remain available in inventory, it should not be selected for new circuit designs due to potential future unavailability and lack of manufacturer support.

Q: Are there physical dimension differences between substitute parts?

A: Yes. The DR73-220-R measures 7.60mm × 7.60mm × 3.55mm (max height). EPCOS parts measure 7.30mm × 7.30mm × 4.50mm (max height), Pulse Electronics measures 7.54mm × 7.54mm × 3.51mm (max height), and TDK measures 7.00mm × 7.00mm × 3.40mm (max height). These variations are within typical surface mount component tolerances and do not prevent PCB layout compatibility in most designs.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes, all listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original DR73-220-R specification.

Q: What is the temperature range consideration for substitute selection?

A: The original DR73-220-R operates from -40°C to 125°C. B82472G6223M000 extends to -55°C minimum and 125°C maximum. B82472P6223M000 extends to -55°C minimum and 150°C maximum, providing broader temperature coverage. P1166.223NLT covers -40°C to 130°C. SLF7032T-220MR96-2PF is limited to -40°C to 105°C, which may not be suitable for applications requiring the full original temperature range.