Equivalent & Substitute Parts for Murata Power Solutions 28222C

Part Overview

The Murata Power Solutions 28222C is a 2.2 µH unshielded wirewound inductor rated for 11.2 A continuous current with a maximum DC resistance of 4.4 mOhm. This surface mount component operates across the -40°C to 125°C temperature range and is part of the 2800 series. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

28222C

Murata Power Solutions Inc.In Stock: 76628222C Datasheet

Current PartRFQ

SC4020FH-2R2

Signal TransformerIn Stock: 792SC4020FH-2R2 Datasheet

MFR RecommendedRFQ

SDR1806-2R2ML

Bourns Inc.In Stock: 2085SDR1806-2R2ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 28222C are selected based on the following critical parameters that determine functional equivalence:

• Inductance Value: Must be 2.2 µH to maintain circuit performance
• Current Rating: Minimum 9 A required; the original part supports 11.2 A
• DC Resistance: Maximum 7.5 mOhm acceptable; original specification is 4.4 mOhm
• Shielding Configuration: Unshielded only
• Mounting Type: Surface mount required
• Operating Temperature Range: Must support -40°C to 125°C minimum
• Environmental Compliance: RoHS and REACH compliance required

The two identified substitutes meet these core electrical and mechanical criteria while maintaining active product status and current availability.

Parameter Comparison

Engineering Selection Recommendations

SC4020FH-2R2 (Signal Transformer): This substitute maintains the closest electrical performance to the original 28222C, with 11 A current rating and 7.5 mOhm DCR. The part is actively manufactured and carries ROHS3 compliance. The inductance tolerance of ±30% and saturation current of 10.2 A are within acceptable ranges for most applications requiring the original specification.

SDR1806-2R2ML (Bourns): This alternative features a ferrite drum core construction with 9 A current rating and 6.8 mOhm DCR. The part is actively produced with ROHS3 compliance and offers superior saturation characteristics (22 A Isat). The ±20% inductance tolerance provides tighter control than the Signal Transformer option. This substitute is suitable for applications where the 9 A current rating is sufficient and where the ferrite core construction is compatible with the circuit design.

Both substitutes maintain full compliance with environmental regulations and offer unlimited moisture sensitivity ratings, matching the original part's reliability profile.

Frequently Asked Questions (FAQ)

Q: Can the SC4020FH-2R2 directly replace the 28222C in all applications?

A: The SC4020FH-2R2 is electrically compatible for applications requiring up to 11 A continuous current. The higher DCR (7.5 mOhm vs. 4.4 mOhm) will result in increased power dissipation. Physical dimensions differ slightly (19.50mm x 13.30mm x 6.90mm vs. 18.50mm x 15.20mm x 7.60mm), requiring PCB layout verification.

Q: What is the primary limitation of the SDR1806-2R2ML substitute?

A: The SDR1806-2R2ML has a lower current rating of 9 A compared to the original 11.2 A specification. This substitute is appropriate only for applications where the maximum continuous current does not exceed 9 A. The ferrite drum core construction differs from the original wirewound design and may exhibit different frequency response characteristics.

Q: Are both substitutes available in the same packaging format?

A: Both substitutes are supplied in Tape & Reel (TR) packaging, suitable for automated assembly. Physical footprints differ slightly from the original nonstandard package, requiring PCB design verification before implementation.

Q: Do the substitute parts maintain the same environmental compliance as the 28222C?

A: Yes. Both SC4020FH-2R2 and SDR1806-2R2ML are ROHS3 compliant and REACH unaffected, meeting or exceeding the original part's environmental standards. Both maintain MSL 1 (Unlimited) moisture sensitivity ratings.

Q: How do the Q-factor specifications compare?

A: The original 28222C specifies Q of 36.9 @ 1 MHz. The SC4020FH-2R2 does not provide Q specifications. The SDR1806-2R2ML specifies Q of 22 @ 7.96 MHz, indicating different frequency response characteristics due to the ferrite core construction.