Murata Power Solutions 49220C Shielded Wirewound Inductor

Part Overview

The Murata Power Solutions 49220C is a 22 µH shielded wirewound inductor rated for 3 A continuous current with a maximum DC resistance of 81mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is designed for applications requiring controlled inductance with electromagnetic shielding in compact form factors.

The 49220C maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Alternative components may be required due to inventory constraints, design optimization for specific current or temperature requirements, or application-specific performance parameters.

Substiute Parts

49220C

Murata Power Solutions Inc.In Stock: 310949220C Datasheet

Current PartRFQ

SRF1280-220M

Bourns Inc.In Stock: 1867SRF1280-220M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns SRF1280-220M qualifies as a substitute based on the following critical parameters:

Inductance Compatibility: The SRF1280-220M is a 2-coil inductor array that provides 22 µH inductance when coils are connected in parallel, matching the primary inductance specification of the 49220C.

Current Rating: The parallel configuration of the SRF1280-220M supports 4 A continuous current, exceeding the 49220C requirement of 3 A.

DC Resistance: The parallel DCR of 50.3mOhm is lower than the 49220C maximum of 81mOhm, providing improved efficiency characteristics.

Shielding: Both components feature shielded construction, maintaining electromagnetic isolation requirements.

Mounting and Packaging: Both components are surface mount with nonstandard 4-lead packages and similar physical footprints (12.50mm vs 12.00mm).

Compliance: Both components meet RoHS3 requirements and carry MSL 1 ratings.

Parameter Comparison

Engineering Selection Recommendations

The SRF1280-220M serves as a direct functional substitute for the 49220C in applications requiring 22 µH inductance at 3 A. The substitute provides measurable advantages including higher current capacity (4 A vs 3 A), lower DC resistance (50.3mOhm vs 81mOhm), and extended operating temperature range (-40°C to 125°C vs -40°C to 85°C).

Both components maintain Active product status with full RoHS3 compliance and identical moisture sensitivity ratings. The SRF1280-220M's slightly larger footprint (12.50mm vs 12.00mm) requires verification of available PCB space. The parallel coil configuration of the SRF1280-220M must be utilized to achieve the specified 22 µH inductance value.

Frequently Asked Questions (FAQ)

Q: Can the SRF1280-220M directly replace the 49220C without circuit modifications?

A: The SRF1280-220M can replace the 49220C when configured with coils connected in parallel to achieve 22 µH inductance. PCB layout must accommodate the slightly larger 12.50mm footprint. No other circuit modifications are required.

Q: What is the difference in DC resistance between these components?

A: The 49220C has a maximum DC resistance of 81mOhm, while the SRF1280-220M parallel configuration provides 50.3mOhm maximum. The lower resistance of the substitute reduces power dissipation and heat generation.

Q: Are both components suitable for the same temperature range?

A: The 49220C operates from -40°C to 85°C, while the SRF1280-220M extends to 125°C. Applications requiring operation above 85°C benefit from the SRF1280-220M's extended range. For standard -40°C to 85°C applications, both components are equivalent.

Q: What packaging considerations apply to substitution?

A: Both components use nonstandard 4-lead surface mount packages with identical 8.00mm height. The SRF1280-220M measures 12.50mm x 12.50mm compared to the 49220C at 12.00mm x 12.00mm. Verify PCB layout accommodates the 0.50mm increase in length and width.

Q: How does the coil array configuration affect substitution?

A: The SRF1280-220M contains two independent coils. For 22 µH inductance matching the 49220C, coils must be connected in parallel. This configuration also provides the 4 A current rating and 50.3mOhm DCR specifications. Series connection yields 88 µH inductance with different electrical characteristics unsuitable for this substitution.