49221SC Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 49221SC is a 220 µH shielded wirewound inductor rated for 1.1 A continuous current with a maximum DC resistance of 380mOhm. This component is part of the 4900S series and is actively manufactured. Substitute parts are identified when equivalent inductance values, current ratings, and shielding characteristics align within acceptable electrical and mechanical tolerances for surface mount applications.

Substiute Parts

49221SC

Murata Power Solutions Inc.In Stock: 89049221SC Datasheet

Current PartRFQ

SRR1280-221K

Bourns Inc.In Stock: 1479SRR1280-221K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns SRR1280-221K qualifies as a direct substitute based on the following alignment of critical parameters:

Inductance value matches at 220 µH with tighter tolerance (±10% vs ±20%). Current rating of 1.6 A exceeds the 1.1 A requirement, providing operational margin. DC resistance of 400mOhm is within acceptable range for this inductor category. Both components feature shielded construction, surface mount configuration, and nonstandard 4-lead packages with identical seated height of 0.315" (8.00mm). Physical dimensions are comparable (12.20mm vs 12.50mm). Both maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Parameter Comparison

Engineering Selection Recommendations

Both the 49221SC and SRR1280-221K are active products with ROHS3 compliance and REACH unaffected status. The SRR1280-221K provides higher current capacity (1.6 A vs 1.1 A) and extended operating temperature range (-40°C to 125°C vs -40°C to 85°C). Selection between these components depends on circuit requirements for current headroom and thermal operating conditions. Identical package height and shielded construction ensure mechanical and electromagnetic compatibility in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the SRR1280-221K replace the 49221SC in all applications?

A: The SRR1280-221K meets or exceeds the electrical specifications of the 49221SC. Higher current rating and extended temperature range provide additional operational margin. Identical seated height and shielded construction maintain PCB compatibility.

Q: What is the difference in inductance tolerance between these parts?

A: The 49221SC has ±20% tolerance while the SRR1280-221K has ±10% tolerance. Tighter tolerance in the substitute part may benefit circuits requiring more precise inductance values.

Q: Are there physical footprint differences?

A: Both components have identical seated height of 0.315" (8.00mm). Lateral dimensions differ slightly (12.20mm vs 12.50mm), which may require PCB layout verification for space-constrained applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 49221SC and SRR1280-221K are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings.

Q: What is the DC resistance difference?

A: The 49221SC has 380mOhm maximum DC resistance while the SRR1280-221K has 400mOhm maximum. This 20mOhm difference is within acceptable range for inductor substitution in this category.