41221C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions Inc. 41221C is a 220 µH unshielded toroidal inductor rated for 1.03 A with a maximum DC resistance of 377mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is part of the 4100 series. The part is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

41221C

Murata Power Solutions Inc.In Stock: 78741221C Datasheet

Current PartRFQ

SH50S-1.4-220

Amgis, LLCIn Stock: 818SH50S-1.4-220 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 41221C is determined by the following critical parameters:

• Inductance Value: Must be 220 µH at 10 kHz test frequency
• Current Rating: Substitute must support minimum 1.03 A; higher ratings are acceptable
• DC Resistance: Must not exceed 377mOhm maximum
• Inductor Type: Toroidal configuration required
• Shielding: Unshielded topology maintained
• Mounting: Surface mount package required
• Temperature Range: Substitute must cover or exceed -40°C to 85°C minimum operating window

The Amgis LLC SH50S-1.4-220 meets these substitution criteria with equivalent inductance, superior current rating (1.4 A vs. 1.03 A), comparable DC resistance (380mOhm vs. 377mOhm), and extended temperature range (-40°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

The SH50S-1.4-220 from Amgis LLC is a direct functional substitute for the obsolete 41221C. The substitute maintains electrical equivalence across all critical parameters: identical 220 µH inductance, compatible DC resistance within 3mOhm, and superior current handling capability. The extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) provides additional thermal margin for demanding applications.

Both components carry RoHS compliance certifications appropriate for their respective product lifecycles. The substitute's active product status ensures ongoing availability and supply chain stability, addressing the primary limitation of the obsolete 41221C.

Physical dimensions differ slightly between the two parts (17.53mm × 16.76mm × 9.90mm for 41221C versus 17.80mm × 17.00mm × 11.45mm for SH50S-1.4-220), requiring verification of PCB layout constraints before implementation.

Frequently Asked Questions (FAQ)

Q: Can the SH50S-1.4-220 be used as a direct replacement for the 41221C in existing designs?

A: Yes, provided PCB layout accommodates the slightly larger physical dimensions. The electrical characteristics are compatible across all critical parameters: inductance, current rating, and DC resistance.

Q: What is the significance of the higher current rating (1.4 A vs. 1.03 A) on the substitute?

A: The higher current rating indicates the substitute can safely handle greater current levels without saturation. In applications where the original 41221C operates at or below 1.03 A, the substitute provides additional design margin and thermal headroom.

Q: Are there any compliance or certification differences between the two parts?

A: Both parts are RoHS compliant and REACH unaffected. The 41221C carries RoHS Compliant certification, while the SH50S-1.4-220 carries ROHS3 Compliant certification, reflecting their respective manufacturing timelines. Both are suitable for regulated applications.

Q: How do the physical dimensions affect substitution?

A: The SH50S-1.4-220 is approximately 0.09mm larger in length, 0.34mm larger in width, and 1.55mm taller than the 41221C. PCB footprint and component clearance must be verified before design implementation.

Q: What is the packaging difference between these parts?

A: The 41221C uses a nonstandard package, while the SH50S-1.4-220 is supplied in Tape & Reel (TR) format. This affects procurement and assembly processes but does not impact electrical compatibility.