Murata Power Solutions 40221C Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 40221C is a 220 µH unshielded toroidal surface mount inductor rated for 670 mA continuous current with a maximum DC resistance of 405mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. The part operates across an industrial temperature range of -40°C to 85°C and is RoHS compliant with unlimited moisture sensitivity rating.

Substiute Parts

40221C

Murata Power Solutions Inc.In Stock: 93040221C Datasheet

Current PartRFQ

PL8507NL

iNRCORE, LLCIn Stock: 1207PL8507NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 40221C is determined by the following critical parameters:

• Inductance Value: Must be 220 µH (exact match required)
• Current Rating: Substitute must meet or exceed 670 mA
• DC Resistance: Substitute DCR must not exceed 405mOhm to maintain circuit performance
• Type & Shielding: Must be toroidal and unshielded
• Mounting: Surface mount configuration required
• Temperature Range: Must support minimum -40°C to 85°C operation
• Compliance: RoHS compliance required

The iNRCORE PL8507NL meets these substitution criteria with enhanced specifications in current rating and temperature range, while maintaining the core electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

The iNRCORE PL8507NL is a qualified substitute for the obsolete Murata 40221C based on the following engineering criteria:

Electrical Compatibility: Both components maintain 220 µH inductance with surface mount toroidal unshielded configuration. The PL8507NL provides superior current handling at 820 mA versus the original 670 mA specification, offering design margin for current-limited applications.

Thermal Performance: The PL8507NL extends the operating temperature range to 130°C, exceeding the 40221C specification of 85°C maximum. This provides enhanced reliability in elevated ambient conditions.

Compliance Status: Both parts maintain RoHS compliance. The PL8507NL carries ROHS3 certification, meeting current regulatory requirements.

Physical Considerations: Dimensional differences exist between the two parts. The PL8507NL is slightly larger in length (15.88mm vs 14.22mm) and width (13.34mm vs 14.10mm) but lower in height (8.12mm vs 8.76mm). PCB layout verification is required to confirm mechanical fit.

DC Resistance Trade-off: The PL8507NL exhibits higher DC resistance at 673mOhm maximum compared to the 40221C at 405mOhm maximum. This 66% increase in DCR will result in proportionally higher resistive losses in the inductor. Circuit thermal analysis is necessary to confirm acceptable power dissipation.

Frequently Asked Questions (FAQ)

Q: Can the PL8507NL be used as a direct replacement for the 40221C?

A: Electrical substitution is valid based on inductance, current rating, and compliance requirements. However, physical layout verification is mandatory due to dimensional differences. The increased DC resistance requires thermal analysis to confirm acceptable circuit performance.

Q: What is the impact of the higher DC resistance in the PL8507NL?

A: The PL8507NL DCR of 673mOhm versus the 40221C DCR of 405mOhm results in increased resistive losses. Power dissipation will increase proportionally with circuit current. Thermal modeling of the application is required to ensure the substitute part operates within acceptable temperature limits.

Q: Are there any compliance differences between these parts?

A: Both parts are RoHS compliant. The PL8507NL carries ROHS3 certification, which represents the current regulatory standard. Both parts have unlimited moisture sensitivity rating (MSL 1) and are classified under the same ECCN category (EAR99).

Q: What are the dimensional constraints for substitution?

A: The PL8507NL is 1.66mm longer and 0.76mm narrower than the 40221C, but 0.64mm shorter in height. PCB layout must accommodate these dimensional changes. Verify clearance with adjacent components and trace routing before implementation.

Q: Does the higher current rating of the PL8507NL affect circuit design?

A: The 820 mA rating of the PL8507NL exceeds the 40221C specification of 670 mA. This provides additional design margin but does not require circuit modification. The part will operate safely at or below the original 670 mA design current.

Q: What packaging format is used for the PL8507NL?

A: The PL8507NL is supplied in tube packaging, whereas the 40221C packaging format is not specified. Verify tube packaging compatibility with your assembly and handling processes.