Murata Power Solutions 28155C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 28155C is a 1.5 mH unshielded wirewound surface mount inductor rated for 410 mA with a maximum DC resistance of 2.62 Ohm. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. Substitute parts must maintain the specified inductance value, current rating, and operating temperature range while accommodating variations in shielding configuration and package dimensions.

Substiute Parts

28155C

Murata Power Solutions Inc.In Stock: 83228155C Datasheet

Current PartRFQ

NS12555T152MN

Taiyo YudenIn Stock: 2326NS12555T152MN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 28155C is determined by the following critical parameters:

• Inductance Value: Must be 1.5 mH to maintain circuit performance
• Current Rating: Substitute must support minimum 410 mA; higher ratings are acceptable
• DC Resistance: Lower DCR values are acceptable; higher values may impact efficiency
• Operating Temperature Range: Must encompass -40°C ~ 125°C
• Mounting Type: Surface mount configuration required
• RoHS Compliance: Preferred for regulatory alignment

The Taiyo Yuden NS12555T152MN qualifies as a substitute based on matching inductance, exceeding current rating capability (440 mA), maintaining compatible operating temperature range, and providing RoHS3 compliance. Differences in shielding configuration (shielded vs. unshielded) and package dimensions represent acceptable trade-offs when circuit layout permits.

Parameter Comparison

Engineering Selection Recommendations

The NS12555T152MN from Taiyo Yuden serves as the primary substitute for the obsolete 28155C. Selection is justified on the following basis:

• Electrical Equivalence: Identical inductance value and operating temperature range ensure functional compatibility
• Current Margin: 440 mA rating exceeds the 410 mA requirement, providing operational headroom
• Resistance Improvement: Lower DCR (2.076 Ohm vs. 2.62 Ohm) reduces power dissipation
• Regulatory Compliance: ROHS3 certification meets current environmental standards
• Availability: 2237 units in stock provide supply continuity

The transition from unshielded to shielded configuration requires circuit layout verification to confirm electromagnetic compatibility with adjacent components. The reduced package footprint (12.50mm x 12.50mm vs. 18.50mm x 15.20mm) may enable PCB space optimization.

Frequently Asked Questions (FAQ)

Q: Can the NS12555T152MN directly replace the 28155C without circuit modification?

A: Electrical parameters are compatible. The shielded configuration of the NS12555T152MN may alter electromagnetic coupling characteristics in the circuit. Verification through functional testing is necessary if the original design relied on specific unshielded inductor behavior.

Q: What is the impact of the lower DC resistance in the substitute part?

A: The NS12555T152MN exhibits 2.076 Ohm maximum DCR compared to 2.62 Ohm in the 28155C. This reduction decreases resistive losses and heat generation, generally improving circuit efficiency. No negative impact is anticipated.

Q: Are there package dimension constraints for the NS12555T152MN?

A: The substitute part is physically smaller (12.50mm x 12.50mm vs. 18.50mm x 15.20mm footprint). PCB layout must accommodate this reduced size. The lower profile (5.85mm vs. 7.60mm height) may provide clearance advantages in space-constrained applications.

Q: Does the shielded design of the substitute affect circuit performance?

A: Shielding reduces radiated electromagnetic interference and susceptibility to external fields. In applications where the original unshielded design was intentional, shielding may alter coupling characteristics. Circuit-level validation is recommended for sensitive analog or RF applications.

Q: What is the significance of the "Not For New Designs" status of the NS12555T152MN?

A: This designation indicates the part is available for existing production but not recommended for new product development. For legacy system support and production continuity, the part remains suitable. Long-term availability should be confirmed with the supplier.