28224C Equivalent & Substitute Parts Reference

Part Overview

The Murata Power Solutions 28224C is a 220 µH unshielded wirewound surface mount inductor rated for 1.2 A with a maximum DC resistance of 381mOhm. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. Substitute parts must maintain the core electrical specifications while accommodating minor variations in physical dimensions and performance characteristics within acceptable engineering tolerances.

Substiute Parts

28224C

Murata Power Solutions Inc.In Stock: 101628224C Datasheet

Current PartRFQ

P0250.224NLT

Pulse ElectronicsIn Stock: 891P0250.224NLT Datasheet

MFR RecommendedRFQ

SDR1806-221KL

Bourns Inc.In Stock: 1423SDR1806-221KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 28224C is determined by the following critical parameters:

• Inductance Value: Must be 220 µH (no tolerance deviation permitted for direct substitution)
• Current Rating: Minimum 1.2 A; higher ratings are acceptable
• DC Resistance: Maximum 381mOhm; lower values are acceptable
• Shielding Configuration: Must remain unshielded to maintain circuit behavior
• Mounting Type: Must be surface mount
• Operating Temperature Range: Must encompass or exceed -40°C ~ 125°C
• Environmental Compliance: RoHS and REACH compliance required

The identified substitute parts meet these criteria while maintaining active product status or equivalent performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

P0250.224NLT (Pulse Electronics) is the primary substitute for the 28224C. This part maintains identical inductance and current rating specifications with marginally lower DC resistance (380mOhm vs. 381mOhm), representing an improvement in performance. The extended operating temperature range (-40°C ~ 130°C) provides additional thermal margin. ROHS3 compliance and active product status ensure long-term availability and supply chain stability.

SDR1806-221KL (Bourns) serves as a secondary substitute option. While the current rating is reduced to 1.1 A and DC resistance is increased to 420mOhm, both parameters remain within acceptable engineering tolerances for many applications. The drum core construction with ferrite material offers different electromagnetic characteristics. This part is actively manufactured and fully compliant with current environmental standards. Physical dimensions are slightly smaller, which may provide layout advantages in space-constrained designs.

Both substitute parts carry ROHS3 and REACH compliance certifications, ensuring regulatory alignment with current manufacturing standards. Selection between P0250.224NLT and SDR1806-221KL should be based on specific application requirements regarding current headroom, DC resistance tolerance, and physical footprint constraints.

Frequently Asked Questions (FAQ)

Q: Can the P0250.224NLT directly replace the 28224C without circuit modification?

A: Yes. The P0250.224NLT maintains the same inductance value (220 µH), current rating (1.2 A), and unshielded configuration. The lower DC resistance (380mOhm vs. 381mOhm) represents a performance improvement with no negative impact on circuit operation.

Q: What are the limitations of using SDR1806-221KL as a substitute?

A: The SDR1806-221KL has a reduced current rating (1.1 A vs. 1.2 A) and higher DC resistance (420mOhm vs. 381mOhm). Applications operating near the 1.2 A limit or with strict DC resistance requirements should use P0250.224NLT instead. The drum core construction may introduce different frequency response characteristics compared to the original wirewound design.

Q: Are there physical footprint compatibility concerns?

A: Minor dimensional variations exist. The P0250.224NLT is nearly identical (18.62 x 15.14 x 7.36mm vs. 18.50 x 15.20 x 7.60mm). The SDR1806-221KL is slightly smaller (18.30 x 14.00 x 6.90mm). PCB layout verification is recommended for designs with tight component spacing, though these differences are typically within standard manufacturing tolerances.

Q: Do substitute parts require different handling or storage procedures?

A: No. Both substitute parts maintain MSL Level 1 (Unlimited) moisture sensitivity classification, identical to the original 28224C. Standard component handling and storage procedures apply without modification.

Q: Which substitute part offers the best long-term supply availability?

A: Both P0250.224NLT and SDR1806-221KL carry active product status from established manufacturers (Pulse Electronics and Bourns), ensuring sustained availability. P0250.224NLT is recommended as the primary choice due to superior parameter matching and current rating equivalence.