Murata Power Solutions 28335C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 28335C is a 3.3 mH unshielded wirewound surface mount inductor rated for 290 mA with a maximum DC resistance of 5.76 Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 125°C and is suitable for applications requiring fixed inductance in compact surface mount packages.

Substiute Parts

28335C

Murata Power Solutions Inc.In Stock: 117328335C Datasheet

Current PartRFQ

IHSM7832ER332L

Vishay DaleIn Stock: 787IHSM7832ER332L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 28335C is determined by the following critical parameters:

• Inductance Value: 3.3 mH (primary functional requirement)
• Current Rating: Minimum 270 mA acceptable; original part rated 290 mA
• DC Resistance: Maximum 7.09 Ohm acceptable; original part 5.76 Ohm maximum
• Shielding Configuration: Unshielded (must match)
• Mounting Type: Surface Mount (must match)
• Operating Temperature Range: Minimum -40°C to 125°C (original specification)
• Package Type: Nonstandard surface mount package

The Vishay Dale IHSM7832ER332L qualifies as a substitute based on matching inductance value, unshielded configuration, surface mount mounting type, and compatible operating temperature range. The current rating of 270 mA is within acceptable tolerance for most applications, and the DC resistance of 7.09 Ohm remains within functional limits for inductor substitution.

Parameter Comparison

Engineering Selection Recommendations

The Vishay Dale IHSM7832ER332L is an active product suitable for replacing the obsolete Murata 28335C. Both components share identical inductance values and unshielded surface mount configurations. The substitute part maintains REACH compliance and EAR99 export classification consistent with the original component. The extended operating temperature range of the substitute (-55°C to 125°C) provides additional thermal margin beyond the original specification. Current rating reduction from 290 mA to 270 mA requires circuit-level verification to confirm compatibility with application requirements. DC resistance increase from 5.76 Ohm to 7.09 Ohm introduces additional power dissipation that must be evaluated within the thermal and performance constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale IHSM7832ER332L directly replace the Murata 28335C without circuit modification?

A: Direct replacement is possible if the application current requirement does not exceed 270 mA and the increased DC resistance of 7.09 Ohm (versus 5.76 Ohm) does not violate thermal or performance specifications. Circuit-level analysis is required to confirm compatibility.

Q: What is the impact of the 20 mA current rating reduction?

A: Applications operating at or near 290 mA must be re-evaluated. The substitute part is rated for 270 mA maximum. Exceeding this rating may result in inductor saturation or thermal stress.

Q: How does the increased DC resistance affect circuit performance?

A: The 1.33 Ohm increase in DC resistance results in higher power dissipation at rated current. For a 290 mA circuit, this represents approximately 0.24 mW additional dissipation. Applications sensitive to resistive losses require thermal and efficiency analysis.

Q: Are the physical dimensions compatible?

A: Both components use nonstandard surface mount packages. The Murata 28335C measures 18.50mm × 15.20mm × 7.60mm (height), while the Vishay Dale IHSM7832ER332L measures 21.34mm × 8.13mm × 7.24mm (height). PCB layout verification is necessary to confirm mechanical fit.

Q: What compliance certifications apply to both parts?

A: Both components are REACH Unaffected and classified as EAR99 for export control purposes. Moisture sensitivity level is 1 (Unlimited) for both parts, indicating no special moisture handling requirements during storage or assembly.