Murata Power Solutions 35501C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 35501C is a 500 nH unshielded wirewound surface mount inductor rated for 11.5 A continuous current with a maximum DC resistance of 7 mOhm. Designed for high-frequency applications requiring low inductance values, this component operates across the industrial temperature range of -40°C to 125°C. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing production support and design continuity.

Substiute Parts

35501C

Murata Power Solutions Inc.In Stock: 114635501C Datasheet

Current PartRFQ

744310055

Würth ElektronikIn Stock: 7864744310055 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 35501C is determined by the following critical parameters:

Inductance value must fall within the tolerance band of the original specification. The 35501C nominal value of 500 nH with ±25% tolerance establishes an acceptable range of 375 nH to 625 nH for functional equivalence.

Current rating must meet or exceed the 11.5 A requirement to ensure the substitute can handle the same load conditions without thermal stress or saturation.

DC resistance should be minimized to reduce power dissipation. The original 7 mOhm maximum specification establishes the baseline; lower DCR values improve efficiency.

Operating temperature range must encompass or exceed the -40°C to 125°C specification to maintain performance across the intended application environment.

Surface mount packaging and nonstandard case dimensions must be compatible with existing PCB layouts and assembly processes.

The Würth Elektronik 744310055 qualifies as a substitute based on these parameters: inductance of 520 nH (within tolerance band), current rating of 14 A (exceeds requirement), DC resistance of 3.7 mOhm (superior to original), operating temperature of -40°C to 150°C (exceeds range), and compatible surface mount nonstandard package dimensions.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744310055 is the qualified substitute for the obsolete Murata 35501C. Selection is based on the following engineering criteria:

The 744310055 maintains inductance within the functional tolerance band at 520 nH, representing a 4% increase from the original 500 nH specification. This variance remains within acceptable limits for most circuit applications.

Current rating of 14 A provides 22% margin above the original 11.5 A requirement, ensuring adequate headroom for transient conditions and thermal cycling.

DC resistance of 3.7 mOhm is 47% lower than the original 7 mOhm specification, resulting in reduced power dissipation and improved thermal performance.

Operating temperature range extension to 150°C provides additional margin beyond the original -40°C to 125°C specification, supporting applications with elevated ambient or self-heating conditions.

The substitute features shielding, which provides electromagnetic interference mitigation not present in the original unshielded design. This enhancement is compatible with applications requiring EMI control.

Physical dimensions of 7.00 mm × 6.90 mm × 3.30 mm are within 3% of the original footprint, permitting direct PCB layout substitution with minimal design modification.

Product status of Active ensures long-term availability and supply chain continuity, eliminating obsolescence risk associated with the original component.

Both components maintain MSL 1 moisture sensitivity classification and REACH compliance, ensuring equivalent handling and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744310055 be used as a direct replacement for the Murata 35501C?

A: Yes. The 744310055 meets all critical electrical parameters within acceptable engineering tolerances. Inductance variance of 4% is within typical circuit design margins. Physical dimensions differ by less than 3%, permitting direct PCB substitution. Verification of shielding effects on circuit performance is recommended for EMI-sensitive applications.

Q: What is the inductance tolerance impact of substitution?

A: The original 35501C specifies ±25% tolerance, establishing a range of 375 nH to 625 nH. The substitute 744310055 specifies ±20% tolerance with nominal value of 520 nH, establishing a range of 416 nH to 624 nH. The substitute tolerance band is tighter and remains within the original acceptable range.

Q: Does the shielded design of the 744310055 affect circuit compatibility?

A: Shielding reduces electromagnetic radiation and susceptibility to external interference. For circuits originally designed with an unshielded inductor, the shielded substitute may alter high-frequency behavior. Circuit validation is appropriate for applications operating above 100 MHz or in electromagnetically noisy environments.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: Dimensions differ by approximately 2% in length and width, and 3% in height. These variations are within standard PCB design tolerances for nonstandard packages. Verification of clearance to adjacent components is recommended, particularly for height-constrained assemblies.

Q: What is the current rating margin provided by the substitute?

A: The 744310055 is rated for 14 A continuous current, compared to the original 11.5 A specification. This represents a 22% margin above the original requirement, providing additional thermal headroom and transient current capacity.

Q: Are moisture sensitivity and environmental compliance equivalent?

A: Both components are classified as MSL 1 (Unlimited), indicating identical moisture sensitivity handling requirements. Both maintain REACH compliance and EAR99 export classification, ensuring equivalent regulatory and supply chain treatment.

Q: What is the DC resistance improvement of the substitute?

A: The 744310055 provides 3.7 mOhm maximum DC resistance compared to the original 7 mOhm maximum, representing a 47% reduction. Lower resistance decreases I²R power dissipation and improves thermal efficiency in high-current applications.