Murata Power Solutions 43402C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 43402C is a 4 µH unshielded toroidal inductor rated for 22.4 A continuous current with a maximum DC resistance of 3.1 mOhm. Designed for surface mount applications, this component operates across the temperature range of -40°C to 125°C and is classified as obsolete. Due to its obsolete status, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

43402C

Murata Power Solutions Inc.In Stock: 119143402C Datasheet

Current PartRFQ

PL8405NL

iNRCORE, LLCIn Stock: 725PL8405NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Murata 43402C is determined by the following critical parameters:

• Inductance Value: 4 µH (exact match required)
• Current Rating: 22.4 A (minimum threshold)
• DC Resistance: Maximum allowable value for thermal and efficiency considerations
• Type and Shielding: Toroidal, unshielded configuration
• Mounting Type: Surface mount package
• Operating Temperature Range: Minimum coverage of -40°C to 125°C
• Package Dimensions: Nonstandard form factor compatibility

The iNRCORE PL8405NL meets these substitution criteria with identical inductance and current rating specifications, while maintaining compatible electrical performance within acceptable DC resistance variance.

Parameter Comparison

Engineering Selection Recommendations

The iNRCORE PL8405NL is the manufacturer-recommended substitute for the obsolete Murata 43402C. Selection of this substitute is supported by the following factors:

• Active Product Status: The PL8405NL maintains active production status, ensuring long-term availability and supply chain continuity.
• Electrical Equivalence: Identical inductance (4 µH) and current rating (22.4 A) specifications ensure functional compatibility in circuit applications.
• Enhanced Temperature Range: The PL8405NL operating range of -55°C to 130°C exceeds the original -40°C to 125°C specification, providing broader environmental coverage.
• Compliance Certifications: Both components maintain MSL 1 (Unlimited) moisture sensitivity classification and ECCN EAR99 export control status.
• RoHS3 Compliance: The PL8405NL is RoHS3 compliant, meeting current regulatory requirements for electronic component manufacturing.

Physical dimensions differ between the two components; PCB layout and mechanical clearance verification is required prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the iNRCORE PL8405NL directly replace the Murata 43402C in existing designs?

A: Electrical substitution is valid based on matching inductance and current rating. Physical dimensions differ; PCB layout compatibility must be confirmed. The PL8405NL is larger (1.280" x 1.070" vs. 1.110" x 1.000") and taller (0.510" vs. 0.390"), requiring mechanical clearance verification.

Q: What is the significance of the DC resistance difference between the two parts?

A: The PL8405NL exhibits 3.4 mOhm maximum DC resistance compared to the 43402C at 3.1 mOhm maximum. This 0.3 mOhm variance represents approximately 9.7% increase in resistance. Thermal dissipation and efficiency impact must be evaluated for high-current applications.

Q: Are there any compliance or certification differences between these components?

A: Both components share identical MSL 1 (Unlimited) and ECCN EAR99 classifications. The PL8405NL adds RoHS3 compliance certification, which the 43402C does not specify. This represents an advantage for applications subject to RoHS regulatory requirements.

Q: What is the packaging difference between these inductors?

A: The Murata 43402C is supplied in standard packaging, while the iNRCORE PL8405NL is packaged in tubes. Tube packaging is standard for surface mount inductors and does not affect component functionality or performance.

Q: Is the extended temperature range of the PL8405NL (-55°C to 130°C) a critical factor for substitution?

A: The extended range provides additional operational margin beyond the original 43402C specification (-40°C to 125°C). For applications operating within the original temperature range, this difference is not a limiting factor. For applications requiring extended temperature coverage, the PL8405NL offers enhanced capability.