Murata Power Solutions 78615/4MC Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 78615/4MC is a 67µH general purpose pulse transformer with 1CT:1CT turns ratio, designed for surface mount applications. This component features a compact footprint of 0.375" L x 0.354" W (9.52mm x 9.00mm) and operates across the 0°C to 70°C temperature range. The part carries a "Not For New Designs" status, indicating that Murata has transitioned this model out of active production. Organizations currently using this component in production systems or requiring additional inventory for ongoing support must identify suitable alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

78615/4MC

Murata Power SolutionsIn Stock: 80578615/4MC Datasheet

Current PartRFQ

78615/4JC

Murata Power Solutions Inc.In Stock: 74578615/4JC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78615/4MC is determined by strict alignment across the following critical parameters:

• Inductance tolerance: The substitute must maintain inductance within acceptable circuit operating margins. The 78615/4JC provides 65µH, representing a 2µH variance from the primary part.
• ET (Volt-Time) specification: Both parts maintain identical 4VµS ratings, ensuring equivalent energy transfer characteristics.
• Turns ratio: Both parts maintain 1CT:1CT configuration, preserving signal transformation properties.
• Physical footprint and height: Identical dimensions (0.375" L x 0.354" W, 0.250" max height) ensure PCB layout compatibility without redesign.
• Operating temperature range: Both parts support 0°C to 70°C operation, maintaining thermal compatibility.
• Compliance certifications: Both parts are ROHS3 compliant with MSL 1 rating, meeting regulatory and manufacturing requirements.

The 78615/4JC is identified as the manufacturer-recommended substitute, with active product status ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The 78615/4JC is the appropriate substitute for the 78615/4MC based on the following engineering criteria:

Product Status Alignment: The 78615/4MC carries "Not For New Designs" designation, indicating end-of-life status. The 78615/4JC maintains "Active" product status, ensuring manufacturer support, ongoing production, and supply chain availability for both immediate procurement and long-term inventory planning.

Compliance and Certification Continuity: Both parts maintain identical ROHS3 compliance and MSL 1 ratings, eliminating regulatory or manufacturing process changes during component substitution.

Electrical and Mechanical Compatibility: The inductance variance of 2µH (67µH to 65µH) occurs within the context of identical ET specifications and turns ratios. The preserved physical footprint, height, and surface mount configuration eliminate PCB redesign requirements.

Frequently Asked Questions (FAQ)

Q: What is the inductance difference between the 78615/4MC and 78615/4JC, and does it affect circuit performance?

A: The 78615/4JC provides 65µH compared to the 78615/4MC at 67µH, a 2µH variance. Both parts maintain identical 4VµS ET (Volt-Time) specifications and 1CT:1CT turns ratios. Substitution suitability depends on circuit tolerance specifications for inductance variation. The manufacturer has designated the 78615/4JC as the recommended substitute, indicating electrical compatibility within intended application parameters.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the 78615/4MC and 78615/4JC share identical dimensions: 0.375" L x 0.354" W (9.52mm x 9.00mm) with a maximum seated height of 0.250" (6.35mm). No PCB layout modifications are required for substitution.

Q: Why is the 78615/4MC marked "Not For New Designs"?

A: This designation indicates that Murata Power Solutions has transitioned the 78615/4MC out of active production. The 78615/4JC, with active product status, represents the current production equivalent and is the appropriate choice for new designs and ongoing production support.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the 78615/4MC and 78615/4JC are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings. No compliance changes occur during substitution.

Q: What is the operating temperature range for both parts?

A: Both parts operate across 0°C to 70°C, maintaining identical thermal specifications and compatibility with the same application environments.