Murata Power Solutions 78615/1MC Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 78615/1MC is a 2mH 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 a 0°C to 70°C temperature range. The part carries a "Not For New Designs" status, indicating it has been superseded in Murata's product portfolio. Organizations currently using this component in active designs require qualified substitute parts that maintain electrical and mechanical compatibility while transitioning to actively supported alternatives.

Substiute Parts

78615/1MC

Murata Power Solutions Inc.In Stock: 81478615/1MC Datasheet

Current PartRFQ

78615/1JC

Murata Power Solutions Inc.In Stock: 115778615/1JC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 78615/1MC pulse transformer can be substituted with the Murata Power Solutions 78615/1JC based on the following alignment of critical electrical and mechanical parameters:

Qualifying Substitution Criteria:

• Identical turns ratio (1CT:1CT)
• Identical ET (Volt-Time) specification (20VµS)
• Identical mounting type (Surface Mount)
• Identical physical dimensions (0.375" L x 0.354" W / 9.52mm x 9.00mm)
• Identical maximum seated height (0.250" / 6.35mm)
• Identical operating temperature range (0°C ~ 70°C)
• Identical moisture sensitivity level (MSL 1 - Unlimited)
• Identical base product series (786 family)

The primary electrical difference is inductance specification: the 78615/1MC operates at 2mH while the 78615/1JC operates at 1.7mH. This 15% reduction in inductance falls within the tolerance envelope for general purpose pulse transformer applications where the ET parameter remains constant.

Parameter Comparison

Engineering Selection Recommendations

The 78615/1JC is the qualified substitute for the 78615/1MC based on product lifecycle status and regulatory compliance alignment. The 78615/1MC carries a "Not For New Designs" designation, indicating Murata has transitioned this component to end-of-life status. The 78615/1JC maintains Active product status within the same 786 series family, ensuring continued manufacturer support, availability, and compliance updates.

Both parts maintain identical ROHS3 compliance and MSL 1 ratings, confirming equivalent environmental and handling requirements. The 78615/1JC's Active status provides assurance of ongoing supply chain availability and technical documentation support for production environments.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between the 78615/1MC and 78615/1JC?

A: The inductance specification differs: 78615/1MC operates at 2mH while 78615/1JC operates at 1.7mH. All other electrical parameters, including ET (Volt-Time) at 20VµS, and all mechanical parameters remain identical. The product status differs, with 78615/1MC marked "Not For New Designs" and 78615/1JC marked "Active."

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical dimensions of 0.375" L x 0.354" W (9.52mm x 9.00mm) with a maximum seated height of 0.250" (6.35mm). They are pin-compatible for PCB layout purposes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 78615/1MC and 78615/1JC are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings. Both operate across the 0°C to 70°C temperature range.

Q: Why should I transition from 78615/1MC to 78615/1JC?

A: The 78615/1MC carries a "Not For New Designs" status, indicating Murata has discontinued active development and support for this component. The 78615/1JC maintains Active product status, ensuring continued availability, technical support, and compliance updates from the manufacturer.

Q: Are there any circuit design considerations when substituting these parts?

A: The 15% inductance reduction (2mH to 1.7mH) with constant ET specification maintains the core magnetic properties required for pulse transformer applications. Circuit validation should confirm that the lower inductance value meets application-specific requirements for energy storage and pulse shaping characteristics.