Murata Power Solutions 78604/9MC Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 78604/9MC is a 10mH general purpose pulse transformer with a 2:1 turns ratio, designed for surface mount applications. This component features a compact form factor of 0.375" L x 0.354" W with a maximum seated height of 0.250". The part is classified as "Not For New Designs," indicating it has reached end-of-life status. For new design implementations or ongoing production requiring this transformer specification, equivalent substitute parts must be evaluated based on electrical and mechanical compatibility parameters.

Substiute Parts

78604/9MC

Murata Power Solutions Inc.In Stock: 95278604/9MC Datasheet

Current PartRFQ

78604/9JC

Murata Power Solutions Inc.In Stock: 229978604/9JC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78604/9MC is determined by strict equivalence across the following critical parameters:

• Inductance: Must be 10mH
• ET (Volt-Time): Must be 56VµS
• Turns Ratio: Must be 2:1 primary to secondary
• Transformer Type: Must be general purpose classification
• Mounting Type: Must be surface mount
• Physical Dimensions: Must accommodate 0.375" L x 0.354" W footprint with maximum 0.250" seated height
• Compliance Standards: Must maintain ROHS3 compliance and MSL 1 rating

The substitute part 78604/9JC meets all electrical and mechanical equivalence criteria, with the primary distinction being its active product status and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The 78604/9JC is the manufacturer-recommended substitute for the 78604/9MC. Both parts maintain identical electrical specifications (10mH inductance, 56VµS ET, 2:1 turns ratio) and equivalent mechanical form factors suitable for surface mount PCB assembly.

The 78604/9JC offers the following advantages for new designs and ongoing production:

• Active Product Status: The 78604/9JC is actively manufactured and supported, ensuring long-term supply chain availability compared to the end-of-life 78604/9MC.
• Extended Operating Temperature Range: Operating range of -40°C to 85°C provides broader thermal performance envelope compared to 0°C to 70°C.
• Regulatory Compliance: REACH Unaffected status simplifies regulatory documentation requirements for certain markets.

Physical dimensions show minor orientation differences (length and width are transposed), but both maintain the same 0.250" maximum seated height and are compatible with equivalent PCB footprints.

Frequently Asked Questions (FAQ)

Q: Are the 78604/9MC and 78604/9JC electrically interchangeable?

A: Yes. Both parts are specified with identical inductance (10mH), ET value (56VµS), and turns ratio (2:1), meeting the core electrical requirements for general purpose pulse transformer applications.

Q: What is the significance of the "Not For New Designs" status on the 78604/9MC?

A: This designation indicates the part has reached end-of-life and is no longer recommended for new product development. Existing inventory may be available, but long-term supply cannot be guaranteed. The 78604/9JC is the active equivalent for new designs.

Q: Do the physical dimension differences between the two parts affect PCB layout?

A: The 78604/9MC and 78604/9JC have transposed length and width dimensions (0.375" x 0.354" versus 0.354" x 0.375"), but both maintain identical maximum seated height of 0.250". PCB footprint design must accommodate the specific orientation of the selected part. Both are surface mount components with equivalent mounting requirements.

Q: What is the difference in operating temperature ranges, and does it matter for my application?

A: The 78604/9MC operates from 0°C to 70°C, while the 78604/9JC operates from -40°C to 85°C. If your application requires operation below 0°C or above 70°C, the 78604/9JC is required. For applications within the 0°C to 70°C window, both parts are functionally equivalent.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts are ROHS3 compliant and carry EAR99 ECCN classification. The 78604/9JC is REACH Unaffected, while the 78604/9MC is REACH Affected. For applications subject to REACH regulations, the 78604/9JC may simplify compliance documentation.

Q: What is the Moisture Sensitivity Level (MSL) rating, and what does it mean?

A: Both parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture control requirements. These components do not require special dry-pack storage or baking procedures prior to assembly.