Equivalent & Substitute Parts for 78604/16MC

Part Overview

The 78604/16MC is a 4mH general purpose pulse transformer with a 2:1 turns ratio manufactured by Murata Power Solutions Inc. This component features surface mount packaging and operates across a 0°C to 70°C temperature range. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. For new applications and ongoing production requirements, equivalent substitute parts with active product status are available.

Substiute Parts

78604/16MC

Murata Power Solutions Inc.In Stock: 93578604/16MC Datasheet

Current PartRFQ

78604/16JC

Murata Power Solutions Inc.In Stock: 112078604/16JC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78604/16MC is determined by the following critical parameters:

• Turns Ratio: Must remain 2:1 (primary to secondary)
• Mounting Type: Must be Surface Mount to ensure PCB compatibility
• Physical Dimensions: Must match 0.375" L x 0.354" W and 0.250" maximum seated height for footprint compatibility
• ET (Volt-Time Product): Must be 28VµS to maintain equivalent magnetic core performance
• Operating Temperature Range: Must support 0°C to 70°C minimum
• Transformer Type: Must be General Purpose classification

The 78604/16JC meets all these substitution criteria. While the inductance differs (3.3mH versus 4mH), the identical ET value, turns ratio, physical dimensions, and mounting characteristics establish functional equivalence for pulse transformer applications where the ET parameter governs core saturation behavior.

Parameter Comparison

Engineering Selection Recommendations

The 78604/16JC is the designated manufacturer-recommended substitute for the 78604/16MC. Selection between these parts should be based on the following factors:

For New Designs and Production: The 78604/16JC is the appropriate choice. It carries Active product status, ensuring long-term availability and manufacturing support. Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings.

For Legacy System Maintenance: The 78604/16MC remains available in inventory (916 pieces) for applications where the original 4mH inductance specification is critical and cannot be modified. However, the 78604/16JC should be evaluated first due to its active status.

Compliance Considerations: Both parts are ROHS3 compliant. The 78604/16MC is REACH Affected, while the 78604/16JC is REACH Unaffected. For applications subject to REACH regulations, the 78604/16JC presents a compliance advantage.

Frequently Asked Questions (FAQ)

Q: Can the 78604/16JC directly replace the 78604/16MC in existing designs?

A: The 78604/16JC is the manufacturer-recommended substitute. Both parts share identical physical dimensions, mounting type, turns ratio, ET value, and operating temperature range. The primary difference is inductance (3.3mH versus 4mH). Direct substitution is valid where the ET parameter governs circuit performance rather than absolute inductance values.

Q: Why does the substitute part have different inductance?

A: The ET (volt-time product) value of 28VµS is the controlling parameter for pulse transformer core saturation behavior. Both parts maintain this identical ET specification despite different inductance values, making them functionally equivalent for pulse transformer applications.

Q: Are the physical footprints identical?

A: Yes. Both the 78604/16MC and 78604/16JC share identical surface mount dimensions of 0.375" L x 0.354" W with a maximum seated height of 0.250". No PCB layout modifications are required for substitution.

Q: What is the inventory status for each part?

A: The 78604/16MC has 916 pieces in stock with Not For New Designs status. The 78604/16JC has 1090 pieces in stock with Active product status, indicating ongoing manufacturing and long-term availability.

Q: Are there any compliance differences between these parts?

A: Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity. The 78604/16MC is REACH Affected, while the 78604/16JC is REACH Unaffected. For applications in REACH-regulated markets, the 78604/16JC is the preferred choice.