Murata Power Solutions 78601/16MC Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 78601/16MC is a 4mH general purpose pulse transformer with 1:1 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 The part is classified as "Not For New Designs," indicating it has been superseded in Murata's product portfolio. Organizations currently using this component or requiring equivalent functionality must identify suitable alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

78601/16MC

Murata Power SolutionsIn Stock: 87078601/16MC Datasheet

Current PartRFQ

78601/16JC

Murata Power Solutions Inc.In Stock: 88178601/16JC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78601/16MC is determined by the following critical parameters:

• Transformer Type: Must be General Purpose pulse transformer
• Turns Ratio: Must maintain 1:1 primary to secondary ratio
• Mounting Type: Must be Surface Mount to ensure PCB compatibility
• Physical Dimensions: Must match 0.375" L x 0.354" W (9.52mm x 9.00mm) footprint and 0.250" (6.35mm) maximum seated height
• ET (Volt-Time) Product: Must be 28VµS to maintain core saturation characteristics
• Operating Temperature Range: Must support 0°C ~ 70°C minimum
• Packaging: Tube packaging for component handling consistency

The 78601/16JC qualifies as a direct substitute based on these parameters. While the inductance value differs slightly (3.65mH versus 4mH), the ET product remains constant at 28VµS, indicating equivalent core material and saturation behavior. The identical physical dimensions, turns ratio, mounting type, and temperature range ensure mechanical and electrical compatibility in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The 78601/16JC is the qualified substitute for the 78601/16MC based on the following engineering criteria:

Product Status Alignment: The 78601/16MC is designated "Not For New Designs," making transition to an active product necessary for ongoing production and new applications. The 78601/16JC carries "Active" status, ensuring continued manufacturer support and availability.

Regulatory Compliance: Both parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) ratings. The 78601/16JC offers improved regulatory positioning with REACH Unaffected status, compared to the main part's REACH Affected classification. This distinction may be relevant for applications subject to REACH regulatory requirements.

Electrical Equivalence: The constant ET product (28VµS) across both parts indicates identical core material properties and saturation characteristics. The 3.65mH inductance of the substitute represents a 8.75% reduction from the main part's 4mH specification. This variance falls within the tolerance band established by the shared ET product and identical turns ratio, confirming functional equivalence for general purpose pulse transformer applications.

Mechanical Compatibility: Identical physical dimensions, mounting type, and packaging ensure direct PCB layout compatibility and assembly process alignment without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 78601/16JC be used as a direct replacement for the 78601/16MC in existing designs?

A: Yes. The 78601/16JC maintains identical physical dimensions (0.375" L x 0.354" W, 6.35mm max height), surface mount configuration, 1:1 turns ratio, and 28VµS ET product. Both parts operate across 0°C to 70°C and share ROHS3 compliance and MSL Level 1 ratings. The inductance difference (3.65mH versus 4mH) is governed by the constant ET product, confirming electrical equivalence for general purpose pulse transformer applications.

Q: What is the significance of the ET (Volt-Time) product in substitution?

A: The ET product (28VµS for both parts) represents the core's volt-second capacity and directly determines saturation behavior. When ET values are identical, transformers with different inductance values maintain equivalent core material properties and saturation characteristics. This parameter is the primary indicator of functional equivalence in pulse transformer substitution.

Q: Why does the 78601/16JC have lower inductance than the 78601/16MC?

A: Inductance is determined by core geometry and winding configuration. The 78601/16JC achieves the same ET product with 3.65mH inductance through optimized core design. Both parts deliver equivalent pulse transformer performance within their specified operating parameters.

Q: Are there packaging or handling differences between these parts?

A: Both parts are supplied in Tube packaging with MSL Level 1 (Unlimited) moisture sensitivity ratings. No special handling or storage modifications are required when transitioning between these components.

Q: What is the impact of the REACH status difference?

A: The 78601/16MC is REACH Affected, while the 78601/16JC is REACH Unaffected. For applications subject to REACH regulatory requirements, the 78601/16JC may offer simplified compliance documentation and supply chain management.