Murata Power Solutions 78601/4MC Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 78601/4MC is a 67µH general purpose pulse transformer with a 1:1 turns ratio, designed for surface mount applications. This component operates across a 0°C to 70°C temperature range and features a compact footprint of 9.52mm × 9.00mm with a maximum seated height of 6.35mm.

The 78601/4MC carries a "Not For New Designs" product status, indicating that Murata has transitioned this model out of active production. Organizations currently using this component or requiring equivalent functionality must identify suitable alternatives to ensure long-term supply chain continuity and design flexibility.

Substiute Parts

78601/4MC

Murata Power SolutionsIn Stock: 88178601/4MC Datasheet

Current PartRFQ

78601/4JC

Murata Power Solutions Inc.In Stock: 99078601/4JC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78601/4MC is determined by the following critical parameters:

• Transformer Type: Must be General Purpose
• Turns Ratio: Must maintain 1:1 primary to secondary ratio
• Mounting Type: Must be Surface Mount
• Physical Footprint: Must match 9.52mm × 9.00mm dimensions with maximum seated height of 6.35mm
• ET (Volt-Time) Product: Must be 4VµS
• Operating Temperature Range: Must support 0°C ~ 70°C minimum
• Packaging Format: Must be supplied in Tube packaging
• Compliance Standards: Must maintain ROHS3 compliance and MSL 1 rating

The 78601/4JC qualifies as a direct substitute based on these parameters. While the inductance value differs (58µH versus 67µH), this variance falls within the allowable tolerance for general purpose pulse transformer applications where the ET product and turns ratio remain constant. Both components share identical physical dimensions, mounting characteristics, temperature operating range, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 78601/4JC is the qualified substitute for the 78601/4MC based on the following engineering criteria:

Product Status Alignment: The 78601/4JC maintains Active product status, ensuring ongoing manufacturer support and supply availability. This addresses the primary limitation of the 78601/4MC, which carries a "Not For New Designs" designation.

Compliance and Certification Continuity: Both components maintain ROHS3 compliance and MSL 1 (Unlimited) ratings, ensuring compatibility with current manufacturing and environmental standards. The 78601/4JC maintains ROHS3 compliance while the 78601/4MC is REACH Affected; the substitute is REACH Unaffected, providing additional regulatory flexibility.

Physical and Electrical Compatibility: Identical physical dimensions (9.52mm × 9.00mm footprint, 6.35mm maximum height) and mounting type ensure direct PCB layout compatibility. The matching ET product (4VµS) and 1:1 turns ratio preserve core transformer functionality across both components.

Inductance Variance: The inductance difference (58µH versus 67µH) represents a 13.4% reduction. This variance is acceptable for general purpose pulse transformer applications where the ET product remains constant, as the ET product directly determines the voltage-time capability of the transformer core.

Frequently Asked Questions (FAQ)

Q: Can the 78601/4JC be used as a direct drop-in replacement for the 78601/4MC?

A: Yes. Both components share identical physical dimensions, mounting type, footprint, and operating temperature range. PCB layout modifications are not required. The inductance difference (58µH versus 67µH) is within acceptable tolerance for general purpose pulse transformer applications where the ET product (4VµS) remains constant.

Q: What is the significance of the ET (Volt-Time) product being identical at 4VµS?

A: The ET product determines the maximum voltage-time capability of the transformer core. When the ET product is identical between two transformers, they can handle the same peak voltage and pulse duration combinations, making them functionally equivalent for pulse applications despite inductance variations.

Q: Why does the 78601/4MC have "Not For New Designs" status?

A: This designation indicates that Murata has transitioned the 78601/4MC out of active production. New designs should utilize the 78601/4JC, which carries Active product status and ensures long-term supply chain availability.

Q: Are there any compliance differences between these components?

A: Both components are ROHS3 compliant with MSL 1 (Unlimited) ratings. The 78601/4JC is REACH Unaffected, while the 78601/4MC is REACH Affected. For applications subject to REACH regulations, the 78601/4JC provides additional compliance advantages.

Q: What packaging format is used for both components?

A: Both the 78601/4MC and 78601/4JC are supplied in Tube packaging, ensuring compatibility with standard component handling and placement equipment.