Equivalent & Substitute Parts for 78613/4MC Pulse Transformer

Part Overview

The 78613/4MC is a 67µH General Purpose Pulse Transformer with 1CT:1 turns ratio, designed for surface mount applications. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Organizations currently using this part in active production or maintenance applications require qualified substitute components that maintain functional compatibility while meeting current manufacturing and compliance standards.

Substiute Parts

78613/4MC

Murata Power Solutions Inc.In Stock: 94678613/4MC Datasheet

Current PartRFQ

78613/4JC

Murata Power Solutions Inc.In Stock: 110878613/4JC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78613/4MC is determined by the following critical parameters:

Mandatory Matching Parameters:

• Turns Ratio: 1CT:1
• Mounting Type: Surface Mount
• Physical Dimensions: 0.375" L x 0.354" W (9.52mm x 9.00mm)
• Height - Seated (Max): 0.250" (6.35mm)
• Operating Temperature Range: 0°C ~ 70°C
• ET (Volt-Time): 4VµS
• Transformer Type: General Purpose

Allowable Variation:

• Inductance: The 78613/4MC operates at 67µH. Substitute parts within the 786 series family may operate at different inductance values while maintaining all other electrical and mechanical parameters.

The 78613/4JC qualifies as a direct substitute based on matching all mandatory parameters. The inductance difference (50µH versus 67µH) reflects a variant within the same product family designed for applications with different energy storage requirements while maintaining identical form factor, turns ratio, and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 78613/4JC serves as the qualified substitute for the 78613/4MC based on the following engineering criteria:

Compliance and Regulatory Status: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory requirements. The 78613/4JC carries Active product status, providing assurance of continued manufacturing support and availability.

Physical and Electrical Compatibility: The substitute part maintains identical physical dimensions, mounting type, and thermal operating range. The ET (Volt-Time) specification of 4VµS is preserved, ensuring compatibility with pulse transformer applications requiring this specific energy transfer characteristic.

Form Factor Preservation: Surface mount footprint and height specifications are identical, allowing direct PCB layout compatibility without redesign requirements.

Inductance Consideration: The inductance difference between the main part (67µH) and substitute (50µH) represents a design variant within the 786 series family. Component selection between these variants depends on application-specific energy storage requirements. Both maintain the same turns ratio and physical envelope.

Frequently Asked Questions (FAQ)

Q: Can the 78613/4JC be used as a direct replacement for the 78613/4MC on existing PCBs?

A: Yes, from a physical and mounting perspective. The 78613/4JC maintains identical surface mount footprint, dimensions, and height specifications. However, the inductance difference (50µH versus 67µH) must be evaluated against application requirements. If the circuit design specifically requires 67µH inductance, the lower inductance of the substitute may affect performance.

Q: What is the significance of the "Not For New Designs" status on the 78613/4MC?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. Existing inventory may remain available, but long-term supply cannot be guaranteed. The 78613/4JC, with Active status, represents the current manufacturing alternative.

Q: Are there any compliance differences between these parts?

A: No. Both components maintain identical RoHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level (MSL) ratings. Regulatory and environmental compliance requirements are equivalent.

Q: How does the inductance difference affect circuit performance?

A: Inductance directly affects energy storage capacity and pulse transformer behavior. The 78613/4JC operates at 50µH compared to the 78613/4MC at 67µH. Applications requiring specific inductance values must account for this 25% reduction. The ET (Volt-Time) specification remains constant at 4VµS for both parts.

Q: Are the physical dimensions truly identical?

A: Yes. Both parts share identical length (0.375" / 9.52mm), width (0.354" / 9.00mm), and maximum seated height (0.250" / 6.35mm). PCB layout and assembly processes require no modification.

Q: What is the inventory status for these parts?

A: The 78613/4MC has 923 pieces in stock (Not For New Designs status). The 78613/4JC has 1098 pieces in stock with Active product status, indicating ongoing manufacturing and supply continuity.