Equivalent & Substitute Parts for 78613/2MC Pulse Transformer

Part Overview

The 78613/2MC is a 500µH general purpose pulse transformer manufactured by Murata Power Solutions Inc., designed for surface mount applications with a 1CT:1 turns ratio. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Organizations using this part in active production or maintenance applications require access to functionally equivalent alternatives that maintain electrical and mechanical compatibility while offering improved product status or availability.

Substiute Parts

78613/2MC

Murata Power Solutions Inc.In Stock: 103378613/2MC Datasheet

Current PartRFQ

78613/2JC

Murata Power Solutions Inc.In Stock: 85378613/2JC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78613/2MC is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Transformer type classification (General Purpose)
• Turns ratio (1CT:1)
• ET (Volt-Time) specification (10VµS)
• Surface mount mounting type
• Physical footprint (0.375" L x 0.354" W / 9.52mm x 9.00mm)
• Height constraint (0.250" maximum seated height)
• Operating temperature range (0°C to 70°C minimum)
• RoHS3 compliance requirement
• Moisture sensitivity level (MSL 1)

Allowable Variation:

• Inductance tolerance: The 78613/2JC substitute operates at 490µH, representing a 2% reduction from the 500µH specification of the primary part. This variance falls within acceptable engineering tolerances for general purpose pulse transformer applications where the ET parameter remains constant.

The 78613/2JC qualifies as a direct substitute based on matching all critical parameters while maintaining functional equivalence through identical ET specification and physical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 78613/2JC represents the qualified substitute for the 78613/2MC based on the following engineering criteria:

Compliance and Certification Alignment: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental compatibility across supply chain transitions.

Product Status Advantage: The 78613/2JC carries an "Active" product status designation, contrasting with the "Not For New Designs" classification of the 78613/2MC. This status improvement provides extended manufacturer support, improved long-term availability, and alignment with current manufacturing standards.

Electrical Equivalence: The 2% inductance variance (490µH versus 500µH) is offset by identical ET specification (10VµS), maintaining functional performance in general purpose pulse transformer applications. The constant ET parameter ensures equivalent energy transfer characteristics across the operating range.

Physical and Thermal Compatibility: Identical footprint, height, and operating temperature specifications ensure direct PCB compatibility without design modification or thermal management recalculation.

Inventory Availability: The 78613/2JC maintains substantial stock levels (839 pieces), supporting production continuity and reducing supply chain risk compared to legacy part availability.

Frequently Asked Questions (FAQ)

Q: Can the 78613/2JC be used as a direct replacement for the 78613/2MC on existing PCBs?

A: Yes. The 78613/2JC provides direct physical and electrical compatibility. Identical footprint dimensions (0.375" L x 0.354" W), height (0.250"), and mounting type (surface mount) enable direct substitution without PCB redesign. The 2% inductance reduction is functionally equivalent due to matching ET specification.

Q: What does the "Not For New Designs" status mean for the 78613/2MC?

A: This designation indicates the manufacturer has transitioned the part to legacy status and recommends using current-generation alternatives for new product development. Existing applications may continue using this part, but new designs should incorporate the 78613/2JC or other active-status equivalents.

Q: Are there compliance differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance, REACH unaffected status, and moisture sensitivity level (MSL 1). Regulatory and environmental requirements are fully aligned.

Q: How does the inductance difference affect circuit performance?

A: The 490µH inductance of the 78613/2JC represents a 2% reduction from the 500µH specification of the 78613/2MC. In general purpose pulse transformer applications, this variance is within acceptable engineering tolerance. The identical ET (Volt-Time) specification of 10VµS ensures equivalent energy transfer performance.

Q: What is the significance of matching ET specifications?

A: ET (Volt-Time) is a fundamental parameter determining energy transfer capability in pulse transformers. Identical ET values (10VµS) between the 78613/2MC and 78613/2JC ensure equivalent performance in energy transfer applications, independent of minor inductance variations.

Q: Are there packaging differences?

A: Both parts are supplied in tube packaging. No packaging format changes are required for substitution.

Q: What inventory considerations apply to this substitution?

A: The 78613/2JC maintains active production status with 839 pieces in stock, compared to 938 pieces of the legacy 78613/2MC. The active status provides superior long-term availability assurance for ongoing production requirements.