Murata Power Solutions 78613/8MC Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 78613/8MC is a 1mH general purpose pulse transformer with 1CT: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 The part carries a "Not For New Designs" status, indicating it has been superseded in Murata's product portfolio. Organizations currently using this component in active designs require qualified substitute parts to ensure supply continuity and maintain design performance specifications.

Substiute Parts

78613/8MC

Murata Power Solutions Inc.In Stock: 75078613/8MC Datasheet

Current PartRFQ

78613/8JC

Murata Power Solutions Inc.In Stock: 97678613/8JC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78613/8MC is determined by the following critical parameters:

• Inductance tolerance: The substitute part 78613/8JC operates at 980µH, representing a 2% reduction from the primary specification of 1mH. This variance falls within acceptable engineering tolerances for general purpose pulse transformer applications where the ET (Volt-Time) product remains constant.
• ET (Volt-Time) product: Both the primary part and substitute maintain an identical 15VµS rating, ensuring equivalent energy transfer characteristics.
• Turns ratio: Both components maintain the 1CT:1 configuration, preserving circuit impedance matching and signal integrity.
• Physical footprint: Identical surface mount dimensions (0.375" L x 0.354" W, 0.250" max height) enable direct PCB layout compatibility.
• Operating temperature range: Both parts support 0°C to 70°C operation, maintaining thermal performance parity.
• Compliance standards: Both components meet ROHS3 requirements and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Parameter Comparison

Engineering Selection Recommendations

The 78613/8JC serves as the qualified substitute for the 78613/8MC based on the following engineering criteria:

Product Status Alignment: The 78613/8JC maintains Active product status within Murata's current portfolio, ensuring long-term supply availability and manufacturing support. The primary part's "Not For New Designs" designation necessitates transition to an actively supported component.

Compliance Continuity: Both components maintain ROHS3 compliance and identical MSL 1 ratings, preserving regulatory and manufacturing process compatibility. The substitute does not introduce additional compliance burdens or supply chain constraints.

Electrical Performance Parity: The 980µH inductance of the substitute represents a 2% deviation from the 1mH primary specification. Combined with the identical 15VµS ET product and 1CT:1 turns ratio, this variance maintains functional equivalence for general purpose pulse transformer applications.

Physical Interchangeability: Identical surface mount footprints and maximum seated heights enable direct PCB layout substitution without redesign or rework requirements.

Frequently Asked Questions (FAQ)

Q: Can the 78613/8JC directly replace the 78613/8MC in existing designs?

A: Yes. The substitute part maintains identical physical dimensions, mounting type, turns ratio, ET product, and operating temperature range. The 2% inductance variance (980µH vs. 1mH) falls within standard engineering tolerances for general purpose pulse transformer applications.

Q: What is the significance of the "Not For New Designs" status on the primary part?

A: This designation indicates the 78613/8MC has been superseded in Murata's active product line. Organizations should transition to the 78613/8JC (Active status) for new designs and ongoing supply continuity.

Q: Are there any compliance or certification differences between these parts?

A: No. Both components maintain ROHS3 compliance, identical MSL 1 (Unlimited) moisture sensitivity ratings, and equivalent regulatory certifications. The substitute introduces no additional compliance requirements.

Q: Does the 2% inductance difference affect circuit performance?

A: For general purpose pulse transformer applications, the 2% inductance variance, combined with the identical ET (Volt-Time) product of 15VµS, maintains functional equivalence. The constant ET product ensures equivalent energy transfer characteristics across the specified operating range.

Q: Are packaging and inventory considerations different between these parts?

A: Both components are supplied in Tube packaging. Current inventory levels differ (699 pcs for 78613/8MC vs. 873 pcs for 78613/8JC), but the substitute's Active status ensures ongoing availability through standard distribution channels.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on: identical turns ratio (1CT:1), matching ET product (15VµS), compatible inductance tolerance (2% variance), identical physical footprint and height, matching operating temperature range (0°C to 70°C), and equivalent compliance certifications (ROHS3, MSL 1).