Murata Power Solutions 77203C Pulse Transformer - Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 77203C is a 1mH SCR and Triac trigger pulse transformer with a 2:1:1 turns ratio, designed for through-hole mounting applications. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance requirements. The 77203HVC represents the current active alternative from the same manufacturer, maintaining identical electrical and mechanical specifications while offering improved availability and compliance status.

Substiute Parts

77203C

Murata Power SolutionsIn Stock: 83877203C Datasheet

Current PartRFQ

77203HVC

Murata Power Solutions Inc.In Stock: 105477203HVC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 77203HVC qualifies as a direct substitute for the 77203C based on strict equivalence across all critical electrical and mechanical parameters. Substitution is valid when the following conditions are met:

• Inductance value matches exactly at 1mH
• ET (Volt-Time) product is identical at 120VµS
• Turns ratio configuration is identical at 2:1:1
• Transformer type classification is identical (SCR and Triac Trigger, Encapsulated)
• Mounting type is identical (Through Hole)
• Physical dimensions are identical (1.000" L x 0.799" W, height 0.484" max)
• Operating temperature range is identical (0°C ~ 70°C)

The primary distinction between these parts is product status and packaging format, not functional or physical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 77203HVC is the appropriate selection for new designs and component replenishment. This part maintains full electrical and mechanical compatibility with the 77203C while offering the advantage of active product status and current RoHS3 compliance certification. Both parts satisfy identical regulatory requirements under REACH and export classification (EAR99, HTSUS 8504.31.2000).

For applications currently using the 77203C, direct substitution with the 77203HVC requires no circuit modifications or board layout adjustments due to identical physical dimensions and electrical characteristics. The transition from obsolete to active status ensures continued supply chain availability and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the 77203HVC be used as a direct replacement for the 77203C in existing designs?

A: Yes. The 77203HVC is electrically and mechanically identical to the 77203C. All critical parameters—inductance, turns ratio, physical dimensions, and operating temperature range—are equivalent. No circuit or layout modifications are required.

Q: What is the primary reason to transition from 77203C to 77203HVC?

A: The 77203C is classified as obsolete, while the 77203HVC is an active product. This ensures continued availability, manufacturer support, and compliance with current regulatory standards.

Q: Are there any compliance differences between these parts?

A: Both parts are RoHS compliant and REACH unaffected. The 77203HVC carries ROHS3 certification, representing the current compliance standard. Both share identical export classification (EAR99) and tariff codes (HTSUS 8504.31.2000).

Q: Does packaging format affect electrical performance?

A: No. The 77203HVC is supplied in tube packaging, while the 77203C packaging format is not specified. Packaging format does not affect electrical characteristics, performance, or circuit compatibility.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 1.000" L x 0.799" W (25.40mm x 20.30mm) with a maximum seated height of 0.484" (12.30mm). Board layout and mounting hole spacing require no modification.