77208C

Overview

The 77208C is a pulse transformer manufactured by Murata Power Solutions, designed for through-hole PCB mounting. It features a 1:1:1 turns ratio and an inductance of 16.3 mH. The device provides an isolation voltage of 2500 Vrms and supports an ET constant of 460 Vµs. Primary DC resistance is 3.6 Ohms, with secondary resistances at 3.1 Ohms and 4.2 Ohms. The component has a capacitance of 40 pF and utilizes six terminal pins. Its physical dimensions are 25.4 mm in length, 20.3 mm in width, and 12.3 mm in height.

Feature Summary

• Encapsulated construction for SCR and Triac triggering applications
• High isolation voltage capability for circuit protection
• Through-hole pin termination for standard PCB integration

Applications

• Switch mode power supplies
• Thyristor firing circuits
• Triac trigger systems

Procurement Notes

Verify current availability status as the product lifecycle may indicate end-of-life or discontinuation phases. Confirm that the specific package type and pin configuration match the target design requirements before ordering. Check for any recent production cycle updates or alternative sourcing options if lead times are extended due to manufacturing constraints.

Selection Notes

Select this component for medium power applications requiring galvanic isolation between control and load sides. Ensure the operating voltage does not exceed the 2500 Vrms isolation rating. Verify that the primary and secondary DC resistance values align with the drive circuit's power dissipation limits. Confirm mechanical fit within the designated PCB footprint area.

Part Context

This part belongs to the 772 series of pulse transformers from Murata Power Solutions. These components are specialized for gate drive isolation in power electronics. The encapsulated design distinguishes it from open-frame variants, offering enhanced environmental protection for industrial switching environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer notices for potential obsolescence management strategies.