HD1A4A

Hi Korg,

We are checking and will update you.

Thanks, and regards,

Avinash Kumar

Hi Korg,

We don't have the exact replacement in Renesas, but you can replace the HD1A4A (NPN BJT) with a MOSFET, but the circuit must be adjusted since BJTs are current-controlled and MOSFETs are voltage-controlled. let me know if you require any further assistance.

Thanks, and regards,

Avinash Kumar