110 V Zener, ±1% — voltage reference or clamp
The 1N6025D is a 110 V Zener diode from Microchip Technology, rated for 500 mW continuous power dissipation in a DO-35 axial-lead package. The ±1% tolerance on the nominal Zener voltage makes it a tighter reference than the standard 5% grade — useful when the rail or clamp threshold needs to stay within a volt or two of 110 V without trimming.