91 V regulation with tight ±1% tolerance
The 1N6023D is a 91 V Zener diode from Microchip Technology, rated for 500 mW continuous power dissipation in a DO-35 axial package. The ±1% tolerance on the Zener voltage means the regulation point stays within 90.09 V to 91.91 V across the operating range — tighter than the standard 5% grade, which matters when the downstream bias or clamp threshold has no margin for a wider window. Maximum impedance (Zzt) is 300 Ohms at the test current, and reverse leakage is specified at 100 nA maximum with 69 V applied across the junction — 22 V below the Zener knee, so the diode draws negligible current in the off state. Forward voltage drop is 1.1 V maximum at 200 mA, typical for a silicon junction of this die size.
The DO-35 glass package (DO-204AH) is hermetically sealed, which suits high-reliability and harsh-environment deployments where plastic-molded diodes risk moisture ingress.