180 V regulation in a hand-solderable package
The 1N6030B/TR is a 180 V Zener diode in the classic DO-35 axial-lead package — a voltage reference you can breadboard, dead-bug, or solder into a through-hole board without a microscope. Rated for 500 mW continuous power dissipation, it handles the steady-state bias current for a voltage rail or clamp circuit without needing a heatsink. The ±5% tolerance on the 180 V nominal means the actual Zener voltage sits between 171 V and 189 V — tight enough for most regulation and overvoltage protection roles.
Temperature range and reverse leakage
Operating from -65°C to 175°C, this diode covers military-temperature and high-reliability applications — the junction can sit hot without derating the 500 mW ceiling. Reverse leakage is specified at 100 nA maximum at 137 V reverse bias — well below the Zener knee, so the diode draws negligible current until it reaches the breakdown region. Maximum forward voltage is 1.1 V at 200 mA forward current — useful if you also need a general-purpose rectifier in the same DO-35 footprint.
Active production — no end-of-life concern
The /TR suffix denotes Tape & Reel packaging, which is the standard reel format for automated insertion equipment, even though the diode itself is through-hole.