30 V zener in a DO-35 axial body
The 1N6011B/TR is a 30 V zener diode in the standard DO-35 axial-lead package, rated for 500 mW continuous power dissipation. The ±5% tolerance on the nominal zener voltage means the actual breakdown sits between 28.5 V and 31.5 V at the specified test current — tight enough for most rail-clamp and reference applications without binning.
Temperature range and leakage profile
Operating junction temperature spans -65°C to 175°C, a full military-grade range that covers engine-bay, downhole, and satellite thermal cycling without derating the power limit. Reverse leakage is specified at 100 nA maximum with 23 V applied across the junction — 7 V below the nominal zener voltage — so the diode draws negligible current in the off state until it hits the breakdown knee.
Dynamic impedance and forward characteristics
Maximum zener impedance (Zzt) is 78 Ohms at the test current — this is the effective series resistance in the breakdown region. A lower impedance means tighter voltage regulation under varying bias; 78 Ohms is typical for a 30 V, 500 mW die. Forward voltage is 1.1 V maximum at 200 mA forward current, so the diode also serves as a general-purpose rectifier in a pinch.
The Tape & Reel packaging (TR suffix) suits automated pick-and-place for through-hole insertion, though the DO-35 body is also commonly handled in bulk or ammo-pack.