STMicroelectronics, 28.2V Zener Diode 600 W SMT 2-Pin DO-214AA

The SM6TY series are designed to protect sensitive automotive circuits against surges and against electrostatic discharges. The Planar technology makes it compatible with high-end circuits where low leakage current and high junction temperature are required to provide long term reliability and stability.

Peak pulse power: 600 W (10/1000 μs) and 4 kW (8/20 μs)
Stand-off voltage range from 5 V to 188 V
Unidirectional and bidirectional types
Low leakage current: 0.2 μA at 25 °C and 1 μA at 85 °C
Operating Tj max: 150 °C
High power capability at Tj max.: up to 515 W (10/1000 μs)
Lead finishing: matte tin plating