The 1N5257B TR is an electronic component manufactured by Central Semiconductor Corp. It is an active component that falls under the category of discrete semiconductor products. It has a voltage tolerance of ±5%, a forward voltage of 1.1V at 200mA, and a reverse leakage current of 100nA at 25V. The voltage-zener is 33V, and the impedance is 58 Ohm. It is packaged in a DO-35 case and has a maximum power dissipation of 500mW.