The RLT635-300-TO3 from Roithner Lasertechnik is a Laser Diode with Wavelength 630 to 642 nm, Output Power 0.3 W, Operating Voltage 2.1 to 2.3 V, Operating Current 0.85 to 1 A, Threshold Current 550 to 620 mA. More details for RLT635-300-TO3 can be seen below.