View 1pmt4xxx-series datasheet:

1PMT4614e3 thru 1PMT4627e3, 1PMT4099e3 thru 1PMT4135e3 POWERMITETM SCOTTSDALE DIVISION Low Noise 1 Watt Zener Diodes DESCRIPTION APPEARANCE This Microsemi Powermite® surface mount low noise Zener package series provides a higher power handling capability that are also RoHS compliant. In addition to its size advantages, Powermite® package features include a full-metallic bottom that eliminates the possibility of solder flux entrapment during assembly, and a unique locking tab acts as an efficient heat path DO-216 from die to mounting plane for external heat sinking with very low thermal resistance junction to case (bottom). Its innovative design makes this device ideal for use with automatic insertion equipment. IMPORTANT: For the most current data, consult