JAN/JANTX/JANTXV STANDARD PRODUCTS QUALIFIED PER MIL-PRF-19500/385 LOW ON RESISTANCE FAST SWITCHING HIGH OFF ISOLATION S LEVEL EQUIVALENT SCREENING OPTIONS RADIATION TOLERANT SECOND SOURCE FOR VISHAY & SILICONIX Part Number 2N4856 2N4857 2N4858 Package TO-18 TO-18 TO-18 19500/ 385 385 385 Breakd.