1N6309 thru 1N6355D Available on commercial versi.
1N6353US - (1N6309US - 1N6355US) VOIDLESS-HERMETICALLY-SEALED Surface Mount
1N6353C - 500mW GLASS ZENER DIODES
1N6353 - 500mW GLASS ZENER DIODES
1N6353D - 500mW GLASS ZENER DIODES