The 1N5366B is a Zener Diode with cathode band polarity.
The 1N5333B series Surmetic™ Voltage Regulator Zener Diode with tight limits and better operating characteristics that reflect the superior capabilities of silicon-oxide passivated junctions. All this in an axial lead, transfer-moulded plastic package that offers protection in all common environmental conditions. All external surfaces are corrosion-resistant and leads are readily solderable.
The BZT03 series Zener Diode with glass passivated junction and hermetically sealed package. It is used in medium power voltage regulators and medium power transient suppression circuits.