Voltage Regulator Zener Diodes


Leads: Axial, Readily Solderable

Finish: External Surfaces Corrosion Resistant

Polarity: Cathode indicated by Band


Max. Ratings:

DC Power Dissipation: 500mW

(TL = 75�C, Lead Length = 3/8″)

Derated above 75�C: 40mW/�C

Operating & Storage Temperature: -65�C to 200�C


Electrical Characteristics (TA=25�C unless otherwise noted, VF=1.2V max., IF=200mA)

Nominal Zener Voltage: 56V nom. @ 20mA

Max. Zener Impedance: 35 ohms @ 20mA

Max. Zener Knee impedance: 280 ohms @ 1mA

(Test conditions for zener voltage and impedance are as follows: IZ is applied 40 � 10 ms prior
to reading. Mounting contacts are located 3/8, to 1/2, from the inside edge of mounting clips
to the body of the diode. (TA = 25�C +8, �2�C))

Max. Reverse Leakage Current: 0.5�A @ 42.6V

Max. Surge Current: 2.3A

(Surge current is specified as the maximum allowable peak, non-recurrent square-wave current
with a pulse width, PW, of 8.3 ms)

Max. Voltage Regulation: 0.39V

(VZ measurements are made at 10% and then at 50% of the IZ max value listed in the electrical characteristics table. The test current
time duration for each VZ measurement is 40 � 10 ms. (TA = 25�C +8, �2�C))

Max. Regulator Current: 86mA


Manufactured by: Motorola

Part number: 1N5370B


Full datasheet: 1N5370B