This part is a kind of semiconductor called 1N937.

Function of this product has 9.0 VOLT NOMINAL ZENER VOLTAGE.

Manufacturers : Compensated Deuices Incorporated

Image and pinout :

Some of the text within the PDF file :

• 1N935B-1, 1N937B-1 AND 1N938B-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/156 • 9.0 VOLT NOMINAL ZENER VOLTAGE • TEMPERATURE COMPENSATED ZENER REFERENCE DIODES • METALLURGICALLY BONDED 1N935 thru 1N938B and 1N935B-1 thru 1N938B-1 MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C DC Power Dissipation: 500mW @ +50°C Power Derating: 4 mW / °C above +50°C REVERSE LEAKAGE CURRENT lR = 10µ A @ 25°C & VR = 6 Vdc ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified. JEDEC TYPE NUMBER ZENER VOLTAGE vz @ I ZT ZENER TEST CURRENT I ZT MAXIMUM ZENER IMPEDANCE (Note 1) Z ZT VOLTAGE TEMPERATURE TEMPERATURE RANGE STABILITY ∆V ZT MAXIMUM (Note 2) EFFECTIVE TEMPERATURE COEFFICIENT FIGURE 1 % / °C 0.01 0.0 [ ... ]

1N937 PDF Datasheet Download