This part is a kind of semiconductor called 1N4553B.

Function of this product has DIODE.

Manufacturers : DSI

Image and pinout :

Some of the text within the PDF file :

Technical Data DIODE maximum ratings Voltage, Reverse (VZ) Voltage, Reverse Peak (VRM) Current at VR = OV (IO) Current Average Rectified (IF) Current Surge Peak (IZM) Current, Surge (IFM) at tp = Max. Power Dissipation (PT) at TC = 75 °C Max. Thermal Resistance (Rth J-C) Max. Junction Temperature (TJ) 5.6 V empty V empty A empty A 8.1 A empty A 50.0 W 2.0 °C/W 175.0 °C NO. TYPE empty empty CASE empty empty 1N4553B 50W-ZENER empty empty DO-5_UNF ANODE TO CASE empty PERFORMANCE CHARACTERISTICS at T = 25°C, unless otherwise noted C NO. SYMBOL CONDITIONS MIN. MAX. UNITS 1. VF IF = 10.0 A (1) - 1.5 V 2. VZ IZ = 2.25 A 5.3 5.35 V 3. IR VR = 1.0 V - 20.0 µA 4. RZ IZ = 2.25 A - 0.12 Ω 5. RZ IZ = 5.0 mA - 900.0 Ω 6. 7. 8. 9. 10. 11. 12. 13. [ ... ]

1N4553B PDF Datasheet Download