1N4730A-T

The 1N4730A-T is a 3.9V Zener diode from Diodes Incorporated, part of the 1N4728A-1N4761A series of 1.0W Zener diodes. It features a nominal zener voltage of 3.9V at a test current of 64mA, with a tolerance of ±5%. The maximum zener impedance at the test current is 9Ω, and at 1mA it is 400Ω. Reverse leakage current is 50µA maximum at 1V reverse voltage. Forward voltage is 1.2V maximum at 200mA forward current. The device can handle a peak surge current of 1190mA for 8.3ms. The temperature coefficient of the zener voltage ranges from -0.07 to -0.02 %/°C. Power dissipation is 1W at 25°C ambient, with derating above 50°C at 6.67mW/°C. Thermal resistance from junction to ambient is 175°C/W. The operating and storage temperature range is -65°C to 175°C. The diode is packaged in a through-hole DO-41 (DO-204AL) glass case with axial leads, cathode band polarity marking, and Sn96.5Ag3.5 solderable terminals. It is RoHS compliant and lead-free. Note: This part is marked as obsolete/discontinued by the manufacturer.