UNISONIC TECHNOLOGIES CO., LTD 1N4745A DIODE ZENER DIODE DESCRIPTION The UTC 1N4745A is a zener diode, it uses UTC’s advanced technology to provide customers with low inductance and low reverse leakage, etc. The UTC 1N4745A is suitable for use in stabilizing and clipping with high power rating. FEATURES DO-41 * Low reverse leakage * Low inductance * Glass passivated chip SYMBOL ORDERING INFORMATION Ordering Number Lead Free Halogen Free 1N4745AL-Z41-R 1N4745AG-Z41-R Note: Pin Assignment: A: Anode K: Cathode Package DO-41 Pin Assignment 1 2 K A Packing Tape Reel 1N4745AL-Z41-B (1)Packing Type (1) B: Tape Box, R: Tape Reel (2)Package Type (2) Z41: DO-41 (3)Green Package (3) L: Lead Free, G: Halogen Free and Lead Free MARKING Cathode Band for uni-directional Only 1N4745A L: Lead Free G: Halogen Free Date Code www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 3 QW-R601-211.B 1N4745A DIODE ABSOLUTE MAXIMUM RATINGS (TA=25°C unless otherwise noted) PARAMETER SYMBOL RATINGS UNIT Forward Voltage at IF=200mA VF 1.2 V DC Power Dissipation at TL=50°C (Note 2) PD 1 W Junction Temperature TJ -55~+175 °C Storage Temperature TSTG -55~+175 °C Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. TL=Lead temperature at 3/8 " (9.5mm) from body. 3. Valid provided that leads are kept at ambient temperature at a distance of 10 mm from case. THERMAL DATA PARAMETER Junction to Ambient Air (Note 3) SYMBOL θJA RATINGS 170 UNIT °C/W ELECTRICAL CHARACTERISTICS(Cont.) PART NUMBER 1N4745A Nominal Zener Voltage VZ @ IZT (V) 16 IZT (mA) 15.5 Maximum Zener Impedance ZZT @ IZT ZZK @ IZK (Ω) (Ω) 16 700 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw IZK (mA) 0.25 Maximum Maximum Maximum Reverse DC Zener Surge Leakage Current Current Current IR @ VR IZM IRM (μA) (V) (mA) (mApK) 0.1 12.2 57 285 2 of 3 QW-R601-211.B 1N4745A Temperature Coefficient, θVz (mV/℃) TYPICAL CHARACTERISTICS Maximum Power Dissipation, PD (W) DIODE Typical Thermal Resistance vs. Lead Length 175 Maximum Surge Power 100 150 Rectangular Waveform TJ=25 Prior to Initial Pulse 5% Duty Cycle 125 16V Non-Repetitive 100 10 75 50 10% Duty Cycle 20% Duty Cycle 25 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Lead Length to Heatsink , L (inches) 1 0.01 0.1 1 10 100 Pulse Width, PW, (s) 1000 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 3 QW-R601-211.B