1N4749A Zener Diode 24V 10.5mA 1W DO-41

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1N4749A Zener Diode 24V 10.5mA 1W DO-41 The 1N4749A is a high-reliability silicon Zener diode designed for precise electronic circuit management . Encased in a standard DO-41 glass package, this axial-leaded component offers excellent thermal performance and an exceptionally sharp reverse breakdown characteristic . It provides a tight 5% nominal Zener voltage tolerance, making it an excellent choice for stabilizing circuits under changing operating conditions . Features High Reliability Sharp Breakdown Low Leakage Precise Tolerance Environmental Standard Specifications Parameter / Symbol Value / Condition Nominal Zener Voltage (V Znom ) 24 V Zener Test Current (I ZT ) 10.5 mA Max. Zener Impedance at I ZT (Z ZT ) < 25 Ω Max. Zener Impedance at I ZK (Z ZK ) < 750 Ω Zener Regulator Current (I ZK ) 0.25 mA Maximum Reverse Leakage Current (I R ) < 5 μA Reverse Voltage (V R ) 18.2 V Forward Voltage (V F ) Max. 1.2 V (tested at I F = 200 mA) Absolute Maximum Ratings Parameter / Symbol Value / Rating Power Dissipation (P v ) 1 W (when ambient temperature T amb ≤ 50°C) Maximum Junction Temperature (T J ) 200 °C Storage Temperature Range (T STG ) -65 °C to +175 °C Maximum Thermal Resistance (Junction Ambient, R THJA ) 100 K/W (at lead length l = 9.5mm (3/8″) with constant lead temperature T L ) Applications Voltage Stabilization Package Content 1 x 1N4749A Zener Diode 24V 10.5mA 1W DO-41 DataSheet 1N4749A