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ONSEMI 1N4742A Zener Diode

The ONSEMI 1N4742A is a Zener diode within the 1N4728A to 1N4758A series, offering a range of reverse breakdown voltages. It's commonly used in voltage regulator circuits, overvoltage protection, and voltage clamping applications. The device is encapsulated in a DO-41 glass case and marked with a color band to indicate the cathode. Its robust design and reliable performance make it suitable for various industrial and consumer electronic applications. Datasheet specifications include absolute maximum ratings, electrical characteristics, and top marking information for identification and traceability.

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ONSEMI 1N4742A Zener Diode Specifications:

  • Absolute Maximum Ratings: Ta = 25°C unless otherwise noted
  • Power Dissipation: 1.0 W @ TL50C, Lead Length = 3/8”
  • Derate: 6.67 mW/C above 50C
  • Operating and Storage Temperature Range: -65 to +200 C
  • Electrical Characteristics: Ta = 25°C unless otherwise noted
  • VZ (V) @ IZ (Note 1): 3.135-4.935 V (See datasheet for full range)
  • Test Current IZ (mA): 53-76 mA
  • Max. Zener Impedance: 8-500 
  • Leakage Current: 0.5-100 A
  • Non-Repetitive Peak Reverse Current: 2 Square wave Reverse Surge at 8.3 msec soak time
  • Zener Voltage: Measured with the device junction in thermal equilibrium at the lead temperature (TL) at 30C ± 1C and 3/8” lead length.
  • Cathode Band: Denotes cathode
  • Top Mark Information: ON Semiconductor Logo, Device Name, Date Code

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Frequently Asked Questions

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You can download the 1N4742A datasheet or visit the ONSEMI website for support.

Who is the manufacturer of 1N4742A?

ONSEMI

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