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1N4742A The 1N4742A is a 12V Zener Diode from On Semiconductor, rated for 1W power dissipation. It comes in a DO-41 through-hole package.
Mfr Part #:

1N4742A

Available from 4 distributors
Mfr Name: On Semiconductor
On Semiconductor
The 1N4742A is a 12V Zener Diode from On Semiconductor, rated for 1W power dissipation. It comes in a DO-41 through-hole package.
Total Stock: 24,804 pcs

1N4742A Available from 4 distributors

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1N4742A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Impedance (Max) (Zzt)
Impedance (Zzt)
Lead Style
Mounting Type
Operating Temperature
Operating Temperature Range
Package / Case
Power
Power Dissipation
Reverse Leakage Current
SVHC Present
Supplier Device Package
Tape & Reel
Tolerance
Voltage
Zener Voltage

1N4742A Description

Short technical summary and product information.

The 1N4742A is a Zener diode designed for voltage regulation applications. It provides a nominal Zener voltage of 12V with a tolerance of ±5%. With a power dissipation rating of 1W, it can handle moderate power levels in through-hole designs.

 

The diode features a maximum impedance of 9Ω at the Zener voltage and a reverse leakage current of 5µA at 9.1V. It operates over a wide temperature range from -65°C to 200°C, making it suitable for harsh environments.

 

The device is packaged in a DO-41 (DO-204AL) axial leaded package, designed for through-hole mounting. This package is commonly used for general-purpose Zener diodes and offers reliable thermal performance.

 

Typical applications include voltage clamping, reference voltage generation, and overvoltage protection in power supplies and other electronic circuits.

1N4742A Quick Information

Product Type: Zener Diode
Canonical Name: 1N4742A Zener Diode, 12V, 1W, DO-41
Subcategory: Single Zener Diode

1N4742A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

1N4742A Features

  • Zener voltage of 12V with ±5% tolerance.
  • Power dissipation rating of 1W.
  • Low impedance of 9Ω at Zener voltage.
  • Wide operating temperature range from -65°C to 200°C.
  • Through-hole DO-41 package for easy mounting.

1N4742A Applications

  • Used for voltage regulation in power supplies.
  • Provides a stable voltage reference for circuits.
  • Suitable for overvoltage protection applications.
  • Ideal for clamping circuits in electronic designs.

1N4742A FAQs

7 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of the 1N4742A?

12V.

What package does the 1N4742A come in?

DO-41 (DO-204AL) axial leaded through-hole package.

What is the tolerance of the 1N4742A Zener voltage?

±5%.

What is the maximum impedance of the 1N4742A?

9Ω.

What is the reverse leakage current of the 1N4742A?

5µA at 9.1V.

What is the operating temperature range of the 1N4742A?

-65°C to 200°C.

How is the 1N4742A mounted?

Through hole, axial leaded.

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