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IN4742A from ONTC

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IN4742A

Manufacturer: ONTC, ST

Zeners

Partnumber Manufacturer Quantity Availability
IN4742A ONTC, ST 20250 In Stock

Description and Introduction

Zeners The **IN4742A** is a Zener diode manufactured by **STMicroelectronics (ST)**. Below are its specifications, descriptions, and features based on factual information:  

### **Specifications:**  
- **Zener Voltage (Vz):** 12V  
- **Power Dissipation (Ptot):** 1W  
- **Tolerance:** ±5%  
- **Maximum Zener Impedance (Zzt):** 9Ω  
- **Test Current (Izt):** 21mA  
- **Reverse Leakage Current (Ir):** 5μA (at 9.12V)  
- **Operating Temperature Range:** -65°C to +200°C  
- **Package:** DO-41 (Axial Leaded)  

### **Description:**  
The **IN4742A** is a **1W, 12V Zener diode** designed for voltage regulation and protection in electronic circuits. It maintains a stable reference voltage when operated in reverse breakdown mode.  

### **Features:**  
- **High reliability**  
- **Low impedance**  
- **Precise voltage regulation**  
- **Wide operating temperature range**  
- **Axial lead package for easy mounting**  

This information is sourced from ST's official datasheets and product documentation.

Application Scenarios & Design Considerations

Zeners

Alternative Part Number

  • 1N4742A --: Standard 1N4742A 12V 1W zener diode from a major manufacturer, direct electrical equivalent with wide availability.
  • BZX85C12 --: 12V 1.3W zener diode in DO-41 package, similar voltage and power rating, suitable replacement with different series naming.
  • 1N5349B --: 12V 5W zener diode offering higher power margin, usable as a robust alternative when 1W dissipation is not critical.

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