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1SMA4746TR
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1SMA4746TR

Product Overview

Category

The 1SMA4746TR belongs to the category of surface mount silicon zener diodes.

Use

It is commonly used for voltage regulation and transient suppression in electronic circuits.

Characteristics

  • Zener voltage: 18V
  • Power dissipation: 1.5W
  • Package type: SMA
  • RoHS compliant

Packaging/Quantity

The 1SMA4746TR is typically available in tape and reel packaging with a quantity of 3000 units per reel.

Specifications

  • Zener Voltage (Vz): 18V
  • Power Dissipation (Pd): 1.5W
  • Operating Temperature: -65°C to +150°C
  • Forward Voltage: 1.5V
  • Reverse Leakage Current: 5µA

Detailed Pin Configuration

The 1SMA4746TR has two pins, with the anode connected to the positive side and the cathode connected to the negative side of the circuit.

Functional Features

  • Precise voltage regulation
  • Transient voltage suppression
  • Fast response time

Advantages

  • Small form factor
  • High reliability
  • Wide operating temperature range

Disadvantages

  • Limited power dissipation capability
  • Sensitive to overvoltage conditions

Working Principles

The 1SMA4746TR operates based on the principle of the Zener effect, where it maintains a constant voltage across its terminals when reverse-biased.

Detailed Application Field Plans

This diode is widely used in voltage regulation circuits, surge protection, and transient voltage suppression in various electronic devices such as power supplies, communication equipment, and automotive electronics.

Detailed and Complete Alternative Models

  • 1SMA4739TR
  • 1SMA4743TR
  • 1SMA4750TR

In conclusion, the 1SMA4746TR is a surface mount silicon zener diode with a zener voltage of 18V and a power dissipation of 1.5W. It is commonly used for voltage regulation and transient suppression in electronic circuits, offering precise voltage regulation and fast response time. While it has advantages such as a small form factor and high reliability, it also has limitations in power dissipation capability and sensitivity to overvoltage conditions. This diode finds extensive application in various electronic devices and has alternative models available for different voltage requirements.

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  1. What is 1SMA4746TR used for?

    • 1SMA4746TR is a surface mount transient voltage suppressor diode commonly used for overvoltage protection in electronic circuits.

  2. What is the maximum working voltage of 1SMA4746TR?

    • The maximum working voltage of 1SMA4746TR is 36.8V.

  3. What is the peak pulse power dissipation of 1SMA4746TR?

    • The peak pulse power dissipation of 1SMA4746TR is 400W.

  4. What are the typical applications of 1SMA4746TR?

    • Typical applications of 1SMA4746TR include protection of sensitive electronic components, such as integrated circuits, against voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD).

  5. What is the operating temperature range of 1SMA4746TR?

    • The operating temperature range of 1SMA4746TR is -55°C to +150°C.

  6. What is the package type of 1SMA4746TR?

    • 1SMA4746TR comes in a DO-214AC (SMA) package.

  7. How does 1SMA4746TR provide overvoltage protection?

    • 1SMA4746TR clamps the voltage across the protected circuit when it exceeds the breakdown voltage of the diode, diverting excess current away from the sensitive components.

  8. Can 1SMA4746TR be used for automotive applications?

    • Yes, 1SMA4746TR is suitable for automotive applications where protection against voltage transients is required.

  9. What are the key features of 1SMA4746TR?

    • Key features of 1SMA4746TR include low clamping voltage, fast response time, and high surge capability.

  10. Is 1SMA4746TR RoHS compliant?

    • Yes, 1SMA4746TR is RoHS compliant, making it suitable for use in environmentally conscious designs.