Littelfuse Inc.
Obrázek může být reprezentace.
Viz Specifikace pro podrobnosti o produktu.
SMDJ51A-HR
Zobrazit detail DataSheets

SMDJ51A-HR

Introduction

The SMDJ51A-HR is a component belonging to the category of transient voltage suppressor diodes. This entry provides an overview of its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

  • Category: Transient Voltage Suppressor Diode
  • Use: Protecting sensitive electronic devices from voltage transients induced by lightning, inductive load switching, and electrostatic discharge.
  • Characteristics: Fast response time, low clamping voltage, high surge current capability.
  • Package: SMD (Surface Mount Device)
  • Essence: Provides overvoltage protection to sensitive components.
  • Packaging/Quantity: Typically available in reels or tubes containing multiple units.

Specifications

  • Voltage - Reverse Standoff (Typ): 51V
  • Voltage - Breakdown (Min): 56.7V
  • Voltage - Clamping (Max) @ Ipp: 82.4V
  • Current - Peak Pulse (10/1000µs): 30.6A
  • Power - Peak Pulse: 1500W
  • Type: Zener

Detailed Pin Configuration

The SMDJ51A-HR typically has a standard SMD package with two terminals for surface mounting onto a printed circuit board. The pin configuration includes the anode and cathode connections.

Functional Features

  • Transient Voltage Suppression: Rapidly clamps transient voltages to a safe level, protecting downstream components.
  • Fast Response Time: Quickly responds to voltage transients to prevent damage to sensitive electronics.
  • High Surge Current Capability: Can withstand large surge currents without degradation.

Advantages and Disadvantages

Advantages

  • Effective protection against voltage transients.
  • Fast response time ensures minimal impact on the protected circuit.
  • High surge current capability enhances reliability.

Disadvantages

  • May require additional circuitry for comprehensive overvoltage protection.
  • Clamping voltage may not be suitable for all applications.

Working Principles

The SMDJ51A-HR operates based on the principle of avalanche breakdown. When a transient voltage spike occurs, the diode rapidly conducts, diverting excess current away from the protected circuit. This action effectively limits the voltage across the protected components.

Detailed Application Field Plans

The SMDJ51A-HR finds extensive use in various applications, including: - Telecommunications: Protecting sensitive communication equipment from lightning-induced surges. - Industrial Control Systems: Safeguarding control circuitry from inductive load switching transients. - Consumer Electronics: Providing overvoltage protection for electronic devices susceptible to electrostatic discharge.

Detailed and Complete Alternative Models

  • P6SMBJ51A: Similar specifications and package type.
  • 1.5SMCJ51A: Higher power dissipation capability.
  • SMAJ51A: Smaller form factor for space-constrained applications.

In conclusion, the SMDJ51A-HR transient voltage suppressor diode offers effective protection against voltage transients, making it a crucial component in safeguarding sensitive electronic devices across various industries.

Word Count: 470

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SMDJ51A-HR v technických řešeních

  1. What is the maximum reverse voltage of SMDJ51A-HR?

    • The maximum reverse voltage of SMDJ51A-HR is 51V.

  2. What is the typical clamping voltage of SMDJ51A-HR?

    • The typical clamping voltage of SMDJ51A-HR is 82.4V at 10A.

  3. What is the peak pulse current capability of SMDJ51A-HR?

    • The peak pulse current capability of SMDJ51A-HR is 300A.

  4. What is the operating temperature range of SMDJ51A-HR?

    • The operating temperature range of SMDJ51A-HR is -55°C to +150°C.

  5. Is SMDJ51A-HR RoHS compliant?

    • Yes, SMDJ51A-HR is RoHS compliant.

  6. What are the typical applications for SMDJ51A-HR?

    • SMDJ51A-HR is commonly used in surge protection for sensitive electronics, such as in telecommunications equipment, industrial control systems, and power supplies.

  7. Does SMDJ51A-HR require a heat sink for proper operation?

    • It is recommended to use a heat sink for SMDJ51A-HR to ensure proper thermal management, especially in high-power or high-frequency applications.

  8. What is the package type of SMDJ51A-HR?

    • SMDJ51A-HR is available in a surface mount DO-214AB (SMC) package.

  9. Can SMDJ51A-HR be used for ESD protection?

    • Yes, SMDJ51A-HR can be used for electrostatic discharge (ESD) protection in various electronic circuits and systems.

  10. Are there any specific layout considerations when using SMDJ51A-HR in a PCB design?

    • It is important to minimize the length and impedance of the traces connecting SMDJ51A-HR to the circuit to reduce parasitic inductance and ensure effective transient suppression.