Product Description

In modern electronic systems,surge protection is an important part of ensuring safe and stable operation of circuits.SMBJ18A is a common transient voltage suppressor diode,which is widely used in various sensitive electronic devices to protect against transient overvoltage caused by lightning strikes,electrostatic discharge (ESD),switching operations,etc.

Main Technical Parameters

  • Working voltage:18V
  • Breakdown voltage:20V-22.1V
  • Peak pulse current: up to 20.6A (8/20μs waveform)
  • Maximum clamping voltage:29.2V
  • Power level: 600W
  • Polarity: Uni-directional

Features and Advantages

  • Low profile package
  • Ideal for automated placement
  • 600 Watt peak pulse power capability with a 10/1000μs waveform
  • For surface mounted applicatons to optimize board space
  • Excellent clamping capability
  • Very fast response time
  • Low incremental surge resistance

Working Principle

  • Normal state
    When the circuit voltage is lower than the reverse cutoff voltage, the device is in high impedance state (cutoff state), which has almost no effect on the circuit.
  • Transient voltage trigger
    When the voltage exceeds the breakdown voltage, the device quickly enters the low impedance state (avalanche breakdown), discharges the excess energy to the ground through itself, and clamps the voltage below the clamping voltage.

Typical Applications

  • Power supply protection
  • Automotive application
  • Industrial application
  • Power management

Product Line

For datasheet and more details of SMBJ18A, please visit the website:

https://en.semiware.com/product-general-tvs/smbj18a

About Semiware
Semiware has a comprehensive product lineup of circuit protection device products. The company leverages its technology in the semiconductor field and application background in end products to serve customers in the electronics, automotive and industrial markets. For more information, please visit semiware official website: https://en.semiware.com/

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