1KSMB6.8CA Littelfuse TVS DIODE 5.8V 10.5V DO214AA

The 1KSMB6.8CA is a TVS (Transient Voltage Suppression) diode manufactured by Littelfuse. Here are the key specifications and details about this component:


  • Manufacturer: Littelfuse
  • Part Number: 1KSMB6.8CA
  • Type: TVS Diode
  • Standoff Voltage: 5.8V
  • Clamping Voltage: 10.5V
  • Package Type: DO-214AA (SMB)
  • DataSheet 1KSMB6.8CA PDF

Key Features:

  1. TVS Diode: TVS diodes are designed to protect electronic components from voltage spikes and transient events by diverting excess current away from sensitive parts of a circuit.

  2. Standoff Voltage: The 5.8V standoff voltage indicates the voltage at which the diode starts to conduct during a transient event.

  3. Clamping Voltage: The 10.5V clamping voltage represents the voltage at which the diode limits the transient voltage to protect downstream components.

  4. Package Type (DO-214AA): The DO-214AA package (also known as SMB) is a surface-mount package with two leads, commonly used in electronic circuits where space is limited.

Main Specifications and Uses:

  • Transient Voltage Suppression: TVS diodes like the 1KSMB6.8CA are often used to protect sensitive electronics from voltage spikes caused by events like lightning strikes, electrostatic discharge (ESD), or power surges.

  • Voltage Clamping: They operate by clamping the transient voltage to a safe level to prevent damage to the protected circuitry.

  • Reverse Standoff Voltage: The standoff voltage determines the point at which the diode starts to conduct, providing protection against voltage transients.

Working Principle:

  • During normal operation, the TVS diode has a high impedance, allowing the circuit to function without interference.
  • When a transient voltage event occurs, such as a surge or spike, the diode rapidly switches into a low-impedance state, diverting excess current away from sensitive components.

Benefits and Applications:

  • ESD Protection: TVS diodes are commonly used for Electrostatic Discharge (ESD) protection on sensitive integrated circuits and ports.

  • Power Surge Protection: Used in power lines, communication lines, and other interfaces to protect against voltage surges.

  • Signal Line Protection: Implemented on signal lines to safeguard data and communication circuits.

  • Compact Design: The SMB package makes it suitable for applications with limited space on the PCB.


  • Correct Polarity: Ensure the TVS diode is installed with the correct polarity to effectively protect your circuit from transient events.

  • Placement: Position the TVS diode close to the input or output ports that require protection for optimal performance.

  • Integration: Incorporate the TVS diode into your circuit design based on the specific transient protection requirements of your application.

Before integrating the 1KSMB6.8CA TVS diode into your electronic circuit design, consult Littelfuse's datasheet and guidelines to understand its characteristics, application notes, and recommended usage in providing transient voltage protection for your electronics.

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