As automobiles evolve into highly interconnected intelligent terminals, in-vehicle infotainment systems are no longer merely music players, but core systems integrating navigation, communication, entertainment, and vehicle information.

However, in the complex automotive electrical environment, voltage surges, transient spikes, and electromagnetic interference can threaten system stability at any time. Therefore, selecting suitable transient voltage suppression devices is crucial for ensuring the reliable operation of automotive infotainment systems.

The SMAJ24CA TVS Diode is an ideal protection solution designed for such automotive applications.

What Is the SMAJ24CA TVS Diode?

  • The SMAJ24CA is a bidirectional transient voltage suppressor diode specifically designed to quickly conduct during transient overvoltage events, clamping the voltage within a safe range to protect sensitive downstream circuitry.
  • It is particularly suitable for 12V/24V automotive electronic systems and is widely used in in-vehicle infotainment systems for power line and signal interface protection.

Key Features of SMAJ24CA for Automotive Infotainment Systems

1️⃣ Reliable Voltage Protection

Reverse Working Voltage (Vrwm): 24V
Ensures the diode remains non-conductive under normal operating conditions, allowing the infotainment system to function smoothly without interference.

2️⃣ Breakdown Voltage (Vbr): 26.7V – 29.5V
Provides a controlled conduction range during transient overvoltage events, protecting sensitive components from spikes.

3️⃣ High Clamping Capability

Maximum Clamping Voltage (Vc): 38.9V
Limits the voltage during surge events to a safe level, safeguarding MCUs, audio processors, display drivers, and communication ICs from overvoltage damage.

4️⃣ Ultra-Low Leakage Current

Reverse Leakage Current (Ir): 1µA
Minimizes standby power consumption, ensuring efficient operation of the infotainment system while maintaining reliable protection.

5️⃣ Fast Response for Automotive Applications

Reacts within nanoseconds to transient voltage spikes, providing instant protection against surges from engine ignition, load switching, or external disturbances.

Typical Applications of SMAJ24CA in Automotive Infotainment Systems

🔸 Power Input Protection

    During vehicle start-up, engine ignition, or load switching, power lines are prone to surges and transient spikes.

    SMAJ24CA effectively absorbs these transient energies, preventing power malfunctions from damaging the system's core circuitry.

    🔸 Signal Line and Data Interface Protection

      Automotive infotainment systems typically include various communication interfaces, such as CAN, LIN, USB, and display interfaces.

      SMAJ24CA can suppress electromagnetic interference (EMI) and electrostatic discharge (ESD), ensuring stable signal transmission.

      🔸 Stable Operation in Complex Electromagnetic Environments

        In complex electromagnetic environments such as densely built-up urban areas, near high-voltage power lines, or during thunderstorms,

        SMAJ24CA can still operate stably, providing continuous and reliable protection for the infotainment system.

        Why Transient Voltage Protection Is Critical in Vehicles？

        During vehicle operation, the following situations can trigger transient overvoltages:

        • Engine ignition
        • Motor starting or stopping
        • Sudden load changes
        • External electromagnetic interference

        If these transient voltages are not suppressed in time, they may lead to:

        • Chip damage
        • System crashes or restarts
        • Display or audio malfunctions
        • Decreased overall system reliability

        The SMAJ24CA acts like a robust defense, suppressing transient voltages at the first sign of their occurrence and isolating the risks.

        SMAJ24CA Datasheet 👉 https://en.semiware.com/tvs-diodes/smaj24ca/

        Conclusion: Reliable Protection for Automotive Infotainment Systems with Semiware SMAJ24CA

        As automotive infotainment systems become increasingly complex and interconnected, the demand for robust and reliable circuit protection is also growing. Semiware's SMAJ24CA is designed to meet industry-standard electrical specifications and is a direct replacement for similar products from Littelfuse and Vishay.

        Explore our full range of transient voltage protection components 👉 https://en.semiware.com/product-line/tvs-diodes/