SMCJ48A

The SMCJ48A is a part of Littelfuse Inc.'s series of transient voltage suppressor (TVS) diodes, specifically designed to protect sensitive electronic components from voltage spikes and transients. Here’s a detailed description of the SMCJ48A:

General Overview:

• Type: Transient Voltage Suppressor (TVS) Diode
• Package: The SMCJ48A is housed in a DO-214AB (SMC) package, which is a surface-mount device (SMD) that provides a compact footprint suitable for various applications.

Electrical Characteristics:

• Reverse Stand-Off Voltage (V_RWM): The SMCJ48A has a reverse stand-off voltage of 48 volts, which means it can withstand this voltage level without conducting.
• Clamping Voltage (V_C): When subjected to a transient voltage, the clamping voltage is typically around 76.5 volts, ensuring that the voltage across the protected device does not exceed this level during a surge.
• Peak Power Dissipation: The device can handle peak power dissipation of up to 600 watts for a duration of 1 ms, making it suitable for protecting against high-energy transients.
• Breakdown Voltage: The breakdown voltage is specified at a range of 53.3 to 59.0 volts, ensuring that the device activates at the appropriate voltage levels to protect downstream components.

Features:

• Bidirectional Protection: The SMCJ48A is designed to provide bidirectional protection, meaning it can clamp voltage spikes in both positive and negative directions, making it versatile for AC and DC applications.
• Low Leakage Current: The device exhibits low leakage current, which is crucial for maintaining the efficiency of the circuit and preventing unnecessary power loss.
• Fast Response Time: The SMCJ48A has a fast response time, allowing it to react quickly to voltage transients, thereby minimizing the risk of damage to sensitive components.

Applications:

• Consumer Electronics: Commonly used in devices such as smartphones, tablets, and laptops to protect against ESD (electrostatic discharge) and other voltage transients.
• Telecommunications: Employed in communication equipment to safeguard against voltage spikes that can occur in data lines.
• Industrial Equipment: Utilized in various industrial applications where voltage transients can occur due to switching operations or lightning strikes.

Mechanical Characteristics:

• Dimensions: The SMCJ48A typically measures approximately 5.2 mm in height and 10.2 mm in length, with a width of about 4.6 mm, making it suitable for space-constrained designs.
• Material: The device is constructed from silicon, which is standard for semiconductor components, and is encapsulated in a robust plastic housing that provides environmental protection.

Compliance and Standards:

• The SMCJ48A complies with various industry standards, ensuring reliability and performance in critical applications. It is often RoHS compliant, indicating that it is free from hazardous substances.

In summary, the SMCJ48A from Littelfuse Inc. is a reliable and efficient transient voltage suppressor designed to protect electronic circuits from damaging voltage spikes, making it an essential component in a wide range of electronic applications.