SMBJ30A

The SMBJ30A is a type of transient voltage suppressor (TVS) diode, specifically designed to protect sensitive electronic components from voltage spikes and transients. Manufactured by FTR (or similar companies), this component is widely used in various applications, including telecommunications, automotive electronics, and consumer electronics.

Physical Characteristics:

• Package Type: The SMBJ30A typically comes in a surface-mount package, often in a DO-214AA (SMB) form factor. This package is compact, allowing for efficient use of space on printed circuit boards (PCBs).
• Dimensions: The SMB package usually measures approximately 5.2 mm in length, 3.5 mm in width, and 1.5 mm in height, making it suitable for high-density applications.
• Material: The body of the diode is usually made from a durable epoxy resin, which provides protection against environmental factors and mechanical stress.

Electrical Characteristics:

• Reverse Stand-Off Voltage (V_RWM): The SMBJ30A has a reverse stand-off voltage of 30 volts, which means it can withstand this voltage level without conducting.
• Clamping Voltage (V_C): When a transient voltage occurs, the clamping voltage is the maximum voltage that the diode will allow to pass through. For the SMBJ30A, this is typically around 45 volts at a specified peak pulse current.
• Peak Pulse Power (P_PP): The device can handle a peak pulse power of around 600 watts, making it effective for protecting against high-energy transients.
• Operating Temperature Range: The SMBJ30A is designed to operate within a temperature range of -55°C to +150°C, ensuring reliability in various environmental conditions.

Performance Features:

• Fast Response Time: The SMBJ30A is designed to respond quickly to voltage spikes, providing immediate protection to connected components.
• Low Leakage Current: Under normal operating conditions, the leakage current is minimal, which helps in maintaining the efficiency of the circuit.
• Bidirectional Protection: This diode can clamp both positive and negative transients, making it versatile for AC and DC applications.

Applications:

• Telecommunications: Used in phone lines and data lines to protect against lightning strikes and other voltage surges.
• Automotive: Protects sensitive electronic systems in vehicles from voltage spikes caused by inductive loads or electrical faults.
• Consumer Electronics: Commonly found in devices like televisions, computers, and home appliances to safeguard against power surges.

Conclusion:

The SMBJ30A from FTR is a robust and reliable transient voltage suppressor diode, ideal for protecting sensitive electronic components from voltage transients. Its compact size, high power handling capability, and fast response time make it a popular choice in various electronic applications.