The SMAJ48HE3/5A is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay. It is designed to protect sensitive electronic components from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). It is a surface mount device in a DO-214AC (SMA) package.

Applications

• I/O Ports
• VCC bus protection
• Data line protection
• Microprocessor protection
• Voltage suppression in sensitive electronic equipment

Features

• Glass passivated junction
• Available in unidirectional polarity only
• Excellent clamping capability
• Low incremental surge resistance
• Typical IR less than 1 μA above 10 V
• AEC-Q101 qualified available
• UL Recognized File # E187329
• Compliant to RoHS directive 2011/65/EU and in accordance to WEEE 2002/96/EC

Benefits

• Provides robust overvoltage protection for sensitive electronic circuits.
• Enhances the reliability of electronic systems by preventing damage from transient voltage events.
• Excellent clamping capability ensures a low clamping voltage, protecting downstream components.
• The device's compact size makes it suitable for space-constrained applications.
• Reduces downtime and repair costs associated with voltage-related failures.

Additional Details

The SMAJ48HE3/5A features a standoff voltage of 48V. It offers a peak pulse power dissipation of 400 W at 10/1000 μs waveform. The diode has a fast response time, effectively clamping transient voltages. The operating junction temperature range is -55 °C to +150 °C. It exhibits a low reverse leakage current, typically less than 1 μA above 10 V. The device meets MSL level 1, per J-STD-020, LF maximum peak of 260 °C. It's RoHS compliant, demonstrating adherence to environmental regulations. The maximum clamping voltage at peak pulse current is around 77.4 V. It is suitable for automotive applications due to its AEC-Q101 qualification.