The SMAJ28HE3-63 is a surface-mount Transient Voltage Suppressor (TVS) diode manufactured by Vishay. This component is designed to safeguard sensitive electronic devices from voltage surges caused by events like lightning strikes, ESD (Electrostatic Discharge), and inductive load switching. Housed in a compact SMA (Surface Mount Assembly) package, it's well-suited for automated assembly and high-density PCB layouts. The SMAJ28HE3-63 is a bi-directional TVS diode, meaning it offers protection against both positive and negative voltage transients.

Applications

• Protection of I/O interfaces
• Voltage clamping for sensitive circuits
• Data line surge protection
• Microcontroller and microprocessor protection
• Consumer electronics
• Industrial equipment

Features

• Bi-directional TVS diode
• Surface mount SMA package
• Glass passivated junction
• Excellent clamping capability
• Low incremental surge resistance
• Fast response time
• Meets MSL level 1, per J-STD-020, LF maximum peak of 260 °C
• Halogen-free according to IEC 61249-2-21 definition

Benefits

• Reliable protection against voltage transients in both positive and negative directions.
• Compact SMA package saves valuable PCB space.
• Fast response time ensures effective clamping of transient voltages, preventing damage to protected components.
• Glass passivated junction provides high reliability and stability under demanding operating conditions.
• Compliant with RoHS standards and halogen-free for environmentally conscious designs.

Additional Details

The SMAJ28HE3-63 has a standoff voltage of 28V. Its breakdown voltage ranges from 31.1V to 34.4V. The clamping voltage is 45.4V at a peak pulse current of 8.8A. The peak pulse power is rated at 400W for a 10/1000 μs waveform. It operates over a temperature range of -65°C to +150°C. The "E3" suffix indicates that it's an AEC-Q101 qualified component for automotive applications.