The SMBJ78CA is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed to protect sensitive electronic equipment from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). This particular model is a bidirectional TVS diode.

Applications

• Protection of sensitive electronic equipment
• I/O interfaces
• AC and DC power lines
• Signal lines
• Microcontroller protection
• Industrial control systems
• Telecom equipment

Features

• Bidirectional TVS diode
• Surface Mount SMB package
• Glass passivated junction
• Excellent clamping capability
• Low incremental surge resistance
• Typical IR less than 1 μA above 10V
• Fast response time: typically less than 1.0 ps from 0 Volts to BV min
• IEC 61000-4-2 ESD 15kV(Air), 8kV (Contact)
• RoHS compliant

Benefits

• Provides robust protection against transient voltage events, enhancing system reliability.
• Bidirectional protection allows for flexibility in circuit design.
• Compact SMB package saves board space.
• Fast response time ensures effective clamping of transient voltages.
• Low leakage current minimizes power consumption.
• Meets industry standards for ESD protection.

Additional Details

The SMBJ78CA has a standoff voltage of 78V and a peak pulse power of 600W. Its bidirectional capability means it provides protection against both positive and negative transient voltages. The glass-passivated junction ensures high reliability and stability under demanding operating conditions. The clamping voltage is a crucial parameter, defining the maximum voltage the TVS diode will allow to pass through to the protected circuit during a surge event.

Littelfuse is a recognized leader in circuit protection, and the SMBJ78CA reflects their commitment to quality and performance. Its robust design and comprehensive protection features make it a popular choice for safeguarding sensitive electronics across a wide range of applications.