The SMBJ20A is a Transient Voltage Suppressor (TVS) diode manufactured by Fairchild/ON Semiconductor. It is designed to protect sensitive electronic components from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). This device is part of the SMBJ series, which is known for its compact size and high surge capability.

Applications:

• I/O Port Protection
• VCC Bus Protection
• Data Line Protection
• Microprocessor Protection
• Protection of sensitive circuits against ESD and EFT

Features:

• Unidirectional TVS Diode
• Surface Mount SMB package
• Low profile
• Glass passivated junction
• Excellent clamping capability
• High surge capability: 600 W peak pulse power (tp = 10/1000 μs)
• Low incremental surge resistance
• Meets MSL level 1, per J-STD-020, LF maximum peak of 260 °C

Benefits:

• Effective protection against transient overvoltages, ensuring system reliability.
• Reduces component failure rates and associated maintenance costs.
• Compact size allows for use in densely populated circuit boards.
• Fast response time to transient events.
• Compliant with industry standards for surge protection.

Additional Details:

The SMBJ20A has a standoff voltage of 20V, indicating the maximum voltage it can withstand without conducting. It has a breakdown voltage typically higher than the standoff voltage. This TVS diode is available in a SMB (DO-214AA) package. Operating temperature ranges from -65°C to +150°C. The unidirectional configuration means it primarily protects against positive voltage transients. Fairchild/ON Semiconductor's SMBJ20A is engineered to provide robust protection in a variety of applications where transient voltage surges are a concern.