The SMBJ400CA is a transient voltage suppression (TVS) diode from Littelfuse, 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 with a compact SMB (DO-214AA) package, making it suitable for high-density circuit board applications. This TVS diode provides bidirectional protection, clamping voltage spikes to a safe level, thereby preventing damage to downstream components.

Applications

• Protection of I/O Interfaces
• Protection of VCC Bus
• Industrial Equipment
• Telecom Equipment
• Consumer Electronics
• Surge Protection
• ESD Protection

Features

• Bidirectional TVS Diode
• Stand-off Voltage (VRWM): 400 V
• Breakdown Voltage (VBR): 444 V to 492 V
• Clamping Voltage (VC): 648 V
• Peak Pulse Power (PPPM): 600 W
• Low Incremental Surge Resistance
• Excellent Clamping Capability
• Typical IR less than 1 μA above VRWM
• Meets MSL Level 1, per J-STD-020
• Lead (Pb)-free and RoHS compliant
• Operating Temperature: -55°C to +150°C

Benefits

• Effective Transient Protection: Clamps voltage spikes quickly and effectively, protecting sensitive components from damage.
• Bidirectional Capability: Provides protection against both positive and negative voltage transients.
• High Surge Capability: Withstands high surge currents without degradation.
• Compact Size: SMB package allows for use in space-constrained applications.
• Low Leakage Current: Minimizes power loss during normal operation.
• High Reliability: Robust design ensures reliable performance in harsh environments.
• Environmentally Friendly: Lead-free and RoHS compliant, meeting environmental regulations.

Additional Details

The SMBJ400CA is designed to respond rapidly to transient voltage events, diverting excess current away from protected components. Its low incremental surge resistance minimizes the voltage overshoot during clamping, providing enhanced protection. The device is suitable for protecting various electronic circuits, including data lines, power supplies, and control lines. The SMB package offers excellent thermal performance, allowing for efficient heat dissipation. The SMBJ400CA is an ideal solution for ensuring the reliability and longevity of electronic equipment exposed to high voltage transients, specifically for applications requiring a stand-off voltage of 400V.