The SM8S22A-1/2D is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay. It's designed to protect electronic equipment from voltage transients caused by inductive load switching, lightning strikes, and other transient voltage events. This device is particularly well-suited for automotive and industrial applications requiring high reliability and surge protection.

Applications

• Automotive Electronics (ECU Protection)
• Industrial Automation Equipment
• Power Supplies
• Telecommunications Systems
• Motor Control Circuits

Features

• Unidirectional Configuration
• 22 V Standoff Voltage
• High Surge Capability: 6600 W Peak Pulse Power (10/1000 μs waveform)
• Excellent Clamping Capability
• Low Incremental Surge Resistance
• Low Leakage Current
• AEC-Q101 Qualified for Automotive Applications
• RoHS Compliant

Benefits

• Robust Transient Protection: Effectively clamps voltage transients, protecting sensitive components from damage and ensuring system reliability.
• High Surge Immunity: Withstands high surge currents, providing robust protection against transient events.
• Automotive Grade Reliability: AEC-Q101 qualification assures high reliability in demanding automotive environments.
• Reduced Power Consumption: Low leakage current minimizes power losses during normal operation.
• Environmentally Compliant: RoHS compliance ensures adherence to environmental regulations.

Additional Details

The SM8S22A-1/2D operates by providing a low-impedance path to ground when the voltage exceeds the standoff voltage, thereby clamping the voltage to a safe level. The '/2D' suffix specifies tape and reel packaging for automated assembly. The '-1' likely refers to a specific internal construction or test parameter.

Key Specifications:

• Polarity: Unidirectional
• Reverse Standoff Voltage (Vrwm): 22 V
• Breakdown Voltage (Vbr): 24.4 V to 26.9 V
• Clamping Voltage (Vc) @ Ippm: 35.8 V
• Peak Pulse Current (Ippm) @ 10/1000 μs: 18.5 A
• Operating Temperature Range: -65 °C to +175 °C
• Package: DO-220AA (SM8S)

This TVS diode is designed for applications where reliable protection against voltage transients is critical, such as in automotive electronic control units (ECUs) and industrial control systems.