HY Electronic (Cayman) Limited

BAS21

BAS21 Description

The BAS21 is a high-performance general-purpose diode from HY Electronic (Cayman) Limited, designed for fast recovery and efficient rectification in low-power circuits. With a 250V reverse voltage (Vr) and 400mA average rectified current (Io), it offers robust performance in compact SOT-23 surface-mount packaging. The diode features a fast recovery time of ≤500ns (typical 50ns trr) and low forward voltage drop (1.25V @ 200mA), making it ideal for high-speed switching and energy-efficient designs. Its low reverse leakage (100nA @ 200V) and 5pF junction capacitance ensure minimal power loss and signal distortion, suitable for precision applications.

BAS21 Features

• Fast Recovery: ≤500ns recovery time, enabling high-frequency operation.
• Low Capacitance: 5pF @ 0V, 1MHz, reducing noise in RF and signal circuits.
• High Voltage Tolerance: 250V DC reverse voltage for robust protection.
• Compact & Reliable: SOT-23 package with MSL1 (Unlimited) moisture resistance.
• Low Power Loss: 1.25V forward voltage and 100nA leakage enhance efficiency.
• Wide Temperature Range: Operates up to 150°C junction temperature.
• RoHS3 Compliant: Meets environmental standards for modern electronics.

BAS21 Applications

The BAS21 excels in:

• Signal Demodulation & Clamping: Low capacitance ensures clean signal integrity.
• High-Speed Switching: Fast recovery suits DC-DC converters, snubber circuits, and flyback diodes.
• Protection Circuits: 250V Vr guards against voltage spikes in USB, HDMI, or sensor interfaces.
• Portable Electronics: Compact SOT-23 fits space-constrained designs like wearables and IoT devices.
• Automotive & Industrial Systems: 150°C rating supports harsh environments.

Conclusion of BAS21

The BAS21 stands out for its fast recovery, low leakage, and high-voltage resilience in a miniature package. Its balance of speed, efficiency, and reliability makes it a superior choice for high-frequency rectification, protection, and signal conditioning compared to slower standard diodes. Ideal for consumer electronics, automotive, and industrial systems, it combines performance with compliance (RoHS3, MSL1), ensuring versatility in modern circuit design.