BAR43 – STMicroelectronics

Overview

The onsemi BAR43 is a high-performance silicon Schottky diode designed for low-power rectification and signal switching applications. Its critical operational characteristic is the exceptionally low forward voltage (Vf) of 800 mV at 200 mA, which minimizes power dissipation in forward-biased states. A key design consideration for engineers is managing the trade-off between this low Vf and the relatively low repetitive reverse voltage rating (Vrrm) of 30 V; exceeding this can lead to increased leakage current (Ir) and potential device failure, necessitating careful circuit design for voltage clamping or transient suppression.

Key Features

• Forward Current (If): 200 mA
• Repetitive Reverse Voltage (Vrrm): 30 V
• Forward Voltage (Vf): 800 mV @ 200 mA
• Forward Surge Current (Ifsm): 750 mA
• Reverse Current (Ir): 500 nA @ 30 V
• Package: SOT-23-3 (2.92 mm x 1.3 mm x 0.93 mm)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Low-voltage power supply rectification in portable electronics
• Reverse polarity protection in battery-powered devices
• Signal demodulation in low-frequency communication circuits
• High-speed switching in logic level translation