BAY71

Overview

The BAY71 is a small signal diode manufactured by Fairchild Semiconductor, now part of onsemi. It features an ISOPLANAR™ structure within a DO-35 glass package. Key electrical specifications include a maximum repetitive reverse voltage (VRRM) of 50 V and an average rectified forward current (IF(AV)) of 200 mA. The device supports a non-repetitive peak forward surge current of 1.0 A for 1.0 second pulses. Electrical characteristics specify a maximum forward voltage of 0.76 V at 20 mA and a reverse leakage current of 100 nA at 35 V. The component exhibits a reverse recovery time of 4 ns and operates with a maximum junction temperature of 175 °C.

Feature Summary

• Utilizes ISOPLANAR™ monolithic construction for enhanced reliability and performance
• Provides low capacitance suitable for high-speed switching applications
• Features fast reverse recovery characteristics for efficient signal processing

Applications

• General purpose rectification in low-power circuits
• High-speed switching applications requiring fast response times
• Clamping and protection circuits in consumer electronics

Procurement Notes

Verify the manufacturer status as Fairchild Semiconductor products are integrated into onsemi. Confirm the specific revision level (Rev. A) matches design requirements. Ensure the DO-35 package type aligns with PCB footprint constraints. Check for RoHS compliance if required by project specifications. Validate that the 50 V rating meets the circuit's peak inverse voltage demands.

Selection Notes

Select this component for applications requiring a compact, high-reliability small signal diode. The 50 V reverse voltage rating suits low-voltage logic and power supply lines. Consider the 200 mA average current limit when designing load paths. The DO-35 package offers through-hole mounting options. Evaluate thermal resistance requirements for ambient operating conditions to ensure junction temperatures remain within safe limits during operation.

Part Context

The BAY71 belongs to the small signal diode category, designed for general-purpose electronic applications. Manufactured originally by Fairchild Semiconductor, it represents a standard discrete semiconductor component used in various analog and digital circuits. The DO-35 glass encapsulation provides environmental protection while maintaining small physical dimensions. This component serves as a fundamental building block for signal conditioning and power management tasks in consumer and industrial equipment.

Replacement Considerations

Consult official cross-reference lists from onsemi or authorized distributors for verified substitutes. Ensure replacement parts match the DO-35 package and 50 V/200 mA ratings. Verify that alternative components maintain similar reverse recovery times and forward voltage characteristics for circuit compatibility.