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Product Detailed Parameters
- Description：DIODE STANDARD 270V 400MA DIE
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：270 V
- Current - Average Rectified (Io)：400mA
- Voltage - Forward (Vf) (Max) @ If：-
- Speed：Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：50 µA @ 225 V
- Capacitance @ Vr, F：-
- Mounting Type：Surface Mount
- Package / Case：Die
- Supplier Device Package：Die
- Operating Temperature - Junction：-65°C ~ 175°C
- Grade：-
- Qualification：-
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Overview
The CD645B is a general-purpose silicon diode manufactured by Microchip Technology, designed for surface-mount applications in a die form factor. It features a maximum DC reverse voltage of 270 V and an average rectified current rating of 400 mA. The device operates within a junction temperature range of -65°C to +175°C. Electrical characteristics include a forward voltage of 1 V at 100 mA, a reverse leakage current of 50 nA at 225 V, and a capacitance of 20 pF at 4 V and 1 MHz. All junctions are protected with silicon dioxide.
Feature Summary
- Junctions completely protected with silicon dioxide
- Compatible with wire bonding and die attach techniques
- General-purpose silicon construction
Applications
- General purpose rectification
- Computer diode circuits
- Signal processing applications
Procurement Notes
Verify the specific package configuration, as the CD645B is identified as a die component requiring specialized mounting. Confirm compatibility with existing wire bonding and die attach processes, noting that solder reflow techniques are not supported. Ensure design specifications align with the 270 V reverse voltage and 400 mA current ratings before integration into the final assembly.
Selection Notes
Select this component for applications requiring high-temperature operation up to 175°C and robust junction protection. The die format necessitates careful consideration of mechanical handling and attachment methods. Verify that the circuit design accommodates the specific forward voltage drop and reverse leakage characteristics under operating conditions.
Part Context
The CD645B belongs to Microchip's family of general-purpose silicon diodes, which includes variants such as CD483B, CD485B, and CD486B. These components share common design features like silicon dioxide junction protection and compatibility with standard wire bonding processes. The series is intended for reliable performance in demanding electronic environments.
Replacement Considerations
Direct substitutes within the same Microchip family include CD483B, CD485B, and CD486B. Verify electrical parameters such as reverse voltage and current ratings against these alternatives to ensure functional equivalence in the specific application context.
