1N3305BT1

Overview

The Microchip Technology 1N3305BT1 is a high-power 50 W Zener diode from the JEDEC registered 1N3305 series. It provides voltage regulation with a nominal Zener voltage of 6.8 V at a test current of 1,850 mA. The device features a maximum dynamic impedance of 0.20 Ohms and operates within a junction temperature range of -65°C to +175°C. Packaged in a hermetically sealed DO-5 (DO-203AB) metal and glass case with an 11/16 inch hexagonal stud, it supports DC power dissipation up to 50 watts at a case temperature below 75°C.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond design ensuring mechanical stability
• Standard polarity configuration with anode connected to the case
• Radiation hard characteristics suitable for harsh environments

Applications

• High power voltage regulation circuits
• Military and aerospace electronic systems
• Harsh environment power supplies

Procurement Notes

Verify the specific suffix 'T1' against official manufacturer documentation, as standard datasheets list the base part number without this tape-and-reel indicator. Confirm that the requested quantity matches the available packaging format, which may differ from bulk tray options. Ensure compatibility with the required military qualification levels if applicable.

Selection Notes

Select this component for applications requiring robust 50 W power handling and wide operating temperature ranges. The DO-5 package facilitates direct mounting to heat sinks via the hexagonal stud. Consider the thermal resistance specifications when designing the cooling system to maintain junction temperatures within safe limits during continuous operation.

Part Context

This component belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These devices are designed for broad voltage regulation needs ranging from 3.9 V to 200 V. The series includes variants with different voltage tolerances and optional reverse polarity configurations to meet diverse circuit requirements.

Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with a 6.8 V rating. Verify that replacement components match the thermal resistance and maximum current specifications. Military qualified equivalents such as JAN or JANTX versions may be available for specific screening requirements.