1N3338B

Single Zener Diodes Overview

The Microchip Technology 1N3338B is a high-power 50 W Zener diode from the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 75 V at a test current of 170 mA. The device features a maximum dynamic impedance of 9.0 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, it offers standard polarity with an anode-to-case connection and maintains a thermal resistance of 2.0°C/W maximum.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction for environmental durability
• Internal solder bond design ensuring mechanical stability
• Radiation hard characteristics suitable for harsh environments
• Low thermal resistance enabling effective heat dissipation

Single Zener Diodes Applications

• High power voltage regulation circuits
• Industrial equipment requiring robust protection
• Military and aerospace systems utilizing MIL-PRF-19500/358 qualified variants

Single Zener Diodes Procurement Notes

Verify the specific part number against the official datasheet to confirm tolerance suffixes and polarity options. Ensure that mounting hardware requirements align with the hexagonal stud specifications. Confirm thermal management strategies meet the 50 W dissipation limits at specified case temperatures. Check for available military qualifications if required by system specifications.

Single Zener Diodes Selection Notes

Select this component for applications demanding high power handling and precise voltage regulation. The 75 V nominal rating fits specific mid-range Zener requirements. Consider the DO-5 package size for board space constraints. Evaluate thermal derating curves for operation above 75°C case temperature. Verify compatibility with existing circuit designs regarding reverse leakage and impedance characteristics.

Single Zener Diodes Part Context

This component belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 W Zener diodes. These devices are designed for broad voltage regulation needs ranging from 3.9 V to 200 V. The series includes both standard and military-qualified versions, offering flexibility for various industrial and defense applications requiring reliable high-power performance.

Single Zener Diodes Replacement Considerations

Consult factory for surface mount equivalents or alternative part numbers within the same series. Verify electrical parameters such as Zener voltage and impedance when substituting. Ensure mechanical fitment matches the DO-5 package dimensions. Confirm thermal performance capabilities match the original design requirements.