1N3346B

Single Zener Diodes Overview

The JAN1N3346B is a high-power 50 W Zener diode from the JEDEC registered 1N3305 through 1N3350B series, manufactured by Microchip Technology. It provides voltage regulation with a nominal Zener voltage of 150 V at a test current of 85 mA. The device features a maximum dynamic impedance of 75 Ohms and a maximum reverse current of 10 µA. It operates within a junction and storage temperature range of -65°C to +175°C, utilizing a DO-5 (DO-203AB) hexagonal stud package.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction with internal solder bond
• Inherently radiation hard design compliant with MIL-STD-750 Method 1020 for ESD insensitivity
• Standard polarity configuration connects the anode directly to the case

Single Zener Diodes Applications

• High power voltage regulation in military and aerospace systems
• Overvoltage protection circuits requiring robust thermal dissipation
• Reference voltage generation in harsh environmental conditions

Single Zener Diodes Procurement Notes

Verify the specific screening level required for your application, as this component is available in JAN, JANTX, and JANTXV qualifications per MIL-PRF-19500/358. Confirm that the standard anode-to-case polarity meets your circuit design requirements, or specify the R suffix if reverse polarity is necessary. Ensure mounting hardware supports the hexagonal stud interface for proper heat sinking.

Single Zener Diodes Selection Notes

Select this component when applications demand high power handling capabilities up to 50 watts with adequate heat sinking. The 150 V breakdown voltage suits medium-to-high voltage regulation tasks. Consider the DO-5 package size and weight constraints, as the unit weighs approximately 15 grams. Verify that the operating environment stays within the specified -65°C to +175°C temperature range for reliable performance.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes produced by Microchip Technology's Scottsdale Division. These devices are designed for rugged environments and offer broad voltage selection from 3.9 V to 200 V. The JAN prefix indicates compliance with military reliability standards, distinguishing it from commercial variants.

Single Zener Diodes Replacement Considerations

Direct substitutes include other parts within the 1N3305–1N3350B series or the equivalent 1N4549B–1N4556B series. Cross-reference with JAN, JANTX, or JANTXV qualified versions of the same base number for different screening levels.