1N3343B

Single Zener Diodes Overview

The Microchip Technology 1N3343B 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 120 V at a test current of 100 mA. The device features a maximum dynamic impedance of 40 Ohms and a maximum reverse current of 10 µA. It operates within a junction temperature range of -65°C to +175°C and utilizes a DO-5 (DO-203AB) package with an internal solder bond construction.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond design ensuring robust mechanical integrity
• Inherently radiation hard characteristics suitable for harsh environments
• ESD nonsensitive performance verified per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• High power voltage regulation circuits
• Radiation-hardened electronic systems
• Industrial equipment requiring stable reference voltages

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as the datasheet references Microsemi Scottsdale Division while the brand is listed as Microchip Technology. Confirm that the DO-5 package dimensions and polarity match your mounting requirements. Ensure thermal management solutions are adequate for the 50 W dissipation rating at case temperatures below 75°C.

Single Zener Diodes Selection Notes

Select this component when a 120 V regulation point is required in a high-power application. The B suffix indicates a standard 5% voltage tolerance. Consider the reverse polarity option if the cathode-to-case connection is necessary for your chassis grounding scheme. Verify compatibility with existing heat sinking infrastructure due to the stud mount configuration.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 W Zener diodes. These components are designed for applications demanding high power handling capabilities and reliable voltage regulation over a broad operating current and temperature range. The series offers various voltage options from 3.9 V to 200 V.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 50 W Zener diodes with a 120 V nominal voltage and compatible DO-5 packaging. Verify that any substitute meets the same thermal resistance and hermetic sealing specifications.