1N3337B

Single Zener Diodes Overview

The Microchip Technology 1N3337B is a high-power 50 W Zener diode from the 1N3305-1N3350B series, housed in a hermetically sealed DO-5 (DO-203AB) metal and glass package with an 11/16 inch hexagonal stud. It provides a nominal Zener voltage of 68 V at a test current of 180 mA, with a maximum dynamic impedance of 8.0 Ohms at IZT and 140 Ohms at IZK = 5 mA. The device features a maximum DC Zener current of 600 mA and a reverse leakage current of 10 µA at its rated voltage. Operating temperatures range from -65°C to +175°C, with power derating applied above a case temperature of 75°C.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction for durability
• Internal solder bond design for reliability
• Standard polarity configuration with anode connected to the case
• Radiation hard characteristics suitable for harsh environments

Single Zener Diodes Applications

• High power voltage regulation circuits
• Industrial equipment requiring robust protection
• Aerospace and defense systems
• Harsh environment electronics

Single Zener Diodes Procurement Notes

Verify that the specific order matches the required tolerance suffix 'B' for 5% voltage accuracy. Confirm the standard polarity (anode to case) aligns with the circuit design, as reversed polarity requires an 'R' suffix. Ensure mounting hardware accommodates the 1/4-28 threaded hexagonal stud. Check thermal management requirements against the 50 W dissipation rating and derating curve.

Single Zener Diodes Selection Notes

Select this component when a 68 V reference or regulator is needed in a high-power application. The DO-5 package allows direct mounting to heatsinks via the hexagonal stud. Consider the positive temperature coefficient of 0.090 %/°C for thermal stability analysis. Verify that the 600 mA maximum DC current meets the load requirements without exceeding thermal limits.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi (now Microchip Technology). These devices are designed for applications requiring significant power handling capabilities within a ruggedized, hermetically sealed metal-glass package. The series covers a broad voltage range from 3.9 V to 200 V.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with a 68 V nominal voltage and 5% tolerance. Verify pinout compatibility, specifically the anode-to-case connection, before substitution.