1N3331B

Single Zener Diodes Overview

The Microchip Technology 1N3331B 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 50 V at a test current of 250 mA. The device features a maximum dynamic impedance of 5.00 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
• Standard polarity configuration with anode connected to the case
• Inherently radiation hard characteristics suitable for harsh environments

Single Zener Diodes Applications

• High power voltage regulation circuits
• Military and aerospace electronic systems
• Industrial equipment requiring robust protection

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements, as the 'B' suffix denotes a +/- 5% tolerance on the Zener voltage. Confirm that the standard polarity (anode to case) aligns with your circuit design, or specify the 'R' suffix if reverse polarity is required. Ensure adequate heat sinking is planned to maintain the case temperature below 75°C for full 50 W dissipation capability.

Single Zener Diodes Selection Notes

Select this component when a high-power discrete Zener solution is needed for voltage reference or clamping applications. The DO-5 stud mount package facilitates direct thermal coupling to chassis heatsinks. Consider the +/- 5% tolerance and the specific test current requirements when designing the biasing network to ensure stable operation across the intended temperature range.

Single Zener Diodes Part Context

This part belongs to the Microsemi Scottsdale Division 1N3305 thru 1N3350B series of 50 Watt Zener diodes. These devices are designed for applications requiring broad voltage selection from 3.9 V to 200 V. The series is also available in JAN, JANTX, and JANTXV military qualifications per MIL-PRF-19500/358 by adding the appropriate prefixes to the part number.

Single Zener Diodes Replacement Considerations

Consult the manufacturer for surface mount equivalents if board space constraints require a different form factor. Verify compatibility with existing mounting hardware, as the DO-5 package requires specific insulators, bushings, or washers depending on the application environment.

Single Zener Diodes FAQ

What does the 'B' suffix indicate for the 1N3331B?

The 'B' suffix indicates a standard voltage tolerance of +/- 5% on the Zener voltage.

How is the polarity defined for this component?

The standard polarity connects the anode to the case. A reversed polarity (cathode to case) is indicated by adding an 'R' suffix to the part number.