1N3340RB

Single Zener Diodes Overview

The Microchip Technology 1N3340RB is a high-power 50 W Zener diode belonging to the 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 91 V and a tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features a maximum DC Zener current of 420 mA at a test current of 140 mA. It utilizes a DO-5 (DO-203AB) package with an 11/16 inch hexagonal stud for mounting.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction
• Internal solder bond design
• Reverse polarity configuration with cathode connected to case
• Inherently radiation hard

Single Zener Diodes Applications

• High power voltage regulation
• Military and aerospace electronic systems
• Harsh environment circuit protection

Single Zener Diodes Procurement Notes

Verify the specific part number against official datasheets to confirm the reverse polarity suffix 'R' and the B tolerance class. Confirm that the required thermal management meets the 50 W dissipation rating at the intended case temperature. Ensure compatibility with the DO-5 stud mount hardware specifications.

Single Zener Diodes Selection Notes

Select this component when a robust, hermetically sealed Zener diode is required for high-power applications. The reverse polarity variant is suitable for designs where the case must serve as the cathode terminal. Verify that the system can accommodate the DO-5 package dimensions and the necessary mechanical mounting hardware for the hexagonal stud.

Single Zener Diodes Part Context

This component is part of the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 W Zener diodes. These devices are registered with JEDEC and offer a broad selection of voltages from 3.9 V to 200 V. The series is designed for demanding environments, offering low thermal resistance and high power dissipation capabilities.

Single Zener Diodes Replacement Considerations

Equivalent parts include the standard 1N3340B for non-reversed polarity or other 1N33xxB series variants for different voltage ratings. Military qualified versions such as JANTX1N3340B or JANTXV1N3340B provide higher screening levels.