1N3348A

Single Zener Diodes Overview

The Microchip Technology 1N3348A is a high-power 50 W Zener diode belonging to the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 160 V at a test current of 80 mA. The device features a maximum dynamic impedance of 80 Ohms and a maximum reverse current of 10 µA. It operates within a junction and storage temperature range of -65°C to +175°C, dissipating up to 50 watts at a case temperature below 75°C.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond construction ensuring reliable electrical connections
• Standard polarity configuration with anode connected to the case
• Inherently radiation hard design suitable for harsh environments

Single Zener Diodes Applications

• High power voltage regulation circuits
• Industrial control systems requiring robust components
• Military applications utilizing JAN or JANTX qualifications

Single Zener Diodes Procurement Notes

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

Single Zener Diodes Selection Notes

Select this component when high power handling and radiation hardness are critical requirements. The DO-5 package allows for direct stud mounting, simplifying thermal management in high-current applications. Consider the +/- 5% tolerance of the B suffix version for tighter voltage regulation needs compared to standard A or unmarked variants.

Single Zener Diodes Part Context

This part is part of the Microsemi Scottsdale Division's high-power Zener diode lineup, now under Microchip Technology. The series covers a broad voltage range from 3.9 V to 200 V, offering standardized JEDEC registration for interchangeability. These devices are designed for demanding environments where reliability and thermal performance are paramount.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 160 V, 50 W Zener diodes in the DO-5 package. Verify thermal resistance and maximum current ratings match the original design specifications before substitution.