1N3350A

Single Zener Diodes Overview

The Microchip Technology 1N3350B is a high-power 50 W Zener diode designed for voltage regulation within the 1N3305 through 1N3350B series. It provides a nominal Zener voltage of 200 V with a test current of 65 mA and a maximum reverse current of 10 µA at 200 V. The device operates in a junction temperature range of -65°C to +175°C and dissipates up to 50 watts when mounted on a heat sink maintained below 75°C. It utilizes a DO-5 (DO-203AB) hermetically sealed metal and glass package featuring an 11/16 inch hexagonal stud.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction using internal solder bond technology
• Inherently radiation hard design compliant with MIL-STD-750 Method 1020
• Standard polarity configuration connects the anode directly to the case
• Reverse polarity option available by adding an R suffix to the part number

Single Zener Diodes Applications

• Voltage regulation across broad operating current and temperature ranges
• High power dissipation applications requiring adequate mounting and heat sinking
• Military qualification screening under MIL-PRF-19500/358 standards

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required tolerance level, as the B suffix indicates a +/- 5% Zener voltage tolerance. Confirm whether standard or reversed polarity is needed, noting that the R suffix denotes cathode-to-case orientation. Ensure the procurement documentation references the correct JEDEC registration numbers for the 1N3305 through 1N3350B series to guarantee component authenticity and specification compliance.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust voltage regulation in harsh environments due to its radiation hardness and hermetic sealing. Consider the thermal resistance characteristics, which specify a maximum of 2.0 °C/W from junction to the hexagonal base. Evaluate the need for military-grade screening if the application demands JAN, JANTX, or JANTXV qualifications, which are achieved by applying specific prefixes to the base part number.

Single Zener Diodes Part Context

This component belongs to the Microsemi Scottsdale Division product line, specifically the 1N3305 through 1N3350B series of 50 Watt Zener diodes. These devices are JEDEC registered and share mechanical packaging features with the 1N4549B through 1N4556B series. The manufacturer offers surface mount equivalents upon request and supports various tolerance levels through specific alphanumeric suffixes added to the base model designation.

Single Zener Diodes Replacement Considerations

Direct substitutes include other parts within the 1N3305 through 1N3350B series offering different voltage ratings but identical power and package specifications. Military variants such as JANTX1N3350B provide enhanced screening levels. Surface mount equivalents are available upon consultation with the factory.