1N3346RB

Single Zener Diodes Overview

The Microchip Technology 1N3346RB 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 150 V at a test current of 85 mA and a maximum dynamic impedance of 75 Ohms. The device features reverse polarity, indicated by the 'R' suffix, connecting the cathode to the case. It operates within a junction temperature range of -65°C to +175°C and utilizes a hermetically sealed DO-5 (DO-203AB) package with an 11/16 inch hexagonal stud.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond design ensuring robust electrical connections
• Reverse polarity configuration with cathode connected to the case
• Inherently radiation hard per Microsemi MicroNote 050

Single Zener Diodes Applications

• High power voltage regulation in harsh environments
• Military and aerospace electronic systems requiring MIL-PRF-19500/358 qualification
• Circuits demanding inherent radiation hardness

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm the exact tolerance level and screening requirements. Confirm that the required military qualification prefix (JAN, JANTX, or JANTXV) is included if applicable. Ensure the reverse polarity designation matches the intended circuit topology before finalizing the purchase order.

Single Zener Diodes Selection Notes

Select this component when a 150 V breakdown voltage with a 5% tolerance is required in a high-power application. The reverse polarity option is suitable for designs where the cathode must be electrically tied to the mounting chassis. Verify thermal management capabilities to maintain the junction temperature within the specified -65°C to +175°C operating range during operation.

Single Zener Diodes Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microchip Technology's Scottsdale Division. These devices are designed for broad voltage regulation applications ranging from 3.9 V to 200 V. The series offers various tolerance options and military qualifications to meet stringent reliability standards for specialized industrial and defense electronics.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N3346B, JANTX1N3346B, and JANTXV1N3346B, which share identical electrical characteristics but differ in manufacturing screening levels according to MIL-PRF-19500/358.