1N3314RB

Overview

The Microchip Technology 1N3314RB is a high-power 50 W Zener diode from the 1N3305-1N3350B series. It provides voltage regulation with a nominal Zener voltage of 15 V at a test current of 830 mA and a maximum dynamic impedance of 1.4 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.

Feature Summary

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

Applications

• Voltage regulation in high power industrial systems
• Protection circuits requiring robust thermal performance
• Military and aerospace applications utilizing MIL-PRF-19500/358 qualifications

Procurement Notes

Verify the specific ordering suffixes against official documentation to confirm tolerance levels and polarity configurations. Ensure that mounting hardware requirements align with the hexagonal stud specifications. Confirm environmental compliance status and manufacturing origin details prior to procurement to meet project specifications.

Selection Notes

Select this component when high power dissipation up to 50 watts is required alongside strict voltage regulation needs. The reverse polarity option facilitates specific grounding schemes where the cathode must be electrically tied to the chassis. Verify thermal management capabilities to maintain junction temperatures within the specified operational limits during peak load conditions.

Part Context

This part belongs to the 1N3305 through 1N3350B series of high power Zener diodes manufactured by Microchip Technology's Scottsdale Division. These devices are designed for demanding environments and offer broad voltage selection ranging from 3.9 V to 200 V. The series supports various military qualification levels including JAN, JANTX, and JANTXV upon request.

Replacement Considerations

Equivalent parts include 1N3314A and 1N3314RA. Verify polarity differences as standard units feature anode-to-case connections while the RB variant uses cathode-to-case.