1N3315RB

Overview

The Microchip Technology 1N3315RB is a high-power 50 W Zener diode from the 1N3305B through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 16 V at a test current of 780 mA. The device features a maximum dynamic impedance of 1.6 ohms and a typical temperature coefficient of +0.070 %/°C. 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.

Feature Summary

• Hermetically sealed welded construction with internal solder bond for reliability
• Reverse polarity configuration with cathode connected to the case
• Inherently radiation hard design suitable for harsh environments
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• High power voltage regulation in military systems
• Overvoltage protection circuits requiring robust thermal performance
• Reference voltage generation in radiation-hardened electronics

Procurement Notes

Verify the specific ordering suffixes against official Microchip documentation to confirm tolerance levels and screening qualifications. Confirm that the reverse polarity designation matches the intended circuit topology. Ensure mounting hardware specifications align with the DO-5 package requirements for proper thermal management and mechanical stability.

Selection Notes

Select this component when applications demand high power dissipation capabilities combined with strict environmental resilience. The reversed polarity option facilitates specific grounding schemes where the cathode must connect to the heatsink. Evaluate thermal resistance characteristics to ensure adequate heat sinking is implemented for sustained operation near the maximum power rating.

Part Context

This part belongs to the 1N3305B through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi (now Microchip Technology). These devices are designed for demanding applications requiring wide voltage ranges and high power handling. The series offers various voltage options and tolerance grades to suit diverse regulatory needs.

Replacement Considerations

Consult factory documentation for surface mount equivalents or alternative part numbers within the same series offering different voltage ratings or tolerances.