1N3316B

Overview

The Microchip Technology 1N3316B 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 17.0 V at a test current of 740 mA. The device features a maximum dynamic impedance of 1.80 ohms and operates within a junction temperature range of -65°C to +175°C. Packaged in a hermetically sealed DO-5 (DO-203AB) metal and glass case, it supports DC power dissipation up to 50 watts at a stud temperature below 75°C.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond design ensuring structural integrity
• Standard polarity configuration with anode connected to the case
• Inherently radiation hard characteristics

Applications

• High power voltage regulation circuits
• Industrial equipment requiring robust thermal performance
• Military and aerospace systems utilizing MIL-PRF-19500/358 qualifications

Procurement Notes

Verify that the component matches the specific 1N3316B designation to ensure the correct 17.0 V nominal voltage rating. Confirm the package type is the standard DO-5 hexagonal stud configuration. Check for any required suffixes if reverse polarity or specific military screening levels are needed for the application environment.

Selection Notes

Select this component when a 50 W power dissipation capability is required for voltage clamping or reference applications. Ensure the mounting hardware allows for adequate heat sinking to maintain the stud temperature below 75°C during operation. Consider the physical dimensions of the DO-5 package for PCB or chassis layout constraints.

Part Context

This part belongs to the broader family of 50 Watt Zener Diodes manufactured by Microsemi's Scottsdale Division. The series covers a wide voltage range from 3.9 V to 200 V, offering various tolerance options including the B suffix for ±5% accuracy. These devices are designed for demanding environments where high power handling and reliability are critical.

Replacement Considerations

Equivalent parts within the same series include 1N3315B and 1N3317B, which offer adjacent voltage ratings. For reverse polarity requirements, use the R suffix variant such as 1N3316RB. Military qualified versions are available with JAN, JANTX, or JANTXV prefixes.