1N3312A

Overview

The Microchip Technology 1N3312A 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 13.0 V at a test current of 960 mA. The device features a maximum dynamic impedance of 1.10 ohms and supports a maximum DC Zener current of 3,300 mA. 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 metal and glass construction for durability
• Internal solder bond design ensuring robust electrical connections
• Standard polarity configuration with anode connected to the case
• Inherently radiation hard characteristics suitable for harsh environments

Applications

• High power voltage regulation circuits
• Industrial control systems requiring wide operating ranges
• Military and aerospace applications utilizing JAN or JANTX qualifications

Procurement Notes

Verify the specific suffix requirements when ordering. The 'A' suffix indicates a +/- 10% tolerance on the Zener voltage, while the absence of a suffix denotes a wider tolerance. Confirm whether standard anode-to-case polarity or reverse polarity (cathode-to-case) is required for your application before finalizing the purchase order.

Selection Notes

Select this component for applications demanding high power dissipation capabilities up to 50 watts. Ensure adequate heat sinking is provided to maintain the case temperature below 75°C for full rated power operation. Consider the physical mounting constraints of the DO-5 package and verify that the thermal resistance specifications align with your system's cooling infrastructure.

Part Context

This component is part of the broader 1N3305 through 1N3350B and 1N4549B through 1N4556B series manufactured by Microsemi, now part of Microchip Technology. These devices are designed for robust performance in demanding environments, offering various voltage options from 3.9 V to 200 V within the same hermetically sealed package family.

Replacement Considerations

Equivalent parts include other 50 W Zener diodes in the DO-5 package with a 13 V nominal rating. Verify that any substitute matches the thermal resistance, maximum current ratings, and hermetic sealing requirements of the original specification.