1N3336

Overview

The Microchip Technology 1N3336B is a high-power 50 W Zener diode from the 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 68 V at a test current of 180 mA. The device features a maximum dynamic impedance of 8.0 ohms and a maximum reverse current of 10 µA. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 50 watts at a case temperature below 75°C.

Feature Summary

• Hermetically sealed welded construction with internal solder bond
• Standard polarity connects anode to case; reverse polarity available via suffix
• Inherently radiation hard per Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation in power supplies
• High power protection circuits
• Military and aerospace systems requiring radiation hardness

Procurement Notes

Verify the specific tolerance suffix required for your design, as the 'B' suffix indicates a +/- 5% Zener voltage tolerance. Confirm whether standard or reversed polarity is needed, noting that reversed polarity requires an 'R' suffix in the part number. Ensure mounting hardware specifications align with the DO-5 package requirements for proper thermal management.

Selection Notes

Select this component when high power dissipation up to 50 watts is required in a ruggedized environment. The DO-5 package allows for direct stud mounting to heat sinks. Consider the positive temperature coefficient above 5V for stable operation over varying temperatures. Verify that the application can accommodate the physical size and weight of the hexagonal stud package.

Part Context

This device belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi's Scottsdale Division. These components are JEDEC registered and designed for robust performance in demanding conditions. The series covers a broad voltage range from 3.9 V to 200 V, offering various tolerance options including military qualifications like JAN, JANTX, and JANTXV.

Replacement Considerations

Equivalent parts include other 50W Zener diodes in the DO-5 package with matching 68V ratings. Check datasheets for dynamic impedance and thermal resistance compatibility. Military equivalents may require JAN/JANTX prefixes.