1N3335A

Overview

The Microchip Technology 1N3335A 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 62.0 V at a test current of 200 mA. The device features a maximum dynamic impedance of 7.00 ohms and supports a maximum DC Zener current of 660 mA. It operates within a junction and storage temperature range of -65°C to +175°C, utilizing a hermetically sealed DO-5 (DO-203AB) package with an internal solder bond construction.

Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond design ensuring mechanical stability
• Radiation hard characteristics suitable for harsh environments
• ESD nonsensitive performance per MIL-STD-750 Method 1020

Applications

• High power voltage regulation circuits
• Military and aerospace electronic systems
• Industrial equipment requiring robust protection

Procurement Notes

Verify the specific suffix requirements when ordering, as the 'A' designation indicates a tolerance of +/-10%, distinct from the standard 'B' suffix which denotes +/-5%. Confirm polarity needs, noting that standard units have anode-to-case polarity while reverse polarity requires an 'R' suffix. Ensure adequate heat sinking is planned, as the 50 W rating depends on maintaining the case temperature below 75°C to avoid power derating.

Selection Notes

Select this component for applications demanding high power dissipation capabilities up to 50 W. The 1N3335A offers a specific 62.0 V regulation point with tight tolerance options available via suffix selection. Consider the thermal resistance of 2.0°C/W maximum when designing the mounting interface. Verify compatibility with existing military qualification standards if JAN or JANTX variants are required for the project.

Part Context

This part belongs to the Microsemi Scottsdale Division's 1N3305 through 1N3350B series of 50 Watt Zener diodes. These devices are designed for broad voltage regulation ranges from 3.9 V to 200 V. The series is characterized by low thermal resistance and high reliability, making it suitable for critical infrastructure and defense electronics where long-term stability under high stress is essential.

Replacement Considerations

Equivalent parts include the 1N4549B through 1N4556B series which share identical electrical specifications and physical packaging. Military qualified versions such as JAN1N3335A or JANTX1N3335A provide enhanced screening but maintain functional interchangeability. Ensure any substitute matches the DO-5 package dimensions and thermal characteristics.