1N3305A

Overview

The Microchip Technology 1N3305A is a high-power 50 W Zener diode with a nominal voltage of 6.8 V and a tolerance of ±10%. It operates within a temperature range of -65°C to +175°C, featuring a maximum DC Zener current of 6,600 mA at a test current of 1,850 mA. The device exhibits a typical temperature coefficient of 0.040 %/°C and a maximum dynamic impedance of 0.20 Ohms at the test current.

Feature Summary

• Hermetically sealed welded construction with internal solder bond
• Standard polarity configuration with anode connected to case
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge

Applications

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

Procurement Notes

Verify that the specific part number includes the 'A' suffix to confirm the required ±10% voltage tolerance. Confirm the package type matches the DO-5 (DO-203AB) stud mount requirement for your thermal management setup. Ensure compatibility with the standard anode-to-case polarity unless a reverse polarity variant is explicitly needed.

Selection Notes

Select this component when a robust 50 W Zener diode is required for high-current applications. The 1N3305A provides a stable 6.8 V reference with moderate tolerance. Consider the DO-5 package dimensions and hexagonal stud mounting requirements during PCB or chassis layout planning to ensure adequate heat sinking.

Part Context

This component belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi (now Microchip Technology). These devices are designed for high-power voltage regulation and are available in various voltage ratings from 3.9 V to 200 V. The series is known for its ruggedness and suitability for demanding environments.

Replacement Considerations

Consult factory for surface mount equivalents. Other parts in the 1N3305 series may be used if voltage and tolerance specifications align.