1N2985B

Overview

The Microchip Technology 1N2985B is a silicon unidirectional voltage regulator diode designed for robust power handling. It features a maximum power dissipation of 10 W and operates within a wide temperature range from -65 °C to +175 °C. The device utilizes a DO-4 metal package with hermetically sealed welded construction, ensuring durability in demanding environments. Internal solder bond construction supports high reliability applications requiring stable voltage regulation.

Feature Summary

• Hermetically sealed welded metal construction
• Internal solder bond design
• High power dissipation capability

Applications

• Voltage regulation circuits
• Military grade electronic systems
• Harsh environment protection

Procurement Notes

Verify the specific Zener voltage value against the official datasheet, as it varies across the series. Confirm that the DO-4 package matches your board layout requirements. Ensure the manufacturer source is recognized for military qualification standards if applicable. Check lead times due to specialized manufacturing processes.

Selection Notes

Select this component when high thermal stability and ruggedness are required. The DO-4 package offers superior heat dissipation compared to smaller plastic packages. Consider the operating temperature range limits during circuit design. Verify compatibility with existing mounting hardware for through-hole installation.

Part Context

This part belongs to the 1N2970B through 1N3015B series of 10 Watt Zener diodes. These components are widely used in industrial and aerospace sectors where reliability is critical. The series provides various voltage options within a standardized mechanical form factor.

Replacement Considerations

Check for equivalent parts from other manufacturers offering MIL-PRF-19500/124 qualifications. Verify pinout compatibility and physical dimensions before substitution.