1N2997B

Overview

The Microchip Technology 1N2997B is a 10-watt Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 36 V with a tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and utilizes a DO-203AA (DO-4) axial leaded package suitable for panel or chassis mounting. Key electrical characteristics include a maximum Zener impedance of 3 Ohms at the test current, a reverse leakage current of 1 µA at 32.4 V, and a forward voltage drop of 1.5 V at 2 A.

Feature Summary

• Provides stable voltage regulation with a 10-watt power dissipation rating
• Capable of operation in extreme environments from -65°C to +175°C
• Features low Zener impedance for improved regulation performance
• Constructed in a rugged DO-203AA axial leaded package

Applications

• High-power voltage reference circuits
• Over-voltage protection systems
• Industrial power supply regulation

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm qualification levels such as JAN, JANTX, or JANTXV, as these affect reliability standards. Ensure the required mounting style matches the DO-203AA axial lead configuration. Confirm that the thermal management design supports the 10-watt dissipation requirement at the intended operating temperature.

Selection Notes

Select this component when a high-power 36 V regulation solution is required. The wide operating temperature range makes it suitable for harsh industrial environments. Compare the 3 Ohm impedance against lower-power alternatives if tighter regulation is needed. Verify that the physical size of the DO-4 package fits the mechanical constraints of the assembly.

Part Context

This part belongs to the JEDEC registered 1N2970B through 1N3015B series of 10-watt Zener diodes manufactured by Microchip Technology. These devices are qualified per MIL-PRF-19500/124 for military standards. The series covers voltage regulation values between 3.9 V and 200 V, offering a broad selection for various power supply designs requiring robust voltage clamping.

Replacement Considerations

Consult official Microchip documentation for confirmed substitute part numbers within the same 10W Zener series. Cross-reference specifications such as Zener voltage tolerance, impedance, and package dimensions to ensure compatibility.