1N4900/TR

Overview

The Microchip Technology 1N4900/TR is a temperature-compensated Zener diode designed for precision voltage regulation. It features a nominal Zener voltage of 12.8 V with a tight tolerance of ±5%. The device operates in the DO-7 axial through-hole package and dissipates up to 400 mW. Key electrical characteristics include a maximum reverse leakage current of 15 µA, a Zener impedance of 200 Ohms, and a test current of 1 mA. It maintains functionality across an extended temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High reliability construction suitable for demanding industrial environments
• Precision voltage reference capability with tight manufacturing tolerances

Applications

• Precision voltage reference circuits requiring thermal stability
• Industrial control systems operating under extreme temperature conditions
• Test and measurement equipment needing accurate baseline voltages

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm the reel packaging configuration. Ensure that the required Zener impedance and leakage current specifications align with the circuit design constraints before finalizing procurement. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability.

Selection Notes

Select this component when a stable 12.8 V reference is required in through-hole designs. The temperature compensation feature distinguishes it from standard Zener diodes, making it ideal for applications where ambient temperatures fluctuate significantly. Confirm that the 400 mW power dissipation rating meets the thermal requirements of the target application environment.

Part Context

This component belongs to the 1N4900 series of temperature-compensated Zener diodes manufactured by Microchip Technology. The series is engineered to provide superior voltage stability compared to conventional Zener devices. The /TR suffix indicates the specific tape and reel packaging format used for automated assembly processes.

Replacement Considerations

Consult official Microchip substitution guides for verified equivalents. Generic replacements may lack the specific temperature compensation characteristics required for precision applications.