1N3155UR-1/TR

Overview

The Microchip Technology 1N3155UR-1/TR is a temperature-compensated Zener reference diode with an 8.00 V to 8.80 V nominal voltage range. It operates at a test current of 10 mA and features a maximum Zener impedance of 15 Ohms and a reverse current of 10 µA at 5.5 V. The device exhibits a maximum temperature coefficient of 0.005 %/°C over a -55°C to +100°C effective range. Packaged in a DO-7 (DO-204AA) glass axial-lead case, it dissipates up to 500 mW DC power.

Feature Summary

• Provides minimal voltage change across broad temperature ranges for stable reference applications
• Features internal metallurgical bonds and flexible axial-lead mounting terminals
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Instrumentation requiring stable voltage references
• Circuit designs demanding minimal voltage changes over temperature
• Military qualification systems utilizing JAN, JANTX, or JANTXV prefixes

Procurement Notes

Verify the specific ordering suffixes required for your application. The 'TR' suffix indicates tape and reel packaging per EIA-296 standards. Confirm whether military prefixes like JAN or JANTX are necessary for qualification levels up to JANTXV under MIL-PRF-19500/158. Ensure the correct tolerance suffix is added if tighter than standard specifications are needed.

Selection Notes

Select this component when a stable 8.4 V reference with low temperature drift is required. The 1N3155 variant offers a 0.005 %/°C coefficient, balancing stability and cost compared to higher-grade options. Verify that the operating current remains near 10 mA for optimal voltage-temperature stability and minimum power dissipation.

Part Context

This part belongs to the JEDEC registered 1N3154 through 1N3157A series of Zero-TC Reference Diodes. These devices provide a selection of 8.4 V nominal voltages with varying temperature coefficients down to 0.001 %/°C. The series includes commercial, military, and radiation-hardened variants available through specific prefix modifications.

Replacement Considerations

Compatible substitutes include other parts within the 1N3154 through 1N3157A series. For tighter tolerances, consider adding percentage suffixes such as 1N3155-1%. Radiation-hardened equivalents use the RH prefix, such as RH3155.