1N3156UR-1/TR

Overview

The Microchip Technology 1N3156UR-1/TR is a temperature-compensated Zener reference diode with an 8.00 to 8.80 V nominal voltage range. It operates at a test current of 10 mA and features a maximum impedance of 15 ohms and reverse current of 10 µA at 5.5 V. The device exhibits a maximum temperature coefficient of 0.002 %/°C over a -55°C to +100°C range. Packaged in a DO-7 (DO-204AA) axial lead glass case, it supports tape-and-reel mounting via the TR suffix.

Feature Summary

• Temperature compensated design for minimal voltage change across broad ranges
• Hermetically sealed glass case with flexible axial-lead terminals
• Internal metallurgical bonds for structural integrity

Applications

• Instrumentation requiring stable voltage references
• Circuit designs demanding low temperature drift
• Precision analog signal conditioning

Procurement Notes

Verify the specific ordering suffixes against official documentation to confirm package type and compliance status. Confirm military qualification prefixes if required for your application. Ensure the TR suffix matches your automated assembly equipment specifications. Cross-reference datasheet revisions for updated mechanical dimensions.

Selection Notes

Select this component when precise voltage stability is critical over varying thermal conditions. The 1N3156 series offers tighter temperature coefficients compared to standard Zeners. Verify operating current requirements align with the 10 mA test condition for optimal performance. Consider the DO-7 package constraints for board layout and thermal management.

Part Context

This part belongs to the 1N3154 through 1N3157 series of Zero-TC Reference Diodes. These devices provide nominal 8.4 V outputs with selectable temperature coefficients ranging from 0.01%/°C down to 0.001%/°C. The series includes commercial, military, and radiation-hardened variants available through specific prefix and suffix modifications.

Replacement Considerations

Direct substitutes include other 1N3156 series variants such as 1N3156 or 1N3156A. Military equivalents are available with JAN or JANTX prefixes. Verify that replacement parts maintain the same 15 ohm impedance and 0.002 %/°C temperature coefficient limits.