1N3157-1

Overview

The Microchip Technology 1N3157-1 is a temperature-compensated Zener reference diode designed for precision voltage regulation. It features an 8.4 V nominal Zener voltage with a low temperature coefficient of 0.001 %/°C, ensuring minimal voltage drift across varying thermal conditions. The device operates within a wide temperature range from -65°C to +175°C and supports a DC power dissipation of 500 mW at +50°C. Key electrical characteristics include a maximum reverse leakage current of 10 µA at 25°C and a test current of 10 mA.

Feature Summary

• Temperature compensated design for stable reference voltage
• Hermetically sealed glass axial-leaded DO-7 package
• Wide operating temperature range suitable for harsh environments

Applications

• Precision voltage reference circuits
• Military aerospace systems requiring MIL-PRF-19500/158 compliance
• High-reliability industrial instrumentation

Procurement Notes

Verify the specific qualification grade (JAN, JANTX, or JANTXV) required for your application, as these suffixes denote different reliability levels under MIL-PRF-19500/158. Confirm that the DO-7 hermetic package aligns with your assembly process capabilities. Ensure the 500 mW power rating and derating curves are accounted for in your thermal design to prevent overheating during operation.

Selection Notes

Select this component when a highly stable 8.4 V reference is needed with minimal temperature dependence. The 1N3157-1 is distinct from standard Zener diodes due to its zero-TC characteristic. Consider the through-hole DO-7 package if surface mount options are not feasible. Compare against the CDLL3157 series if a leadless surface-mount alternative is preferred for space-constrained designs.

Part Context

The 1N3157-1 belongs to the popular 1N3154 through 1N3157A series of Zero-TC Reference Diodes manufactured by Microsemi/Microchip. This series provides a selection of 8.4 V nominal voltages with temperature coefficients as low as 0.001 %/°C. These diodes are widely used in applications demanding high stability and are available in various military qualifications and RoHS-compliant versions.

Replacement Considerations

The CDLL3157 series serves as a surface-mount equivalent within the same functional family. For direct pin-compatible replacements, verify the specific military grade suffix (e.g., JANTXV1N3157-1) matches the required reliability standards. Cross-reference with other 8.4 V temperature-compensated Zener diodes only if package and tolerance specifications allow.