1N4907A

Overview

The 1N4907A is a temperature-compensated Zener reference diode manufactured by Microchip Technology. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device has a maximum power dissipation of 400 mW and operates within a junction temperature range of -55°C to +100°C. It utilizes a DO-7 (DO-204AA) axial through-hole package. Maximum reverse leakage current is specified at 15 µA, and the impedance is 200 Ohms.

Feature Summary

• Temperature compensated design for stable voltage reference performance across operating ranges
• Low noise characteristics suitable for precision analog applications
• Through-hole axial construction for standard PCB mounting

Applications

• Precision voltage reference circuits
• Temperature compensated regulator designs
• Low noise analog signal conditioning

Procurement Notes

Verify the manufacturer origin as Microchip Technology or authorized successor entities like Microsemi. Confirm the specific suffix indicates the standard tape-and-reel packaging variant if required for automated assembly. Ensure the component meets the specified 12.8V nominal voltage and 400mW power rating for the intended circuit design constraints.

Selection Notes

Select this component when a stable 12.8V reference with low temperature drift is required in a through-hole configuration. Consider the 400mW power dissipation limit and the ±5% voltage tolerance during circuit design. Verify that the DO-7 package dimensions fit the available board space and mounting requirements.

Part Context

This part belongs to the 1N4900 series of temperature-compensated Zener diodes. These devices are engineered to provide a stable reference voltage over a wide temperature range, making them distinct from standard Zener diodes which may exhibit higher thermal coefficients. The series is widely used in instrumentation and measurement equipment requiring high accuracy.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4907A equivalents such as those from Digitron Semiconductors. Ensure any replacement maintains the 12.8V nominal voltage, 400mW power rating, and DO-7 package form factor to guarantee mechanical and electrical compatibility.