1N4904A

Overview

The Microchip Technology 1N4904A is a Zener diode designed for voltage regulation applications. 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 a maximum Zener impedance of 100 Ohms. It operates within a temperature range of -55°C to +100°C and utilizes a DO-7 axial through-hole package.

Feature Summary

• Provides stable voltage regulation at a nominal 12.8 V level
• Capable of handling up to 400 mW of power dissipation
• Constructed in a standard DO-7 axial leaded package for through-hole mounting

Applications

• Voltage reference circuits
• Overvoltage protection
• General-purpose voltage regulation

Procurement Notes

Verify the specific manufacturer lot and date code upon receipt to ensure component authenticity and traceability. Confirm that the received parts match the specified DO-7 package dimensions and electrical characteristics outlined in the official datasheet before integration into production assemblies.

Selection Notes

Select this component when a precise 12.8 V reference is required in low-power through-hole designs. Ensure the circuit design accounts for the 400 mW thermal limit and the ±5% voltage tolerance to maintain system stability under varying load conditions.

Part Context

This part belongs to the broader family of Zener diodes manufactured by Microchip Technology. It serves as a discrete semiconductor solution for maintaining constant voltage levels in electronic circuits, distinct from integrated voltage regulators or transient suppression devices.

Replacement Considerations

Consult official substitution guides for compatible equivalents. Verify that any alternative part matches the 12.8 V Zener voltage, 400 mW power rating, and DO-7 package form factor to ensure mechanical and electrical compatibility.