1N2838A

Overview

The Microchip Technology 1N2838A is a high-power Zener diode designed for robust voltage regulation applications. It features a nominal Zener voltage of 100 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 50 W, making it suitable for demanding industrial environments. It utilizes the TO-204AD (TO-3) through-hole package to facilitate efficient heat dissipation. The component operates within a junction temperature range of -65°C to 175°C and exhibits a maximum Zener impedance of 20 Ohms at the test current.

Feature Summary

• High power handling capability of 50 W for stable regulation under heavy loads
• Wide operating temperature range from -65°C to 175°C for extreme environment reliability
• Precision voltage tolerance of ±5% for accurate reference applications
• Robust axial leaded construction in TO-204AD package for secure mounting

Applications

• Industrial power supply voltage regulation
• Overvoltage protection circuits
• Voltage reference standards
• Surge suppression systems

Procurement Notes

Verify the specific suffix 'A' against official Microchip documentation to confirm exact tolerance and electrical characteristics, as generic listings may not distinguish between variants. Ensure the procurement channel provides original manufacturer data sheets. Confirm RoHS compliance status, as historical Microchip TO-204 devices often lack RoHS certification. Validate the package type matches the required TO-204AD footprint before ordering.

Selection Notes

Select this component when a 100 V regulation point is required with significant power dissipation needs. The TO-204AD package necessitates adequate heatsinking or board space compared to smaller packages. Consider the 20 Ohm impedance if low noise or tight dynamic regulation is critical. Compare thermal resistance requirements against the application's ambient temperature constraints to ensure the 175°C junction limit is not exceeded during continuous operation.

Part Context

The 1N2838A belongs to the 1N28xx series of high-power Zener diodes manufactured by Microchip Technology. This series is characterized by its ability to handle substantial power levels in a traditional axial leaded format. These components are typically utilized in legacy designs or industrial equipment where through-hole mounting and high thermal stability are prioritized over miniaturization.

Replacement Considerations

Cross-reference with other manufacturers offering 100 V, 50 W Zener diodes in the TO-204AD package. Verify that substitute parts match the ±5% tolerance and 20 Ohm impedance specifications. Ensure the replacement device supports the same -65°C to 175°C operating temperature range.