1N2811B

Overview

The Microchip Technology 1N2811B is a single silicon Zener diode designed for high-power voltage regulation applications. It features a nominal Zener voltage of 13 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 50 W and utilizes a TO-204AD (TO-3) flange mount package. Key electrical characteristics include a maximum reverse leakage current of 5 µA and a maximum Zener impedance of 1.1 Ohms. It operates within a temperature range of -65°C to 175°C.

Feature Summary

• Provides stable voltage regulation in high-power circuits through a robust 50 W power rating.
• Utilizes a metal flange mount package for efficient thermal management and secure mounting.
• Ensures precise voltage control with a tight ±5% tolerance on the 13 V reference level.

Applications

• High-power voltage regulation in industrial power supplies
• Over-voltage protection circuits requiring high energy absorption
• Reference voltage sources in military or aerospace electronic systems

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm exact tolerance and qualification levels, as commercial and military variants may share similar base part numbers. Confirm RoHS compliance status, as historical data indicates non-compliance for certain versions. Ensure the procurement channel provides traceability documentation required for critical applications involving this component series.

Selection Notes

Select the 1N2811B when a 13 V regulation point is required with significant power handling capabilities. The TO-3 package necessitates adequate heatsinking infrastructure due to the 50 W dissipation rating. Compare the 1.1 Ohm impedance against load transient requirements to ensure stability. Verify that the operating temperature range meets the environmental demands of the target system.

Part Context

This component belongs to the 1N28xx series of 50 Watt Zener diodes manufactured by Microchip Technology. The series covers a wide voltage range from 3.9 V to 200 V. These devices are often qualified under MIL-PRF-19500/114 for military applications, offering reliability in harsh environments. The 1N2811B specifically addresses the 13 V segment of this high-power portfolio.

Replacement Considerations

Cross-reference with other manufacturers' 1N2811 equivalents or the broader 1N28xx series parts if voltage or power ratings differ. Verify pinout compatibility and thermal resistance characteristics before substituting. Check for updated qualification levels such as JANTX or JANTXV if higher reliability is needed.