1N2834B

Overview

The Microchip Technology 1N2834B is a high-power Zener diode designed for robust voltage regulation applications. It features a nominal Zener voltage of 70 V with a tolerance of ±5%. The device supports a maximum power dissipation of 50 W and operates within an extended temperature range from -65°C to +175°C. Packaged in the TO-204AD (TO-3) through-hole format, it exhibits a maximum dynamic impedance of 9 Ohms at the test current. Reverse leakage current is specified at 10 µA when measured at 56 V, ensuring low standby losses.

Feature Summary

• Provides stable voltage regulation across a broad range of industrial and military-grade environments
• Capable of handling high power dissipation up to 50 W with adequate thermal management
• Engineered for reliability with qualified levels including JAN, JANTX, and JANTXV standards

Applications

• High-power voltage reference circuits requiring strict stability
• Overvoltage protection stages in heavy-duty power supplies
• Industrial control systems operating under extreme thermal conditions

Procurement Notes

Verify that the specific order includes the required qualification level, such as JAN or JANTXV, as these affect performance specifications and pricing structures. Confirm the package type matches the TO-204AD standard. Ensure thermal design accounts for the 50 W dissipation capability. Check for any recent product change notifications regarding material composition or manufacturing site updates before finalizing procurement.

Selection Notes

Select this component when a 70 V regulation point is required with significant power handling capabilities. The wide operating temperature range makes it suitable for harsh environments where standard commercial parts would fail. Consider the TO-3 package size for mounting constraints. Evaluate the need for specific military qualifications like JANTXV if the application demands higher reliability than commercial grades provide.

Part Context

This part belongs to the 1N28xx series of 50 Watt Zener diodes manufactured by Microchip Technology. The series covers a wide voltage spectrum from 3.9 V to 200 V. These devices are JEDEC registered and often qualify for MIL-PRF-19500/114 standards. The 1N2834B specifically targets the 70 V segment of this high-power lineup, offering a balance of voltage precision and thermal robustness for demanding electronic designs.

Replacement Considerations

Compatible substitutes include other 50 W Zener diodes with a 70 V nominal rating and TO-3 packaging. Verify that alternative parts meet the same ±5% tolerance and dynamic impedance specifications. Ensure replacement components support the required -65°C to +175°C operating temperature range. Cross-reference qualification levels if military-grade reliability is mandatory.