1N2844RB

Overview

The Microchip Technology 1N2844RB is a hermetically sealed, unidirectional silicon Zener diode designed for high-power applications. It features a nominal reference voltage of 160 V with a maximum tolerance of ±5%. The device is rated for 50 W power dissipation and operates at a test current of 80 mA. Housed in the TO-204AD (TO-3) metal flange mount package, it utilizes internal solder bond construction for reliability. The anode is connected to the case, and it contains a single diode element with two pins.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical stability
• High power handling capability suitable for significant current loads
• Case-connected anode configuration for efficient thermal management

Applications

• High-power voltage regulation circuits
• Surge protection systems requiring robust clamping
• Industrial equipment power supplies
• Military and aerospace electronic assemblies

Procurement Notes

Verify the specific suffix RB indicates the ±5% tolerance variant when ordering. Confirm that the TO-204AD package matches your thermal design requirements. Ensure compatibility with MIL-19500/114 standards if military qualification is required. Check for RoHS compliance status as standard versions may not be compliant. Validate pinout orientation where the case serves as the anode terminal.

Selection Notes

Select this component when a stable 160 V reference is needed with high surge capacity. The TO-3 package allows direct mounting to heat sinks for effective thermal dissipation. Consider the ±5% tolerance for precision applications requiring tight voltage control. Evaluate the hermetic seal requirement against the operating environment's humidity and contamination levels.

Part Context

This part belongs to the JEDEC registered 1N2804 through 1N2846B series of 50-watt Zener diodes. These components are widely used in critical infrastructure and defense electronics due to their ruggedness. The series offers various voltage ratings within the same physical footprint, simplifying inventory management for designers working with standardized high-power regulation modules.

Replacement Considerations

Equivalent parts include the 1N2844RE3 from Microchip Technology, which shares identical electrical specifications and package dimensions. Other manufacturers producing MIL-spec equivalents under the 1N2844 designation may also serve as substitutes provided they meet the 50 W and 160 V requirements.