1N4552RB

Single Zener Diodes Overview

The Microchip Technology 1N4552RB is a high-power 50 W Zener diode with a nominal voltage of 5.1 V and a test current of 2,450 mA. It features a maximum dynamic impedance of 0.12 Ohms at the test current and a reverse leakage current of 20 µA at 5.1 V. The device operates within a junction temperature range of -65°C to +175°C and dissipates up to 50 W when the case temperature is maintained below 75°C. It utilizes a DO-5 (DO-203AB) package with an 11/16 inch hexagonal stud.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction for durability
• Internal solder bond design ensuring robust electrical connections
• Reverse polarity configuration with cathode connected to the case
• Radiation hard characteristics suitable for harsh environments

Single Zener Diodes Applications

• Voltage regulation in power supplies requiring broad operating ranges
• High-power protection circuits in aerospace systems
• Military electronic equipment demanding radiation hardness
• Industrial applications utilizing stud mount thermal management

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements for tolerance and polarity before ordering. Confirm that the application environment supports the required thermal dissipation capabilities. Ensure mounting hardware matches the 11/16 inch hexagonal stud specifications. Check for any updated military qualification prefixes if JAN or JANTX screening is necessary for the project.

Single Zener Diodes Selection Notes

Select this component when a 5.1 V reference requires high power handling and ruggedized packaging. The reverse polarity option allows for flexible circuit layout where the cathode must be grounded via the heatsink. Consider the thermal resistance and derating curves to ensure reliable operation under maximum load conditions without exceeding the junction temperature limits.

Single Zener Diodes Part Context

This part belongs to the 1N4549B through 1N4556B series of 50 Watt Zener diodes manufactured by Microsemi's Scottsdale Division. These devices are JEDEC registered and offer a wide selection of voltages from 3.9 V to 200 V. The series is designed for applications requiring high power dissipation and reliable voltage regulation in demanding environments.

Single Zener Diodes Replacement Considerations

Equivalent parts include the standard 1N4552B for non-reversed polarity configurations. For military-grade screening, consider the JANTX1N4552B or JANTXV1N4552B variants which follow the same electrical specifications but undergo additional testing per MIL-PRF-19500/358 standards.