1N3332RB

Overview

The Microchip Technology 1N3332RB is a high-power 50 W Zener diode from the JEDEC registered 1N3305 through 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 62 V at a test current of 200 mA and a maximum dynamic impedance of 7.00 ohms. The device features reverse polarity (cathode to case) indicated by the 'R' suffix, housed in a hermetically sealed DO-5 metal and glass package. It operates within a junction temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for reliability
• Reverse polarity configuration with cathode connected to the case
• Inherently radiation hard design

Applications

• High power voltage regulation
• Military and aerospace electronic circuits
• Harsh environment power supplies

Procurement Notes

Verify that the specific part number matches the required reverse polarity configuration, as standard units feature anode-to-case connections. Confirm that the B suffix indicates the necessary 5% tolerance on the Zener voltage. Ensure the procurement documentation references the correct datasheet revision for thermal derating curves and mechanical dimensions.

Selection Notes

Select this component when a 50 W power dissipation capability is required alongside a 62 V regulation point. The reverse polarity design simplifies mounting where the case must serve as the electrical connection. Verify that the application can accommodate the DO-5 stud mount form factor and the associated thermal management requirements for operation up to 175°C.

Part Context

This component belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a broad voltage range from 3.9 V to 200 V. These devices are designed for rugged applications and are also available in JAN, JANTX, and JANTXV military qualifications per MIL-PRF-19500/358.

Replacement Considerations

Equivalent parts include the 1N4555B from the parallel 1N4549B through 1N4556B series.