1N3344RB

Single Zener Diodes Overview

The Microchip Technology 1N3344RB 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 130 V and a tolerance of ±5%. The device features a maximum dynamic impedance of 50 Ohms at the test current (IZT) of 95 mA, with a maximum reverse leakage current of 10 µA at 99.8 V. It operates within a junction and storage temperature range of -65°C to +175°C. The component utilizes a DO-5 (DO-203AB) package with an 11/16 inch hexagonal stud for mounting.

Single Zener Diodes Feature Summary

• Hermetically sealed welded metal and glass construction with internal solder bond design
• Reverse polarity configuration where the cathode is connected to the case
• Inherently radiation hard and non-sensitive to electrostatic discharge
• Low thermal resistance enabling operation up to 50 watts with adequate heat sinking

Single Zener Diodes Applications

• Voltage regulation in power supplies requiring broad operating current ranges
• High-power protection circuits utilizing stud mount configurations
• Radiation-hardened electronic systems in aerospace or defense environments

Single Zener Diodes Procurement Notes

Verify that the specific part number includes the 'R' suffix to confirm the reversed polarity configuration, as standard units feature an anode-to-case connection. Ensure the procurement documentation specifies the 'B' suffix to guarantee the required ±5% Zener voltage tolerance. Confirm compliance with RoHS status, noting that this product line may not meet current environmental directives. Validate that the supplier provides original manufacturer packaging to maintain the hermetic seal integrity during transit.

Single Zener Diodes Selection Notes

Select this component when a high-voltage reference of 130 V is required in a ruggedized environment. The DO-5 package allows for direct chassis mounting via the hexagonal stud, simplifying thermal management for high-power dissipation applications. Consider the reverse polarity option if the circuit design requires the cathode to be electrically common with the heatsink. Verify that the system can accommodate the physical dimensions and weight of the stud-mounted package.

Single Zener Diodes Part Context

This device belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These components are designed for robust voltage regulation across a wide voltage spectrum. The series is available in various military qualifications, including JAN, JANTX, and JANTXV, which offer enhanced screening levels per MIL-PRF-19500/358 standards for critical reliability requirements.

Single Zener Diodes Replacement Considerations

Direct substitutes include other parts within the 1N3305–1N3350B series that share the same 130 V rating and DO-5 package. Equivalent replacements must match the 50 W power dissipation capability and the specific reverse polarity configuration indicated by the 'R' suffix.