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Product Detailed Parameters
- Description：DIODE ZENER 43V 50W DO5
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：43 V
- Tolerance：±5%
- Power - Max：50 W
- Impedance (Max) (Zzt)：4.5 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 32.7 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Chassis, Stud Mount
- Package / Case：DO-203AB, DO-5, Stud
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 10 A
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N3328B 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 43 V at a test current of 290 mA. The device features a maximum dynamic impedance of 4.5 ohms and supports a maximum DC Zener current of 975 mA. It operates within a junction temperature range of -65°C to +175°C, utilizing a hermetically sealed DO-5 (DO-203AB) package.
Feature Summary
- Hermetically sealed welded metal and glass construction for durability
- Internal solder bond design ensuring robust electrical connections
- Inherently radiation hard characteristics suitable for harsh environments
- Standard polarity configuration with anode connected to the case
Applications
- High power voltage regulation circuits
- Military and aerospace electronic systems
- Harsh environment industrial applications
Procurement Notes
Verify the specific part number against official Microchip documentation to confirm manufacturing origin and revision status. Ensure that the required tolerance suffix matches the application needs, as the 'B' suffix denotes a specific voltage accuracy level. Confirm thermal management requirements align with the specified derating curves for proper heat sinking.
Selection Notes
Select this component when high power dissipation capabilities are required alongside strict environmental sealing standards. The DO-5 stud mount package facilitates efficient thermal transfer to a heatsink. Consider the inherent radiation hardness if the deployment environment involves significant ionizing radiation exposure.
Part Context
This component belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. These devices are designed for demanding applications requiring reliable voltage reference and regulation under high power conditions.
Replacement Considerations
Consult factory documentation for surface mount equivalents or alternative military qualification prefixes such as JAN, JANTX, or JANTXV which offer different screening levels.
