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Product Detailed Parameters
- Description：DIODE ZENER 10V 50W DO5
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：10 V
- Tolerance：±5%
- Power - Max：50 W
- Impedance (Max) (Zzt)：0.6 Ohms
- Current - Reverse Leakage @ Vr：25 µA @ 6.7 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 1N3309B 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 10.0 V at a test current (IZT) of 1,200 mA. The device features a maximum dynamic impedance (ZZT) of 0.60 Ohms and a maximum reverse current (IR) of 25 µA at 6.7 V. It operates within a junction and storage temperature range of -65°C to +175°C, utilizing a DO-5 (DO-203AB) hexagonal stud package.
Feature Summary
- Hermetically sealed welded metal and glass construction for durability
- Internal solder bond design ensuring structural integrity
- Standard polarity configuration with anode connected to the case
- Inherently radiation hard characteristics suitable for harsh environments
Applications
- High power voltage regulation circuits
- Military and aerospace electronic systems
- Industrial control equipment requiring robust components
Procurement Notes
Verify specific ordering suffixes such as JAN or JANTXV when military screening levels are required. Confirm thermal management requirements, as the device dissipates up to 50 watts only when the case temperature remains below 75°C. Power derating applies above this threshold. Ensure mounting hardware matches the 1/4-28 thread specification on the hexagonal base.
Selection Notes
Select the 1N3309B for applications requiring precise 10 V regulation with tight tolerance. The B suffix indicates a standard voltage tolerance of plus or minus 5%. Consider the DO-5 package size for board space constraints. Evaluate thermal resistance specifications if operating near maximum power dissipation limits in enclosed spaces.
Part Context
This component belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These devices cover a broad voltage range from 3.9 V to 200 V. The series is designed for high reliability and is available in various military qualification levels including JAN, JANTX, and JANTXV per MIL-PRF-19500/358 standards.
Replacement Considerations
Equivalent parts include the 1N4553B from the parallel 1N4549B through 1N4556B series. Verify that substitute components match the 10.0 V nominal voltage and 50 W power rating. Check package compatibility with the DO-5 hexagonal stud form factor.
