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Product Detailed Parameters
- Description：DIODE ZENER 9.1V 50W DO5
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：9.1 V
- Tolerance：±10%
- Power - Max：50 W
- Impedance (Max) (Zzt)：0.5 Ohms
- Current - Reverse Leakage @ Vr：25 µA @ 6.1 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 1N3308B 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 8.2 V at a test current (IZT) of 1,500 mA. The device features a maximum dynamic impedance (ZZT) of 0.40 Ohms and a maximum DC Zener current (IZM) of 5,200 mA. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 50 watts at a case temperature below 75°C.
Feature Summary
- Hermetically sealed welded metal and glass construction for durability
- Internal solder bond design ensuring robust electrical connections
- 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
- Power supply protection and reference applications
Procurement Notes
Verify the specific suffix requirements when ordering. The 'B' suffix indicates a standard tolerance of +/- 5% on the Zener voltage. An 'R' suffix denotes reversed polarity where the cathode connects to the case. Ensure the procurement documentation matches the required military qualification level if applicable, such as JAN or JANTXV variants.
Selection Notes
Select this component for applications requiring high power dissipation capabilities up to 50 watts. Consider the thermal resistance of 2.0°C/W maximum when designing heat sinking solutions. Verify that the operating current remains within the specified limits to maintain stable voltage regulation across the required temperature range.
Part Context
This device belongs to the Microsemi Scottsdale Division 1N3305 through 1N3350B series of 50 Watt Zener diodes. These components are designed for broad voltage regulation needs ranging from 3.9 V to 200 V. They utilize a DO-5 (DO-203AB) package with a hexagonal stud mount for efficient thermal management in industrial and defense electronics.
Replacement Considerations
Equivalent parts include the 1N4551B from the parallel 1N4549B through 1N4556B series. Both series share identical mechanical dimensions and electrical specifications. Ensure the replacement maintains the same polarity configuration and tolerance class.
