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Product Detailed Parameters
- Description：DIODE ZENER 7.5V 50W DO5
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：7.5 V
- Tolerance：±10%
- Power - Max：50 W
- Impedance (Max) (Zzt)：0.3 Ohms
- Current - Reverse Leakage @ Vr：125 µA @ 5 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 1N3306RA is a high-power 50 W Zener diode from the JEDEC registered 1N3305 thru 1N3350B series. It provides voltage regulation with a nominal Zener voltage of 7.5 V at a test current of 1,700 mA and a maximum dynamic impedance of 0.30 Ohms. The device features reverse polarity (cathode to case) indicated by the 'R' suffix and operates within a junction and storage temperature range of -65°C to +175°C.
Feature Summary
- Hermetically sealed welded construction with internal solder bond
- Reverse polarity configuration with cathode connected to the case
- Inherently radiation hard design
Applications
- Voltage regulation in broad operating current and temperature ranges
- High power applications requiring adequate mounting and heat sinking
Procurement Notes
Verify that the specific part number includes the 'R' suffix to confirm the reversed polarity configuration where the cathode is connected to the case. Ensure the procurement documentation explicitly references the Microsemi Scottsdale Division datasheet for the 1N3305-50B-RB series to validate the electrical characteristics and mechanical specifications against the required application parameters.
Selection Notes
Select this component when a high-power 50 W Zener diode with a 7.5 V breakdown voltage is required in a DO-5 package. The reversed polarity option is suitable for designs where the cathode must be electrically tied to the mounting base or chassis. Verify thermal management capabilities are sufficient to handle the 50 W dissipation at case temperatures below 75°C.
Part Context
This component belongs to the 1N3305 thru 1N3350B series of high-power Zener diodes manufactured by Microsemi's Scottsdale Division. These devices are designed for robust voltage regulation applications and are available in various voltage ratings ranging from 3.9 V to 200 V. The series offers military qualifications including JAN, JANTX, and JANTXV levels upon request.
Replacement Considerations
Equivalent parts include the standard 1N3306B for non-reversed polarity applications. For direct replacement with reversed polarity, verify availability of other manufacturers offering 50 W Zener diodes in the DO-5 package with identical 7.5 V nominal voltage and thermal resistance specifications.
