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Product Detailed Parameters
- Description：DIODE ZENER 50V 10W DO4
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：50 V
- Tolerance：±5%
- Power - Max：10 W
- Impedance (Max) (Zzt)：15 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 36 V
- Operating Temperature：-65°C ~ 175°C (TJ)
- Mounting Type：Stud Mount
- Package / Case：DO-203AA, DO-4, Stud
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 2 A
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N2996RB is a 50V Zener diode with a nominal voltage of 50V at a test current of 50mA. It features a maximum dynamic impedance of 15 Ohms and a maximum DC Zener current of 500mA at 25°C stud temperature. The device operates within a junction temperature range of -65°C to +175°C, dissipating up to 10W at a case temperature of +55°C. It utilizes a DO-4 (DO-213AA) package with reverse polarity configuration.
Feature Summary
- Hermetically sealed welded metal and glass construction for durability.
- Internal solder bond design ensuring mechanical stability.
- Reverse polarity configuration with anode connected to the stud terminal.
Applications
- Voltage regulation in military-grade electronic circuits.
- Protection against overvoltage transients in harsh environments.
- Reference voltage sources requiring radiation hardness.
Procurement Notes
Verify that the specific order includes the 'RB' suffix to confirm the reverse polarity configuration where the anode connects to the stud. Ensure compatibility with MIL-PRF-19500/124 qualification levels if required by the system specification. Confirm thermal management capabilities align with the 10W power dissipation rating at the intended operating temperature.
Selection Notes
Select this component when a 50V regulation point is required in a stud-mount configuration. The reverse polarity option allows for flexible circuit layout where the anode must be grounded via the mounting hardware. Consider the high thermal resistance and derating requirements for continuous operation above 55°C case temperature.
Part Context
This part belongs to the 1N2970B through 1N3015B series of 10W Zener diodes. These components are qualified per MIL-PRF-19500/124 for JAN, JANTX, and JANTXV reliability levels. The series covers voltage values from 6.8V to 200V, providing robust regulation solutions for aerospace and defense applications.
Replacement Considerations
Direct substitutes include other 1N2996 variants with matching voltage and power ratings. Verify polarity orientation carefully as standard versions may have cathode-to-stud configurations. Equivalent commercial parts must meet the same hermetic sealing and thermal performance standards.
