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Product Detailed Parameters
- Description：DIODE ZENER 25V 10W DO4
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：25 V
- Tolerance：±5%
- Power - Max：10 W
- Impedance (Max) (Zzt)：6 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 18.2 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 1N2987RB is a 10-watt Zener diode with a nominal voltage of 19V and ±5% tolerance. It features reverse polarity (anode to stud) in a hermetically sealed DO-4 package. The device operates within a junction temperature range of -65°C to +175°C, with a maximum dynamic impedance of 4 Ohms at the test current of 130mA.
Feature Summary
- Hermetically sealed welded metal and glass construction for environmental protection.
- Internal solder bond construction ensuring mechanical stability.
- Inherently radiation hard design suitable for harsh environments.
- Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.
Applications
- Voltage regulation over broad current and temperature ranges.
- Military and aerospace electronic systems requiring high reliability.
- Radiation-hardened circuit designs.
Procurement Notes
Verify the specific qualification level required, as JAN, JANTX, and JANTXV grades are available. Confirm RoHS compliance status, noting that compliant versions require an e3 suffix on commercial grades only. Ensure the reverse polarity configuration matches the system design requirements before ordering.
Selection Notes
Select this component when a 19V Zener reference with high power dissipation capability is needed. The reverse polarity orientation must be considered for mounting hardware compatibility. Verify thermal derating requirements if operating above +55°C case temperature to ensure safe junction temperatures.
Part Context
This part belongs to the 1N2970B through 1N3015B series of 10W Zener diodes. These devices are JEDEC registered and qualified per MIL-PRF-19500/124. The series offers voltage regulation values between 3.9V and 200V, providing a standardized solution for high-power voltage regulation applications.
Replacement Considerations
Direct substitutes include other parts from the 1N2970B–1N3015B series with matching voltage and polarity. Commercial equivalents may lack military qualification. Verify package dimensions and terminal plating specifications when considering alternative manufacturers.
