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Product Detailed Parameters
- Description：DIODE ZENER 39V 50W TO204AD
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：39 V
- Tolerance：±10%
- Power - Max：50 W
- Impedance (Max) (Zzt)：4 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 29.7 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Through Hole
- Package / Case：TO-204AD
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 10 A
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N2826A is a silicon 50-watt Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 39V with a tolerance of ±0%. The device operates in a TO-204AD (TO-3) through-hole package, supporting high power dissipation. Key electrical characteristics include a maximum dynamic impedance of 4 Ohms and a test current of 320mA. It is suitable for general-purpose voltage regulation tasks requiring robust thermal performance.
Feature Summary
- High power dissipation capability of 50 watts for demanding regulation loads
- Precision voltage regulation with 39V nominal Zener voltage
- Robust TO-204AD (TO-3) metal case construction for effective heat sinking
Applications
- General purpose voltage reference circuits
- High power voltage regulation systems
- Industrial equipment power supplies
Procurement Notes
Verify the specific manufacturer source, as this component has been produced by multiple entities including Microsemi and Motorola. Confirm RoHS compliance status, as historical versions may contain lead. Ensure the TO-204AD package dimensions match your board layout requirements before finalizing procurement.
Selection Notes
Select this component when a stable 39V reference at high power levels is required. The TO-3 package necessitates adequate heatsinking infrastructure. Compare dynamic impedance specifications against load transient requirements to ensure regulation stability under varying current conditions.
Part Context
This part belongs to the standard 1N series of high-power Zener diodes. Originally standardized by JEDEC, these components are widely used in legacy and industrial designs. The 1N2826A specifically addresses the need for higher wattage regulation compared to smaller signal diodes, bridging the gap between low-power references and complex regulator ICs.
Replacement Considerations
Public confirmed substitutes include 1N2804B variants which share similar electrical profiles. Verify pinout compatibility and thermal resistance values when swapping manufacturers. Ensure replacement parts meet the same 50W power rating and 39V Zener voltage specifications.
