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Product Detailed Parameters
- Description：DIODE ZENER 91V 50W TO204AD
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：91 V
- Tolerance：±5%
- Power - Max：50 W
- Impedance (Max) (Zzt)：15 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 69.2 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 1N2837B is a 50W silicon unidirectional Zener voltage regulator diode housed in the TO-204AD (TO-3) through-hole package. It features a nominal breakdown voltage of 91V with a ±5% tolerance. The device operates at a maximum test current of 140mA and exhibits a maximum dynamic impedance of 15 Ohms. Key electrical characteristics include a leakage current of 10µA and a maximum forward voltage of 1.5V.
Feature Summary
- Provides stable voltage regulation via Zener breakdown mechanism
- Designed for high-power dissipation applications up to 50W
- Utilizes hermetically sealed TO-3 metal case construction
Applications
- High-power voltage reference circuits
- Overvoltage protection stages
- Industrial power supply regulation
Procurement Notes
Verify the manufacturer origin, as this part number is associated with multiple entities including Microchip Technology and Central Semiconductor Corp. Confirm specific ordering suffixes if precise packaging or compliance variations are required. Ensure the component matches the intended thermal and mechanical specifications for your assembly process.
Selection Notes
Select this component when a robust 91V regulation point is needed with significant power handling capabilities. The TO-3 package offers superior thermal performance compared to smaller plastic packages, making it suitable for environments requiring high reliability and heat dissipation without active cooling.
Part Context
This component belongs to the standard 1N series of high-power Zener diodes. These devices are widely used in legacy and industrial systems where ruggedness and proven performance are prioritized. The 1N2837B specifically addresses the need for mid-range voltage regulation with substantial power capacity.
Replacement Considerations
Cross-reference with other manufacturers offering equivalent 50W, 91V Zener diodes in TO-3 packages. Verify that any substitute maintains identical pinout configuration, thermal resistance, and voltage tolerance specifications to ensure circuit compatibility.
