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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：±10%
- 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 1N2837A is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 91V with a tolerance of ±10%. The device supports a maximum power dissipation of 50W and operates with a test current of 140mA. It exhibits a typical impedance of 15 Ohms at the specified test conditions. The component is housed in a TO-204AD (TO-3) through-hole package, suitable for high-power thermal management requirements.
Feature Summary
- High power dissipation capability of 50W for robust voltage regulation
- Precision Zener voltage of 91V with ±10% tolerance
- Through-hole TO-204AD (TO-3) package for secure mounting
Applications
- High-power voltage reference circuits
- Over-voltage protection systems
- Industrial power supply regulation
Procurement Notes
Verify RoHS compliance status as sources indicate conflicting information regarding lead content. Confirm manufacturer origin between Microchip and Microsemi due to historical acquisition data. Ensure the specific ordering suffix matches the required package variant. Check for active lifecycle status before finalizing procurement plans.
Selection Notes
Select this component when a stable 91V reference is required in high-power environments. The TO-204AD package necessitates adequate heatsinking to manage the 50W dissipation. Consider the 15 Ohm impedance for dynamic load variations. Ensure the circuit design accommodates the 140mA test current for accurate voltage regulation.
Part Context
This part belongs to the standard Zener diode family from Microchip Technology. It utilizes the legacy TO-204AD (TO-3) metal case style, which provides superior thermal conductivity compared to plastic packages. The 1N series designation indicates a standardized military-grade specification heritage often adopted for industrial reliability.
Replacement Considerations
Direct substitutes include other 91V 50W Zener diodes in TO-204AD packages. Verify pinout compatibility and thermal resistance characteristics. Cross-reference with Microsemi equivalents if sourcing from legacy inventories. Ensure replacement parts meet the same ±10% voltage tolerance.
