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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：±5%
- 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 1N2826RB is a unidirectional silicon Zener voltage regulator diode manufactured by Microchip Technology. It features a nominal reference voltage of 39 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 50 W and operates in the through-hole TO-204AD (TO-3) package. Key electrical characteristics include a leakage current of 10 µA and a maximum forward voltage of 1.5 V. The component utilizes a metal flange mount construction with an anode-connected case, designed for high-power regulation applications.
Feature Summary
- High power handling capability with a 50 W rating for robust voltage regulation
- Hermetic sealed metal flange mount package ensuring durability in harsh environments
- Unidirectional Zener configuration for precise voltage clamping and protection
Applications
- High-power voltage regulation circuits
- Overvoltage protection systems
- Reference voltage sources in industrial equipment
Procurement Notes
Verify the specific suffix RB to confirm the ±5% tolerance variant. Confirm RoHS non-compliance status if environmental regulations apply. Ensure the TO-204AD package dimensions match the thermal management design. Check manufacturer documentation for detailed derating curves and absolute maximum ratings before integration.
Selection Notes
Select this component when a 39 V regulated output is required at high power levels. The TO-3 package necessitates adequate heatsinking due to the 50 W dissipation rating. Consider the hermetic seal requirement for aerospace or military-grade reliability. Evaluate thermal resistance parameters against the system's ambient temperature constraints.
Part Context
This part belongs to the single Zener diode family from Microchip Technology, formerly Microsemi. It is a legacy silicon-based component designed for high-power discrete applications. The TO-204AD package is standard for high-wattage axial leaded diodes requiring direct mounting to chassis for heat dissipation.
Replacement Considerations
Cross-reference with other 39 V 50 W Zener diodes in the TO-204AD package. Verify pinout compatibility and thermal performance metrics. Ensure equivalent breakdown voltage tolerance and leakage current specifications are met by potential substitutes.
