1N4758A-T50A

Overview

The onsemi 1N4758A-T50A is a silicon unidirectional voltage regulator diode housed in the DO-41 axial glass package. It provides a nominal Zener voltage of 56 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 5 µA at 42.6 V and a Zener impedance of 110 Ohms measured at a test current of 4.5 mA.

Feature Summary

• Utilizes glass passivation for hermetic sealing and enhanced stability
• Designed for general-purpose industrial, entertainment, military, and space applications
• Features double stud construction for excellent reliability

Applications

• Voltage stabilization circuits
• Signal clipping applications
• General-purpose industrial electronics
• Military and space equipment

Procurement Notes

Verify the specific suffix T50A against official datasheets to confirm tape-and-reel packaging requirements. Ensure compatibility with existing PCB footprints for the DO-41 package. Cross-reference manufacturer part numbers to avoid confusion with bulk-packaged equivalents or variants from other suppliers that may lack identical thermal ratings.

Selection Notes

Select this component when a precise 56 V regulation point is required in high-reliability environments. The wide operating temperature range up to 200°C makes it suitable for harsh conditions. Verify that the 1 W power rating aligns with the circuit's thermal dissipation capabilities under maximum load conditions.

Part Context

This component belongs to the 1N47xx series of power Zener diodes manufactured by onsemi. These devices are standardized silicon planar power diodes designed for stabilizing and clipping circuits. The series offers various voltage options within the same DO-41 glass case form factor, ensuring interchangeability across different design specifications.

Replacement Considerations

Direct substitutes include the 1N4758A (bulk) and equivalent parts from other manufacturers such as Vishay (1N4758A-TR). Verify that replacement parts maintain the same 56 V Zener voltage, 1 W power rating, and DO-41 package dimensions.