1N4758A-TP

Overview

The 1N4758A-TP is a silicon planar Zener diode in a hermetic DO-41 glass package. It features a nominal Zener voltage of 56V at a test current (IZT) of 4.5mA, with a maximum dynamic impedance (ZZT) of 110 ohms at this current. The device has a reverse leakage current (IR) of 0.25uA at 42.6V and a maximum forward voltage drop of 1.2V at 200mA. It supports a DC power dissipation of 1.0W at 50°C ambient temperature, with a thermal resistance of 100 K/W. The operating and storage temperature range spans from -65°C to +200°C.

Feature Summary

• Hermetic glass package construction for environmental stability
• Silicon planar technology for reliable voltage regulation
• High operating and storage temperature capability up to 200°C

Applications

• Voltage reference circuits requiring stable potential
• Overvoltage protection in electronic systems
• Clamping applications for transient suppression

Procurement Notes

Verify the specific suffix 'A' indicates a 5% tolerance on nominal Zener voltage as per datasheet notes. Confirm RoHS compliance status via the 'P' suffix designation if required. Ensure sourcing from authorized distributors to guarantee authenticity and traceability, as MCC does not warrant parts from unauthorized sources.

Selection Notes

Select this component when a 56V Zener voltage with tight 5% tolerance is required. Consider the 110 ohm dynamic impedance for noise-sensitive applications. Verify that the 1.0W power rating and DO-41 package fit the thermal and spatial constraints of the design. Check derating requirements for capacitive loads or elevated ambient temperatures above 50°C.

Part Context

This part belongs to the 1N4728 through 1N4761 series of 1.0 Watt Zener diodes manufactured by Micro Commercial Components. The series covers a voltage range from 3.3V to 75V. The 'A' suffix specifically denotes a tighter manufacturing tolerance compared to the standard unmarked or other suffix variants within the same physical package family.

Replacement Considerations

Cross-reference with other manufacturers' 1N4758A equivalents. Ensure substitute parts match the 56V nominal voltage, 5% tolerance, DO-41 package, and 1.0W power rating. Verify that dynamic impedance and leakage current specifications meet the original circuit requirements.