1N4757A_T50R

Overview

The onsemi 1N4757A_T50R is a silicon planar power Zener diode designed for stabilizing and clipping circuits. It features a nominal Zener voltage of 51 V with a ±5% tolerance, tested at a current of 5 mA. The device dissipates up to 1.0 W of power at an ambient temperature of 25°C, requiring a derating factor of 6.67 mW/°C above this threshold. It operates within a junction and storage temperature range of -65°C to +200°C. The component utilizes a DO-41 glass case package with solderable terminals compliant with MIL-STD-208.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features a robust glass encapsulation suitable for high-power applications
• Includes a cathode band marking for polarity identification

Applications

• Voltage stabilization in electronic circuits
• Waveform clipping applications
• Reference voltage generation

Procurement Notes

Verify the specific suffix T50R against official documentation to confirm packaging configuration, as standard datasheets may not detail reel specifications. Ensure compatibility with lead-free requirements if applicable, noting that RoHS status varies by manufacturing date and suffix. Confirm availability through authorized distributors, as supply levels fluctuate based on production cycles.

Selection Notes

Select this component when a precise 51 V reference with tight tolerance is required in a through-hole assembly. Consider the thermal management needs due to the 1.0 W dissipation rating and the necessity for adequate heat sinking or PCB copper area. Evaluate the maximum operating temperature limits to ensure reliability under continuous load conditions.

Part Context

This part belongs to the 1N4728A through 1N4758A series of Zener diodes manufactured by onsemi. The series offers a wide selection of voltages from 3.3 V to 100 V, all housed in the standardized DO-41 package. These devices are widely used in general-purpose electronics for their reliability and consistent performance characteristics.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4757A equivalents in DO-41 packages. Verify that substitute parts meet the same 51 V nominal voltage, 5% tolerance, and 1.0 W power dissipation ratings. Ensure mechanical dimensions and terminal configurations match the existing design constraints.