1N4970US

Single Zener Diodes Overview

The Microchip Technology 1N4970US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 33 V. It operates within a test current range of 40 mA and maintains a maximum dynamic impedance of 10 Ohms at this point. The device dissipates up to 5 Watts of power, featuring a maximum reverse leakage current of 2 µA. It supports a continuous current of 144 mA and withstands surge currents up to 5.0 A for 8.3 ms square waves. The unit exhibits a voltage temperature coefficient of 0.095 %/°C and functions reliably across an operating junction temperature from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds
• Military qualification compliant with MIL-PRF-19500/356 standards
• Robust design inherently resistant to electrostatic discharge events

Single Zener Diodes Applications

• High-reliability military electronic systems
• Critical aerospace circuit protection
• Voltage regulation in harsh environmental conditions

Single Zener Diodes Procurement Notes

Verify the specific revision level against the latest Microsemi datasheet SD44A before finalizing procurement orders. Confirm that the component meets all necessary military qualification requirements for your intended application environment. Ensure proper handling procedures are followed due to the hermetic sealing characteristics. Cross-reference the package outline dimensions with your PCB layout specifications to guarantee accurate mounting compatibility.

Single Zener Diodes Selection Notes

Select this component when high reliability and radiation hardness are required in surface mount designs. The 5 Watt power rating allows for significant current handling capabilities compared to lower-power alternatives. Consider the specific thermal resistance values when designing heat dissipation strategies for enclosed spaces. Evaluate the tight tolerance options if precise voltage regulation is critical for the system performance.

Single Zener Diodes Part Context

This part belongs to the 1N4954US through 1N4996US series of surface mount Zener diodes manufactured by Microsemi's Scottsdale Division. These components are designed as industry-standard replacements for axial-leaded versions while offering superior mounting flexibility. The series provides extensive voltage selections ranging from 3.3 to 390 volts, catering to diverse voltage regulation needs in professional electronics manufacturing.

Single Zener Diodes Replacement Considerations

Direct axial-leaded equivalents exist within the same series but require different mounting techniques. Surface mount variants with tighter tolerances may be available using specific suffix letters. Verify mechanical footprint compatibility when substituting with similar packages from other manufacturers.