1N4125/TR

Single Zener Diodes Overview

The Microchip Technology 1N4125/TR is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 package. It provides a nominal Zener voltage of 47 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65 °C to +175 °C. Electrical characteristics include a maximum Zener impedance of 250 Ohms, a reverse current of 35.8 µA at 47 V, and a noise density of 40 µV/√Hz. The test current is specified at 250 µA.

Single Zener Diodes Feature Summary

• Features an internal metallurgical bond for enhanced reliability.
• Provides flexible axial-lead mounting terminals suitable for through-hole applications.
• Offers stable voltage regulation across broad ranges of current and temperature.
• Constructed with hermetically sealed glass packaging.

Single Zener Diodes Applications

• Voltage regulation over broad current and temperature ranges
• Reference voltage sources in precision circuits
• Overvoltage protection in sensitive electronic systems

Single Zener Diodes Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the tape and reel packaging option as defined by EIA-296 standards. Confirm the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as these levels dictate qualification per MIL-PRF-19500/435. Ensure the component meets the necessary environmental and radiation hardness requirements if used in high-reliability contexts.

Single Zener Diodes Selection Notes

Select this component when a 47 V Zener voltage with ±5% tolerance is required in a DO-35 package. Consider the 500 mW power dissipation rating and the operating temperature range of -65 °C to +175 °C. Evaluate the 250 Ohm dynamic impedance and 40 µV/√Hz noise density against circuit sensitivity requirements. Verify compatibility with axial-leaded PCB layouts.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener voltage regulators manufactured by Microsemi/Microchip. These devices are JEDEC registered and available in various reliability levels including JAN, JANTX, JANTXV, and JANS. The series covers voltages from 1.8 V to 100 V with tolerances of 5%, 2%, and 1%.

Single Zener Diodes Replacement Considerations

Compatible substitutes within the same family include 1N4124-1 (43 V) and 1N4126-1 (51 V). Surface mount equivalents are available in the DO-213AA package, such as the 1N4125UR-1 variant.