1N4627UR-1

Overview

The Microchip Technology 1N4627UR-1 is a 500 mW metallurgically bonded glass surface mount Zener diode in the DO-213AA package. It provides a nominal Zener voltage of 6.2 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 dynamic impedance of 1200 Ohms at a test current of 250 µA, a maximum reverse leakage current of 5.0 µA at 4.7 V, and a maximum noise density of 40 µV/√Hz.

Feature Summary

• Constructed with an internal metallurgical bond for high reliability.
• Hermetically sealed glass DO-213AA (MELF style) surface mount package.
• Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard as described in Microsemi MicroNote 050.

Applications

• Voltage regulation over broad ranges of current and temperature.
• High reliability aerospace and defense applications requiring JANS qualification.
• Radiation-hardened circuit designs.

Procurement Notes

Verify the specific reliability level required, such as JAN, JANTX, JANTXV, or JANS, by checking the prefix on the part number. Confirm RoHS compliance status, as commercial versions may differ from military qualified units. Ensure the ordering suffix matches the desired tape and reel option if applicable. Validate that the DO-213AA package footprint aligns with the design specifications.

Selection Notes

Select this component when a hermetically sealed surface mount Zener diode with metallurgical bonding is required. The 1N4627UR-1 offers a 6.2 V regulation point suitable for circuits needing low capacitance and radiation hardness. Consider the thermal derating curve for power dissipation limits above 25°C ambient temperature. Verify that the 1200 Ohm dynamic impedance meets the signal integrity requirements of the application.

Part Context

This device belongs to the 1N4614UR-1 through 1N4627UR-1 series of 500 mZener voltage regulators. These components serve as surface mount equivalents to the JEDEC registered 1N4099 through 1N4135 and 1N4614 through 1N4627 axial-leaded series. The series covers voltages from 1.8 to 100 volts with various tolerance options.

Replacement Considerations

Commercial equivalents are available under the CDLL4627-1 designation. For axial-leaded replacements, consider the 1N4627-1 series. Direct substitution requires verifying package compatibility between DO-213AA and alternative footprints.

FAQ

How is polarity indicated on the 1N4627UR-1?

Polarity is indicated by a cathode band on one end of the glass package. The diode must be operated with the banded end positive with respect to the opposite end for Zener regulation.

What is the maximum noise density specification?

The maximum noise density is 40 µV/√Hz at the test current of 250 µA.