1N6351US

Overview

The Microchip Technology 1N6351US is a military-qualified Zener voltage regulator diode housed in a voidless hermetically sealed glass MELF package. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 0.5 W at an end cap temperature of 150°C. The device exhibits a nominal Zener voltage of 130 V with a standard tolerance of ±5%, tested at a current of 0.95 mA. It features a maximum reverse leakage current of 10 µA at 25°C and 80 µA at 150°C, alongside a dynamic impedance of 850 ohms.

Feature Summary

• Hermetically sealed construction using voidless-glass technology with internal metallurgical bonds for high reliability.
• Qualified per MIL-PRF-19500/533 standards, offering JAN, JANTX, JANTXV, and JANS reliability levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge (ESD) as defined by MIL-STD-750 method 1020.

Applications

• High-reliability applications where component failure cannot be tolerated.
• Voltage regulation across broad operating current and temperature ranges.
• Surface mount implementations requiring robust, small form-factor components.

Procurement Notes

Verify the specific reliability level required, such as JAN, JANTX, JANTXV, or JANS, as these designations dictate qualification standards. Confirm RoHS compliance status if applicable, noting that compliant versions are available only on commercial grades. Ensure the ordering suffix matches the desired voltage tolerance and packaging configuration before finalizing procurement.

Selection Notes

Select this component when a surface-mount equivalent to the axial-leaded 1N6351 series is needed for space-constrained designs. Consider the thermal resistance characteristics, specifically the junction-to-end cap resistance of 21 °C/W for DC operation, to ensure adequate heat dissipation. Verify that the 130 V nominal breakdown aligns with the circuit's regulatory requirements.

Part Context

This part belongs to the 1N6309US through 1N6355DUS series of 0.5 watt Zener voltage regulators. The series provides extensive selections ranging from 2.4 to 200 volts with various tolerance options. While primarily offered in the B-SQ MELF package, axial-leaded DO-35 variants are also available within the same product family.

Replacement Considerations

Direct replacements include other parts within the 1N6309US thru 1N6355DUS series. For axial-leaded equivalents, consult the 1N6309–1N6355D listings. Verify that any substitute maintains the required MIL-PRF-19500/533 qualification level and package dimensions.