1N6335US

Overview

The Microchip Technology 1N6335US is a surface-mount Zener voltage regulator featuring a B-SQ MELF package. It provides a nominal Zener voltage of 30 V with a standard tolerance of ±5%. The device 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. Electrical characteristics include a maximum dynamic impedance of 32 Ω, a reverse leakage current of 10 µA at 25 °C, and a forward voltage of 1.4 V at 1.0 A.

Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
• Qualified per MIL-PRF-19500/533 standards for military-grade applications.
• Inherently radiation hard and non-sensitive to electrostatic discharge (ESD).
• Surface mount equivalent of the JEDEC registered 1N6309 through 1N6355 series.

Applications

• High-reliability circuits where failure cannot be tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Radiation-hardened electronic systems.

Procurement Notes

Verify the specific reliability level required, as the base part number corresponds to commercial grade availability while JAN, JANTX, JANTXV, and JANS levels are available variants. Confirm RoHS compliance status, as it applies only to commercial grade versions. Check datasheet nomenclature for tight tolerance options if tighter than standard 5% is needed. Ensure ordering suffixes match the desired qualification level.

Selection Notes

Select this component for applications requiring robust surface-mount Zener regulation in extreme environments. The B-SQ MELF package offers a compact form factor suitable for space-constrained designs. Consider thermal derating curves when designing for high ambient temperatures or elevated end cap conditions. Verify that the 0.5 W power dissipation rating aligns with the circuit's steady-state requirements.

Part Context

This device belongs to the 1N6309US through 1N6355DUS series of voidless hermetically sealed glass Zener diodes. The series covers Zener voltages from 2.4 V to 200 V with various tolerance options. These regulators utilize industry-recognized metallurgical bonding techniques to ensure durability and performance in demanding operational scenarios.

Replacement Considerations

ZMY30-GS18 by Vishay General Semiconductor is listed as a comparable alternative part.