1N6337US/TR

Overview

The Microchip Technology 1N6337US/TR is a surface-mount Zener voltage regulator in the B-SQ MELF package. It provides a nominal Zener voltage of 36 V with a standard tolerance of ±5%. The device operates at a test current of 3.4 mA and exhibits a dynamic impedance of 50 ohms. It supports a maximum steady-state power dissipation of 0.5 W and withstands a surge current of 27 A for an 8.3 ms square wave. The component functions within a junction temperature range of -65 °C to +175 °C.

Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
• Military qualification per MIL-PRF-19500/533 across JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Applications

• High-reliability applications where failure cannot be tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Radiation-hardened circuit designs.

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as these levels dictate the manufacturing lot traceability and testing standards. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military qualified parts. Ensure the tape and reel packaging meets EIA-481-B standards for automated assembly processes.

Selection Notes

Select this component when a robust surface-mount Zener diode is needed for critical systems. The B-SQ MELF package serves as the surface mount equivalent to the axial-leaded 1N6337 series. Consider the thermal resistance characteristics and derating curves for end-cap and ambient temperatures to ensure operation remains within the specified 0.5 W power dissipation limit under all expected conditions.

Part Context

This part belongs to the 1N6309US through 1N6355DUS series of 0.5 watt Zener voltage regulators. The series offers selections from 2.4 to 200 volts with various tolerance options. While available in axial leaded packages, the US suffix denotes the B-SQ MELF surface mount variant. The series is recognized for its industry-standard reliability and voidless-glass construction.

Replacement Considerations

Direct replacements include other 1N6337 variants such as 1N6337US or 1N6337US/TR with matching reliability levels. Verify that substitute components maintain the same B-SQ MELF footprint and hermetic sealing requirements to preserve the original design's radiation hardness and mechanical integrity.

FAQ

What type of metallurgical bond does the 1N6337US use?

The 1N6337US utilizes Category I internal metallurgical bonds, which are specified for devices ranging from 1N6321US through 1N6355US.

Is the 1N6337US resistant to electrostatic discharge?

Yes, the device is non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.