UM9989SM/TR

Overview

The UM9989SM/TR is a PIN diode manufactured by Microchip Technology. It utilizes Silicon (Si) technology and is housed in a hermetic MELF package. The component is classified under PIN Diodes within the Diodes & Rectifiers subcategory. Official documentation indicates that this specific part number is currently not supplied by Mouser, with availability potentially limited to factory special orders or restricted supply channels.

Feature Summary

• Hermetic sealing for environmental protection
• MELF package form factor

Applications

Procurement Notes

Verify current availability directly with Microchip Technology as the component is listed as not supplied by major distributors like Mouser. Confirm if the part is available via factory special order or if it has been superseded by a newer revision. Request official datasheets and compliance documents before finalizing procurement plans to ensure compatibility with existing designs.

Selection Notes

Select this component when hermetic sealing is required for high-reliability applications. Ensure the design accommodates the MELF package dimensions. Verify that the silicon PIN diode characteristics meet the circuit requirements. Check for alternative non-hermetic versions if hermeticity is not strictly necessary.

Part Context

This part belongs to the Microchip Technology PIN diode family. It shares the core silicon PIN diode functionality with other models in the series but differs in packaging. The hermetic MELF variant is distinct from plastic SMT or glass axial options available in the broader product line.

Replacement Considerations

Check for direct substitutes such as the UMX9989-GM2 if hermeticity is not required. Consult Microchip's cross-reference tools for parametrically similar parts. Verify package compatibility and electrical specifications before substituting.