N0025327Q7006 Limited Source Temp Sensor Redacted.pdf

This is a Justification for Limited Source/Brand Name acquisition form for procurement requisition N00253-27-SIMACQ-KPT-42-0013. The document justifies the restriction to STMicroelectronics as the sole source for an obsolete, precision analog temperature sensor (Manufacturer Part Number STLM20DD9F) required for sustainment and repair of unspecified equipment. The component features a unique 1.0mm x 1.3mm 4-UDFN package, specific terminal configuration, and precise electrical characteristics (output voltage slope of -11.77 mV/°C) that are integral to existing circuit board design and cannot be substituted without extensive re-engineering, re-qualification, and re-testing. The part is officially designated End-of-Life by STMicroelectronics, making it unavailable through standard production channels and limiting procurement to aftermarket sources holding traceable authentic stock.

The procurement is classified as high-risk for counterfeit per NAVSEAINST 4855.40 due to its obsolete status, requiring stringent testing to verify authenticity and performance against OEM datasheets. The component serves as a direct replacement for a failed part on a main circuit board assembly and must interface with existing board layout and micro-circuitry without modification. The justification has been reviewed and approved under FAR 6.303-2 and FAR 13.106-1(b) for compliance with federal acquisition regulations. The Logistics Management Specialist signed the justification on October 20, 2026, and the Contracting Officer approved it on October 22, 2026. The form confirms that no substitutes are available and that STMicroelectronics is the only responsible source capable of meeting the Government's minimum requirements.