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399-40-121-10-009000 is listed in the Headers, Male Pins range at ChipApex. The manufacturer field lists Mill-Max Manufacturing Corp.. Its product description is CONN HEADER R/A 21POS 2.54MM. Review the specifications below when checking this part for your BOM.
The Mill-Max 399-40-121-10-009000 is a right-angle pin header connector designed for through-hole mounting on printed circuit boards. It features 21 positions with a 0.100-inch (2.54mm) pitch, arranged in a single row. The connector utilizes precision-machined contacts with tin plating to ensure reliable electrical performance. This component is intended for applications requiring perpendicular orientation relative to the PCB surface.
Verify the specific ordering suffix against the manufacturer's current datasheet to confirm exact pin count and plating specifications. Ensure the selected variant matches the required right-angle orientation and single-row configuration for the target PCB layout. Cross-reference the DigiKey part number with official Mill-Max documentation to validate active status and availability before finalizing procurement orders.
Select this component when a right-angle header is required for a 21-position interface with standard 2.54mm spacing. Consider the through-hole mounting style for robust mechanical attachment. Evaluate the single-row layout against available PCB real estate. Confirm that the precision-machined contact type meets the signal integrity requirements of the application environment.
This part belongs to the Mill-Max 399 series of interconnect components, which are characterized by precision-machined contacts rather than stamped ones. The series offers high reliability and durability suitable for rigorous environments. Mill-Max Manufacturing Corp. designs these connectors for use in telecommunications, industrial, and defense sectors where consistent performance is critical.
No public confirmed substitute part numbers are documented for this specific model.
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