Board-to-wire header with UL94 V-0 housing
The 644456-8 is the 8-circuit unshrouded single-row header from TE's MTA-100 series, rated 250VAC and housed in a UL94 V-0 thermoplastic insulator rated -55°C to 105°C.
Obsolete — sourcing through surplus channels
TE Connectivity AMP Connectors lists the 644456-8 as Obsolete.
