SDS201 silicon NPN transistor - Texas Instruments

SDS201 silicon NPN transistor by Texas Instruments.   

(SDS being the house code for Scientific Data Systems)   

Package: TO-17 with long gold plated leads.   

Datasheet: unavailable   

Status: NOS (New Old Stock)  Date code: 644   

Individually tested components: YES   

RoHS compliant: no   

Used for switching in very early computer systems.