ZNREF025-C1 2.5V (1% tolerance) reference IC by Plessey. Package: TO-18 can. (*) Download Plessey ZNREF025 datasheet: Status: NOS (New Old Stock) ex RS components individually tested components: YES RS Legacy stock code: RS 269-926 RoHS compliant: no * note: some with plain leads, some with gold plated leads, some supplied in original RS packaging.