BZX55-C4V7 (MTZJ4.7B) Zener diode by Rohm. Rating: 4.7 Volt, 500mW, 5% Tolerance. Package: DO-35 simply marked: 4V7B Download Rohm MTZJ4.7B .pdf datasheet: Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no