BZX55-C4V3 4.3 Volt Zener diode by STMicroelectronics. Rating: 4.3Volt , I max : 500mW , E24 series (±5% tolerance range) Package: DO-35 Download Philips BZX55-C4V3 datasheet: Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no