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SZBZX84C12LT3G

onsemi · Zener Diodes · SOT-23

SZBZX84C12LT3G from onsemi, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 ANODE passive Anode terminal of the Zener diode; the cathode is the pin marked by the polarity band on the package.
2 NC unconnected Listed as No Connection in the pinout (Style 8), so it has no electrical function on this device.
3 CATHODE passive Cathode terminal of the Zener diode, which is the reverse-biased regulating terminal and is indicated by the polarity band.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-23
Category Diodes
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Reverse Zener Voltage (VZ1), min VZ 11.4 12 12.7 V @ IZT1 = 5 mA (Note 3) 3
Maximum Zener Impedance (ZZT1) ZZT 25 Ω @ IZT1 = 5 mA (Note 3) 3
Reverse Zener Voltage (VZ2) VZ 11.2 12.7 V @ IZT2 = 1 mA (Note 3) 3
Maximum Zener Impedance (ZZT2) ZZT 150 Ω @ IZT2 = 1 mA (Note 3) 3
Reverse Zener Voltage (VZ3) VZ 11.4 12.9 V @ IZT3 = 20 mA (Note 3) 3
Maximum Zener Impedance (ZZT3) ZZT 10 Ω @ IZT3 = 20 mA (Note 3) 3
Reverse Leakage Current IR 0.1 µA @ VR = 8 V 3
Maximum Temperature Coefficient of VZ VZ 6 10 mV/k @ IZT1 = 5 mA 3
Max Capacitance C 130 pF @ VR = 0, f = 1 MHz 3
Forward Voltage VF 0.9 V @ IF = 10 mA 2
Total Power Dissipation on FR-5 Board PD 250 mW @ TA = 25°C (Note 1) 2
Derating above 25°C, FR-5 Board PD 2 mW/°C Derated above 25°C (Note 1) 2
Thermal Resistance, Junction-to-Ambient, FR-5 Board RJA 500 °C/W Note 1 2
Total Power Dissipation on Alumina Substrate PD 300 mW @ TA = 25°C (Note 2) 2
Derating above 25°C, Alumina Substrate PD 2.4 mW/°C Derated above 25°C (Note 2) 2
Thermal Resistance, Junction-to-Ambient, Alumina Substrate RJA 417 °C/W Note 2 2
Junction and Storage Temperature Range TJ, Tstg -65 150 °C 2

CAD (KiCad official)

  • Symbol: SZBZX84C12LT3G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: szbzx84c12lt3g-etched.step / szbzx84c12lt3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); szbzx84c12lt3g.step / szbzx84c12lt3g.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (9 pp, sha256 3cfd93f687d426fd, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF