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MM1Z39B

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Shandong Jingdao Microelectronics Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MM1Z39B

Shandong Jingdao Microelectronics · Zener Diodes · SOD-123

MM1Z39B from Shandong Jingdao Microelectronics, in a SOD-123. 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 Cathode passive Cathode of the zener diode; MM1Z39B has a 36.72-39.78 V nominal zener voltage range (38.22 V min, 39 V nom) at IZT = 5 mA.
2 A passive Anode of the zener diode; forward voltage is 0.9 V at IF = 10 mA and total power dissipation is max 500 mW.

Key specifications

Parameter Value
Manufacturer Shandong Jingdao Microelectronics
Package SOD-123
Category Diodes
Pins 2

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Zener Voltage VZT 38.22 39 39.78 V at IZT, pulses 20 ms, Ta=25°C 2
Zener Test Current IZT 2.5 mA Ta=25°C 2
Dynamic Impedance ZZT 100 Ω at IZT 2
Zener Voltage Tolerance -2 2 % approximately 1
Power Dissipation Ptot 500 mW Ta=25°C 1
Operating and Storage Temperature Range Tj, Tstg -55 150 °C 1
Forward Voltage VF 0.9 V IF = 10 mA 1
Thermal Resistance Junction to Ambient RθJA 340 °C/W PCB mounted, 2.0" x 2.0" (5 x 5 cm) copper pads 1

CAD (KiCad official)

  • Symbol: MM1Z39B
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mm1z39b-etched.step / mm1z39b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm1z39b.step / mm1z39b.glb are the bare package body.

Provenance

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

  • Datasheet: Shandong Jingdao Microelectronics datasheet (3 pp, sha256 b0fd93ec2c97a609, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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