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MMSZ5249B_R1_00001

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

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MMSZ5249B_R1_00001

PANJIT International · Zener Diodes · SOD-123

MMSZ5249B_R1_00001 from PANJIT International, 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; the 19 V nominal (18.05 V min to 19.95 V max at 6.6 mA) zener voltage of the MMSZ5249B is positive on this pin relative to the anode.
2 A passive Anode of the zener diode, marked as pin 2 in the SOD-123 package drawing.

Key specifications

Parameter Value
Manufacturer PANJIT International
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 VZ 18.05 19 19.95 V @ IZT = 6.6 mA 2
Max Zener Impedance ZZT 23 Ω @ IZT = 6.6 mA 2
Max Zener Impedance (knee) ZZK 600 Ω @ IZK = 0.25 mA 2
Max Reverse Leakage Current IR 0.1 μA @ VR = 14 V 2
Total Power Dissipation PD 500 mW Notes A 1
Typical Thermal Resistance (Notes B) RθJA 430 OC/W Notes B: FR4 PCB, single-sided copper, mini pad 1
Typical Thermal Resistance (Notes A) RθJA 325 OC/W Notes A: mounted on 100cm2 (1mm thick) copper areas 1
Operating Junction and Storage Temperature Range TJ -55 150 OC 1

CAD (KiCad official)

  • Symbol: MMSZ5249B_R1_00001
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mmsz5249b-r1-00001-etched.step / mmsz5249b-r1-00001-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz5249b-r1-00001.step / mmsz5249b-r1-00001.glb are the bare package body.

Provenance

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

  • Datasheet: PANJIT International datasheet (6 pp, sha256 14125e00b8f213bf, retrieved 2026-10-22, 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