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MMSZ5243B-7-F

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

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MMSZ5243B-7-F

Diodes Incorporated · Zener Diodes · SOD-123

MMSZ5243B-7-F from Diodes Incorporated, 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 K passive Cathode, the terminal marked by the cathode band; the Zener voltage of the MMSZ5243B is 13V nominal (12.35V to 13.65V) at IZT = 9.5mA.
2 A passive Anode, the terminal opposite the cathode band; forward voltage is 0.9V at IF = 10mA.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
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 (Nominal 13 V, B tolerance) VZ 12.35 13 13.65 V @ IZT = 9.5 mA 2
Maximum Reverse Leakage Current IR 0.5 A @ VR = 9.9 V 2
Maximum Zener Impedance ZZT 13 Ω f = 1KHz, @ IZT = 9.5 mA 2
Maximum Zener Impedance ZZK 600 Ω f = 1KHz, @ IZK = 0.25 mA 2
Operating and Storage Temperature Range TJ, TSTG -65 150 °C 2
Forward Voltage VF 0.9 V @ IF = 10mA 2
Power Dissipation PD 500 mW @ TL = +75°C (Note 4) 2
Power Dissipation PD 370 mW @ TA = +25°C (Note 5) 2
Thermal Resistance, Junction to Ambient Air RθJA 338 °C/W Note 5: FR-4 PCB, 1 inch copper pad 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Matte Tin Finish Annealed over Alloy 42 Leadframe (Lead Free Plating). Solderable per MIL-STD-202, Method 208 1

CAD (KiCad official)

  • Symbol: MMSZ5243B-7-F
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mmsz5243b-7-f-etched.step / mmsz5243b-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz5243b-7-f.step / mmsz5243b-7-f.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (5 pp, sha256 7c7ac7a58521db27, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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