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MM1Z4B7-HAF

Public Made by Adom

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

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MM1Z4B7-HAF

ST(Semtech) · Zener Diodes · SOD-123

MM1Z4B7-HAF from ST(Semtech), 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 terminal of the Zener diode, marked by the cathode line ("III") on the package; the datasheet rates the series at 500 mW power dissipation (TL = 75 °C), and MM1Z4B7 has a nominal Zener voltage of 4.7 V.
2 Anode passive Anode terminal of the Zener diode; the series operating junction temperature range is -55 °C to +150 °C.

Key specifications

Parameter Value
Manufacturer ST(Semtech)
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 (MM1Z4B7, 4.7 V nominal, Vznom 4.7 V) VZT 4.606 4.7 4.794 V at IZT = 5 mA; VZ tested with pulses (20 ms) 2
Dynamic resistance ZZT 130 Ω at IZT = 5 mA 2
Reverse current IR 2 µA at VR = 1 V 2
Forward voltage VF 0.9 V at IF = 10 mA 2
Zener voltage tolerance -2 2 % Zener voltage tolerance ± 2% (suffix B; series feature) 1
Power dissipation PD 500 mW TL = 75 °C; FR-4 PCB = 89 * 38 mm 1
Operating junction temperature range Tj -55 150 °C 1
Storage temperature range Tstg -55 150 °C 1
Thermal resistance junction to ambient RθJA 340 /W Mounted on FR-4 PCB 38 * 38 * 1.6 mm with single-sided Cu pad areas 25 mm2 (>70 µm thick) 1
Thermal resistance junction to lead RθJL 150 /W FR-4 PCB = 89 * 38 mm 1

CAD (KiCad official)

  • Symbol: MM1Z4B7-HAF
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mm1z4b7-haf-etched.step / mm1z4b7-haf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm1z4b7-haf.step / mm1z4b7-haf.glb are the bare package body.

Provenance

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

  • Datasheet: ST(Semtech) datasheet (4 pp, sha256 c3d58e6c2df896cb, retrieved 2026-10-17, 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