component

MMBZ5248B

Public Made by Adom

by adom

EIC Semicon Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MMBZ5248B

EIC Semicon · Zener Diodes · SOT-23

MMBZ5248B from EIC Semicon, 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 A passive Anode of the zener diode, shown connected to the diode symbol in the bottom-view drawing.
2 NC unconnected Not connected internally; the bottom-view drawing shows no connection to the diode symbol.
3 K passive Cathode of the zener diode, shown connected to the bar side of the diode symbol; MMBZ5248B has a nominal zener voltage of 18 V (17.10 V to 18.90 V) at 7.0 mA.

Key specifications

Parameter Value
Manufacturer EIC Semicon
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
Zener voltage VZ 17.1 18 18.9 V IZT = 7.0 mA, Ta = 25 °C, pulsed tp = 20 ms 2
Maximum Zener impedance ZZT 21 Ω IZT = 7.0 mA 2
Maximum Zener impedance ZZK 600 Ω IZK = 0.25 mA 2
Maximum reverse leakage current IR 0.1 μA VR = 14 V 2
Maximum forward voltage VF 0.9 V IF = 10 mA 2
Power dissipation PD 350 mW Ta = 25 °C 1
Junction temperature TJ 150 °C 1
Storage temperature range TSTG -55 150 °C 1
Thermal resistance, junction to ambient air RθJA 357 °C/W Junction to ambient air 1

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
housing Abs * Case : SOT-23 plastic Case Absolute Maximum Ratings ( Ta = 25 °C ) 1

CAD (KiCad official)

  • Symbol: MMBZ5248B
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: mmbz5248b-etched.step / mmbz5248b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbz5248b.step / mmbz5248b.glb are the bare package body.

Provenance

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

  • Datasheet: EIC Semicon datasheet (3 pp, sha256 e80dac09e768e0a4, 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