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SDM03U40Q-7

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Diodes Incorporated Schottky Barrier Diodes (SBD), SOD-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SDM03U40Q-7

Diodes Incorporated · Schottky Barrier Diodes (SBD) · SOD-523

SDM03U40Q-7 from Diodes Incorporated, in a SOD-523. 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, identified by the cathode band on the package; the datasheet gives 40V peak reverse voltage (VRM), 30V DC reverse voltage (VR) and 30mA average rectified current (IO) for the diode.
2 A passive Anode terminal of the Schottky barrier diode, with maximum forward voltage of 370mV at IF = 1mA.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOD-523
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
Reverse Breakdown Voltage V(BR)R 40 V IR = 10µA 2
Forward Voltage VF 290 370 mV IF = 1mA 2
Peak Reverse Current IR 0.5 µA VR = 30V 2
Total Capacitance CT 2 pF VR = 1V, f = 1.0MHz 2
Peak Reverse Voltage VRM 40 V TA = +25°C 2
DC Reverse Voltage VR 30 V TA = +25°C 2
RMS Reverse Voltage VR(RMS) 21 V TA = +25°C 2
Average Rectified Current IO 30 mA TA = +25°C 2
Non-Repetitive Peak Forward Surge Current IFSM 200 mA @8.3ms single half sine-wave superimposed on rated load 2
Operating and Storage Temperature Range TJ, TSTG -40 125 °C 2
Thermal Resistance, Junction to Ambient (Note 6) RθJA 450 °C/W Note 6: FR-4 board with recommended pad layout 2
Thermal Resistance, Junction to Ambient (Note 7) RθJA 300 °C/W Note 7: 1-inch sq. 2oz 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  Terminal Connections: Cathode Band  Terminals: Finish - Matte Tin Annealed over Alloy 42 Leadframe. 1

CAD (KiCad official)

  • Symbol: SDM03U40Q-7
  • Footprint: Diode_SMD:D_SOD-523
  • 3D model: SOD-523 (KiCad packages3D, STEP)
  • 3D model files: sdm03u40q-7-etched.step / sdm03u40q-7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sdm03u40q-7.step / sdm03u40q-7.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (5 pp, sha256 cacb100e2fcbb716, retrieved 2026-10-23, tier: manufacturer)
  • 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