component

DDZ31Q-7

Public Made by Adom

by adom

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

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DDZ31Q-7

Diodes Incorporated · Zener Diodes · SOD-123

DDZ31Q-7 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 (marked with the cathode band); for DDZ31 the Zener voltage is 30.32 V min to 31.88 V max at IZT = 5 mA.
2 A passive Anode; forward voltage is 0.9 V at IF = 10 mA, and power dissipation is 470 mW at TA = +25°C (Note 7 board).

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 VZ 30.32 31.88 V IZT = 5mA, TA = +25°C 2
Maximum Zener Impedance ZZT 65 Ω IZT = 5mA, f = 1kHz 2
Maximum Zener Impedance (knee) ZZK 250 Ω IZK = 0.5mA, f = 1kHz 2
Maximum Reverse Current IR 0.05 µA VR = 25.0V 2
Forward Voltage VF 0.9 V IF = 10mA 2
Power Dissipation (Note 6) PD 500 mW TL = +75°C 2
Power Dissipation (Note 7) PD 470 mW TA = +25°C 2
Power Dissipation (Note 8) PD 294 mW TA = +25°C 2
Operating and Storage Temperature Range TJ, TSTG -65 150 °C 2
Thermal Resistance, Junction to Ambient Air (Note 7) RθJA 266 °C/W FR-4 PCB, 1in2 copper pad 2
Thermal Resistance, Junction to Ambient Air (Note 8) RθJA 425 °C/W FR-4 PCB, 1x minimum recommended pad layout 2
Thermal Resistance, Junction to Lead RθJL 132 °C/W Note 6 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 1

CAD (KiCad official)

  • Symbol: DDZ31Q-7
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: ddz31q-7-etched.step / ddz31q-7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ddz31q-7.step / ddz31q-7.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (8 pp, sha256 4f2c97bc59065f33, 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