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TDM3426B

Public Made by Adom

by adom

Techcode Semicon MOSFETs, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TDM3426B

Techcode Semicon · MOSFETs · SOT-89

TDM3426B from Techcode Semicon, in a SOT-89. 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 G input Gate; controls the channel, with VGS rated at ±20 V maximum and a threshold of 1.4 V min to 2.5 V max at 250 µA.
2 D passive Drain; rated 30 V VDS maximum and 18 A continuous at TC=25°C (limited by bonding wire), and connected to the SOT-89 tab.
3 S passive Source; its body diode is rated 5 A continuous forward current at TC=25°C.

Key specifications

Parameter Value
Manufacturer Techcode Semicon
Package SOT-89
Category Transistors/Thyristors
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
Drain-Source Voltage VDS 30 V 1
Gate-Source Voltage VGS 20 V 1
Diode Continuous Forward Current Is 5 A TC=25℃ 1
Continuous Drain Current ID 18 A TC=25℃; max continuous current limited by bonding wire (Note 1) 1
Pulse Drain Current IDM 36 A TA=25℃ 1
Maximum Power Dissipation PD 20 W TC=25℃ 1
Maximum Power Dissipation PD 3.5 W TA=25℃ 1
Maximum Power Dissipation PD 2.2 W TA=70℃ 1
Thermal Resistance, Junction-to-Ambient RθJA 35 ℃/W t<10s 1
Maximum Operating Junction Temperature TJ 150 ℃ 1
Storage Temperature Range TSTG -55 150 ℃ 1
Drain-Source Breakdown Voltage BVDSS 30 V VGS=0V ID=250μA 2
Zero Gate Voltage Drain Current IDSS 1 μA VDS=24V,VGS=0V 2
Gate-Body Leakage Current IGSS -10 10 μA VGS=±20V,VDS=0V 2
Gate Threshold Voltage VGS(th) 1.4 1.8 2.5 V VDS=VGS,ID=250μA 2
Drain-Source On-State Resistance RDS(ON) 8.2 10 mΩ VGS=10V, ID=10A 2
Drain-Source On-State Resistance RDS(ON) 12.3 16 mΩ VGS=4.5V, ID=8A 2
Input Capacitance Ciss 450 600 PF VDS=15V,VGS=0V, F=1.0MHz 2
Turn-on Delay Time td(on) 8.5 16 nS VDS=15V, RL=15 Ω, VGEN=10V, RG=6 Ω ID=1A 2
Turn-on Rise Time tr 10 18 nS VDS=15V, RL=15 Ω, VGEN=10V, RG=6 Ω ID=1A 2
Turn-Off Delay Time td(off) 14 26 nS VDS=15V, RL=15 Ω, VGEN=10V, RG=6 Ω ID=1A 2
Turn-Off Fall Time tf 10.6 19 nS VDS=15V, RL=15 Ω, VGEN=10V, RG=6 Ω ID=1A 2
Total Gate Charge Qg 8 12 nC VDS=15V,ID=10A,VGS=10V 2
Diode Forward Voltage VSD 0.8 1.1 V VGS=0V,IS=5A 2

CAD (KiCad official)

  • Symbol: TDM3426B
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: tdm3426b-etched.step / tdm3426b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tdm3426b.step / tdm3426b.glb are the bare package body.

Provenance

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

  • Datasheet: Techcode Semicon datasheet (8 pp, sha256 edc4500bc9885fa9, retrieved 2026-10-18, 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