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BT131

Public Made by Adom

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KY Thyristors (SCR)/Modules, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BT131

KY · Thyristors (SCR)/Modules · TO-92

BT131 from KY, in a TO-92. 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 T1 passive Main terminal T1 of the triac (T1(1) in the symbol), the current return terminal for a 1A RMS on-state current at Tc=110°C.
2 T2 passive Main terminal T2 of the triac (T2(2) in the symbol), rated for 600V to 800V repetitive peak off-state voltage VDRM/VRRM.
3 G input Gate trigger terminal (G(3) in the symbol), with gate trigger voltage VGT ≤1.2V and gate trigger current IGT ≤3mA (quadrants I, II, III) or ≤7mA (quadrant IV) at VD=12V.

Key specifications

Parameter Value
Manufacturer KY
Package TO-92
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
Repetitive Peak Off-State Voltage VDRM / VRRM 600 800 V 3
R.M.S On-State Current IT(RMS) 1 A Tc=110°C 3
Surge On-State Current ITSM 12 A Tp=10ms 3
I²t for fusing I²t 0.72 A²s Tp=10ms 3
Average Gate Power Dissipation PG(AV) 0.3 W Tj=125°C 3
Peak Gate Current IGM 1.2 A tp=20us Tj=125°C 3
Operating Junction Temperature Tj -40 125 °C 3
Storage Temperature TSTG -40 150 °C 3
Repetitive Peak Off-State Current IDRM 10 uA Tj=25°C 3
Repetitive Peak Off-State Current IDRM 200 uA Tj=110°C 3
Repetitive Peak Reverse Current IRRM 10 uA Tj=25°C 3
Repetitive Peak Reverse Current IRRM 200 uA Tj=110°C 3
Forward on voltage VTM 1.5 V IT=1.6A tp=380us 3
Gate non-trigger voltage VGD 0.2 V VD=VDRM, Tj=110°C 3
Holding current (quadrants I,II,III) IH 5 mA VD=12V ,IGT=0.1A 3
Holding current (quadrant IV) IH 10 mA VD=12V ,IGT=0.1A 3
Gate trigger voltage VGT 1.2 V VD=12V 3
Gate trigger current (quadrants I,II,III) IGT 3 mA VD=12V 3
Gate trigger current (quadrant IV) IGT 7 mA VD=12V 3
Critical rate of rise of commutation current (quadrants I,II,III) di/dt 50 A/us IT=1A, IG==0.2A, dIg/dt=0.2A/us 3
Critical rate of rise of commutation current (quadrant IV) di/dt 10 A/us IT=1A, IG==0.2A, dIg/dt=0.2A/us 3
Critical rate of rise of commutation voltage dv/dt 30 V/us TJ=110°C VD=2/3VDRM 3

CAD (KiCad official)

  • Symbol: BT131
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92 (KiCad packages3D, STEP)
  • 3D model files: bt131-etched.step / bt131-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bt131.step / bt131.glb are the bare package body.

Provenance

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

  • Datasheet: KY datasheet (7 pp, sha256 037718a4a7f61395, 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