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BTA26

Public Made by Adom

by adom

WEIDA TRIACs, TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BTA26

WEIDA · TRIACs · TO-220

BTA26 from WEIDA, in a TO-220. 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 1 of the triac, the current return side; the device is rated for 25 A IT(RMS) and VDRM/VRRM of 600/800/1200/1600 V.
2 T2 passive Main terminal 2 of the triac; the insulated TO-220A package isolates all three terminals from the heatsink with a rated insulation voltage of 2500 VRMS.
3 G input Gate trigger terminal; gate trigger current IGT is max 35 mA (CW) or 50 mA (BW) at VD=12 V, RL=33 Ω, with peak gate current IGM of 4 A.

Key specifications

Parameter Value
Manufacturer WEIDA
Package TO-220
Category Triode/MOS Tube/Transistor
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
On-state voltage VTM 1.5 V ITM=35A tp=380μs Tj=25℃ 3
Off-state/reverse leakage current IDRM/IRRM 10 µA VDRM=VRRM, Tj=25℃ 3
Off-state/reverse leakage current IDRM/IRRM 3 mA VDRM=VRRM, Tj=125℃ 3
Gate non-trigger voltage VGD 0.2 V VD=VDRM, Tj=125℃, RL=3.3kΩ 2
Storage junction temperature range Tstg -40 150 ℃ 1
Operating junction temperature range Tj -40 125 ℃ 1
RMS on-state current IT(RMS) 25 A 1
Non repetitive surge peak on-state current ITSM 250 A full cycle, F=50Hz 1
I2t value for fusing I2t 340 A2s tp=10ms 1
Critical rate of rise of on-state current dI/dt 50 A/μs IG=2×IGT 1
Peak gate current IGM 4 A 2
Average gate power dissipation PG(AV) 1 W 2
Peak gate power PGM 10 W 2
Thermal resistance junction to case (AC), TO-220A (Ins) Rth(j-c) 1.5 ℃/W junction to case(AC), TO-220A(Ins) 3

CAD (KiCad official)

  • Symbol: BTA26
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: bta26-etched.step / bta26-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bta26.step / bta26.glb are the bare package body.

Provenance

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

  • Datasheet: WEIDA datasheet (8 pp, sha256 ca8b081d3f037dec, retrieved 2026-10-27, 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