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BTA26-800B
Public Made by Adomby adom
KY Thyristors (SCR)/Modules, TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBTA26-800B
KY · Thyristors (SCR)/Modules · TO-220
BTA26-800B from KY, 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 (T1), the triac's main-current terminal on the gate side; the pin 1 position is marked on the TO-220A package drawing and the symbol shows T1(1). |
| 2 | T2 | passive | Main terminal 2 (T2), which carries the on-state current up to IT(RMS) 25 A at Tc=110°C and blocks VDRM/VRRM of 800 V for the BTA26-800. |
| 3 | G | input | Gate, which triggers the triac with VGT ≤1.5 V and IGT ≤35 to ≤50 mA (≤100 mA in quadrant IV on the B version) at VD=12 V, RL=30 Ω. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KY |
| Package | TO-220 |
| 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 current, Tj=25°C | IDRM | 5 | uA | Tj=25°C | 3 | ||
| Repetitive peak off-state current, Tj=125°C | IDRM | 3 | mA | Tj=125°C | 3 | ||
| Repetitive peak reverse current, Tj=25°C | IRRM | 5 | uA | Tj=25°C | 3 | ||
| Repetitive peak reverse current, Tj=125°C | IRRM | 3 | mA | Tj=125°C | 3 | ||
| Forward on voltage | VTM | 1.55 | V | IT=35A tp=380us | 3 | ||
| Gate trigger voltage | VGT | 1.5 | V | VD=12V, RL=30Ω | 3 | ||
| Critical rate of rise of on-state current, quadrants I, II, III | di/dt | 50 | A/us | I,II,III; F=120Hz, Tj=125°C, IG=2xIGT, tr≤100ns | 3 | ||
| Critical rate of rise of on-state current, quadrant IV | di/dt | 10 | A/us | IV; F=120Hz, Tj=125°C, IG=2xIGT, tr≤100ns | 3 | ||
| Gate trigger current, quadrants I, II, III | IGT | 50 | mA | I,II,III; VD=12V, RL=30Ω (column B) | 3 | ||
| Gate trigger current, quadrant IV | IGT | 100 | mA | IV; VD=12V, RL=30Ω (column B) | 3 | ||
| Holding current | IH | 80 | mA | IT=0.2A (column B) | 3 | ||
| Gate non-trigger voltage | VDG | 0.2 | V | ALL; VD=VDRM, TJ=125°C | 3 | ||
| Critical rate of rise of commutation voltage | dv/dt | 500 | V/us | TJ=125°C; VD=2/3VDRM; gate open circuit (column B) | 3 | ||
| Repetitive peak off-state voltage | VDRM/VRRM | 800 | V | BTA26-800 | 3 | ||
| R.M.S on-state current | IT(RMS) | 25 | A | Tc=110°C | 3 | ||
| Surge on-state current | ITSM | 280 | A | tp=16.7ms | 3 | ||
| Surge on-state current | ITSM | 300 | A | tp=10ms | 3 | ||
| I²t for fusing | I²t | 520 | A²s | Tp=10ms | 3 | ||
| Average gate power dissipation | PG(AV) | 1 | W | Tj=125°C | 3 | ||
| Peak gate current | IGM | 6 | A | Tj=125°C | 3 | ||
| Operating junction temperature | Tj | -40 | 125 | °C | 3 | ||
| Storage temperature | TSTG | -40 | 150 | °C | 3 | ||
| Thermal resistance junction to case | Rth(j-c) | 1.1 | °C/W | 3 | |||
| Thermal resistance junction to ambient | Rth(j-a) | 50 | °C/W | 3 |
CAD (KiCad official)
- Symbol:
BTA26-800B - Footprint:
Package_TO_SOT_THT:TO-220-3_Vertical - 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files:
bta26-800b-etched.step/bta26-800b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bta26-800b.step/bta26-800b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KY datasheet (7 pp, sha256
595fc0bdcb5a419b, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).