component
BTA41-1200B
Public Made by Adomby adom
KY TRIACs, TO-3P-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownBTA41-1200B
KY · TRIACs · TO-3P-3
BTA41-1200B from KY, in a TO-3P-3. 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, shown as T1(1) in the symbol; the TO-3P Insulated package is rated IT(RMS) 40A at Tc=110°C. |
| 2 | T2 | passive | Main terminal T2 of the triac, shown as T2(2) in the symbol; BTA41-1200B has VDRM/VRRM of 1200V. |
| 3 | G | input | Gate terminal, shown as G(3) in the symbol; gate trigger voltage VGT is ≤1.5V at VD=12V, RL=30Ω. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KY |
| Package | TO-3P-3 |
| Category | Transistors |
| 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), BTA41-1200B | VDRM/VRRM | 1200 | V | 3 | |||
| R.M.S On-State Current | IT(RMS) | 40 | A | Tc=110°C | 3 | ||
| Surge On-State Current (first printed value of 400/420) | ITSM | 400 | A | 3 | |||
| Surge On-State Current (second printed value of 400/420) | ITSM | 420 | A | 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 | 8 | A | 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 | 5 | uA | Tj=25°C | 3 | ||
| Repetitive Peak Off-State Current | IDRM | 5 | mA | Tc=125°C | 3 | ||
| Repetitive Peak Reverse Current | IRRM | 5 | uA | Tc=25°C | 3 | ||
| Repetitive Peak Reverse Current | IRRM | 5 | mA | Tc=125°C | 3 | ||
| Forward on voltage | VTM | 1.55 | V | IT=23A, tp=380us | 3 | ||
| Gate trigger voltage | VGT | 1.5 | V | VD=12V, RL=30Ω | 3 | ||
| Gate trigger current, quadrants I, II, III | IGT | 50 | mA | VD=12V, RL=30Ω, quadrants I, II, III | 3 | ||
| Gate trigger current, quadrant IV | IGT | 100 | mA | VD=12V, RL=30Ω, quadrant IV | 3 | ||
| Holding current | IH | 80 | mA | IT=0.2A | 3 | ||
| Critical rate of rise of commutation voltage | dv/dt | 1000 | V/us | TJ=125°C, VD=2/3VDRM, gate open circuit | 3 |
CAD (KiCad official)
- Symbol:
BTA41-1200B - Footprint:
Package_TO_SOT_THT:TO-3P-3_Vertical - 3D model: TO-3P-3 (KiCad packages3D, STEP)
- 3D model files:
bta41-1200b-etched.step/bta41-1200b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bta41-1200b.step/bta41-1200b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KY datasheet (6 pp, sha256
2ee660fe74201220, retrieved 2026-11-05, 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).