component
BT137-800D
Public Made by Adomby adom
WEIDA Thyristors (SCR)/Modules, TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BT137-800D
WEIDA · Thyristors (SCR)/Modules · TO-252
BT137-800D from WEIDA, in a TO-252. 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, the current return side (RMS on-state current IT(RMS) 8 A, VDRM/VRRM 600/800 V). |
| 2 | T2 | passive | Main terminal T2 of the triac, the middle lead, which is also the tab (peak off-state and reverse voltage VDRM/VRRM 600/800 V). |
| 3 | G | input | Gate trigger input; IGT for the D grade is 5 mA max in quadrants I-II-III and 10 mA in quadrant IV, with VGT 1.3 V max (VD=12V, RL=33Ω). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WEIDA |
| Package | TO-252 |
| 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 | 800 | V | Tj=25℃ | 1 | ||
| Repetitive peak reverse voltage | VRRM | 800 | V | Tj=25℃ | 1 | ||
| Storage junction temperature range | Tstg | -40 | 150 | ℃ | 1 | ||
| Operating junction temperature range | Tj | -40 | 125 | ℃ | 1 | ||
| RMS on-state current | IT(RMS) | 8 | A | 1 | |||
| Non repetitive surge peak on-state current | ITSM | 65 | A | full cycle, F=50Hz | 1 | ||
| I2t value for fusing | I2t | 21 | A2s | tp=10ms | 1 | ||
| Critical rate of rise of on-state current, Quadrants Ⅰ-Ⅱ-Ⅲ | dI/dt | 50 | A/μs | IG=2×IGT, Ⅰ-Ⅱ-Ⅲ | 2 | ||
| Critical rate of rise of on-state current, Quadrant Ⅳ | dI/dt | 10 | A/μs | IG=2×IGT, Ⅳ | 2 | ||
| Peak gate current | IGM | 2 | A | 2 | |||
| Average gate power dissipation | PG(AV) | 0.5 | W | 2 | |||
| Peak gate power | PGM | 5 | W | 2 | |||
| Gate trigger current, Quadrants Ⅰ-Ⅱ-Ⅲ (option D) | IGT | 5 | mA | VD=12V, RL=33Ω | 2 | ||
| Gate trigger current, Quadrant Ⅳ (option D) | IGT | 10 | mA | VD=12V, RL=33Ω | 2 | ||
| Gate trigger voltage | VGT | 1.3 | V | Ⅰ-Ⅱ-Ⅲ-Ⅳ | 2 | ||
| Gate non-trigger voltage | VGD | 0.2 | V | VD=VDRM, Tj=125℃, RL=3.3kΩ, Ⅰ-Ⅱ-Ⅲ-Ⅳ | 2 | ||
| Holding current (option D) | IH | 10 | mA | IT=100mA | 2 | ||
| Latching current, Quadrants Ⅰ-Ⅲ-Ⅳ (option D) | IL | 10 | mA | IG=1.2IGT, Ⅰ-Ⅲ-Ⅳ | 2 | ||
| Latching current, Quadrant Ⅱ (option D) | IL | 20 | mA | IG=1.2IGT, Ⅱ | 2 | ||
| Critical rate of rise of off-state voltage (option D) | dV/dt | 20 | V/µs | VD=0.66×VDRM, Tj=125℃, gate open | 2 | ||
| On-state voltage | VTM | 1.6 | V | ITM=10A, tp=380μs, Tj=25℃ | 2 | ||
| Off-state leakage current IDRM | IDRM | 5 | µA | VDRM=VRRM, Tj=25℃ | 2 | ||
| Reverse leakage current IRRM | IRRM | 0.5 | mA | VDRM=VRRM, Tj=125℃ | 2 | ||
| Thermal resistance junction to case (AC), TO-252-4R | Rth(j-c) | 2 | ℃/W | junction to case (AC) | 3 |
CAD (KiCad official)
- Symbol:
BT137-800D - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files:
bt137-800d-etched.step/bt137-800d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bt137-800d.step/bt137-800d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WEIDA datasheet (8 pp, sha256
9460c02a1dda9654, 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).
# BT137-800D
**WEIDA** · Thyristors (SCR)/Modules · TO-252
BT137-800D from WEIDA, in a TO-252. 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, the current return side (RMS on-state current IT(RMS) 8 A, VDRM/VRRM 600/800 V). |
| 2 | T2 | passive | Main terminal T2 of the triac, the middle lead, which is also the tab (peak off-state and reverse voltage VDRM/VRRM 600/800 V). |
| 3 | G | input | Gate trigger input; IGT for the D grade is 5 mA max in quadrants I-II-III and 10 mA in quadrant IV, with VGT 1.3 V max (VD=12V, RL=33Ω). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WEIDA |
| Package | TO-252 |
| 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 | | | 800 | V | Tj=25℃ | 1 |
| Repetitive peak reverse voltage | VRRM | | | 800 | V | Tj=25℃ | 1 |
| Storage junction temperature range | Tstg | -40 | | 150 | ℃ | | 1 |
| Operating junction temperature range | Tj | -40 | | 125 | ℃ | | 1 |
| RMS on-state current | IT(RMS) | | | 8 | A | | 1 |
| Non repetitive surge peak on-state current | ITSM | | | 65 | A | full cycle, F=50Hz | 1 |
| I2t value for fusing | I2t | | | 21 | A2s | tp=10ms | 1 |
| Critical rate of rise of on-state current, Quadrants Ⅰ-Ⅱ-Ⅲ | dI/dt | | | 50 | A/μs | IG=2×IGT, Ⅰ-Ⅱ-Ⅲ | 2 |
| Critical rate of rise of on-state current, Quadrant Ⅳ | dI/dt | | | 10 | A/μs | IG=2×IGT, Ⅳ | 2 |
| Peak gate current | IGM | | | 2 | A | | 2 |
| Average gate power dissipation | PG(AV) | | | 0.5 | W | | 2 |
| Peak gate power | PGM | | | 5 | W | | 2 |
| Gate trigger current, Quadrants Ⅰ-Ⅱ-Ⅲ (option D) | IGT | | | 5 | mA | VD=12V, RL=33Ω | 2 |
| Gate trigger current, Quadrant Ⅳ (option D) | IGT | | | 10 | mA | VD=12V, RL=33Ω | 2 |
| Gate trigger voltage | VGT | | 1.3 | | V | Ⅰ-Ⅱ-Ⅲ-Ⅳ | 2 |
| Gate non-trigger voltage | VGD | 0.2 | | | V | VD=VDRM, Tj=125℃, RL=3.3kΩ, Ⅰ-Ⅱ-Ⅲ-Ⅳ | 2 |
| Holding current (option D) | IH | | | 10 | mA | IT=100mA | 2 |
| Latching current, Quadrants Ⅰ-Ⅲ-Ⅳ (option D) | IL | | | 10 | mA | IG=1.2IGT, Ⅰ-Ⅲ-Ⅳ | 2 |
| Latching current, Quadrant Ⅱ (option D) | IL | | | 20 | mA | IG=1.2IGT, Ⅱ | 2 |
| Critical rate of rise of off-state voltage (option D) | dV/dt | 20 | | | V/µs | VD=0.66×VDRM, Tj=125℃, gate open | 2 |
| On-state voltage | VTM | | | 1.6 | V | ITM=10A, tp=380μs, Tj=25℃ | 2 |
| Off-state leakage current IDRM | IDRM | | | 5 | µA | VDRM=VRRM, Tj=25℃ | 2 |
| Reverse leakage current IRRM | IRRM | | | 0.5 | mA | VDRM=VRRM, Tj=125℃ | 2 |
| Thermal resistance junction to case (AC), TO-252-4R | Rth(j-c) | | 2 | | ℃/W | junction to case (AC) | 3 |
## CAD (KiCad official)
- Symbol: `BT137-800D`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `bt137-800d-etched.step` / `bt137-800d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bt137-800d.step` / `bt137-800d.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [WEIDA datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944706864615424) (8 pp, sha256 `9460c02a1dda9654`, retrieved 2026-10-17, 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](docs/bt137-800d-datasheet.pdf)