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BT137
Public Made by Adomby adom
JUXING Thyristors (SCR)/Modules, TO-252. 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
markdownBT137
JUXING · Thyristors (SCR)/Modules · TO-252
BT137 from JUXING, 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 datasheet lists it as PIN1 and the symbol shows it opposite T2. |
| 2 | T2 | passive | Main terminal T2 of the triac, on pin 2 and the tab; blocks up to VDRM/VRRM of 800 V and carries IT(RMS) of 8 A. |
| 3 | G | input | Gate trigger input; IGT is at most 35 mA in quadrants I, II and III and at most 80 mA in quadrant IV, with peak gate current IGM of 1 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JUXING |
| 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/VRRM | 800 | V | 1 | |||
| RMS on-state current | IT(RMS) | 8 | A | full sine wave | 1 | ||
| Non repetitive surge peak on-state current | ITSM | 40 | A | full sine wave, Tj=25℃, t=20ms | 1 | ||
| Non repetitive surge peak on-state current | ITSM | 42 | A | full sine wave, Tj=25℃, t=16.7ms | 1 | ||
| Peak gate current | IGM | 1 | A | 1 | |||
| I2t for fusing | I2t | 8 | A2S | t=10ms | 1 | ||
| Average gate power dissipation | PG(AV) | 0.1 | W | Tj=125℃ | 1 | ||
| Peak gate power | PGM | 5 | W | 1 | |||
| Repetitive rate of rise of on-state current after triggering | Dit/dt | 40 | A/µs | 1 | |||
| Junction temperature | Tj | -40 | 125 | ℃ | 1 | ||
| Storage temperature | Tstg | -40 | 150 | ℃ | 1 | ||
| Thermal resistance from junction to ambient | RθJA | 70 | ℃/W | 1 | |||
| Gate trigger current | IGT | 35 | mA | VD=12V;RL=100Ω; Quadrant I, II, III | 2 | ||
| Gate trigger current | IGT | 80 | mA | VD=12V;RL=100Ω; Quadrant IV | 2 | ||
| Gate trigger voltage | VGT | 1.5 | V | VD=12V;RL=100Ω; Quadrant I, II, III | 2 | ||
| Non-triggering gate voltage | VGD | 0.2 | V | Tj=125℃; Quadrant I, II, III | 2 | ||
| Holding current | IH | 60 | mA | IT=0.5A | 2 | ||
| Thyristor holds up current | IL | 20 | mA | IG=1.2IGT | 2 | ||
| Thyristor holds up current | IL | 100 | mA | IG=1.2IGT | 2 | ||
| Critical rise rate of off-state voltage | dV/dt | 500 | V/µs | VD=67%VDRM(max); Tj=125℃ | 2 |
CAD (KiCad official)
- Symbol:
BT137 - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files:
bt137-etched.step/bt137-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bt137.step/bt137.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JUXING datasheet (3 pp, sha256
5a52d7dd8a977794, retrieved 2026-10-19, 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).