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The Jiangsu Weida Semiconductor BT138 Series 12A Triacs are designed for middle and small resistance type power loads, featuring low holding and latching current. These triacs are suitable for various power control applications.
| Parameter | Symbol | Value | Unit | Notes |
| Storage junction temperature range | Tstg | -40~150 | ||
| Operating junction temperature range | Tj | -40~125 | ||
| Repetitive peak off-state voltage (Tj=25) | VDRM | 600/800 | V | |
| Repetitive peak reverse voltage (Tj=25) | VRRM | 600/800 | V | |
| RMS on-state current | IT(RMS) | 12 | A | |
| Non repetitive surge peak on-state current (full cycle, F=50Hz) | ITSM | 120 | A | |
| I2t value for fusing (tp=10ms) | I2t | 45 | A2s | |
| Critical rate of rise of on-state current (IG=2IGT) | dI/dt | 50 (--), 10 () | A/s | |
| Peak gate current | IGM | 2 | A | |
| Average gate power dissipation | PG(AV) | 0.5 | W | |
| Peak gate power | PGM | 5 | W | |
| RMS on-state current | IT(RMS) | 12 | A | |
| VDRM, VRRM | 600/800 | V | ||
| IGT (Quadrant --, MAX) | 10 (D), 5 (E), 25 (F), 50 (G) | mA | VD=12V, RL=33 | |
| IGT (Quadrant , MAX) | 10 (D), 25 (E), 70 (F), 100 (G) | mA | VD=12V, RL=33 | |
| VGT (MAX) | 1.3 | V | ||
| VGD (MIN) | 0.2 | V | VD=VDRM, Tj=125 | |
| IH (MAX) | 10 (--), 40 (), 30 (-) | mA | IT=100mA | |
| IL (MAX) | 30 (-), 40 () | mA | IG=1.2IGT | |
| dV/dt (MIN) | 200 (--), 500, 1000 | V/s | VD=2/3VDRM, Tj=125, Gate open | |
| VTM (MAX) | 1.6 | V | ITM=15A, tp=380s, Tj=25 | |
| IDRM, IRRM (MAX) | 5 A (Tj=25), 1 mA (Tj=125) | VDRM= VRRM | ||
| Rth(j-c) (TO-252-4R) | 1.8 | /W | junction to case(AC) | |
| Rth(j-c) (TO-220B(Non-Ins)/ TO-220C) | 1.5 | /W | junction to case(AC) | |
| Rth(j-c) (TO-220F) | 2.5 | /W | junction to case(AC) | |
| Rth(j-c) (TO-263) | 1.5 | /W | junction to case(AC) |
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