SST12B-800CW vs SST12A-800CW
| Part Number |
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| Category | Thyristors - TRIACs | Thyristors - TRIACs |
| Manufacturer | SMC Diode Solutions | SMC Diode Solutions |
| Description | 800V 12A PACKAGE TO-220B 3-QUADR | 800V 12A PACKAGE TO-220A 3-QUADR |
| Package | -Reel® | Tube |
| Series | SST12 | SST12 |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | TO-220-3 | TO-220-3 |
| Supplier Device Package | TO-220B | TO-220AIns |
| Configuration | Single | Single |
| Current - Hold (Ih) (Max) | 40 mA | 40 mA |
| Voltage - Off State | 800 V | 800 V |
| Voltage - Gate Trigger (Vgt) (Max) | 1.3 V | 1.3 V |
| Current - Gate Trigger (Igt) (Max) | 35 mA | 35 mA |
| Current - On State (It (RMS)) (Max) | 12 A | 12 A |
| Current - Non Rep. Surge 50, 60Hz (Itsm) | 120A @ 50Hz | 120A @ 50Hz |
| Triac Type | Standard | Standard |
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1. What are the main uses of TRIACs?
TRIACs are commonly used in phase control applications like light dimmers, motor speed controls, and heaters, as well as in domestic appliances where bidirectional AC control is needed.
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2. Why do TRIACs require a DIAC for triggering?
DIACs improve the symmetry of TRIAC firing by ensuring consistent triggering voltages in both directions. This reduces harmonic distortion in AC circuits, enhancing performance.
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3. Why are TRIACs preferred in household electronics?
TRIACs are compact, cost-effective, and capable of handling bidirectional current, making them ideal for small, lightweight, and reliable household devices.
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4. How does dv/dt affect TRIAC performance?
A high rate of voltage change (dv/dt) across the TRIAC can unintentionally trigger it. Snubber circuits are used to limit dv/dt and ensure reliable operation.
