SST12B-800CW vs SST08A-800BW
| 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 8A PACKAGE TO-220A 3-QUADRA |
| Package | -Reel® | Cut Tape (CT) |
| Series | SST12 | SST08 |
| 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 | 60 mA |
| Voltage - Off State | 800 V | 800 V |
| Voltage - Gate Trigger (Vgt) (Max) | 1.3 V | 1.5 V |
| Current - Gate Trigger (Igt) (Max) | 35 mA | 50 mA |
| Current - On State (It (RMS)) (Max) | 12 A | 8 A |
| Current - Non Rep. Surge 50, 60Hz (Itsm) | 120A @ 50Hz | 80A @ 50Hz |
| Triac Type | Standard | Standard |
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1. What is a TRIAC, and how does it differ from an SCR?
A TRIAC is a bidirectional device that can control AC power, effectively working as two SCRs in parallel but in opposite directions. Unlike an SCR, which only conducts in one direction, a TRIAC operates in both directions, making it ideal for AC applications.
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2. 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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3. 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.
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4. What are the key parameters to consider when selecting a TRIAC?
Important factors include voltage and current ratings, dv/dt capability, gate sensitivity, and application-specific requirements like power dissipation and thermal management.
