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Product Detailed Parameters
- Description：TRIAC ALTERNISTOR 800V 12A TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Triac Type：Alternistor - Snubberless
- Voltage - Off State：800 V
- Current - On State (It (RMS)) (Max)：12:00 AM
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Non Rep. Surge 50, 60Hz (Itsm)：120A, 125A
- Current - Gate Trigger (Igt) (Max)：100 mA
- Current - Hold (Ih) (Max)：100 mA
- Configuration：Single
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The TXDV812RG is a high-voltage Triac from the TXDVxx12 series, utilizing alternistor technology for power control in three-phase grids. It features an on-state current of 12 A and a maximum blocking voltage of 800 V. The device supports a gate trigger current up to 100 mA and offers commutation capability up to 42.5 A/ms at 10 V/µs. Noise immunity reaches 2 kV/µs, while the insulated package provides 2,500 V rms isolation. Operating junction temperature ranges from -40 °C to +125 °C.
Feature Summary
- Alternistor technology providing high commutation levels and surge current capability
- Insulated TO-220AB package with 2,500 V rms electrical isolation
- High noise immunity rated at 2 kV/µs
Applications
- Heating systems
- Motor starters
- Induction motor speed control (especially for fans)
Procurement Notes
Verify the specific ordering code TXDV812RG against official STMicroelectronics documentation to confirm the 800 V rating and tube delivery mode. Ensure that the TO-220AB insulated package dimensions and recommended mounting torque align with the system design requirements before finalizing procurement.
Selection Notes
Select this component when designing circuits requiring robust performance in three-phase power grids with inductive or resistive loads. The 800 V blocking voltage suits applications where lower voltage ratings than the 1200 V variant are sufficient. Consider the thermal resistance values and case temperature limits to ensure reliable operation within the specified industrial temperature range.
Part Context
This part belongs to the TXDVxx12 series of 12 A high-voltage Triacs manufactured by STMicroelectronics. The series includes variants with different blocking voltages, such as the TXDV1212RG which offers 1200 V. All devices share the same alternistor technology and physical package specifications.
Replacement Considerations
The TXDV1212RG serves as a direct substitute within the same series, offering identical current ratings but with a higher 1200 V blocking voltage. Verify that the increased voltage rating does not impact cost or availability constraints in the target application.
FAQ
What is the maximum non-repetitive surge peak on-state current?
For a pulse duration of 2.5 ms at an initial junction temperature of 25 °C, the maximum non-repetitive surge peak on-state current is 170 A.
How is the insulation voltage defined for this device?
The insulation rms voltage is 2,500 V, measured between the A1, A2, and gate terminals to the case for one minute.
What is the critical rate of rise of on-state current?
The critical rate of rise of on-state current (dI/dt)c is 100 A/µs, tested with a gate current of 500 mA and a gate current rise rate of 1 A/µs at 50 Hz.
