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Product Detailed Parameters
- Description：TRIAC ALTERNSTR 1.2KV 25A TO220
- Series：Snubberless™
- Mfr：STMicroelectronics
- Package：Tube
- Triac Type：Alternistor - Snubberless
- Voltage - Off State：1.2 kV
- Current - On State (It (RMS)) (Max)：25 A
- Voltage - Gate Trigger (Vgt) (Max)：1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm)：240A, 252A
- Current - Gate Trigger (Igt) (Max)：50 mA
- Current - Hold (Ih) (Max)：60 mA
- Configuration：Single
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The T2550-12T is a snubberless triac from STMicroelectronics, rated for 25 A on-state RMS current and 1200 V blocking voltage. Housed in a TO-220AB package, this component is designed for high-voltage industrial applications. It features high static and dynamic commutation capabilities with a gate trigger current (I_GT) of 50 mA. The device offers noise immunity suitable for controlling inductive, capacitive, or resistive loads. It is recognized under UL standard 1557, reference file E81734.
Feature Summary
- Snubberless design eliminates the need for external RC networks
- High noise immunity and dynamic commutation for reliable switching
- Suitable for three-phase industrial applications due to 1200 V rating
Applications
- Three-phase industrial motor control
- Inductive load switching
- Capacitive load control
- Resistive load regulation
Procurement Notes
Verify the specific ordering code against the manufacturer's official datasheet to ensure the correct package variant. Confirm that the TO-220AB configuration matches the thermal and mechanical requirements of the target assembly. Cross-reference the UL recognition file number for compliance documentation needs.
Selection Notes
Select this component when a 1200 V blocking voltage is required for three-phase systems. Ensure the application demands a 25 A RMS current capacity. Verify that the 50 mA gate trigger current aligns with the driving circuit's output capability. Consider the TO-220AB package for through-hole mounting constraints.
Part Context
This part belongs to the T2550-12x series, which includes variants in D²PAK and insulated TO-220AB packages. The series is characterized by its snubberless technology and high endurance reliability. It is distinct from lower voltage triacs like the T1210T series, offering higher blocking voltage for more demanding industrial environments.
Replacement Considerations
Direct substitutes must match the 25 A / 1200 V specification and TO-220AB package. Verify pinout compatibility and thermal resistance values. Check if alternative manufacturers offer equivalent snubberless triacs with similar I_GT ratings.
