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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 T2550-12I is a Snubberless Triac manufactured by STMicroelectronics, rated for an on-state RMS current of 25 A and a blocking voltage of 1200 V. It is housed in a TO-220AB insulated package with three pins for through-hole mounting. Key electrical parameters include a maximum gate trigger current (Igt) of 50 mA, a maximum gate trigger voltage (Vgt) of 1.3 V, and a peak gate power dissipation of 1 W. The device supports a surge current rating of 252 A and has a minimum holding current of 60 mA. It operates within a temperature range of -40°C to 125°C and complies with RoHS standards.
Feature Summary
- Snubberless design optimized for high noise immunity and dynamic commutation
- Suitable for controlling inductive, capacitive, or resistive loads
- UL recognized component under UL1557 standard
Applications
- Three-phase industrial applications
- Inductive load control
- Capacitive load control
- Resistive load control
Procurement Notes
Verify the specific suffix 'I' corresponds to the insulated TO-220AB package variant when sourcing. Confirm that the required gate trigger characteristics align with the 50 mA Igt specification. Ensure thermal management solutions are adequate for the 25 A RMS current rating in the intended enclosure environment.
Selection Notes
Select this component for high-voltage AC switching applications requiring robust commutation capabilities. The 1200 V rating makes it appropriate for 3-phase systems. Consider the insulated package for safety isolation requirements. Verify that the driving circuit can supply at least 50 mA to ensure reliable triggering under all operating conditions.
Part Context
The T2550-12I belongs to the T2550-12x family of Snubberless Triacs from STMicroelectronics. This family includes variants in D²PAK and non-insulated TO-220AB packages. The 'I' suffix specifically denotes the insulated version, providing enhanced isolation properties compared to standard TO-220AB configurations while maintaining identical electrical performance ratings.
Replacement Considerations
Other members of the T2550-12x family may serve as functional substitutes if package insulation is not critical. Non-insulated TO-220AB versions offer identical electrical specifications but lack the thermal isolation of the 'I' variant.
