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Product Detailed Parameters
- Description：TRIAC SENS GATE 800V 4A TO220FP
- Series：ASD™
- Mfr：STMicroelectronics
- Package：Tube,Tube
- Triac Type：Logic - Sensitive Gate
- Voltage - Off State：800 V
- Current - On State (It (RMS)) (Max)：4:00 AM
- Voltage - Gate Trigger (Vgt) (Max)：1 V
- Current - Non Rep. Surge 50, 60Hz (Itsm)：30A, 33A
- Current - Gate Trigger (Igt) (Max)：10 mA
- Current - Hold (Ih) (Max)：20 mA
- Configuration：Single
- Operating Temperature：-
- Mounting Type：Through Hole
- Package / Case：TO-220-3 Full Pack
- Supplier Device Package：TO-220FP
- Grade：-
- Qualification：-
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Overview
The ACST4-8SFP is a standard TRIAC from the ASD series manufactured by STMicroelectronics. It features an 800 V blocking voltage and supports a maximum RMS on-state current of 4 A. The device is housed in a TO-220FP insulated package suitable for through-hole mounting. Key electrical parameters include a maximum gate trigger current of 25 mA, a holding current of 35 mA, and a non-repetitive surge current rating of 30 A at 50 Hz. It complies with RoHS 3 standards and has a moisture sensitivity level of 1.
Feature Summary
- Integrates a high-voltage clamping device to absorb inductive turn-off energy and withstand line transients per IEC 61000-4-5.
- Provides high static dV/dt immunity exceeding 1000 V/μs to ensure reliability against fast transient bursts (IEC 61000-4-4).
- Utilizes planar technology for high off-state reliability without requiring external overvoltage protection components.
Applications
- Home appliances
- Industrial systems
- Universal motor drives
Procurement Notes
Verify component authenticity via manufacturer channels as this part may be subject to obsolescence. Confirm package integrity and pin alignment upon receipt. Ensure storage conditions maintain the specified moisture sensitivity level. Cross-reference datasheet revisions to confirm parameter consistency before finalizing procurement orders.
Selection Notes
Select this component for AC load switching applications requiring robust transient immunity and integrated overvoltage protection. Verify that the 4 A RMS current rating meets the load requirements. Ensure the control circuit can provide the necessary gate trigger current. Consider thermal management solutions appropriate for the TO-220FP package in the final design.
Part Context
This device belongs to the ACST4 series within the ACS/ACST power switch family. These devices are designed for home appliances and industrial systems, driving loads up to 4 A. The series combines Triac structures with high-voltage clamping capabilities to enhance system reliability and reduce passive component count.
Replacement Considerations
Check for direct substitutes within the ACST4 series or compatible TRIACs with matching 800 V and 4 A ratings. Verify pinout compatibility and thermal characteristics. Consult official replacement lists for end-of-life notifications.
