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Product Detailed Parameters
- Description：TRIAC SENS GATE 800V 4A DPAK
- Series：ASD™
- Mfr：STMicroelectronics
- Package：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：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：DPAK
- Grade：-
- Qualification：-
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Overview
The ACST4-8SB is a logic-sensitive gate TRIAC from the ASD series, manufactured by STMicroelectronics. It features an 800 V off-state voltage and supports a maximum RMS on-state current of 4 A. The device is housed in a DPAK (TO-252-3) surface-mount package with two leads and a tab. Key electrical parameters include a maximum gate trigger current of 10 mA and a holding current of 20 mA. Non-repetitive surge currents are rated at 30 A for 50 Hz and 33 A for 60 Hz frequencies.
Feature Summary
- Integrates a high-voltage clamping device to absorb inductive turn-off energy and withstand line transients per IEC 61000-4-5 standards.
- Designed for low gate current activation (IGT < 10 mA) while maintaining high electrical noise immunity compliant with IEC 61000-4-4 fast transient burst tests.
- Utilizes planar technology to ensure high off-state reliability without requiring external overvoltage protection components.
Applications
- Home appliances
- Industrial systems
- Loads up to 4 A
Procurement Notes
Verify component status as the ACST4-8SB is listed as discontinued. Confirm availability through authorized distributors or secondary markets if sourcing is required. Ensure compliance with RoHS3 specifications and check for moisture sensitivity level 1 classification during handling. Validate that the DPAK package matches the design footprint requirements.
Selection Notes
Select this component for applications requiring logic-level gate triggering with low current demands. The integrated overvoltage protection simplifies circuit design by eliminating the need for external snubber circuits in specific conditions. Consider the 800 V rating for general AC switching tasks where moderate surge capability is sufficient.
Part Context
This part belongs to the ACST4 series within the ACS/ACST power switch family. These devices are engineered for home appliances and industrial systems, driving loads up to 4 A. The series combines Triac structures with built-in protection against line transients, offering a robust solution for AC switching applications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. As the component is discontinued, alternative selection should focus on compatible logic-sensitive TRIACs with similar voltage and current ratings from other manufacturers or newer STMicroelectronics series.
