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Product Detailed Parameters
- Description：TRIAC SENS GATE 500V 0.8A SOT223
- Series：ACS™/A.S.D®
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Triac Type：Logic - Sensitive Gate
- Voltage - Off State：500 V
- Current - On State (It (RMS)) (Max)：800 mA
- Voltage - Gate Trigger (Vgt) (Max)：1 V
- Current - Non Rep. Surge 50, 60Hz (Itsm)：7.3A, 8A
- Current - Gate Trigger (Igt) (Max)：10 mA
- Current - Hold (Ih) (Max)：25 mA
- Configuration：Single
- Operating Temperature：-30°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
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Overview
The ACS108-5SN is an overvoltage protected AC switch built with ASD technology, packaged in SOT-223. It features a repetitive peak off-state voltage of 500V and an RMS on-state current of 0.8A at Tamb = 75°C. The device includes an integrated gate level shifter driver and triggers via negative gate current (IGT max 10mA). It withstands non-repetitive surge currents up to 8A at 60Hz and clamps voltages to approximately 600V. Operating junction temperature ranges from -30°C to +125°C.
Feature Summary
- Integrated overvoltage crowbar structure absorbs inductive turn-off energy without external protection.
- Gate level shifter driver separates the digital controller from the main switch.
- High noise immunity against static dV/dt and IEC 61000-4-4 burst requirements.
- Common package tab connection supports parallel connection of multiple switches.
Applications
- AC on-off static switching in appliance control systems
- Drive of low power high inductive loads like solenoids and valves
- Drive of resistive loads like fans and micro-motors
Procurement Notes
Verify component authenticity through authorized STMicroelectronics distributors or verified supply chain channels. Confirm the specific ordering suffix matches the required packaging format. Review the official datasheet for any recent product discontinuation notices or process change notifications prior to finalizing procurement plans.
Selection Notes
Select this component for applications requiring direct microcontroller interface without external snubber circuits. Ensure the load current does not exceed 0.8A RMS under specified thermal conditions. Verify that the system can accommodate the negative gate triggering current requirement for proper switching operation.
Part Context
This part belongs to the ACS108 family of AC line switches utilizing ASD technology. It provides integrated protection against overvoltage transients and inductive kickback. The SOT-223 package allows for efficient thermal management and simplified PCB layout compared to traditional discrete thyristor solutions.
Replacement Considerations
ACS108-6SN: Offers higher blocking voltage rating of 600V while maintaining similar current capabilities.
FAQ
How is the ACS108-5SN triggered?
It is triggered by a negative gate current flowing out of the gate pin, allowing direct interface with digital controllers.
Does the device require external overvoltage protection?
No, it embeds a high voltage clamping structure to absorb inductive turn-off energy and withstand line transients.
What is the maximum surge current capability?
The non-repetitive surge peak on-state current is 8A at 60Hz with an initial junction temperature of 25°C.
