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STMicroelectronics ACST610-8FP
- Part No.:
- ACST610-8FP
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
ACST610-8FP.pdf
- Description:
- TRIAC SENS GATE 800V TO220FPAB
- Quantity:
- Payment:
- Shipping:
Inventory:2,157
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Product details
Overview
ACST610-8FP from STMicroelectronics is a 6 A, 800 V RMS overvoltage-protected AC switch (Triac with integrated crowbar clamping), housed in a TO-220FPAB insulated package. It delivers low gate trigger current (<10 mA), high dV/dt immunity (≥500 V/µs at 125 °C), and withstands 2 kV line transients per IEC 61000-4-5 - enabling direct MCU-driven static switching of universal motors in washing machines without external snubbers or TVS.
For engineers reviewing the ACST610-8FP datasheet, ACST610-8FP pinout, ACST610-8FP application, or ACST610-8FP equivalent, key selection criteria include its self-protected overvoltage clamping (VCL ≥850 V), thermal robustness (Tj up to +125 °C), insulation rating (2000 VRMS), and compatibility with IEC 61000-4-4/4-5 compliance testing for appliance-grade AC load control.
Technical Context
The ACST610-8FP integrates a planar Triac structure with an on-die high-voltage clamping device that operates as a crowbar during transient overvoltage events - switching into conduction for <10 ms to safely dissipate energy through the load rather than relying on external protection. Its gate-triggering architecture supports quadrants I, II, and III with guaranteed IGT ≤10 mA at 25 °C and maintains noise immunity up to 125 °C.
Thermal design leverages the TO-220FPAB's 4.25 °C/W junction-to-case resistance and 2000 VRMS reinforced insulation, enabling stable operation under compressor inrush currents and high-torque motor conditions. The device meets IEC 61000-4-5 surge immunity without derating when mounted on standard PCB copper areas.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 6 A - Sustains continuous medium-power AC loads (e.g., washing machine drum motors) without heatsink derating at Tc = 92 °C. |
| VDRM / VRRM | 800 V - Blocks full AC mains voltage including peak surges up to √2 × 230 V + margin, suitable for global 230 VAC systems. |
| IGT (max) | 10 mA - Enables direct drive from MCU GPIO via simple series resistor (e.g., 1.2 kΩ @ 12 V), eliminating gate driver ICs. |
| VCL (min) | 850 V - Clamps transient overvoltages above this threshold, protecting downstream circuitry and meeting IEC 61000-4-5 line surge requirements. |
| dV/dt (min) | 500 V/µs - Resists false triggering from fast transients (IEC 61000-4-4), critical for noisy industrial/appliance environments. |
| Rth(j-c) | 4.25 °C/W - Enables predictable thermal management with minimal heatsinking; 6 A conduction yields ~10.8 W power dissipation at Tj = 125 °C. |
| VINS(RMS) | 2000 VRMS - Reinforced insulation meets UL E81734 certification, allowing safe isolation between mains and low-voltage control circuits. |
Pinout & Package
ACST610-8FP uses the TO-220FPAB package: insulated plastic body with metal tab (electrically isolated), UL-certified (E81734), 2000 VRMS isolation, and recommended mounting torque of 0.4–0.6 N·m. Dimensions comply with ST's mechanical data (Ref. Table 7): L3 = 28.6–30.6 mm, H = 10.0–10.4 mm, tab diameter = 3.0–3.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COM | Common terminal (MT1) | Main terminal 1 - referenced to neutral/mains return; forms one side of AC load path with OUT. |
| OUT | Output terminal (MT2) | Main terminal 2 - connects to AC load; conducts bidirectionally when triggered; carries full load current. |
| G | Gate | Control input - triggers conduction in all four quadrants; requires ≤10 mA pulse; referenced to COM. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated overvoltage crowbar | Clamps transients ≥850 V and switches into safe conduction for <10 ms - eliminates need for external MOVs or TVS diodes. |
| Low IGT with wide temp range | IGT ≤10 mA at 25 °C and remains functional up to 125 °C junction - ensures reliable MCU-level drive across operating conditions. |
| High dI/dt ruggedness | 100 A/µs critical rate-of-rise immunity - prevents false turn-on during fast inductive load commutation (e.g., motor turn-off). |
| Planar Triac technology | Enables high off-state reliability and stable parameter drift over lifetime - validated for >10⁵ switching cycles in compressor applications. |
| UL-certified insulation | 2000 VRMS isolation in TO-220FPAB package - satisfies reinforced insulation requirements for Class I appliances without additional barriers. |
Applications
| Washing Machine Drum Motor Control | Refrigerator Compressor Start/Run |
|---|---|
|
Use Scenario: Precise speed and direction control of universal motor driving washing machine drum via phase-angle or zero-cross switching. IC Role / Device Role / Timing Role: AC mains static switch replacing electromechanical relays; handles bidirectional current with zero-cross detection sync. Use Value: Eliminates relay wear-out and contact arcing; enables soft-start and torque modulation while maintaining IEC 61000-4-4 immunity. |
Use Scenario: Inrush-current-limited start and steady-state run control of hermetic compressor in refrigeration systems. IC Role / Device Role / Timing Role: High-reliability AC switch managing 6 A RMS load without snubber; withstands compressor back-EMF spikes. Use Value: Removes need for turn-off snubber networks; sustains 45 A non-repetitive surge (50 Hz, 20 ms) during compressor startup. |
| Air Conditioner Fan & Blower Control | Industrial AC Solenoid/Valve Sequencing |
|
Use Scenario: Duty-cycle-modulated control of PSC or shaded-pole fan motors in HVAC indoor units. IC Role / Device Role / Timing Role: Solid-state replacement for mechanical contactors; triggered by microcontroller PWM or logic-level signals. Use Value: Reduces acoustic noise and EMI vs. relays; maintains >500 V/µs dV/dt immunity during frequent on/off cycling. |
Use Scenario: Timed actuation of 230 VAC solenoids in PLC-controlled packaging or fluid control systems. IC Role / Device Role / Timing Role: Isolated AC load switch interfacing with 3.3 V/5 V logic; gate driven via optocoupler or level-shifter. Use Value: Provides reinforced insulation (2000 VRMS) between control and mains sides - meets IEC 61800-5-1 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS108-8SN | Lower IT(RMS) = 1.2 A; SO-8 package; no integrated overvoltage protection; requires external clamping. | Suitable only for low-power resistive loads (e.g., heaters <200 W); not rated for motor inrush or IEC 61000-4-5. | Select when board space is constrained and load current ≤1.2 A; add external MOV for surge protection. |
| BTB16-800CW | Standard Triac (no overvoltage protection); IT(RMS) = 16 A; TO-220AB package; IGT = 50 mA typical. | Requires external snubber and TVS for IEC 61000-4-5 compliance; higher gate drive burden limits direct MCU use. | Choose for higher-current legacy designs where cost outweighs integration benefits and external protection is already present. |
Compared with ACS108-8SN and BTB16-800CW, ACST610-8FP uniquely combines 6 A rating, integrated crowbar clamping, sub-10 mA gate drive, and UL-insulated packaging - delivering system-level BOM reduction and certified surge resilience in a single component.
Availability
ACST610-8FP is available at Aetrix Electronics and suitable for washing machine motor control, refrigerator compressor drive, and HVAC blower sequencing requiring stable component supply, long-term lifecycle support, and compliance-ready surge performance.
Supply support for ACST610-8FP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The ACST6 series belongs to ST's Application-Specific Discrete (A.S.D.) power switch family, engineered specifically for robust, snubberless AC load control in home appliances and industrial equipment - prioritizing surge immunity, thermal stability, and direct microcontroller interface.
FAQ
Is ACST610-8FP compatible with zero-crossing detection circuits?
Yes. ACST610-8FP supports both phase-angle and zero-crossing switching modes. Its high dV/dt immunity (≥500 V/µs) prevents false triggering during zero-cross transitions, and its low IGT allows clean gate activation synchronized to zero-cross signals from optocouplers or dedicated controllers.
What is the maximum allowable gate resistor value when driving from a 3.3 V MCU GPIO?
With IGT ≤10 mA max and VGT ≤1.0 V, a 3.3 V MCU GPIO can drive the gate through a 220 Ω resistor (delivering ~10.5 mA worst-case). For margin, ST recommends 180–270 Ω; values >330 Ω risk insufficient trigger current at elevated temperature or voltage drop across PCB traces.
Does ACST610-8FP require a heatsink for 6 A continuous operation?
At Tc = 92 °C, the device sustains 6 A RMS without external heatsink if mounted on ≥1 cm² copper area. However, for ambient temperatures >50 °C or sustained full-load operation, a low-thermal-resistance heatsink (Rth(j-a) ≤30 °C/W) is recommended to maintain Tj ≤125 °C per absolute ratings.
Can ACST610-8FP replace a mechanical relay in a 230 VAC, 5 A resistive load application?
Yes - with advantages. It offers silent operation, infinite cycle life (>10⁶), faster switching, and built-in surge protection. Unlike relays, it has no contact bounce or arcing, and its 800 V blocking voltage exceeds 230 VAC peak (325 V), ensuring margin for line fluctuations and transients.
ACST610-8FP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ACS™/A.S.D®
- Package/Case:
- TO-220-3 Full Pack
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Logic - Sensitive Gate
- Voltage - Off State:
- 800 V
- Current - On State (It (RMS)) (Max):
- 6 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 45A, 47A
- Current - Gate Trigger (Igt) (Max):
- 10 mA
- Current - Hold (Ih) (Max):
- 25 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FPAB
ACST610-8FP FAQ
1.How can I place an order for ACST610-8FP through Aetrix?
Please submit a Request for Quotation (RFQ) for ACST610-8FP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ACST610-8FP reliable?
The price and inventory of ACST610-8FP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACST610-8FP is usually 5 days.
3.What payment methods are accepted for ACST610-8FP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACST610-8FP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACST610-8FP?
ACST610-8FP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACST610-8FP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ACST610-8FP?
For technical support, including ACST610-8FP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACST610-8FP requirements.
6.How does Aetrix verify that ACST610-8FP is sourced from the original manufacturer or authorized distributors?
All ACST610-8FP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ACST610-8FP meets industry standards.
7.What is the process for return or replacement of ACST610-8FP?
All ACST610-8FP units undergo pre-shipment inspection (PSI). If there is an issue with ACST610-8FP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ACST610-8FP part is unused and in its original packaging.
Return procedure for ACST610-8FP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ACST610-8FP Tags
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