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STMicroelectronics ACST610-8R
- Part No.:
- ACST610-8R
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-262-3 Short Leads, I2PAK
- Datasheet:
-
ACST610-8R.pdf
- Description:
- TRIAC SENS GATE 800V 6A I2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
ACST610-8R from STMicroelectronics is an overvoltage-protected AC switch (integrated triac + clamping device) in I²PAK package, rated for 6 A RMS on-state current and 800 V repetitive peak off-state voltage, with gate trigger current < 10 mA and clamping voltage ≥ 850 V at 25 °C - used for direct MCU-controlled static switching of universal motors and compressors in washing machines and refrigerators.
For engineers reviewing the ACST610-8R datasheet, ACST610-8R pinout, ACST610-8R application, or ACST610-8R equivalent, this device delivers self-protected AC mains switching without external snubbers, meets IEC 61000-4-4/4-5 immunity requirements, and enables compact, high-reliability appliance control designs with low gate drive power.
Technical Context
The ACST610-8R integrates a planar triac structure with an internal high-voltage crowbar clamping device that activates during line transients (e.g., IEC 61000-4-5 2 kV surge), folding back to conduction for energy dissipation while maintaining blocking capability after zero-crossing recovery.
It operates in all four quadrants with guaranteed IGT ≤ 10 mA at 25 °C and dV/dt immunity ≥ 500 V/µs at 125 °C (gate open), enabling robust triggering from microcontroller GPIOs via a single series resistor and eliminating need for optocoupler isolation in many cost-sensitive appliance designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 6 A - Supports continuous medium-power AC loads up to washing machine drum motors or fridge compressors. |
| VDRM / VRRM | 800 V - Blocks full AC mains peaks (e.g., 230 VAC × √2 ≈ 325 V) with >2× safety margin against line surges. |
| IGT (max) | 10 mA - Enables direct drive from standard MCU GPIO pins without buffer stages or high-current drivers. |
| VCL (min) | 850 V - Clamps transient overvoltages before destructive breakdown, satisfying IEC 61000-4-5 2 kV test compliance. |
| dV/dt (min) | 500 V/µs - Prevents false turn-on from fast line noise or commutation spikes, even at max junction temperature. |
| Rth(j-c) | 2.5 °C/W - Enables efficient thermal coupling to heatsink for sustained 6 A operation without derating in compact enclosures. |
| VTM (max) | 1.7 V @ 8.5 A - Limits conduction loss to <14.5 W at peak load, reducing thermal stress and PCB copper area requirements. |
Pinout & Package
I²PAK (TO-262) insulated package: thermally optimized for surface-mount or through-hole mounting with exposed metal tab for direct heatsink attachment; UL-recognized insulation not applicable (non-insulated variant); Rth(j-c) = 2.5 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G | Gate | Low-current trigger input (≤10 mA); referenced to COM; controls bidirectional conduction between OUT and COM. |
| OUT | Main output terminal (anode side) | Carries full load current (6 A RMS); connects to AC load (e.g., motor winding); electrically isolated from tab in insulated variants (not applicable here). |
| COM | Common terminal (cathode side) | Return path for load current; referenced to G for triggering; ties to AC mains neutral or return in typical bridge-connected configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated overvoltage protection | Self-protecting crowbar clamping eliminates need for external MOVs or RC snubbers in IEC 61000-4-5 compliant designs. |
| Planar triac technology | Ensures stable off-state leakage (<500 µA at 125 °C) and high reliability across 10k+ switching cycles under inductive load stress. |
| Quadrant I/II/III triggering | Enables full-wave AC control with single gate signal - no external polarity management required for universal motor direction or speed regulation. |
| High dI/dt immunity (100 A/µs) | Prevents commutation failure during inductive turn-off (e.g., compressor de-energization), avoiding false re-triggering or latch-up. |
| Low VT0 (0.9 V) at 125 °C | Maintains low conduction loss at elevated temperatures, improving thermal stability in sealed appliance enclosures. |
Applications
| Washing Machine Drum Control | Refrigerator Compressor Drive |
|---|---|
Use Scenario: Precise speed and direction control of universal motor driving washing machine drum during wash, rinse, and spin cycles. IC Role / Device Role / Timing Role: AC mains static switch replacing mechanical relays; triggered synchronously with zero-crossing detection for EMI reduction. Use Value: Eliminates relay wear-out, reduces acoustic noise, and enables variable-speed operation without external snubber components. |
Use Scenario: On/off control of hermetic compressor in refrigerator or air conditioner during thermostat-regulated cooling cycles. IC Role / Device Role / Timing Role: High-energy inductive load switch handling 6 A inrush and steady-state current; activated at zero-crossing to limit dI/dt stress. Use Value: Withstands compressor turn-off transients without external protection, meeting IEC 61000-4-5 Level 3 (2 kV) immunity without design overhead. |
| Induction Cooktop Fan Control | Industrial HVAC Blower Module |
Use Scenario: Thermal management fan switching in induction cooktops, operating continuously under high ambient temperature (>85 °C). IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical relays; handles resistive + light inductive load with high thermal cycling endurance. Use Value: Delivers >100,000 operations lifetime at 125 °C junction temperature, outperforming relays in reliability and size-constrained layouts. |
Use Scenario: Duty-cycle modulated blower control in commercial HVAC units requiring EMI-compliant AC switching and surge resilience. IC Role / Device Role / Timing Role: Mains-connected triac switch driven by microcontroller PWM with phase-angle or burst-fire modulation. Use Value: Maintains dV/dt immunity ≥500 V/µs at 125 °C, preventing false triggering from nearby contactor switching noise in shared electrical cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACST610-8G | D²PAK package; Rth(j-c) = 4.25 °C/W; 1.5 g weight; requires larger PCB footprint but offers better thermal performance on 1 cm² copper. | Better suited for higher ambient temperature environments (>70 °C) where heatsinking is limited to PCB copper only. | Select when board-level thermal management prioritizes copper-area efficiency over component height or mechanical mounting flexibility. |
| ACST610-8FP | TO-220FPAB insulated package; 2000 V RMS insulation rating; Rth(j-c) = 4.25 °C/W; creepage/clearance compliant for reinforced isolation. | Required where regulatory certification mandates reinforced insulation (e.g., Class I appliances with user-accessible metal chassis). | Select when safety agency approval (UL/EN 60335) demands galvanic isolation between mains and control circuitry. |
Compared with ACST610-8G and ACST610-8FP, the ACST610-8R provides optimal mechanical mounting versatility (I²PAK's dual-hole footprint supports both screw-down and clip-on heatsinks) and lowest thermal resistance among non-insulated variants, making it ideal for space-constrained, high-power-density appliance modules.
Availability
ACST610-8R is available at Aetrix Electronics and suitable for washing machine motor control, refrigerator compressor switching, and industrial HVAC blower modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ACST610-8R 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, digital, and mixed-signal ICs for automotive, industrial, and consumer applications.
The ACST6 series belongs to ST's Application-Specific Discrete (A.S.D.) power switch family, engineered specifically for reliable, snubberless AC mains control in home appliances and industrial equipment with integrated overvoltage ruggedness.
FAQ
Is ACST610-8R compatible with zero-crossing TRIAC driver ICs like MOC3021?
No - ACST610-8R is a self-protected AC switch with integrated clamping and does not require optocoupler isolation. It is designed for direct MCU GPIO drive using a simple series gate resistor (e.g., 330 Ω for 3.3 V logic). Using an optocoupler adds unnecessary complexity and latency, negating its low-IGT advantage.
Can ACST610-8R replace a standard 6 A triac like BT136 in existing designs?
Yes, with qualification - ACST610-8R has identical pinout (G, MT1/COM, MT2/OUT) and comparable IT(RMS)/VDRM ratings, but its internal clamping alters transient behavior. Existing snubber networks must be removed, and gate resistor value verified to ensure IGT remains within 10 mA limit under worst-case VCC and temperature conditions.
What is the maximum allowable case temperature for continuous 6 A operation?
Per Figure 3 in the datasheet, the ACST610-8R supports 6 A RMS at TC = 106 °C for TO-220AB/I²PAK/D²PAK packages. With its Rth(j-c) = 2.5 °C/W, sustained 6 A operation requires heatsink thermal resistance ≤ 12.2 °C/W to maintain Tj ≤ 125 °C at 25 °C ambient - verified via thermal simulation or IR measurement.
Does ACST610-8R meet RoHS and REACH compliance?
Yes - ACST610-8R is manufactured in ST's ECOPACK®-compliant I²PAK package, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full material declarations and compliance certificates are available via ST's quality portal using order code ACST610-8R.
ACST610-8R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ACS™/A.S.D®
- Package/Case:
- TO-262-3 Short Leads, I2PAK
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- 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:
- I2PAK
ACST610-8R FAQ
1.How can I place an order for ACST610-8R through Aetrix?
Please submit a Request for Quotation (RFQ) for ACST610-8R 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 ACST610-8R reliable?
The price and inventory of ACST610-8R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACST610-8R is usually 5 days.
3.What payment methods are accepted for ACST610-8R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACST610-8R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACST610-8R?
ACST610-8R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACST610-8R 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 ACST610-8R?
For technical support, including ACST610-8R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACST610-8R requirements.
6.How does Aetrix verify that ACST610-8R is sourced from the original manufacturer or authorized distributors?
All ACST610-8R 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 ACST610-8R meets industry standards.
7.What is the process for return or replacement of ACST610-8R?
All ACST610-8R units undergo pre-shipment inspection (PSI). If there is an issue with ACST610-8R, 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 ACST610-8R part is unused and in its original packaging.
Return procedure for ACST610-8R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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