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STMicroelectronics ACS110-7SN
- Part No.:
- ACS110-7SN
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ACS110-7SN.pdf
- Description:
- TRIAC SENS GATE 700V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:1,749
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Product details
Overview
ACS110-7SN from STMicroelectronics is a monolithic AC line switch in SOT-223 package, designed for direct microcontroller-driven static switching of 1 A resistive or inductive loads (e.g., solenoids, valves, fans) on 230 VAC mains. It features ±700 V blocking voltage, 1100 V avalanche clamping, <10 mA gate trigger current, and integrated gate driver with high noise immunity (dV/dt >500 V/µs).
For engineers reviewing the ACS110-7SN datasheet, ACS110-7SN pinout, ACS110-7SN application, or ACS110-7SN equivalent, this device serves as a robust, snubberless replacement for mechanical relays and discrete TRIAC/driver combinations in white goods control systems requiring IEC 61000-4-5 transient compliance and thermal reliability at 105 °C tab temperature.
Technical Context
The ACS110-7SN implements the ASD™ (Advanced Static Device) architecture: an integrated high-voltage switch combining a ruggedized thyristor structure with on-die avalanche clamping and gate-level shifter. It operates in quadrants II and III, triggered by negative gate current flowing out of the G pin.
Its turn-off commutation relies on controlled avalanche energy absorption (VCL = 1100 V, ICL = 1 mA), eliminating external snubbers or varistors. Thermal design is enabled by low Rth(j-l) = 20 °C/W (SOT-223) and direct mounting of multiple units to a shared copper cooling pad via the COM terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | ±700 V - Withstands full AC line transients without breakdown during off-state. |
| IT(RMS) | 1 A at Ttab = 105 °C - Sustains continuous load current without derating in compact SOT-223 footprint. |
| VCL | 1100 V typ - Clamps inductive turn-off energy safely, enabling snubberless operation up to 10 mJ. |
| IGT | <10 mA max - Compatible with standard MCU GPIOs via simple series resistor (e.g., 140 Ω @ 12 V). |
| dV/dt | >500 V/µs min - Immune to false triggering from fast line-edge noise in appliance EMI environments. |
| Rd | 300 mΩ max at Tj = 125 °C - Low conduction loss ensures <1.3 V on-state drop at 1.4 A peak. |
| I²t | 0.35 A²s - Supports surge withstand per IEC 61000-4-5 (2 kV pulse) without fuse coordination issues. |
Pinout & Package
SOT-223 package with exposed thermal tab (COM pin); 4-pin outline per STMicroelectronics mechanical drawing (Ref: ACS110-7SN/SB2, p.9). Pin 1 = G (Gate), Pin 2 = DRAIN (OUT), Pin 3 = SOURCE (COM), Pin 4 = DRAIN (OUT) - dual-drain configuration for enhanced current sharing and thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G | Gate input | Negative-current-triggered control node; connects directly to MCU GPIO via current-limiting resistor. |
| OUT (Pins 2 & 4) | Switch output | Dual-drain terminals carrying full load current; electrically tied internally, optimized for parallel PCB routing and thermal spreading. |
| COM | Common reference | Source terminal and thermal tab; must be connected to neutral line and large copper pour for heat dissipation (Rth(j-l) = 20 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated avalanche clamping | 1100 V clamping voltage absorbs inductive turn-off energy up to 10 mJ without external components. |
| Gate level shifter | Isolates MCU logic from 700 V main-line potential, eliminating gate kickback and enabling direct GPIO drive. |
| Snubberless operation | Meets IEC 61000-4-5 (2 kV) and IEC 335-1 without external RC snubber or MOV, reducing BOM count by up to 80 %. |
| Multi-unit thermal sharing | Multiple ACS110-7SN devices can share a single cooling pad via COM pins, simplifying thermal layout in multi-load controllers. |
| High dV/dt immunity | Static dV/dt >500 V/µs ensures reliable operation in noisy appliance environments with motor commutation and relay bounce. |
Applications
| Washing Machine Control | Dishwasher Solenoid Drive |
|---|---|
|
Use Scenario: Switching water inlet valves and detergent dispensers during cycle phases. IC Role / Device Role / Timing Role: AC line switch providing zero-crossing–free, fast turn-on/off control of 230 VAC solenoids (1 A RMS). Use Value: Eliminates mechanical relay wear and contact arcing; enables precise timing of fluid delivery without snubber-induced delay. |
Use Scenario: Driving drain pump and heating element in compact under-counter units. IC Role / Device Role / Timing Role: Solid-state replacement for 1 A TRIAC+driver, handling resistive (heater) and inductive (pump) loads on same board. Use Value: Reduces component count by 4 parts per channel and meets IEC 61000-4-5 surge immunity without layout compromises. |
| Refrigerator Defrost Heater | Microwave Oven Fan Control |
|
Use Scenario: Cycling 1 A defrost heater during compressor off-periods in frost-free units. IC Role / Device Role / Timing Role: High-reliability AC switch operating at ambient temperatures up to 70 °C near compressor compartment. Use Value: Sustains 125 °C junction temperature with 20 °C/W thermal resistance, ensuring >10-year lifetime under thermal cycling stress. |
Use Scenario: Controlling cooling fan speed and interlock circuits in microwave cavity assemblies. IC Role / Device Role / Timing Role: Noise-immune switch interfacing with 3.3 V/5 V microcontrollers in EMI-heavy RF environments. Use Value: 500 V/µs dV/dt immunity prevents false triggering from magnetron switching transients, improving system safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC line switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS108-7SN | Lower IT(RMS) = 0.8 A; identical VDRM, VCL, and pinout. | Rated for lighter loads (e.g., small solenoids, indicator lamps); reduced thermal margin at 105 °C tab. | Select when load current ≤0.8 A RMS and board space/thermal budget is constrained. |
| ACS120-7SN | Higher IT(RMS) = 1.2 A; same VDRM/VCL but increased Rth(j-l) = 22 °C/W due to larger die. | Supports higher surge currents (ITSM = 12 A @ 60 Hz); suitable for pumps with high inrush. | Choose for 1.2 A continuous loads or where IEC 61000-4-5 margin must exceed 2 kV with 10-cycle endurance. |
Compared with ACS108-7SN and ACS120-7SN, the ACS110-7SN delivers optimal balance of 1 A RMS capability, 20 °C/W thermal resistance, and proven snubberless operation in mainstream white goods-making it the default choice for cost-sensitive, high-volume appliance control boards.
Availability
ACS110-7SN is available at Aetrix Electronics and suitable for washing machine control, dishwasher solenoid drive, and refrigerator defrost heater applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.
Supply support for ACS110-7SN 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, specializing in power management, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.
The ACS™ AC line switch product line was engineered specifically for solid-state replacement of electromechanical relays in household appliances-delivering reliability, surge immunity, and integration to reduce system cost and improve safety certification success.
FAQ
What is the recommended gate drive circuit for ACS110-7SN?
Drive the G pin with a negative current sourced from a microcontroller GPIO through a series resistor. For 12 V logic, use a 140 Ω resistor to limit IGT to ≤10 mA. No pull-up or clamping diodes are needed-the internal gate structure handles reverse polarity and ESD protection. Ensure COM is connected to system ground/neutral before applying gate signal.
Can ACS110-7SN replace a mechanical relay in a 230 VAC, 1 A fan application?
Yes-ACS110-7SN is qualified for direct replacement of 1 A SPST relays in fan control. Its 1 A RMS rating at 105 °C tab temperature, 1100 V clamping, and 500 V/µs dV/dt immunity eliminate contact wear, arcing, and coil drive complexity. Mount on ≥5 cm² copper pour to maintain thermal performance.
Does ACS110-7SN require a heatsink for 1 A continuous operation?
No external heatsink is required if mounted on a minimum 5 cm² FR4 copper area (35 µm thick) acting as thermal pad. The SOT-223 package achieves Rth(j-a) = 60 °C/W and Rth(j-l) = 20 °C/W under these conditions, allowing safe 1 A RMS operation at ambient ≤50 °C with COM as thermal path.
How does ACS110-7SN handle inductive load turn-off without a snubber?
During turn-off, load current flows through the on-die avalanche diode, clamping voltage to 1100 V (VCL). Energy stored in the inductance (up to 10 mJ) is dissipated safely within the silicon. This eliminates need for external RC snubbers while meeting IEC 61000-4-5 2 kV surge testing on resistive and inductive loads.
ACS110-7SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ASD™
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Triac Type:
- Logic - Sensitive Gate
- Voltage - Off State:
- 700 V
- Current - On State (It (RMS)) (Max):
- 1 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 8A, 11A
- Current - Gate Trigger (Igt) (Max):
- 10 mA
- Current - Hold (Ih) (Max):
- 45 mA
- Configuration:
- Single
- Operating Temperature:
- -30°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
ACS110-7SN FAQ
1.How can I place an order for ACS110-7SN through Aetrix?
Please submit a Request for Quotation (RFQ) for ACS110-7SN 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 ACS110-7SN reliable?
The price and inventory of ACS110-7SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACS110-7SN is usually 5 days.
3.What payment methods are accepted for ACS110-7SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACS110-7SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACS110-7SN?
ACS110-7SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACS110-7SN 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 ACS110-7SN?
For technical support, including ACS110-7SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACS110-7SN requirements.
6.How does Aetrix verify that ACS110-7SN is sourced from the original manufacturer or authorized distributors?
All ACS110-7SN 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 ACS110-7SN meets industry standards.
7.What is the process for return or replacement of ACS110-7SN?
All ACS110-7SN units undergo pre-shipment inspection (PSI). If there is an issue with ACS110-7SN, 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 ACS110-7SN part is unused and in its original packaging.
Return procedure for ACS110-7SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ACS110-7SN Tags
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