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STMicroelectronics ACS102-5T1
- Part No.:
- ACS102-5T1
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ACS102-5T1.pdf
- Description:
- TRIAC SENS GATE 500V 0.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,632
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Product details
Overview
ACS102-5T1 from STMicroelectronics is an AC line switch in SO-8 package, designed for full-cycle ON/OFF static switching of low-power inductive and resistive loads up to 0.2 A RMS (230 V AC), with 500 V repetitive peak off-state voltage, 600 V clamping voltage, and gate-triggering current < 5 mA. It integrates a high-voltage clamping structure and gate-level shifter driver, enabling direct microcontroller interface in appliance control systems.
For engineers reviewing the ACS102-5T1 datasheet, ACS102-5T1 pinout, ACS102-5T1 application, or ACS102-5T1 equivalent, this device supports IEC61000-4-5 surge immunity, eliminates external overvoltage protection, reduces component count by up to 80%, and allows multi-device mounting on a shared cooling pad via COM pins.
Technical Context
The ACS102-5T1 implements the ASD™ architecture with integrated avalanche clamping diode and gate-level shifter, enabling safe turn-off energy absorption (up to ~20 mJ) from inductive loads like solenoids and valves without snubber circuits. Its negative gate trigger current (flowing out of pin G) ensures isolation between digital controller and AC mains.
Thermal design leverages dual COM pins for heatsinking: Rth(j-l) = 60 °C/W with 40 mm² copper under COM pins, and creepage distance ≥3.5 mm from OUT to other pins meets IEC335-1 requirements. The SO-8 variant supports parallel mounting on shared PCB pads for thermal and layout efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM/VRRM | 500 V - Sustains repetitive peak AC line voltage without conduction in blocking state |
| IT(RMS) | 0.2 A at Tamb = 100 °C - Continuous load current rating for full-cycle AC switching |
| VCL | 600 V (typ.) - Clamps inductive turn-off transients to protect internal structure and downstream circuitry |
| IGT | < 5 mA (max) at Tj = 25 °C - Low gate drive requirement enables direct MCU GPIO interface via series resistor |
| (dI/dt)c | 0.1 A/ms (min) at Tj = 110 °C - Critical rate-of-rise limit defining safe commutation margin for inductive loads |
| VPP | 2 kV - Withstands non-repetitive line surge pulses per IEC61000-4-5 test conditions (R=150 Ω, L=5 µH) |
| Rth(j-a) | 150 °C/W - Junction-to-ambient thermal resistance with standard SO-8 PCB layout (no extended copper) |
Pinout & Package
ACS102-5T1 uses SO-8 surface-mount package with dual COM pins (pins 2 and 3) serving as common drive reference and primary thermal path. Pin 1 is NC, pin 4 is COM, pin 5 is G (gate), pin 6 is NC, pin 7 is NC, pin 8 is OUT. Creepage ≥3.5 mm from OUT (pin 8) to all other pins satisfies reinforced insulation requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, 6, 7 | NC | No internal connection; must be left unconnected or grounded per layout guidelines |
| Pins 2, 3, 4 | COM | Common drive reference and thermal sink; connects to neutral line and PCB copper pour for heat dissipation |
| Pin 5 | G | Gate input; triggered by negative current flowing *out* - driven directly by MCU GPIO through series resistor |
| Pin 8 | OUT | Switch output; connects to load (e.g., valve, relay, lamp); voltage clamped to ≤600 V during turn-off |
Key Features
| Feature | Design Value |
|---|---|
| Integrated clamping diode | Handles up to ~20 mJ turn-off energy from inductive loads (e.g., 10 H solenoid at 20 mA holding current), eliminating external snubbers |
| Negative gate trigger | Enables direct MCU interface without level-shifting ICs; gate current sourced from load side, isolating controller from AC domain |
| Dual COM thermal pins | Supports multi-device mounting on shared 40 mm² copper pad, reducing thermal resistance to 60 °C/W and simplifying heatsink design |
| IEC61000-4-5 compliance | Withstands 2 kV surge pulses (1.2/50 µs + 8/20 µs) without external TVS, meeting appliance transient immunity standards |
| No external overvoltage protection | Clamping and breakover behavior eliminate need for MOVs or TVS diodes across main terminals, cutting BOM count and board space |
Applications
| Washing Machine Door Lock Control | Dishwasher Solenoid Valve Switching |
|---|---|
|
Use Scenario: Cycling power to electromechanical door lock during wash/drain phases in 230 V AC appliances. IC Role / Device Role / Timing Role: AC line switch providing zero-crossing–free, full-cycle ON/OFF control with built-in surge immunity. Use Value: Eliminates need for optocoupler + TRIAC + snubber stack; withstands repeated 2 kV surges per IEC61000-4-5 without degradation. |
Use Scenario: Driving 230 V AC solenoid valves for water inlet/outlet in dishwashers with high inductance (≥5 H). IC Role / Device Role / Timing Role: Integrated clamping switch absorbing turn-off energy up to 20 mJ without external components. Use Value: Enables direct MCU GPIO drive with <5 mA gate current; sustains 0.2 A RMS load current at 100 °C ambient. |
| Refrigerator Fan Motor Control | Electric Cookware Lamp Dimming Interface |
|
Use Scenario: Controlling small AC fans (0.15–0.25 A) in refrigeration units where EMI and thermal management are critical. IC Role / Device Role / Timing Role: Solid-state replacement for mechanical relays, delivering silent, bounce-free switching with 3.5 mm creepage safety. Use Value: Dual COM pins allow shared thermal pad with other ACS devices; Rth(j-l) = 60 °C/W enables operation at 125 °C junction temperature. |
Use Scenario: Switching low-power incandescent lamps (≤40 W) in cooktop control panels requiring Class II insulation. IC Role / Device Role / Timing Role: AC switch with integrated clamping and gate driver, replacing discrete TRIAC + driver + protection network. Use Value: Meets IEC335-1 reinforced insulation requirements via 3.5 mm creepage; reduces component count by 80% versus legacy solutions. |
Availability
ACS102-5T1 is available at Aetrix Electronics and suitable for washing machine control modules, dishwasher valve drivers, refrigerator fan interfaces, and electric cookware lamp switching requiring stable component supply and long-term industrial availability.
Supply support for ACS102-5T1 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The ACS™ AC switch product line targets appliance and industrial control applications requiring robust, integrated, low-component-count alternatives to relay + TRIAC + protection combinations for 0.1–0.3 A AC loads.
FAQ
What is the maximum continuous load current the ACS102-5T1 can switch in a 230 V AC system?
The ACS102-5T1 supports 0.2 A RMS continuous current at 100 °C ambient temperature in SO-8 package, verified per IEC61000-4-5 surge testing and thermal characterization with 40 mm² copper under COM pins. Derating applies above 100 °C ambient per Figure 6 in the datasheet.
Can the ACS102-5T1 replace a mechanical relay in solenoid valve applications?
Yes - it replaces relays in low-power AC solenoid valves (e.g., dishwasher inlet valves) by providing silent, wear-free switching with integrated clamping for inductive kickback. It handles up to 20 mJ turn-off energy and sustains 0.2 A RMS without auxiliary snubbers or flyback diodes.
How is the gate driven, and what MCU interface configuration is required?
Pin G requires a negative gate current flowing *out* of the pin, so the MCU GPIO must sink current through a series resistor (e.g., 140 Ω for 12 V drive). No level shifter or optocoupler is needed; the gate is referenced to COM, not ground, ensuring isolation from AC line potential.
Does the ACS102-5T1 require external overvoltage protection when used on 230 V AC mains?
No - its integrated clamping diode limits VOUT to ≤600 V during transients, and it withstands 2 kV non-repetitive surges per IEC61000-4-5 without external MOVs or TVS diodes. This is confirmed by test circuit Figure 3 and waveform validation in Figures 1 and 4.
ACS102-5T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ASD™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Triac Type:
- Logic - Sensitive Gate
- Voltage - Off State:
- 500 V
- Current - On State (It (RMS)) (Max):
- 200 mA
- Voltage - Gate Trigger (Vgt) (Max):
- 900 mV
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 7.3A, 8A
- Current - Gate Trigger (Igt) (Max):
- 5 mA
- Current - Hold (Ih) (Max):
- 20 mA
- Configuration:
- Single
- Operating Temperature:
- -30°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ACS102-5T1 FAQ
1.How can I place an order for ACS102-5T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ACS102-5T1 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 ACS102-5T1 reliable?
The price and inventory of ACS102-5T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACS102-5T1 is usually 5 days.
3.What payment methods are accepted for ACS102-5T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACS102-5T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACS102-5T1?
ACS102-5T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACS102-5T1 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 ACS102-5T1?
For technical support, including ACS102-5T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACS102-5T1 requirements.
6.How does Aetrix verify that ACS102-5T1 is sourced from the original manufacturer or authorized distributors?
All ACS102-5T1 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 ACS102-5T1 meets industry standards.
7.What is the process for return or replacement of ACS102-5T1?
All ACS102-5T1 units undergo pre-shipment inspection (PSI). If there is an issue with ACS102-5T1, 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 ACS102-5T1 part is unused and in its original packaging.
Return procedure for ACS102-5T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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