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STMicroelectronics ACS108-6SA-AP
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- Part No.:
- ACS108-6SA-AP
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
ACS108-6SA-AP.pdf
- Description:
- TRIAC SENS GATE 600V 0.45A TO92
- Quantity:
- Payment:
- Shipping:
Inventory:9,648
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Product details
Overview
ACS108-6SA-AP from STMicroelectronics is a 0.8 A, 600 V RMS AC switch with integrated overvoltage crowbar protection (VCL ≥ 650 V), designed for direct microcontroller-driven AC load control in appliances and industrial systems. It features gate-level shifting, negative gate triggering (IGT ≤ 10 mA), and eliminates external snubbers or varistors in inductive switching applications such as solenoids and valves.
For engineers reviewing the ACS108-6SA-AP datasheet, ACS108-6SA-AP pinout, ACS108-6SA-AP application, or ACS108-6SA-AP equivalent, this device offers verified IEC 61000-4-5 surge ruggedness (2 kV pulse), dV/dt immunity ≥ 2000 V/μs at 125 °C, and thermal performance validated for TO-92 mounting on FR4 PCBs with natural convection.
Technical Context
The ACS108-6SA-AP integrates an A.S.D.® (Advanced Static Discharge) structure enabling self-protecting turn-off clamping of inductive energy without external components. Its gate driver isolates digital controllers via level-shifting and accepts direct negative current drive (IGT ≤ 10 mA, VGT ≤ 1.0 V).
It operates in Quadrants II and III, supports full-sine AC switching up to 0.8 A RMS, and delivers robust noise immunity: static dV/dt ≥ 2000 V/μs and burst immunity per IEC 61000-4-4. Clamping voltage VCL ≥ 650 V provides headroom before crowbar action during high-dI/dt turn-off events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 0.8 A - Maximum continuous AC load current at Tlead = 76 °C, suitable for low-power motors, solenoids, and lamps. |
| VDRM / VRRM | 600 V - Peak repetitive blocking voltage, compatible with 230 V AC mains with safety margin. |
| IGT / VGT | ≤ 10 mA / ≤ 1.0 V - Gate trigger current/voltage enabling direct MCU GPIO drive via 220 Ω resistor. |
| VCL | ≥ 650 V - Clamping voltage threshold initiating crowbar action to safely dissipate inductive turn-off energy. |
| dV/dt immunity | ≥ 2000 V/μs at 125 °C - Immunity to false triggering from fast transients in noisy industrial environments. |
| Rth(j-l) | 60 °C/W - Junction-to-lead thermal resistance confirming effective heat transfer through TO-92 tab to shared heatsink pad. |
Pinout & Package
Package: TO-92 with lead-free plating and halogen-free epoxy (UL94 V0). Tab is electrically connected to COM terminal, enabling parallel mounting of multiple ACS switches on a common cooling pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COM | Common reference terminal | Connected to AC mains neutral or return path; tab-connected for thermal and electrical commonality across devices. |
| OUT | AC load output terminal | Switched AC output to load (e.g., solenoid, lamp); referenced to COM for bidirectional conduction. |
| G | Gate control input | Receives negative gate current (≤10 mA) from MCU; triggers conduction in Quadrants II/III without external level shifter. |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage crowbar protection | VCL ≥ 650 V enables safe clamping and energy dissipation during inductive turn-off without snubber circuits. |
| IEC 61000-4-5 surge ruggedness | Withstands ±2 kV line-to-line surges per IEC 61000-4-5 test circuit, eliminating need for external MOVs. |
| Direct microcontroller interface | Accepts negative gate current drive from standard GPIO pins using only a series resistor (e.g., 220 Ω). |
| High dV/dt immunity | ≥2000 V/μs at 125 °C prevents false triggering in electrically noisy appliance and industrial control environments. |
| Shared thermal pad compatibility | TO-92 tab tied to COM allows multiple ACS switches to be mounted on one heatsink, reducing board space and thermal management cost. |
Applications
| Appliance Solenoid Control | Industrial Valve Actuation |
|---|---|
Use Scenario: Controlling water/gas solenoid valves in washing machines, dishwashers, and HVAC systems. IC Role / Device Role / Timing Role: AC mains switch providing zero-crossing–independent turn-on and controlled turn-off with clamping. Use Value: Eliminates snubber networks and reduces BOM count by up to 80% while meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Driving pneumatic or hydraulic control valves in PLC-based factory automation systems. IC Role / Device Role / Timing Role: High-noise-immunity AC switch handling inductive loads up to 15 H with no external protection. Use Value: Enables reliable operation under 125 °C ambient conditions and withstands repetitive 2 kV transients on 230 V AC mains. |
| Low-Power Motor Control | Lamp Dimming Interface |
Use Scenario: On/off control of small AC fans, air dampers, or door locks in smart building systems. IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical relays with faster switching and longer lifetime. Use Value: Reduces component count and PCB area versus relay + snubber solutions while maintaining 0.8 A RMS load capability. |
Use Scenario: Resistive load switching for incandescent/halogen lamps in lighting control modules. IC Role / Device Role / Timing Role: AC switch with low on-state voltage (VTM ≤ 1.3 V) minimizing power loss and self-heating. Use Value: Delivers <0.5 W conduction loss at 0.8 A, supporting compact TO-92 packaging without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS108-6S | No AP suffix; supplied in bulk (2500 pcs), not ammopack. Identical electrical specs and TO-92 package. | Same functional use but lacks pre-packaged ammopack convenience for prototyping or low-volume production. | Select ACS108-6S for cost-sensitive high-volume manufacturing where bulk handling is preferred. |
| ACS108-6SA-TR | Identical device in tape-and-reel (2000 pcs, 13″ reel); same VCL, IGT, and thermal specs as ACS108-6SA-AP. | Optimized for automated SMT placement; AP variant is manual/semi-auto assembly friendly with ammo packaging. | Choose ACS108-6SA-TR for pick-and-place integration; ACS108-6SA-AP for hand-soldering, lab evaluation, or small-batch builds. |
Compared with ACS108-6S and ACS108-6SA-TR, the ACS108-6SA-AP offers identical electrical and thermal performance in a convenient ammopack format-ideal for design validation and pilot production where traceability and ease of manual handling are prioritized over automated assembly throughput.
Availability
ACS108-6SA-AP is available at Aetrix Electronics and suitable for appliance solenoid control, industrial valve actuation, and low-power motor switching requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ACS108-6SA-AP 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 silicon solutions for automotive, industrial, and consumer markets.
The ACS™ AC switch product line targets solid-state replacement of electromechanical relays in AC mains-powered equipment, emphasizing integrated surge protection, reduced BOM count, and direct microcontroller interfacing.
FAQ
What is the recommended gate resistor value for driving ACS108-6SA-AP from a 3.3 V MCU GPIO?
A 220 Ω resistor is specified in the datasheet for direct drive from 3.3 V logic: it delivers ~10 mA negative gate current (3.3 V / 220 Ω ≈ 15 mA, limited by internal gate impedance), staying within the IGT ≤ 10 mA max rating while ensuring robust turn-on across temperature and process variation.
Can ACS108-6SA-AP replace a mechanical relay in a 230 V AC, 0.6 A solenoid application?
Yes - it supports 0.8 A RMS continuous current and handles inductive turn-off energy via VCL ≥ 650 V clamping. Unlike relays, it provides silent operation, no contact wear, and eliminates arcing risks. No snubber is required, and its dV/dt immunity (≥2000 V/μs) prevents false triggering in noisy environments.
Does ACS108-6SA-AP require heatsinking in a sealed enclosure at 65 °C ambient?
At 0.8 A RMS and 65 °C ambient, junction temperature remains within limits (Tj ≤ 125 °C) when mounted on FR4 with natural convection and the TO-92 tab soldered to a 5 cm² copper area, per datasheet Figure 2. Heatsinking is not required unless operating continuously near IT(RMS) limit in >75 °C ambient or with poor airflow.
How does the ACS108-6SA-AP's overvoltage crowbar differ from a standard Triac's behavior during surge events?
Standard Triacs lack integrated clamping and rely on external MOVs to absorb surge energy. ACS108-6SA-AP uses A.S.D.® technology to enter controlled avalanche breakdown at VCL ≥ 650 V, then crowbar into low-impedance conduction - safely diverting up to 2 kV surges (per IEC 61000-4-5) without degradation, and recovering blocking capability at next zero-crossing.
ACS108-6SA-AP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ACS™/A.S.D®
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Triac Type:
- Logic - Sensitive Gate
- Voltage - Off State:
- 600 V
- Current - On State (It (RMS)) (Max):
- 450 mA
- Voltage - Gate Trigger (Vgt) (Max):
- 1 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 7.3A, 7.6A
- Current - Gate Trigger (Igt) (Max):
- 10 mA
- Current - Hold (Ih) (Max):
- 25 mA
- Configuration:
- Single
- Operating Temperature:
- -30°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92
ACS108-6SA-AP FAQ
1.How can I place an order for ACS108-6SA-AP through Aetrix?
Please submit a Request for Quotation (RFQ) for ACS108-6SA-AP 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 ACS108-6SA-AP reliable?
The price and inventory of ACS108-6SA-AP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACS108-6SA-AP is usually 5 days.
3.What payment methods are accepted for ACS108-6SA-AP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACS108-6SA-AP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACS108-6SA-AP?
ACS108-6SA-AP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACS108-6SA-AP 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 ACS108-6SA-AP?
For technical support, including ACS108-6SA-AP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACS108-6SA-AP requirements.
6.How does Aetrix verify that ACS108-6SA-AP is sourced from the original manufacturer or authorized distributors?
All ACS108-6SA-AP 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 ACS108-6SA-AP meets industry standards.
7.What is the process for return or replacement of ACS108-6SA-AP?
All ACS108-6SA-AP units undergo pre-shipment inspection (PSI). If there is an issue with ACS108-6SA-AP, 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 ACS108-6SA-AP part is unused and in its original packaging.
Return procedure for ACS108-6SA-AP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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