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STMicroelectronics ACS302-5T3-TR
- Part No.:
- ACS302-5T3-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ACS302-5T3-TR.pdf
- Description:
- TRIAC SENS GATE 500V 0.2A 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:8,241
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Product details
Overview
ACS302-5T3 from STMicroelectronics is a three-channel high-voltage AC switch array in SO-20 package, designed for static on/off control of low-power inductive/resistive loads. It features 500 V blocking voltage (VDRM/VRRM), 600 V clamping voltage (VCL), 0.2 A RMS per channel, and negative-gate triggering with IGT < 5 mA. Used in appliance motor, valve, and solenoid switching.
For engineers reviewing the ACS302-5T3 datasheet, ACS302-5T3 pinout, ACS302-5T3 application, or ACS302-5T3 equivalent, key selection criteria include bidirectional AC switching capability, integrated avalanche clamping for inductive turn-off energy absorption, gate-level shifter isolation, and direct microcontroller interface without external protection.
Technical Context
The ACS302-5T3 integrates three independent ASD™ AC switches, each with an embedded high-voltage clamping diode and gate-level shifter driver. It operates in full-cycle AC conduction mode and turns off naturally when load current falls below holding current (IH ≈ 20–45 mA).
Triggering requires a negative gate current flowing out of G1–G3 pins, enabling direct connection to MCU GPIOs via series resistors. The device meets IEC61000-4-5 surge immunity (2 kV line-to-line) and IEC335-1 safety standards due to SO-20 thermal and creepage performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 500 V - maximum repetitive peak off-state voltage per switch, supports 230 VAC mains with margin |
| VCL | 600 V - clamping voltage during inductive turn-off, limits voltage stress on connected loads and PCB traces |
| IT(RMS) per channel | 0.2 A - continuous RMS current handling per switch at Tamb = 110 °C, suitable for solenoids and micro-motors |
| IT(RMS) total array | 0.4 A - aggregate RMS current rating when all three switches operate simultaneously at Tamb = 90 °C |
| IGT | < 5 mA - maximum gate trigger current required, enables direct drive from standard MCU I/O pins |
| dI/dt | 20 A/µs - critical rate of rise of on-state current, ensures reliable turn-on under fast-rising inductive transients |
| Rth(j-a) | 93 °C/W - junction-to-ambient thermal resistance, defines power derating vs. ambient temperature in SO-20 package |
Pinout & Package
ACS302-5T3 is housed in a standard SO-20 surface-mount package (12.6 × 7.6 mm, 1.27 mm pitch) with exposed thermal pad not electrically connected. Pin 1 is OUT1; Pin 11 is COM; Pins 2, 3, 4, 6, 7, 8, 10, 12, 14, 15, 17, 19 are NC. Functional terminals are grouped as output, gate, and common reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1, OUT2, OUT3 (Pins 1, 20, 18) | Switch output terminal | Connects to load (e.g., valve coil); each carries up to 0.2 A RMS; referenced to COM |
| COM (Pin 11) | Common return reference | Connects to neutral side of AC mains; serves as shared current return path for all three switches |
| G1, G2, G3 (Pins 19, 17, 15) | Negative gate input | Receives sinking current from MCU GPIO; triggers corresponding switch when IGT > 5 mA flows out |
| S1, S2, S3 (Pins 12, 14, 16) | Source terminal (internal) | Internally tied to COM; not externally accessible; provides internal current return path for gate driver |
Key Features
| Feature | Design Value |
|---|---|
| Integrated avalanche clamping | Clamps turn-off inductive energy up to ~20 mJ per switch, eliminating need for external snubbers |
| Gate-level shifter isolation | Electrically separates MCU logic domain from AC power domain, preventing gate kickback stress on controller |
| Direct microcontroller interface | Accepts standard 3.3 V/5 V GPIO outputs via simple series resistor-no level-shifting IC or optocoupler required |
| IEC61000-4-5 compliance ready | Withstands 2 kV line-to-line surge pulses (1.2/50 µs + 8/20 µs) without external protection components |
| Array architecture | Three independent switches in one SO-20 package reduce board area by >40% vs. discrete triac solutions |
Applications
| Dishwasher Control Module | Washing Machine Valve Driver |
|---|---|
Use Scenario: Controls water inlet valves, drain pump, and door lock in a single-cycle appliance control board. IC Role / Device Role / Timing Role: AC line switch array providing zero-crossing–free, full-cycle ON/OFF control of three 0.2 A inductive loads. Use Value: Eliminates need for three discrete triacs + snubbers, reducing BOM count and improving reliability under repeated surge events. | Use Scenario: Switches detergent dispenser solenoid, hot/cold water valves, and spin motor brake coil. IC Role / Device Role / Timing Role: Bidirectional AC switch managing resistive and inductive loads with integrated clamping for safe turn-off. Use Value: Withstands 2 kV surges per IEC61000-4-5 without external protection, meeting global safety certification requirements. |
| Refrigerator Ice Dispenser | Electric Cookware Fan Controller |
Use Scenario: Drives ice chute solenoid, auger motor, and water valve in compact kitchen appliance design. IC Role / Device Role / Timing Role: High-voltage AC switch enabling precise timing of short-duration (≤500 ms) inductive actuation pulses. Use Value: Clamping voltage limited to 600 V prevents overvoltage failure during rapid solenoid de-energization. | Use Scenario: Controls cooling fan and heating element relays in induction cooktop control unit. IC Role / Device Role / Timing Role: Three-channel AC switch delivering isolated, noise-immune switching for mixed resistive/inductive loads. Use Value: Gate-level shifter prevents MCU reset or latch-up caused by inductive back-EMF coupling into digital logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC line switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS304-5T3 | Same SO-20 package; higher IT(RMS) = 0.4 A per channel; VCL = 650 V; IGT < 10 mA | Supports heavier loads (e.g., larger solenoids or dual-coil valves); requires higher gate drive current | Select when per-channel current exceeds 0.2 A but board space remains constrained |
| ACS108-6T3 | Single-channel version in SO-8; VDRM = 600 V; IT(RMS) = 0.1 A; no integrated clamping diode | Requires external RC snubber for inductive loads; lower integration density; simpler thermal layout | Choose for cost-sensitive, low-channel-count designs where layout allows discrete snubbers |
Compared with ACS304-5T3 and ACS108-6T3, the ACS302-5T3 offers optimal balance of per-channel current (0.2 A), integrated clamping, and triple-channel density in SO-20-making it ideal for mid-power appliance control where space and surge robustness are critical.
Availability
ACS302-5T3 is available at Aetrix Electronics and suitable for dishwasher control modules, washing machine valve drivers, and refrigerator ice dispensers requiring stable component supply across multi-year production cycles.
Supply support for ACS302-5T3 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 automotive, industrial, and appliance-grade power and analog ICs.
The ACS™ AC switch product line was developed specifically for solid-state replacement of electromechanical relays in white goods, offering integrated protection, simplified drive, and certified surge resilience.
FAQ
What is the recommended gate resistor value for driving ACS302-5T3 from a 5 V MCU GPIO?
A 140 Ω series resistor is specified in the datasheet for VOUT = 12 V operation, but for 5 V MCU drive, a 100–120 Ω resistor ensures IGT ≥ 5 mA while limiting PG(AV) to ≤ 0.1 W. This value balances reliable triggering against gate power dissipation and rise time.
Can ACS302-5T3 drive a 230 VAC, 0.18 A fan motor directly without heatsinking?
Yes - at Tamb ≤ 90 °C with one switch active, the device sustains 0.2 A RMS with Rth(j-a) = 93 °C/W, resulting in ~1.7 W power dissipation and ~160 °C junction temperature margin below 125 °C max. No external heatsink is needed for typical appliance ambient conditions.
Does ACS302-5T3 require zero-crossing detection for safe operation?
No - the device operates in full-cycle conduction mode and does not require zero-crossing synchronization. Its clamping structure safely absorbs turn-off energy regardless of phase angle, enabling precise timing control of inductive loads without added circuitry.
How does the COM pin function in a 230 VAC system with live/neutral wiring?
COM must be connected to the neutral line (not earth ground) to serve as the common return path for all three switches. This configuration ensures correct voltage referencing for gate triggering and maintains IEC335-1 creepage/clearance compliance in the SO-20 footprint.
ACS302-5T3-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ASD™
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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, 7.6A
- Current - Gate Trigger (Igt) (Max):
- 5 mA
- Current - Hold (Ih) (Max):
- 45 mA
- Configuration:
- Array
- Operating Temperature:
- -30°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
ACS302-5T3-TR FAQ
1.How can I place an order for ACS302-5T3-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ACS302-5T3-TR 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 ACS302-5T3-TR reliable?
The price and inventory of ACS302-5T3-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACS302-5T3-TR is usually 5 days.
3.What payment methods are accepted for ACS302-5T3-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACS302-5T3-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACS302-5T3-TR?
ACS302-5T3-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACS302-5T3-TR 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 ACS302-5T3-TR?
For technical support, including ACS302-5T3-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACS302-5T3-TR requirements.
6.How does Aetrix verify that ACS302-5T3-TR is sourced from the original manufacturer or authorized distributors?
All ACS302-5T3-TR 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 ACS302-5T3-TR meets industry standards.
7.What is the process for return or replacement of ACS302-5T3-TR?
All ACS302-5T3-TR units undergo pre-shipment inspection (PSI). If there is an issue with ACS302-5T3-TR, 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 ACS302-5T3-TR part is unused and in its original packaging.
Return procedure for ACS302-5T3-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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