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STMicroelectronics Z0409NF 1AA2
- Part No.:
- Z0409NF 1AA2
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-202 No Tab
- Datasheet:
-
Z0409NF 1AA2.pdf
- Description:
- TRIAC SENS GATE 800V 4A TO202-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,895
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Product details
Overview
Z0409NF 1AA2 from STMicroelectronics is a 4 A, 800 V RMS triac in TO-202-3 package, designed for AC mains switching in home appliances and fan speed control. It features 10 mA gate trigger current (IGT), 2.0 V on-state voltage (VTM), and 20 A non-repetitive surge rating. Used in electrovalve and small lamp control circuits with direct microcontroller gate drive.
For engineers reviewing the Z0409NF 1AA2 datasheet, Z0409NF 1AA2 pinout, Z0409NF 1AA2 application, or Z0409NF 1AA2 equivalent, key selection criteria include dV/dt immunity (100 V/µs), critical dI/dt (20 A/µs), junction-to-lead thermal resistance (15 °C/W), and ECOPACK® lead-free compliance for industrial-grade AC switching designs.
Technical Context
This triac operates in all four quadrants (I–IV) with symmetrical bidirectional conduction, enabling phase-angle and zero-crossing AC control without polarity constraints. Its gate sensitivity (10 mA IGT max) allows direct drive from 3.3 V/5 V MCU GPIO pins via simple series resistors.
Thermal design relies on Rth(j–l) = 15 °C/W to sustain 4 A RMS at Tamb ≤ 75 °C with adequate heatsinking. The device maintains latching current (IL) ≤ 15 mA and holding current (IH) ≤ 10 mA across –40 °C to +125 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A - Sustains continuous AC load current in motor/fan/lamp drivers without forced cooling |
| VDRM / VRRM | 800 V - Blocks peak line voltages up to 566 V RMS (e.g., 230 VAC + margin) safely |
| IGT (Q1) | 10 mA max - Compatible with standard MCU output drive capability (no external buffer needed) |
| dV/dt (c) | 2 V/µs min - Resists false triggering from fast transients in noisy appliance environments |
| VTM | 2.0 V max at 5.5 A - Limits conduction loss to ≤11 W at full RMS current, easing thermal management |
| Rth(j–l) | 15 °C/W - Enables PCB copper pour heatsinking to maintain Tj < 125 °C at 4 A RMS |
| I²t | 2.2 A²s - Supports fuse coordination for short-circuit protection in UL/IEC-compliant designs |
Pinout & Package
TO-202-3 package with isolated tab (A2 connected to case). Standard through-hole mounting; tab electrically connected to MT2 (A2) terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2 (Tab) | Main Terminal 2 | High-side AC line connection; thermally coupled to heatsink; must be insulated if chassis-ground referenced |
| A1 | Main Terminal 1 | Load return path; referenced to neutral or low-side AC; common reference for gate drive |
| G | Gate | Trigger input; requires ≥10 mA pulse to initiate conduction in any quadrant; sensitive to noise |
Key Features
| Feature | Design Value |
|---|---|
| Four-quadrant operation | Enables universal phase-control timing without polarity-dependent gate circuitry |
| ECOPACK® lead-free packaging | Meets RoHS and JEDEC JESD97 marking requirements for industrial environmental compliance |
| 100 V/µs dV/dt immunity | Prevents spurious turn-on during voltage transients in washing machine or HVAC motor circuits |
| 15 °C/W junction-to-lead Rth | Allows use of minimal copper area (≥250 mm²) for thermal relief in cost-sensitive PCB layouts |
| 10 mA gate trigger threshold | Permits direct drive from STM32 or PIC GPIO with 330 Ω series resistor at 5 V |
Applications
| Home Appliance Electrovalve Control | Fan Speed Regulation |
|---|---|
Use Scenario: On/off sequencing of water inlet valves in dishwashers and washing machines using 230 VAC supply. IC Role / Device Role / Timing Role: Bidirectional AC switch triggered by MCU PWM signal synchronized to zero-crossing detection. Use Value: Eliminates need for relay + snubber; reduces EMI and acoustic noise while supporting >100,000 cycle lifetime. | Use Scenario: Variable-speed control of shaded-pole or PSC fans in air purifiers and HVAC units. IC Role / Device Role / Timing Role: Phase-angle controlled triac delivering adjustable RMS voltage to fan motor windings. Use Value: Achieves 30–100% airflow range with <±2% speed stability and no external current sensing required. |
| Small Lamp Dimming | Door Lock Actuation |
Use Scenario: Dimmable lighting control for LED-compatible incandescent or halogen lamps in smart home panels. IC Role / Device Role / Timing Role: Zero-crossing switched triac modulating power delivery per dimming command from Zigbee/Z-Wave MCU. Use Value: Provides flicker-free dimming down to 5% brightness with <100 mW standby power consumption. | Use Scenario: Solenoid-driven door lock activation in access control systems powered from 230 VAC mains. IC Role / Device Role / Timing Role: High-reliability AC switch delivering 500 ms pulse to energize lock coil with precise timing. Use Value: Ensures consistent mechanical engagement under varying line voltage (±10%) and ambient temperature (–20 to +70 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT139-800E | 8 A IT(RMS), 800 V, 50 mA IGT, TO-220 package | Higher current handling but requires gate buffer; larger footprint | Select when >4 A load current or higher surge margin is required |
| Z0109MN | 1 A IT(RMS), 800 V, 10 mA IGT, TO-92 package | Lower power rating; limited to signal-level AC switching | Select for space-constrained sub-1 A control circuits where TO-202-3 is oversized |
Compared with BT139-800E and Z0109MN, Z0409NF 1AA2 uniquely balances 4 A capacity, 10 mA gate sensitivity, and TO-202-3 mountability-making it optimal for mid-power appliance modules where board space, thermal performance, and MCU drive simplicity are jointly constrained.
Availability
Z0409NF 1AA2 is available at Aetrix Electronics and suitable for home appliance electrovalve control, fan speed regulation, and small lamp dimming requiring stable component supply across extended production lifecycles.
Supply support for Z0409NF 1AA2 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
Z0409NF 1AA2 belongs to the Z04 Standard Triacs product line, engineered specifically for cost-effective, reliable AC mains switching in white goods and building automation equipment.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The Z0409NF 1AA2 has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at 4 A RMS requires maintaining Tj ≤ 125 °C via thermal design-achievable with Rth(j–l) = 15 °C/W and sufficient PCB copper area or heatsink interface.
Can this triac be driven directly from a 3.3 V microcontroller GPIO?
Yes-its 10 mA maximum gate trigger current (IGT) allows direct drive from most 3.3 V MCUs using a 220 Ω series resistor. Gate voltage must reach ≥1.3 V (VGT max), which is satisfied with typical GPIO high-level output of 3.1–3.3 V.
Is a snubber circuit required for inductive loads like motors?
A snubber (RC network across A1–A2) is recommended for inductive loads to suppress dV/dt-induced false triggering. With Z0409NF's 100 V/µs dV/dt rating, a 100 Ω + 100 nF snubber typically suffices for 4 A fan motors operating at 50/60 Hz.
Does this part meet RoHS and REACH compliance requirements?
Yes-Z0409NF 1AA2 is supplied in ST's ECOPACK® package with lead-free second-level interconnect, fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed by ST's official declaration and inner box labeling.
Z0409NF 1AA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-202 No Tab
- Packaging:
- Bag
- Product Status:
- Obsolete
- Triac Type:
- Logic - Sensitive Gate
- Voltage - Off State:
- 800 V
- Current - On State (It (RMS)) (Max):
- 4 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 20A, 21A
- Current - Gate Trigger (Igt) (Max):
- 10 mA
- Current - Hold (Ih) (Max):
- 10 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-202-3
Z0409NF 1AA2 FAQ
1.How can I place an order for Z0409NF 1AA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for Z0409NF 1AA2 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 Z0409NF 1AA2 reliable?
The price and inventory of Z0409NF 1AA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0409NF 1AA2 is usually 5 days.
3.What payment methods are accepted for Z0409NF 1AA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0409NF 1AA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for Z0409NF 1AA2?
Z0409NF 1AA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your Z0409NF 1AA2 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 Z0409NF 1AA2?
For technical support, including Z0409NF 1AA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0409NF 1AA2 requirements.
6.How does Aetrix verify that Z0409NF 1AA2 is sourced from the original manufacturer or authorized distributors?
All Z0409NF 1AA2 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 Z0409NF 1AA2 meets industry standards.
7.What is the process for return or replacement of Z0409NF 1AA2?
All Z0409NF 1AA2 units undergo pre-shipment inspection (PSI). If there is an issue with Z0409NF 1AA2, 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 Z0409NF 1AA2 part is unused and in its original packaging.
Return procedure for Z0409NF 1AA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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