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STMicroelectronics Z0405NF 1AA2
- Part No.:
- Z0405NF 1AA2
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-202 No Tab
- Datasheet:
-
Z0405NF 1AA2.pdf
- Description:
- TRIAC SENS GATE 800V 4A TO202-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,166
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Product details
Overview
Z0405NF from STMicroelectronics is a 4 A, 800 V RMS sensitive-gate triac in TO-202-3 package, with 5 mA gate trigger current (IGT), 2.0 V on-state voltage (VTM), and 20 A non-repetitive surge rating-designed for AC load switching in home appliance electrovalves, pump controls, and fan speed regulators.
For engineers reviewing the Z0405NF datasheet, Z0405NF pinout, Z0405NF application, or Z0405NF equivalent, key selection criteria include gate sensitivity (5 mA), dV/dt immunity (100 V/µs), thermal resistance (15 °C/W junction-to-lead), and compatibility with direct microcontroller drive in low-power AC control circuits.
Technical Context
This triac operates in all four quadrants (I–IV) with guaranteed triggering at 5 mA IGT under standard test conditions (VD = 12 V, RL = 30 Ω). It features a 100 V/µs critical rate of rise of off-state voltage (dV/dt) at Tj = 110 °C and supports full-cycle sinusoidal conduction up to 4 A RMS at 25 °C ambient.
Its latching current (IL) is 10 mA and holding current (IH) is 5 mA at 25 °C, enabling reliable turn-on and sustained conduction in resistive and moderately inductive loads. The device uses planar passivated silicon technology and meets ECOPACK® environmental compliance with lead-free interconnects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A - Sustained AC load current capability at 25 °C ambient with proper heatsinking |
| VDRM / VRRM | 800 V - Peak repetitive off-state blocking voltage in both directions |
| IGT (Q1) | 5 mA - Gate trigger current enabling direct drive from 3.3 V/5 V microcontrollers |
| dV/dt (min) | 100 V/µs - Immunity to false triggering from fast-rising line transients |
| VTM | 2.0 V - On-state voltage drop at 5.5 A, defining conduction loss and thermal design margin |
| Rth(j-l) | 15 °C/W - Junction-to-lead thermal resistance, critical for PCB copper pour sizing |
| I²t (fusing) | 2.2 A²s - Single-pulse energy withstand before failure, used for fuse coordination |
Pinout & Package
TO-202-3 package: insulated plastic case with three leads (A1, A2, G), lead-free ECOPACK® compliant, 0.8 g unit weight, tube packaging (50 pcs/tube).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main terminal 1 (MT1) | Reference electrode for gate triggering; connected to neutral or low-side AC line |
| A2 | Main terminal 2 (MT2) | High-side AC load connection; polarity determines quadrant operation |
| G | Gate | Control input requiring ≥5 mA pulse to initiate conduction in any quadrant |
Key Features
| Feature | Design Value |
|---|---|
| Quadrant IV operation | Enables triggering with negative gate-to-A1 voltage, supporting phase-control dimming with standard optotriac drivers |
| ECOPACK® compliance | Lead-free second-level interconnect and JEDEC JESD97 marking for RoHS-conforming industrial manufacturing |
| Low IGT (5 mA) | Reduces gate driver power requirement and enables use of low-current GPIO pins without buffer transistors |
| 100 V/µs dV/dt rating | Prevents spurious turn-on during zero-crossing switching in noisy 50/60 Hz mains environments |
Applications
| Home Appliance Electrovalve Control | Fan Speed Regulation |
|---|---|
Use Scenario: Precise on/off timing of water/gas solenoid valves in washing machines and dishwashers using microcontroller-generated gate pulses. IC Role / Device Role / Timing Role: Bidirectional AC switch replacing mechanical relays; triggered at zero-crossing to minimize EMI and contact wear. Use Value: 5 mA IGT allows direct MCU GPIO drive; 800 V VDRM ensures safety margin against 230 VAC line surges. | Use Scenario: Phase-angle controlled AC power delivery to universal motor fans in HVAC systems and kitchen hoods. IC Role / Device Role / Timing Role: Main switching element in leading-edge phase-cut dimmer topology, synchronized to AC zero-crossing detection. Use Value: 100 V/µs dV/dt rating prevents false triggering during rapid voltage transitions in phase-cut waveforms. |
| Pump Motor Switching | Small Lamp Load Control |
Use Scenario: Cycling of small AC induction pumps in coffee makers and humidifiers via timed gate pulses. IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical switches; handles inrush current up to 20 A peak for motor startup. Use Value: 20 A ITSM rating accommodates motor inrush; 15 °C/W Rth(j-l) enables compact PCB thermal design. | Use Scenario: Dimmable lighting control for decorative or indicator lamps in consumer electronics enclosures. IC Role / Device Role / Timing Role: Low-power AC switch for resistive filament or LED+capacitor loads, driven by optocoupled logic. Use Value: 2.0 V VTM limits self-heating at 4 A; TO-202-3 footprint allows through-hole mounting on cost-sensitive boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT136-600D | 4 A IT(RMS), 600 V VDRM, 5 mA IGT, TO-220 package | Lower voltage rating; requires derating in 230 VAC systems with high line surges | Select when board space permits TO-220 and 600 V blocking suffices |
| MAC97A6 | 4 A IT(RMS), 600 V VDRM, 10 mA IGT, TO-92 package | Higher IGT demands gate buffer; smaller package limits thermal performance | Choose only for ultra-low-cost, low-power, non-surge-prone applications |
Compared with BT136-600D and MAC97A6, Z0405NF offers superior 800 V blocking margin and TO-202-3 thermal performance (15 °C/W vs. ~50 °C/W for TO-92), making it optimal for robust, space-constrained 230 VAC appliance designs requiring microcontroller-direct drive.
Availability
Z0405NF is available at Aetrix Electronics and suitable for home appliance electrovalve control, fan speed regulation, and pump motor switching requiring stable component supply across long-life production programs.
Supply support for Z0405NF 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
Z04 series triacs belong to ST's power discrete portfolio, engineered specifically for cost-effective, reliable AC switching in white goods and building automation where gate sensitivity, surge robustness, and thermal efficiency are critical.
FAQ
What is the maximum junction temperature for continuous operation?
The Z0405NF has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at the upper limit requires thermal design ensuring junction temperature does not exceed 125 °C under worst-case ambient and load conditions, verified using Rth(j-l) = 15 °C/W and measured power dissipation.
Can Z0405NF be triggered directly from a 3.3 V microcontroller GPIO?
Yes-its 5 mA maximum IGT at 25 °C and 1.3 V maximum VGT allow reliable triggering using a 3.3 V GPIO with a series resistor ≤ 560 Ω. At elevated temperatures, IGT may increase slightly; design margin should include worst-case IGT of 7 mA per Figure 4.
Is heatsinking required for 4 A RMS operation?
Heatsinking is required for sustained 4 A RMS operation above 25 °C ambient. With Rth(j-l) = 15 °C/W and VTM ≈ 2.0 V, power dissipation reaches ~8 W-exceeding the 0.2 W PG(AV) gate limit and demanding PCB copper area or external heatsink to maintain Tj ≤ 125 °C.
Does Z0405NF support snubberless operation?
Z0405NF is not rated as snubberless. Its (dV/dt)c minimum of 0.5 V/µs (at 1.8 A/ms dI/dt) indicates susceptibility to commutation dv/dt-induced turn-off failure; a snubber network (RC across MT1–MT2) is recommended for inductive loads like motors and transformers.
Z0405NF 1AA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-202 No Tab
- Packaging:
- Bulk
- 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):
- 5 mA
- Current - Hold (Ih) (Max):
- 5 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-202-3
Z0405NF 1AA2 FAQ
1.How can I place an order for Z0405NF 1AA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for Z0405NF 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 Z0405NF 1AA2 reliable?
The price and inventory of Z0405NF 1AA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0405NF 1AA2 is usually 5 days.
3.What payment methods are accepted for Z0405NF 1AA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0405NF 1AA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for Z0405NF 1AA2?
Z0405NF 1AA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your Z0405NF 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 Z0405NF 1AA2?
For technical support, including Z0405NF 1AA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0405NF 1AA2 requirements.
6.How does Aetrix verify that Z0405NF 1AA2 is sourced from the original manufacturer or authorized distributors?
All Z0405NF 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 Z0405NF 1AA2 meets industry standards.
7.What is the process for return or replacement of Z0405NF 1AA2?
All Z0405NF 1AA2 units undergo pre-shipment inspection (PSI). If there is an issue with Z0405NF 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 Z0405NF 1AA2 part is unused and in its original packaging.
Return procedure for Z0405NF 1AA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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