My Inquiry
My Account
STMicroelectronics Z0409DF 1AA2
- Part No.:
- Z0409DF 1AA2
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-202 No Tab
- Datasheet:
-
Z0409DF 1AA2.pdf
- Description:
- TRIAC SENS GATE 400V 4A TO202-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
Z0409DF 1AA2 from STMicroelectronics is a 4 A, 600 V RMS sensitive-gate triac in TO-202-3 package, rated for 10 mA gate trigger current (IGT) in Quadrants I/II/III/IV, with 20 A non-repetitive surge rating and 2.2 A²s I²t fusing value - used for microcontroller-driven AC load switching in home appliance electrovalves and fan speed controllers.
For engineers reviewing the Z0409DF 1AA2 datasheet, Z0409DF 1AA2 pinout, Z0409DF 1AA2 application, or Z0409DF 1AA2 equivalent, key selection criteria include gate sensitivity (10 mA), blocking voltage (600 V), thermal resistance (15 °C/W junction-to-lead), dV/dt immunity (100 V/µs), and compatibility with zero-crossing or phase-angle control topologies.
Technical Context
This triac operates in all four quadrants with symmetrical triggering behavior, enabling bidirectional AC conduction without external polarity management. Its 10 mA IGT allows direct drive from 3.3 V/5 V GPIO pins when paired with appropriate series resistance.
Thermal design is constrained by Rth(j-l) = 15 °C/W and Rth(j-a) = 100 °C/W, requiring heatsinking for sustained 4 A RMS loads above 25 °C ambient. The 20 A/20 ms surge rating supports motor startup and lamp inrush currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A - continuous AC load current handling at 25 °C ambient with adequate heatsinking |
| VDRM / VRRM | 600 V - peak repetitive off-state voltage blocking capability per datasheet Table 1 |
| IGT (Q1–Q4) | 10 mA max - gate current required to trigger conduction in any quadrant at 25 °C |
| dV/dt (min) | 100 V/µs - minimum rate of voltage rise the device withstands without false turn-on |
| I²t (fusing) | 2.2 A²s - energy threshold beyond which metallization fuse action occurs during surge |
| Rth(j-l) | 15 °C/W - thermal resistance from junction to lead, critical for PCB copper pour sizing |
| VTM | 2.0 V max - on-state voltage drop at 5.5 A pulse, defining conduction loss at rated current |
Pinout & Package
TO-202-3 package with isolated tab (A2), standard lead configuration: Pin 1 = MT1 (A1), Pin 2 = Gate (G), Pin 3 = MT2 (A2). Tab is electrically connected to MT2 (A2) and must be insulated if mounted to grounded heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 (A1) | Main Terminal 1 | AC line or load return path; referenced to gate for triggering in Q1/Q2 |
| Gate (G) | Control input | Triggers conduction when ≥10 mA applied relative to MT1 or MT2 depending on quadrant |
| MT2 (A2) | Main Terminal 2 | AC line or load hot path; electrically tied to metal tab; requires insulation if heatsinked |
Key Features
| Feature | Design Value |
|---|---|
| Quadrant IV operation | Enables triggering with negative gate-to-MT2 voltage, supporting universal AC phase control |
| Sensitive gate (10 mA) | Eliminates need for discrete gate driver transistors when interfacing with 3.3 V/5 V MCUs |
| ECOPACK® compliance | Lead-free second-level interconnect meets JEDEC JESD97; RoHS and REACH compliant |
| 125 °C max junction temp | Supports operation in enclosed appliances with limited airflow and elevated ambient temperatures |
Applications
| Electrovalve Control | Fan Speed Regulation |
|---|---|
Use Scenario: On/off cycling of solenoid-based water/gas valves in washing machines and dishwashers. IC Role / Device Role / Timing Role: Bidirectional AC switch replacing mechanical relays to reduce wear and acoustic noise. Use Value: 10 mA IGT enables direct MCU GPIO drive; 600 V VDRM accommodates 230 VAC mains with safety margin. | Use Scenario: Phase-angle dimming of shaded-pole or PSC fans in HVAC and kitchen appliances. IC Role / Device Role / Timing Role: Main power switch synchronized to zero-crossing detection for EMI reduction. Use Value: 100 V/µs dV/dt rating prevents false triggering during rapid voltage transitions in phase-cut waveforms. |
| Small Lamp Dimming | Door Lock Actuation |
Use Scenario: Dimmable incandescent/halogen lighting in smart home wall switches. IC Role / Device Role / Timing Role: AC mains switch implementing leading-edge or trailing-edge dimming protocols. Use Value: 4 A IT(RMS) supports up to 920 W resistive load at 230 VAC; TO-202-3 allows compact PCB layout. | Use Scenario: Momentary energization of electromagnetic door locks in access control systems. IC Role / Device Role / Timing Role: High-surge-capable AC switch handling 20 A inrush for 20 ms during lock engagement. Use Value: 20 A ITSM rating matches typical solenoid inrush profiles; 2.2 A²s I²t ensures robustness against repeated actuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT134-600D | 4 A IT(RMS), 600 V VDRM, but 15 mA IGT (higher gate drive requirement) | Less suitable for low-power MCU outputs without buffer stage | Select when gate drive margin is available and legacy footprint compatibility is needed |
| Z0409MF | Same electrical specs and TO-202-3 package, but tube packing differs (0AA2 vs. unspecified) | No functional difference; identical performance and board layout | Prefer for volume procurement where packaging consistency with existing BOM is required |
Compared with BT134-600D, Z0409DF 1AA2 offers lower gate drive demand (10 mA vs. 15 mA), easing MCU interface; versus Z0409MF, it guarantees tube delivery mode (0AA2), ensuring consistent logistics handling for production lines.
Availability
Z0409DF 1AA2 is available at Aetrix Electronics and suitable for home appliance electrovalve control, fan speed regulation, small lamp dimming, and door lock actuation requiring stable component supply across industrial and consumer OEM programs.
Supply support for Z0409DF 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
Z0409DF 1AA2 belongs to the Z04 Standard Triacs product line, engineered for cost-sensitive, high-reliability AC switching in white goods and building automation where gate sensitivity and surge robustness are critical.
FAQ
What is the maximum junction temperature for Z0409DF 1AA2?
The maximum operating junction temperature is +125 °C, as specified in Table 1 under Tj. This limit governs thermal design - sustained operation near this temperature requires derating of IT(RMS) per Figure 2, and junction-to-ambient thermal resistance must be managed via PCB copper area or heatsinking.
Can Z0409DF 1AA2 be triggered using only a microcontroller GPIO pin?
Yes - with a 10 mA maximum IGT and typical VGT ≤1.3 V, a 3.3 V or 5 V MCU GPIO can directly drive the gate through a current-limiting resistor (e.g., 330 Ω for ~10 mA at 3.3 V). No external transistor buffer is needed, provided the MCU pin supports 10 mA sink/source.
Is Z0409DF 1AA2 compatible with zero-crossing SSR drive circuits?
No - Z0409DF 1AA2 is a standard sensitive-gate triac, not a zero-crossing type. It triggers immediately upon gate signal regardless of AC phase. For zero-crossing operation, an external zero-crossing detector IC (e.g., MOC3041) must be used in conjunction with this triac.
What does the '0AA2' suffix indicate in the order code?
The '0AA2' denotes tube packaging mode per Table 5 and page 7 of the datasheet. It specifies that units are supplied in 50-piece plastic tubes, distinguishing it from bulk or tape-and-reel variants - critical for automated pick-and-place and inventory tracking in high-volume manufacturing.
Z0409DF 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:
- 400 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
Z0409DF 1AA2 FAQ
1.How can I place an order for Z0409DF 1AA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for Z0409DF 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 Z0409DF 1AA2 reliable?
The price and inventory of Z0409DF 1AA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0409DF 1AA2 is usually 5 days.
3.What payment methods are accepted for Z0409DF 1AA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0409DF 1AA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for Z0409DF 1AA2?
Z0409DF 1AA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your Z0409DF 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 Z0409DF 1AA2?
For technical support, including Z0409DF 1AA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0409DF 1AA2 requirements.
6.How does Aetrix verify that Z0409DF 1AA2 is sourced from the original manufacturer or authorized distributors?
All Z0409DF 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 Z0409DF 1AA2 meets industry standards.
7.What is the process for return or replacement of Z0409DF 1AA2?
All Z0409DF 1AA2 units undergo pre-shipment inspection (PSI). If there is an issue with Z0409DF 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 Z0409DF 1AA2 part is unused and in its original packaging.
Return procedure for Z0409DF 1AA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
Z0409DF 1AA2 Tags
-
Z0103NN5AA4
STMicroelectronics
-
Z0107MNT1G
Littelfuse Inc.
-
Z0103MNT1G
Littelfuse Inc.
;;2.jpg)
-
T405-800B-TR
STMicroelectronics
-
T835-600B-TR
STMicroelectronics
.JPG)
-
2N6073BG
Littelfuse Inc.
-
2N6075BG
Littelfuse Inc.
-
BTA08-600CWRG
STMicroelectronics
-
T835H-6G-TR
STMicroelectronics
-
BTA16-800BRG
STMicroelectronics
-
T1210-800G-TR
STMicroelectronics
-
MAC4DHMT4G
Littelfuse Inc.
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
