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STMicroelectronics Z0405DF 1AA2
- Part No.:
- Z0405DF 1AA2
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-202 No Tab
- Datasheet:
-
Z0405DF 1AA2.pdf
- Description:
- TRIAC SENS GATE 400V 4A TO202-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
Z0405DF 1AA2 from STMicroelectronics is a 4 A, 600 V RMS triac in TO-202-3 package, optimized for microcontroller-driven AC switching with 5 mA gate trigger current (Q1 quadrant), low on-state voltage (2.0 V max at 5.5 A), and robust dV/dt immunity (20 V/µs min). It is used in home appliance electrovalves, pump controls, and fan speed regulators requiring reliable zero-crossing–independent turn-on.
For engineers reviewing the Z0405DF 1AA2 datasheet, Z0405DF 1AA2 pinout, Z0405DF 1AA2 application, or Z0405DF 1AA2 equivalent, key selection criteria include gate sensitivity (5 mA), blocking voltage (600 V), thermal resistance (15 °C/W junction-to-lead), surge rating (20 A non-repetitive), and TO-202-3 mechanical compatibility with PCB-mounted heat sinking.
Technical Context
This triac operates in all four quadrants with verified Q1 and Q3 triggering capability, enabling phase-angle control without external gate polarity management. Its 20 A/µs critical dI/dt rating ensures reliable commutation under inductive loads when paired with snubber networks.
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 operation above 25 °C ambient. The 2.2 A²s I²t fusing value defines short-circuit withstand time under 10 ms pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A - Sustained AC load current capacity with proper heatsinking |
| VDRM / VRRM | 600 V - Peak repetitive off-state voltage blocking capability |
| IGT (Q1) | 5 mA - Minimum gate current required to trigger in quadrant I, compatible with MCU GPIO drive |
| dV/dt (min) | 20 V/µs - Minimum rate of voltage rise before false triggering; determines snubber sizing |
| Rth(j-l) | 15 °C/W - Junction-to-lead thermal resistance; defines heatsink interface requirement |
| VTM (max) | 2.0 V - Maximum on-state voltage drop at 5.5 A, determining conduction loss |
| I²t (fusing) | 2.2 A²s - Energy threshold for fuse-like failure under short-circuit pulse |
Pinout & Package
Package: TO-202-3 (ECOPACK® lead-free, 0.8 g unit weight, tube packaging). Standard pin assignment with isolated tab (A2) for heatsink mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Main Terminal 1 | Reference terminal for gate drive; connected to load return or neutral side |
| A2 | Main Terminal 2 | High-side main terminal; electrically isolated metal tab for heatsink attachment |
| G | Gate | Control input; triggers conduction when ≥5 mA applied between G and A1 in Q1 |
Key Features
| Feature | Design Value |
|---|---|
| Quadrant I/III triggering | Enables direct microcontroller control without polarity reversal circuitry |
| Low IGT (5 mA) | Reduces gate driver component count and power consumption vs. higher-sensitivity variants |
| High dV/dt immunity (20 V/µs) | Minimizes false triggering in noisy AC line environments without oversized snubbers |
| ECOPACK® compliance | Lead-free second-level interconnect meeting JEDEC JESD97 marking and soldering standards |
Applications
| Home Appliance Electrovalve Control | Fan Speed Regulation |
|---|---|
Use Scenario: On/off control of 230 VAC solenoid valves in washing machines and dishwashers. IC Role / Device Role / Timing Role: Bidirectional AC switch replacing mechanical relays; triggered by MCU PWM or logic-level signal. Use Value: Eliminates relay wear-out and acoustic noise while supporting compact PCB layout with integrated heatsinking via A2 tab. | Use Scenario: Phase-angle dimming of universal motor fans in HVAC systems and air purifiers. IC Role / Device Role / Timing Role: Main power switch in leading-edge phase-control topology; gated at precise points in AC half-cycle. Use Value: Enables smooth, stepless speed adjustment with <5 mA gate drive-compatible with standard 3.3 V/5 V MCU outputs. |
| Pump Motor Switching | Small Lamp Dimming |
Use Scenario: Cycling 120/230 VAC centrifugal pumps in coffee machines and water dispensers. IC Role / Device Role / Timing Role: Zero-voltage turn-off capable AC switch handling inductive kickback during de-energization. Use Value: Withstands 21 A surge (60 Hz) and 2.2 A²s fault energy, ensuring reliability across thousands of pump start-stop cycles. | Use Scenario: Dimmable lighting control for decorative LED drivers or incandescent bulbs in smart home panels. IC Role / Device Role / Timing Role: AC mains switch in trailing-edge or hybrid dimmer circuits; driven by optocoupler-isolated gate signal. Use Value: 600 V blocking voltage accommodates global mains (120–230 VAC) with margin; TO-202-3 allows surface-mount-compatible through-hole assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT134-600E | 4 A IT(RMS), 600 V VDRM, 5 mA IGT, but TO-92 package (no heatsink tab) | Limited to <1 A continuous without external heatsink; unsuitable for pump/fan loads | Select only for low-power, space-constrained PCBs where thermal budget permits |
| Z0405MF | Identical electrical specs, same TO-202-3 package, but marked "0AA2" instead of "1AA2" - different tube packing code | No functional difference; identical performance and footprint | Drop-in replacement if tube packaging format matches production line requirements |
Compared with BT134-600E, Z0405DF 1AA2 delivers superior thermal management via its isolated A2 tab; versus Z0405MF, it differs only in packing label-not in electrical or mechanical behavior-making it suitable for traceability-driven manufacturing.
Availability
Z0405DF 1AA2 is available at Aetrix Electronics and suitable for home appliance electrovalve control, fan speed regulation, and pump motor switching requiring stable component supply across multi-year production cycles.
Supply support for Z0405DF 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.
The Z04 series belongs to ST's general-purpose power discrete portfolio, engineered specifically for cost-sensitive, high-volume AC switching in white goods and building automation systems.
FAQ
What is the maximum junction temperature for continuous operation?
The Z0405DF 1AA2 has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at full 4 A RMS requires maintaining Tj ≤ 125 °C via heatsinking, given its 15 °C/W junction-to-lead thermal resistance and 100 °C/W junction-to-ambient rating.
Can this triac be triggered directly from a 3.3 V microcontroller GPIO?
Yes - with a series resistor limiting gate current to ≥5 mA (e.g., 470 Ω from 3.3 V yields ~7 mA), the Z0405DF 1AA2 triggers reliably in Quadrant I. No level-shifting or buffer stage is needed, provided the MCU GPIO can source ≥10 mA peak.
Is a snubber circuit required for inductive loads?
A snubber is recommended for inductive loads (e.g., pumps, fans) to suppress voltage spikes exceeding 600 V and prevent false triggering. The device's 20 V/µs dV/dt rating sets minimum RC snubber values; typical design uses 100 Ω + 100 nF across A1–A2.
Does the "1AA2" suffix indicate a revision or packaging variant?
"1AA2" denotes tube packaging mode per ST's ordering scheme - "0AA2" and "1AA2" both indicate tube delivery; the digit change reflects internal ST logistics coding, not electrical or mechanical differences. Both are functionally identical and interchangeable.
Z0405DF 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):
- 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
Z0405DF 1AA2 FAQ
1.How can I place an order for Z0405DF 1AA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for Z0405DF 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 Z0405DF 1AA2 reliable?
The price and inventory of Z0405DF 1AA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0405DF 1AA2 is usually 5 days.
3.What payment methods are accepted for Z0405DF 1AA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0405DF 1AA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for Z0405DF 1AA2?
Z0405DF 1AA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your Z0405DF 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 Z0405DF 1AA2?
For technical support, including Z0405DF 1AA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0405DF 1AA2 requirements.
6.How does Aetrix verify that Z0405DF 1AA2 is sourced from the original manufacturer or authorized distributors?
All Z0405DF 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 Z0405DF 1AA2 meets industry standards.
7.What is the process for return or replacement of Z0405DF 1AA2?
All Z0405DF 1AA2 units undergo pre-shipment inspection (PSI). If there is an issue with Z0405DF 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 Z0405DF 1AA2 part is unused and in its original packaging.
Return procedure for Z0405DF 1AA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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