Z0405MF 1AA2 STMicroelectronics Triac A (Transistor Outline, Vertical) In Stock
Z0405MF 1AA2 is a 600 V, 4 A TRIAC from STMicroelectronics with a 1.3 V gate trigger voltage and 5 mA gate trigger current in a 3-pin TO-202 vertical transistor outline package. It provides bidirectional AC power switching for light dimmers, motor speed controllers, and appliance load control. Available from stock with worldwide fast shipping.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- Z0405MF 1AA2 Datasheet PDF
- Category
- Triac A
- Price
- From $0.3680(MOQ 10)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 600 V blocking voltage and 4 A RMS on-state current rating enabling direct AC mains load switching at 120 V and 230 V
- Low 1.3 V gate trigger voltage and 5 mA gate trigger current allowing direct drive from low-voltage microcontroller I/O pins via optocoupler
- 3-pin TO-202 vertical through-hole package with bolt-down tab for easy heatsink mounting in high-current AC switching applications
Applications
Z0405MF 1AA2 is designed for AC mains load switching in household appliance controls, lamp dimmers, and electric motor speed regulators operating from 120 V or 230 V supply lines. Its low 5 mA gate trigger current makes it compatible with microcontroller-driven optocoupler circuits such as the MOC3020 series, enabling isolated zero-crossing or phase-angle control without a high-power gate driver. The TO-202 package allows the TRIAC to be mounted directly to a chassis or clip heatsink for continuous 4 A RMS load switching in fan controllers and heating element regulators.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What blocking voltage and on-state current does Z0405MF 1AA2 support for AC mains switching?
Z0405MF 1AA2 is rated for 600 V repetitive peak off-state voltage and 4 A RMS on-state current. The 600 V blocking voltage provides a 2.6x safety margin above the 230 V AC mains peak of approximately 325 V, while the 4 A current rating supports loads up to 920 W at 230 V without additional current derating in typical room-temperature appliance environments.
Can Z0405MF 1AA2 be driven directly from a microcontroller GPIO, and what interface circuit is needed?
Z0405MF 1AA2 requires only 1.3 V gate trigger voltage and 5 mA gate trigger current, which is too low to safely drive directly from a 3.3 V MCU GPIO connected to a live AC line. An optocoupler such as the MOC3020 or MOC3041 should be used for galvanic isolation, providing the 5 mA gate pulse to the TRIAC while keeping the microcontroller below 50 V isolation barrier requirements.
For a 230 V lamp dimmer design, how should Z0405MF 1AA2 be thermally managed in the TO-202 package?
The TO-202 3-pin vertical package has a mounting hole tab that attaches to an aluminum heatsink or chassis. At 4 A RMS continuous current with a typical 1.5 V on-state voltage, the TRIAC dissipates approximately 6 W, requiring a heatsink with thermal resistance below 15°C/W to keep junction temperature under 125°C at 40°C ambient. A small clip-on aluminum extrusion heatsink rated at 10°C/W to 12°C/W is typically sufficient for 4 A dimmer designs.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $0.4100 | $4.10 |
| 50+ | $0.3890 | $19.45 |
| 100+ | $0.3680 | $36.80 |
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