Z0405NF 1AA2 STMicroelectronics Integrated Circuit (Transistor Outline, Vertical) In Stock
Z0405NF 1AA2 is a 4A 800V TRIAC from STMicroelectronics designed for AC power control in lighting and motor applications. Key specs include 4A RMS on-state current, 800V repetitive peak off-state voltage, and gate trigger sensitivity of 5mA at 1.3V. Available from $0.45 in stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- Z0405NF 1AA2 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5700(MOQ 100)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of Z0405NF 1AA2?
- 800V repetitive peak off-state voltage enables safe operation on 220V/240V AC mains without additional snubber complexity
- Low gate trigger current of 5mA at 1.3V allows direct drive from low-power microcontroller GPIO outputs
- TO-202 3-pin through-hole package provides robust mechanical mounting and natural heatsinking on leaded PCB designs
What is Z0405NF 1AA2 used for?
Z0405NF 1AA2 is commonly used in domestic light dimmers, fan speed controllers, and small AC motor soft-start circuits operating from 110V to 240V mains. Its low gate trigger sensitivity makes it compatible with optocoupler-based isolation circuits and microcontroller-driven phase-angle control stages. The TO-202 package suits through-hole production lines for white goods, HVAC control boards, and industrial relay replacement modules requiring compact AC switching.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the Z0405NF 1AA2 datasheet?
Z0405NF 1AA2 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for Z0405NF 1AA2?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum on-state current and off-state voltage rating of the Z0405NF 1AA2 TRIAC?
Z0405NF 1AA2 is rated for 4A RMS continuous on-state current and an 800V repetitive peak off-state voltage (VDRM/VRRM). This combination is well suited for mains-connected AC loads up to roughly 880W on a 220V circuit. A safety margin of at least 20% below rated current is recommended when operating near maximum ambient temperature without external heatsinking.
How sensitive is the gate trigger on Z0405NF 1AA2, and can it be driven directly from a microcontroller via an optocoupler?
The gate trigger requires a minimum current of 5mA at a gate-to-MT1 voltage of 1.3V, which is low enough for standard MOC3021 or MOC3041 optocoupler output stages. A 330-ohm series resistor on a 5V logic supply delivers approximately 10mA gate current, providing reliable quadrant-I and quadrant-III triggering. No additional buffer transistor is needed for most 3.3V or 5V microcontroller-based dimmer designs.
In which AC power-control applications does Z0405NF 1AA2 replace a mechanical relay with a cost advantage?
Z0405NF 1AA2 replaces mechanical relays in resistive loads such as heating elements, incandescent bulbs, and small induction motors up to 4A on 230V AC mains. Unlike relays, TRIACs have no moving parts, switch in under 1 µs, and tolerate millions of switching cycles without contact wear. The TO-202 package costs under $0.50 in volume, roughly half the price of an equivalent 5A PCB relay, making it the preferred choice for high-cycle dimmer and thermostat designs.
What is the operating temperature range of Z0405NF 1AA2, and how does junction temperature limit usable current in a plastic enclosure?
Z0405NF 1AA2 operates over a junction temperature range of -40°C to 125°C. In a sealed plastic enclosure without heatsinking, thermal resistance junction-to-ambient is approximately 60°C/W for TO-202, limiting continuous dissipation to about 1W at 25°C ambient — equivalent to roughly 2A RMS before derating. Above 2A, a small clip-on heatsink or copper pour is recommended to stay within the 125°C junction limit.
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Why Buy from FindMyChip
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 |
|---|---|---|
| 100+ | $0.6900 | $69.00 |
| 500+ | $0.5700 | $285.00 |
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