Z0103NA 2AL2 STMicroelectronics Triac A (Other) In Stock
The Z0103NA 2AL2 is a 1 A, 600 V standard TRIAC from STMicroelectronics in a compact SOT-223 package, providing bidirectional AC switching for light dimming, motor speed control, and solid-state relay applications. It features quadrant triggering capability and a gate trigger current of typically 5 mA for reliable operation from logic-level control circuits.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- Z0103NA 2AL2 Datasheet PDF
- Category
- Triac A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1 A RMS on-state current rating for small AC load switching up to 600 V
- 600 V repetitive peak off-state voltage for standard 100 V to 240 V AC mains applications
- Quadrant I, II, III, and IV gate triggering for flexible control circuit interfacing
- 5 mA typical gate trigger current compatible with optocoupler and logic-level drive
- SOT-223 surface-mount package enables compact PCB integration with good thermal dissipation
Applications
The Z0103NA 2AL2 is used in home appliance control circuits, lamp dimmers, and small AC motor speed regulators where a compact surface-mount TRIAC must switch 100 V to 240 V mains loads up to 1 A. Its low gate trigger current of 5 mA makes it easy to drive directly from an optocoupler output such as a MOC3021 series device, enabling galvanic isolation between the low-voltage control side and the AC power side. It is also applied in solid-state relay modules, HVAC fan controllers, and programmable load switches in building automation equipment.
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 is the maximum RMS load current and off-state voltage rating of the Z0103NA 2AL2 for AC mains switching?
The Z0103NA 2AL2 is rated for 1 A RMS on-state current and a repetitive peak off-state voltage of 600 V. These ratings cover standard 100 V to 240 V single-phase mains applications where resistive or lightly inductive loads such as incandescent lamps, small fans, or heating elements draw up to 1 A continuously without exceeding the device's thermal limits in a proper PCB heatsink layout.
How can the Z0103NA 2AL2 be triggered from a microcontroller or optocoupler without exceeding gate drive limits?
The Z0103NA 2AL2 requires a typical gate trigger current of 5 mA and a gate trigger voltage of around 1.3 V, which is well within the output capability of standard phototransistor optocouplers such as the MOC3021. A microcontroller can switch the optocoupler LED with a 5 V GPIO through a 270 Ω series resistor to deliver the required gate current while maintaining full galvanic isolation between the 3.3 V or 5 V logic circuit and the 240 V AC power circuit.
For a lamp-dimmer design, what advantages does the SOT-223 package of Z0103NA 2AL2 offer over a through-hole TO-92 TRIAC?
The SOT-223 package provides a larger exposed copper pad on the back than a TO-92 can, allowing better thermal conduction to the PCB copper pour without a separate heatsink clip. At 1 A continuous current with a typical on-state voltage drop of around 1.2 V, the device dissipates approximately 1.2 W, which a standard 2 cm² copper pour can handle at ambient temperatures up to 40°C. The surface-mount format also simplifies automated PCB assembly and eliminates lead-forming steps required for through-hole devices.
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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.
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