STMicroelectronics Z0110NA 1AA2

Overview

Z0110NA from STMicroelectronics is a 1 A, 800 V RMS-rated sensitive-gate triac in TO-92 package, designed for AC phase-control switching in low-power consumer electronics. It delivers 25 mA maximum gate trigger current (IGT), 1.6 V max on-state voltage at 25 °C, and supports dV/dt immunity up to 100 V/µs - enabling direct microcontroller drive in electrovalve, lamp dimmer, and small motor control circuits.

For engineers reviewing the Z0110NA datasheet, Z0110NA pinout, Z0110NA application, or Z0110NA equivalent, this part is selected for cost-sensitive, thermally constrained AC load switching where gate sensitivity, thermal robustness (Tj = −40 to +125 °C), and lead-free TO-92 compatibility are critical design requirements.

Technical Context

The Z0110NA operates as a bidirectional thyristor with four-quadrant triggering capability, supporting both positive and negative gate-to-A1 polarity. Its 25 mA IGT (Q1) rating ensures reliable turn-on under marginal drive conditions, while its 100 V/µs dV/dt immunity at 110 °C prevents false triggering during high-noise AC line transients.

Thermal performance is defined by Rth(j-l) = 60 °C/W (junction-to-lead), limiting continuous RMS current to 1 A at TL = 50 °C per Table 1. The device uses standard silicon planar construction and meets ECOPACK environmental compliance with halogen-free molding resin and lead-free plating.

Key Specifications

Pinout & Package

Package: TO-92 (straight leads), plastic body, lead-free plating, UL94 V0 epoxy. Thermal resistance Rth(j-l) = 60 °C/W enables 1 A RMS operation at lead temperature ≤ 50 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac-based AC switching applications.

Compared with Z0110MA and BT134-800, Z0110NA uniquely balances 800 V blocking, 25 mA gate sensitivity, and TO-92 thermal performance - making it optimal for new 230 VAC appliance designs requiring direct MCU interface and compact footprint.

Availability

Z0110NA is available at Aetrix Electronics and suitable for home appliance control, AC fan speed regulation, and solenoid actuation requiring stable component supply across extended production lifecycles.

Supply support for Z0110NA 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

Z01 series triacs are part of ST's general-purpose power switching portfolio, engineered specifically for cost-effective, reliable AC load control in resource-constrained embedded systems.

FAQ

What is the maximum allowable lead temperature for continuous 1 A RMS operation?

The Z0110NA supports 1 A RMS continuous current only when the lead temperature (TL) is held at or below 50 °C, as specified in Table 1's absolute maximum ratings. Exceeding this limit risks thermal runaway due to its 60 °C/W junction-to-lead thermal resistance - heatsinking or derating is required above 50 °C.

Can Z0110NA be driven directly from a 3.3 V microcontroller GPIO without a buffer?

Yes - with a 25 mA maximum IGT and typical VGT of 1.3 V, Z0110NA can be triggered directly by most 3.3 V MCUs using a series resistor (e.g., 100 Ω) to limit gate current to ~20 mA. No external transistor is needed, simplifying BOM and layout in space-constrained designs.

Does Z0110NA require a snubber circuit for inductive loads like pumps or valves?

A snubber is recommended for highly inductive loads (e.g., solenoids, motors) to suppress voltage spikes exceeding 800 V during turn-off. While Z0110NA's 100 V/µs dV/dt immunity helps, the absence of an RC snubber may cause premature failure under worst-case L·di/dt transients - especially in unregulated 230 VAC environments.

How does Z0110NA differ from Z0110NN in terms of package and thermal performance?

Z0110NA uses TO-92 with Rth(j-l) = 60 °C/W, limiting 1 A RMS to TL ≤ 50 °C; Z0110NN uses SOT-223 with Rth(j-t) = 25 °C/W, allowing 1 A at Ttab = 90 °C. TO-92 offers lower cost and through-hole assembly; SOT-223 enables higher power density and better thermal coupling to PCB copper.