STMicroelectronics Z0110MN 5AA4

Overview

Z0110MN 5AA4 from STMicroelectronics is a 1 A, 800 V RMS-rated sensitive-gate triac in SOT-223 package, designed for AC phase-control switching in microcontroller-driven home appliance loads including electrovalves, pumps, and lamp dimmers. It features 25 mA maximum gate trigger current (IGT), 1.6 V max on-state voltage at 25 °C, and 20 A/µs critical rate of rise of on-state current (dl/dt).

For engineers reviewing the Z0110MN 5AA4 datasheet, Z0110MN 5AA4 pinout, Z0110MN 5AA4 application, or Z0110MN 5AA4 equivalent, this page delivers verified electrical specs, thermal derating curves, gate drive compatibility with 3.3 V/5 V MCUs, and real-world triac selection guidance for low-power AC load control.

Technical Context

This triac operates in all four quadrants with symmetrical triggering behavior, enabling bidirectional AC conduction without external polarity management. Its 25 mA IGT(Q1) rating allows direct drive from standard GPIO pins without buffer transistors, while dV/dt immunity ≥100 V/µs (at Tj = 110 °C) ensures noise-immune turn-on in noisy mains environments.

Thermal design is constrained by Rth(j-t) = 25 °C/W (junction-to-tab) and Rth(j-a) = 60 °C/W (junction-to-ambient, 5 cm² copper), requiring heatsinking for sustained >0.7 A RMS operation. The device supports full-cycle sine-wave conduction with ITSM = 8 A (50 Hz, 20 ms) non-repetitive surge capability.

Key Specifications

Pinout & Package

SOT-223 package with exposed tab (pin 4) serving as A2 (main terminal 2); compact surface-mount footprint optimized for thermal transfer to PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Z0110NN (TO-92) and Z0110MUF (SMBflat-3L), Z0110MN 5AA4 offers optimal balance of SMT manufacturability, thermal performance (Rth(j-t) = 25 °C/W), and proven reliability in high-volume home appliance production.

Availability

Z0110MN 5AA4 is available at Aetrix Electronics and suitable for home appliance control, electrovalve actuation, and fan speed regulation requiring stable component supply across multi-year production cycles.

Supply support for Z0110MN 5AA4 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, mixed-signal, power, and microcontroller products for industrial, automotive, and consumer markets.

Z01 series triacs are part of ST's general-purpose power switching portfolio, engineered specifically for cost-sensitive, low-to-medium power AC load control in white goods and smart home devices.

FAQ

What is the maximum junction temperature for continuous operation?

The Z0110MN 5AA4 has an operating junction temperature range of –40 °C to +125 °C. Continuous operation at 125 °C requires strict adherence to derated IT(RMS) limits per Figure 2 in DS2116 - at Ttab = 90 °C, maximum RMS current drops to ~0.75 A. Thermal design must ensure junction temperature remains within this limit under worst-case ambient and power dissipation conditions.

Can this triac be driven directly from a 3.3 V microcontroller GPIO?

Yes - with IGT(Q1) ≤ 25 mA and VGT ≤ 1.3 V, the Z0110MN 5AA4 can be driven directly from a 3.3 V MCU GPIO using a series resistor calculated to deliver ≥25 mA at VGPIO − VGT. For example, a 100 Ω resistor yields ~25 mA at 3.3 V, satisfying gate drive requirements without external buffers or level shifters.

Does it require a snubber circuit for inductive loads?

A snubber (RC network) is recommended for inductive loads like pumps or solenoids to suppress voltage spikes exceeding 800 V during turn-off. While dV/dt immunity is 100 V/µs, fast current decay in inductive loads can generate transient overvoltages that risk false triggering or device failure without proper clamping or damping.

How does the SOT-223 package compare thermally to TO-92 for this part?

The SOT-223 package provides significantly better thermal performance: Rth(j-t) = 25 °C/W versus TO-92's Rth(j-l) = 60 °C/W. This allows the Z0110MN 5AA4 to sustain higher RMS currents at the same tab temperature, and enables more compact PCB layouts with integrated heatsinking via the exposed A2 tab - unlike TO-92, which relies solely on lead conduction.