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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics Z0109MUF

Name: Z0109MUF
Brand: STMicroelectronics
SKU: Z0109MUF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: Z0109MUF

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: 3-SMB, Flat Leads

Datasheet:: Z0109MUF.pdf

Description:: TRIAC SENS GATE 600V 1A SMBFLAT

Quantity:: RFQ Add To RFQ list

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Inventory:25,000

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Product details

Overview

Z0109MUF from STMicroelectronics is a 1 A, 600 V RMS-rated sensitive-gate triac in SMBflat-3L package, designed for AC phase-control switching in microcontroller-driven home appliance loads including electrovalves, pumps, and lamp dimmers. It features 10 mA max gate trigger current (IGT), 1.6 V max on-state voltage (VT), and 400 mΩ dynamic resistance at 125 °C - enabling direct GPIO drive with minimal external buffering.

For engineers reviewing the Z0109MUF datasheet, Z0109MUF pinout, Z0109MUF application, or Z0109MUF equivalent, this part supports low-power AC load control where thermal efficiency, gate sensitivity, and surface-mount reliability are critical - especially in space-constrained, thermally managed PCBs for white goods and small motor controllers.

Technical Context

Z0109MUF operates as a bidirectional thyristor with four-quadrant triggering capability (Q1–Q4), supporting both positive and negative half-cycle conduction. Its 10 mA IGT (max) at 25 °C and guaranteed 5% minimum IGT allow robust turn-on across temperature (-40 to +125 °C junction) with standard 3.3 V/5 V MCU outputs.

The device delivers 1 A RMS on-state current with thermal resistance R_th(j-t) = 14 °C/W (junction-to-tab) and R_th(j-a) = 75 °C/W (junction-to-ambient, 5 cm² copper), enabling stable operation up to 107 °C tab temperature in SMBflat-3L configuration without forced cooling.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	1 A - Sustains continuous AC load current in fan speed controllers or solenoid drivers without derating at T_tab ≤ 107 °C.
VDRM / VRRM	600 V - Blocks line transients up to 600 V peak in 230 VAC mains applications with safety margin.
IGT (Q1)	10 mA max - Compatible with standard microcontroller GPIOs (e.g., STM32, ESP32) without external driver transistor.
VT (ITM = 1.4 A)	1.60 V max - Limits conduction loss to <1.2 W at full RMS current, reducing thermal stress in compact layouts.
dV/dt (min)	50 V/µs - Resists false triggering from EMI or fast-rising noise on AC lines without snubber networks.
R_th(j-t)	14 °C/W - Enables efficient heat transfer to PCB copper pad, supporting >0.8 A RMS in free-air with 5 cm² thermal pad.
I_H	10 mA max - Ensures reliable hold-on during zero-crossing dimming cycles with low-current inductive loads.

Pinout & Package

SMBflat-3L is a surface-mount, 3-terminal flat lead package with exposed thermal pad; terminals are arranged linearly (A2–A1–G) with G centered between A1 and A2. The package meets UL94 V0, is halogen-free, and supports reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
A2	Main terminal 2 (anode 2)	High-side AC line connection; carries full load current in both half-cycles; electrically tied to thermal tab.
A1	Main terminal 1 (anode 1)	Low-side AC load return path; referenced to gate for triggering; forms main conduction path with A2.
G	Gate	Control input for bidirectional turn-on; requires ≥10 mA pulse (Q1/Q3) to initiate conduction in either polarity.

Key Features

Feature	Design Value
Four-quadrant triggering	Enables gate control on both positive and negative half-cycles without polarity-sensitive circuitry.
Sensitive 10 mA IGT	Eliminates need for discrete gate driver stages when interfacing with 3.3 V/5 V MCUs in cost-sensitive designs.
14 °C/W R_th(j-t)	Allows direct thermal coupling to PCB copper, achieving >0.9 A RMS derated performance without heatsinks.
50 V/µs dV/dt immunity	Reduces risk of spurious turn-on in noisy industrial or appliance environments without external RC snubbers.
ECOPACK® compliant	Lead-free plating and halogen-free molding compound meet RoHS and REACH environmental requirements.

Applications

Electrovalve Control

Fan Speed Regulation

Use Scenario: On/off control of 230 VAC water inlet valves in washing machines and dishwashers.

IC Role / Device Role / Timing Role: Bidirectional AC switch triggered by MCU PWM output synchronized to zero-crossing detection.

Use Value: 10 mA IGT ensures reliable valve actuation using internal MCU GPIOs; SMBflat-3L footprint minimizes board area in tight control modules.

Use Scenario: Phase-angle dimming of universal motor fans in HVAC units and kitchen hoods.

IC Role / Device Role / Timing Role: Main AC power switch modulated by MCU-generated gate pulses to adjust average motor voltage.

Use Value: 50 V/µs dV/dt rating prevents misfiring during rapid motor commutation transients; 1 A RMS handles peak startup currents.

Lamp Dimming

Pump Motor Switching

Use Scenario: Leading-edge dimming of incandescent and halogen lamps in smart lighting controls.

IC Role / Device Role / Timing Role: AC line switch activated at programmable phase angle to regulate RMS lamp voltage.

Use Value: 1.6 V VT limits conduction loss to <1.2 W, avoiding thermal runaway in enclosed lamp housings.

Use Scenario: Start/stop control of 230 VAC submersible pumps in coffee machines and water dispensers.

IC Role / Device Role / Timing Role: Solid-state replacement for mechanical relays, driven by low-voltage MCU logic.

Use Value: 8.5 A non-repetitive surge rating (60 Hz) accommodates pump inrush currents without failure.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Z0107MUF	5 mA max IGT, same 600 V VDRM and SMBflat-3L package	Lower gate drive requirement suits ultra-low-power MCUs or battery-backed controllers	Select when gate drive current budget is ≤5 mA and higher sensitivity is needed without changing layout.
Z0109MN	Same 10 mA IGT and 600 V rating, but in SOT-223 package (R_th(j-t) = 25 °C/W)	Higher thermal resistance requires larger copper area or lower RMS current vs. SMBflat-3L	Choose only if SOT-223 is already standardized in design; otherwise prefer Z0109MUF for better thermal performance.

Compared with Z0107MUF, Z0109MUF trades slightly higher gate current for improved dV/dt immunity (50 vs. 20 V/µs) and tighter I_H control (10 vs. 15 mA), while Z0109MN offers identical electrical specs but inferior thermal dissipation - making Z0109MUF optimal for thermally constrained, high-noise AC switching.

Availability

Z0109MUF is available at Aetrix Electronics and suitable for home appliance control, fan speed regulation, and lamp dimming requiring stable component supply with consistent SMBflat-3L packaging and ECOPACK compliance.

Supply support for Z0109MUF 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, specializing in power management, analog, MCU, and automotive ICs with broad industrial and consumer reach.

Z01 series triacs are part of ST's general-purpose power switching portfolio, engineered specifically for cost-effective, reliable AC load control in white goods and small appliances where gate sensitivity and thermal robustness are essential.

FAQ

What is the maximum junction temperature for continuous operation?

The Z0109MUF has an operating junction temperature range of -40 to +125 °C. Continuous operation at 125 °C is permitted only when tab temperature remains ≤107 °C (per SMBflat-3L rating), and thermal design ensures R_th(j-t) × P_loss does not exceed 18 °C rise above tab temperature.

Can Z0109MUF be used with 3.3 V microcontrollers without a gate driver?

Yes - its 10 mA max IGT (Q1) at 25 °C and guaranteed 5% minimum IGT allow direct drive from 3.3 V GPIOs delivering ≥10 mA sink/source, provided gate pulse width exceeds 10 µs and layout minimizes trace inductance to avoid false triggering.

Is a snubber circuit required for Z0109MUF in resistive lamp loads?

No snubber is required for purely resistive loads like incandescent lamps due to its 50 V/µs dV/dt immunity and absence of inductive kickback; however, a 100 Ω + 100 nF RC snubber is recommended for inductive motor or pump loads to suppress voltage spikes during turn-off.

How does SMBflat-3L compare thermally to TO-92 and SOT-223 packages in this series?

SMBflat-3L offers R_th(j-t) = 14 °C/W - significantly better than TO-92 (60 °C/W) and SOT-223 (25 °C/W) - enabling 0.9 A RMS operation on 5 cm² copper versus 0.5 A (SOT-223) or 0.3 A (TO-92) under identical ambient conditions, making it optimal for compact, high-density boards.

Z0109MUF Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 3-SMB, Flat Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

Triac Type:: Logic - Sensitive Gate

Voltage - Off State:: 600 V

Current - On State (It (RMS)) (Max):: 1 A

Voltage - Gate Trigger (Vgt) (Max):: 1.3 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 8A, 8.5A

Current - Gate Trigger (Igt) (Max):: 10 mA

Current - Hold (Ih) (Max):: 10 mA

Configuration:: Single

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMBflat-3L

Z0109MUF FAQ

1.How can I place an order for Z0109MUF through Aetrix?

Please submit a Request for Quotation (RFQ) for Z0109MUF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for Z0109MUF reliable?

The price and inventory of Z0109MUF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0109MUF is usually 5 days.

3.What payment methods are accepted for Z0109MUF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0109MUF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for Z0109MUF?

Z0109MUF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your Z0109MUF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for Z0109MUF?

For technical support, including Z0109MUF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0109MUF requirements.

6.How does Aetrix verify that Z0109MUF is sourced from the original manufacturer or authorized distributors?

All Z0109MUF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that Z0109MUF meets industry standards.

7.What is the process for return or replacement of Z0109MUF?

All Z0109MUF units undergo pre-shipment inspection (PSI). If there is an issue with Z0109MUF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The Z0109MUF part is unused and in its original packaging.

Return procedure for Z0109MUF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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