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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics Z0405MF0AA2

Name: Z0405MF0AA2
Brand: STMicroelectronics
SKU: Z0405MF0AA2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: Z0405MF0AA2

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-202 No Tab

Datasheet:: Z0405MF0AA2.pdf

Description:: TRIAC SENS GATE 600V 4A TO202-3

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Product details

Overview

Z0405MF0AA2 from STMicroelectronics is a 4 A, 600 V RMS sensitive-gate triac in TO-202-3 package, rated for 5 mA gate trigger current (IGT) in Quadrants I, II, III, and IV, with 20 A non-repetitive surge capability and 15 °C/W junction-to-lead thermal resistance - used for microcontroller-driven AC load switching in home appliance electrovalves and fan speed controllers.

For engineers reviewing the Z0405MF0AA2 datasheet, Z0405MF0AA2 pinout, Z0405MF0AA2 application, or Z0405MF0AA2 equivalent, key selection criteria include gate sensitivity (5 mA), blocking voltage (600 V), RMS current rating (4 A), thermal resistance (15 °C/W), and TO-202-3 mechanical compatibility with PCB-mount AC control circuits.

Technical Context

This triac operates in all four quadrants with symmetrical triggering behavior, enabling phase-angle and zero-crossing AC switching without external polarity conditioning. Its 5 mA IGT allows direct drive from 3.3 V/5 V MCU GPIOs with minimal series resistance.

Designed for full-sine-wave conduction, it sustains 4 A RMS at 25 °C ambient with derating to ~2.5 A at 75 °C, supported by 15 °C/W R_th(j–l) for heatsink-coupled mounting. Critical dV/dt immunity starts at 20 V/µs (min) under specified conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	4 A - Sustains continuous AC load current up to 4 A RMS with adequate heatsinking at 25 °C ambient
VDRM / VRRM	600 V - Blocks up to 600 V peak AC line voltage in both directions before conduction
IGT (Q1–Q4)	5 mA max - Guaranteed turn-on with ≤5 mA gate current across all quadrants, enabling direct MCU drive
ITSM (50 Hz)	20 A - Withstands single half-cycle surge of 20 A (20 ms), suitable for motor startup inductance
Rth(j–l)	15 °C/W - Junction-to-lead thermal resistance enables efficient heat transfer to PCB copper or clip-on heatsink
dV/dt (c)	1 V/µs min - Minimum rate of voltage rise that avoids false triggering with gate open at 110 °C junction
VTM @ 5.5 A	2.0 V max - On-state voltage drop ≤2.0 V at 5.5 A pulse, limiting conduction loss to ≤11 W peak

Pinout & Package

TO-202-3 package: insulated plastic case with three leads - A1 (MT1), A2 (MT2), and G (gate) - designed for through-hole mounting and manual soldering per JEDEC MS-012. Lead finish is lead-free per ECOPACK® specification.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	AC load return path; bidirectional current terminal referenced to A2 during conduction
A2 (MT2)	Main Terminal 2	AC line input or output path; forms main current loop with A1 and gate-controlled channel
G	Gate	Control electrode accepting ≤5 mA DC pulse to initiate conduction in any quadrant

Key Features

Feature	Design Value
Quadrant I–IV operation	Enables universal AC phase control without external polarity inversion circuitry
5 mA gate trigger sensitivity	Allows direct interface with low-drive MCU outputs (e.g., STM32 GPIO) using only a 1 kΩ series resistor
ECOPACK® lead-free package	Complies with RoHS and JEDEC JESD97 marking standards; no lead contamination in second-level interconnect
20 A non-repetitive surge rating	Supports inrush current handling for small AC motors and solenoids without external snubbers

Applications

Home Appliance Electrovalve Control

Fan Speed Controller

Use Scenario: Precise on/off timing of water/gas solenoid valves in washing machines and dishwashers using microcontroller-generated trigger pulses.

IC Role / Device Role / Timing Role: Triac acting as bidirectional AC power switch, triggered once per half-cycle to energize 24 VAC or 115 VAC solenoid coils.

Use Value: 5 mA IGT ensures reliable turn-on from 3.3 V MCU pins; 600 V VDRM accommodates mains transients without failure.

Use Scenario: Phase-angle dimming of universal AC motors in ceiling fans and exhaust units via variable conduction angle.

IC Role / Device Role / Timing Role: Main switching element in leading-edge phase-control circuit, synchronized to zero-crossing detection.

Use Value: 4 A IT(RMS) supports typical 60–100 W fan loads; 20 V/µs dV/dt immunity prevents false triggering during commutation.

Small Lamp Dimmer

Door Lock Actuator Driver

Use Scenario: Mains-connected incandescent/halogen lamp dimming in residential lighting systems with analog or digital potentiometer input.

IC Role / Device Role / Timing Role: AC power switch modulating RMS voltage delivered to lamp filament via adjustable firing angle.

Use Value: TO-202-3 package allows compact PCB layout; 2.0 V VTM limits conduction loss to <1 W at 2 A load.

Use Scenario: Controlled energization of electromagnetic door locks in access control panels powered from 24 VAC or 115 VAC supplies.

IC Role / Device Role / Timing Role: Solid-state replacement for mechanical relays, providing silent, bounce-free switching with precise timing.

Use Value: 15 °C/W Rth(j–l) permits sustained 4 A operation with minimal copper area; 100 °C/W Rth(j–a) defines natural-convection limits.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BT134-600E	4 A IT(RMS), 600 V VDRM, but 10 mA IGT - requires higher gate drive strength	Less suitable for direct 3.3 V MCU drive without buffer transistor	Select when legacy design uses BT134 footprint and gate drive circuit already includes amplification
Z0405MF	Identical electrical specs, but packaged in bulk (not tube); same TO-202-3 mechanical form	No functional difference - differs only in packaging and traceability	Select for high-volume automated assembly where tube packaging is not required

Compared with BT134-600E, Z0405MF0AA2 offers lower gate drive demand (5 mA vs. 10 mA), improving MCU compatibility; versus Z0405MF, the 0AA2 suffix denotes tube packaging with controlled quantity (50 pcs) and enhanced traceability for production audits.

Availability

Z0405MF0AA2 is available at Aetrix Electronics and suitable for home appliance electrovalve control, fan speed regulation, and small lamp dimming requiring stable component supply and consistent gate sensitivity across production batches.

Supply support for Z0405MF0AA2 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

Z04 series triacs belong to ST's power discrete portfolio, engineered specifically for cost-sensitive, high-reliability AC switching in white goods and building automation where gate sensitivity and thermal robustness are critical.

FAQ

What is the maximum junction temperature for continuous operation?

The Z0405MF0AA2 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 - e.g., ≤2.5 A at 75 °C ambient with Rth(j–l) = 15 °C/W and no additional heatsinking.

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

Yes - with IGT ≤5 mA guaranteed across all quadrants and VGT ≤1.3 V, a 3.3 V MCU GPIO can drive the gate through a 470 Ω series resistor, delivering ~6.4 mA initial current while staying within PG(AV) = 0.2 W average gate power limit.

Is a snubber circuit required for inductive loads?

A snubber (RC network) is recommended for inductive loads like motors or solenoids to suppress dV/dt-induced false triggering. The device's (dV/dt)c = 1 V/µs minimum requires external protection when switching loads with high L/R ratios or fast current decay.

What does the '0AA2' suffix indicate in the part number?

The '0AA2' suffix specifies tube packaging: 50 pieces per tube, lead-free ECOPACK® compliance, and updated revision labeling per ST's May 2006 documentation. It replaces earlier bulk-packaged variants and enables lot traceability for quality-critical applications.

Z0405MF0AA2 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-202 No Tab

Packaging:: Tube

Product Status:: Obsolete

Triac Type:: Logic - Sensitive Gate

Voltage - Off State:: 600 V

Current - On State (It (RMS)) (Max):: 4 A

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 20A, 21A

Current - Gate Trigger (Igt) (Max):: 5 mA

Current - Hold (Ih) (Max):: 5 mA

Configuration:: Single

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-202-3

Z0405MF0AA2 FAQ

1.How can I place an order for Z0405MF0AA2 through Aetrix?

Please submit a Request for Quotation (RFQ) for Z0405MF0AA2 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 Z0405MF0AA2 reliable?

The price and inventory of Z0405MF0AA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0405MF0AA2 is usually 5 days.

3.What payment methods are accepted for Z0405MF0AA2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0405MF0AA2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for Z0405MF0AA2?

Z0405MF0AA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your Z0405MF0AA2 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 Z0405MF0AA2?

For technical support, including Z0405MF0AA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0405MF0AA2 requirements.

6.How does Aetrix verify that Z0405MF0AA2 is sourced from the original manufacturer or authorized distributors?

All Z0405MF0AA2 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 Z0405MF0AA2 meets industry standards.

7.What is the process for return or replacement of Z0405MF0AA2?

All Z0405MF0AA2 units undergo pre-shipment inspection (PSI). If there is an issue with Z0405MF0AA2, 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 Z0405MF0AA2 part is unused and in its original packaging.

Return procedure for Z0405MF0AA2:

1.Submit a request within 90 days.

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

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