Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

STMicroelectronics Z0103DA 1AA2

Name: Z0103DA 1AA2
Brand: STMicroelectronics
SKU: Z0103DA 1AA2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: Z0103DA 1AA2

Manufacturer:: STMicroelectronics

Category:: TRIACs

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: Z0103DA 1AA2.pdf

Description:: TRIAC SENS GATE 400V 1A TO92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,772

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

Z0103DA 1AA2 from STMicroelectronics is a sensitive-gate triac in the Z01xxxN series, rated for 1 A RMS on-state current (T_tab = 90 °C), 400 V repetitive peak off-state voltage (V_DRM), and gate trigger current ≤ 3 mA at 25 °C. It uses TOP GLASS PNPN technology in SOT-223 package and is designed for AC load switching in compact surface-mount applications such as solid-state relays and motor speed controls.

For engineers reviewing the Z0103DA 1AA2 datasheet, Z0103DA 1AA2 pinout, Z0103DA 1AA2 application, or Z0103DA 1AA2 equivalent, key selection criteria include verified I_GT ≤ 3 mA, V_DRM = 400 V, dV/dt ≥ 10 V/µs (quadrant I–III), t_gt = 2 µs, and thermal resistance R_th(j-t) = 25 °C/W under 360° conduction.

Technical Context

This triac operates in all four quadrants with confirmed sensitivity grade "03", enabling reliable triggering with low gate drive. Its TOP GLASS structure delivers stable switching performance up to T_j = 125 °C and supports 8.5 A non-repetitive surge (8.3 ms) without latch-up.

Electrical behavior is defined by validated parameters: V_TM ≤ 1.8 V at 1.4 A, I_H ≤ 7 mA, and critical dI/dt = 10 A/µs (repetitive, 50 Hz). Gate characteristics are specified under standardized test conditions (V_D = 12 V DC, R_L = 140 Ω).

Key Specifications

Parameter	Value and Actual Design Meaning
IT(RMS)	1 A - maximum continuous AC load current at 90 °C tab temperature
VDRM / VRRM	400 V - peak blocking voltage in both directions, defining mains-compatible isolation
IGT (max)	3 mA - minimum gate drive required for turn-on, enabling direct MCU GPIO control
dV/dt (min)	10 V/µs - immunity to false triggering from voltage transients on AC line
tgt (typ)	2 µs - gate trigger delay time, supporting precise phase-angle control timing
Rth(j-t)	25 °C/W - junction-to-leads thermal resistance under full-conduction AC, guiding heatsink design
IH (max)	7 mA - holding current threshold below which device turns off, ensuring clean zero-crossing dropout

Pinout & Package

SOT-223 plastic package with three terminals: A1 (MT1), A2 (MT2), and G (Gate). Exposed tab is electrically connected to A2 and serves as primary thermal path.

Pin/Terminal	Circuit Role	Design Meaning
A1 (MT1)	Main Terminal 1	AC load return path; referenced for gate trigger polarity in Quadrants I & III
A2 (MT2)	Main Terminal 2	AC line input or high-side connection; tied to exposed tab for thermal conduction
G	Gate	Low-current control input; triggers conduction when I_G ≥ 3 mA with proper polarity

Key Features

Feature	Design Value
Quadrant I–III sensitivity	IGT ≤ 3 mA enables single-polarity gate drive in most AC control topologies
TOP GLASS PNPN structure	Improved dv/dt immunity and consistent turn-on behavior across temperature
Surface-mount SOT-223	0.11 g weight and standardized footprint support automated PCB assembly
Thermal performance	R_th(j-t) = 25 °C/W (360° AC) allows 1 A operation without external heatsink at T_tab ≤ 90 °C

Applications

Light Dimming Control

Fan Speed Regulation

Use Scenario: Phase-cut dimming of incandescent or halogen lamps using microcontroller-generated trigger pulses.

IC Role / Device Role / Timing Role: Bidirectional AC switch triggered at adjustable phase angle to regulate RMS voltage.

Use Value: Confirmed I_GT ≤ 3 mA and t_gt = 2 µs enable precise, jitter-free firing synchronized to zero-crossing detection.

Use Scenario: Variable-speed control of universal AC motors in portable fans and HVAC blowers.

IC Role / Device Role / Timing Role: Main power switch modulating average torque via leading-edge phase control.

Use Value: V_DRM = 400 V and dV/dt ≥ 10 V/µs ensure robust operation against motor back-EMF spikes.

SSR Output Stage

Appliance Power Sequencing

Use Scenario: Output stage of opto-isolated solid-state relays replacing electromechanical contacts.

IC Role / Device Role / Timing Role: Isolated AC load switch with galvanic separation between control and power domains.

Use Value: I_TSM = 8.5 A (8.3 ms) supports brief inrush currents during lamp or transformer energization.

Use Scenario: Controlled AC power enable/disable for heating elements or solenoids in washing machines or coffee makers.

IC Role / Device Role / Timing Role: Safety-critical on/off switch activated only after system self-test completion.

Use Value: IH ≤ 7 mA ensures positive turn-off even under low-load conditions, preventing unintended hold-on.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BT134-500D	V_DRM = 500 V; I_GT = 5 mA; TO-92 package	Higher voltage rating but higher gate drive requirement and through-hole mounting	Select when >400 V blocking is needed and board space permits leaded package
Z0107MN	V_DRM = 600 V; I_GT ≤ 5 mA; same SOT-223 package	Higher voltage capability with identical footprint and thermal profile	Select when upgrading blocking margin while retaining layout and thermal design

Compared with BT134-500D and Z0107MN, Z0103DA 1AA2 offers the lowest gate trigger current (≤3 mA) in SOT-223, enabling direct drive from low-power MCUs without buffer stages-critical for space-constrained, battery-aware designs.

Availability

Z0103DA 1AA2 is available at Aetrix Electronics and suitable for light dimming control, fan speed regulation, SSR output stages, and appliance power sequencing requiring stable component supply and long-term industrial availability.

Supply support for Z0103DA 1AA2 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The Z01xxxN series was developed specifically for high-volume, cost-sensitive AC control applications requiring surface-mount compatibility, low gate drive, and robust thermal performance in compact packages.

FAQ

What is the maximum allowable junction temperature for Z0103DA 1AA2?

The absolute maximum junction temperature is +125 °C per the electrical characteristics table. Operation above this limit risks irreversible degradation of the TOP GLASS PNPN structure and loss of dV/dt immunity. Derating curves in Figure 3 confirm 1 A RMS current is sustainable only if tab temperature remains ≤90 °C.

Can Z0103DA 1AA2 be driven directly by a 3.3 V microcontroller GPIO?

Yes - with appropriate current-limiting. At V_DD = 3.3 V and assuming V_GT ≤ 1.5 V, a 560 Ω series resistor delivers ~3.2 mA into the gate, satisfying the I_GT ≤ 3 mA requirement. Verified gate threshold data confirms reliable triggering at 25 °C and up to 110 °C.

Is the exposed tab on the SOT-223 package electrically isolated?

No - the exposed tab is internally connected to terminal A2 (MT2). This must be considered during PCB layout: if A2 connects to live AC, the tab must be isolated from chassis ground or other low-voltage circuits using insulating thermal pads or cutouts per safety standards (IEC 60335, UL 60730).

Does Z0103DA 1AA2 support zero-crossing switching?

No - it is a standard sensitive-gate triac without integrated zero-crossing detection. Zero-crossing operation requires external circuitry (e.g., optocoupler + comparator) to synchronize gate pulses with AC voltage zero crossings. The 2 µs typical trigger delay (t_gt) supports accurate timing when used with such external timing control.

Z0103DA 1AA2 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bulk

Product Status:: Obsolete

Triac Type:: Logic - Sensitive Gate

Voltage - Off State:: 400 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):: 3 mA

Current - Hold (Ih) (Max):: 7 mA

Configuration:: Single

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

Z0103DA 1AA2 FAQ

1.How can I place an order for Z0103DA 1AA2 through Aetrix?

Please submit a Request for Quotation (RFQ) for Z0103DA 1AA2 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 Z0103DA 1AA2 reliable?

The price and inventory of Z0103DA 1AA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0103DA 1AA2 is usually 5 days.

3.What payment methods are accepted for Z0103DA 1AA2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0103DA 1AA2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for Z0103DA 1AA2?

Z0103DA 1AA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your Z0103DA 1AA2 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 Z0103DA 1AA2?

For technical support, including Z0103DA 1AA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0103DA 1AA2 requirements.

6.How does Aetrix verify that Z0103DA 1AA2 is sourced from the original manufacturer or authorized distributors?

All Z0103DA 1AA2 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 Z0103DA 1AA2 meets industry standards.

7.What is the process for return or replacement of Z0103DA 1AA2?

All Z0103DA 1AA2 units undergo pre-shipment inspection (PSI). If there is an issue with Z0103DA 1AA2, 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 Z0103DA 1AA2 part is unused and in its original packaging.

Return procedure for Z0103DA 1AA2:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…