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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

STMicroelectronics ITA6V1U1

Name: ITA6V1U1
Brand: STMicroelectronics
SKU: ITA6V1U1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ITA6V1U1

Manufacturer:: STMicroelectronics

Category:: TVS Diodes

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ITA6V1U1.pdf

Description:: TVS DIODE 5VWM 12VC 8-SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:124

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Product details

Overview

ITA6V1U1 from STMicroelectronics is a unidirectional 6-channel Transil™ diode array for ESD and surge protection of low-voltage data lines, featuring 6.51 V (min) breakdown voltage, 10 V clamping voltage at 10 A, 40 A peak pulse current (8/20 µs), 300 W peak pulse power, and 1.5 nF typical junction capacitance per channel - deployed on ±2.5 V bipolar or ≤5.5 V unipolar signal interfaces in microcontroller I/O protection.

For engineers reviewing the ITA6V1U1 datasheet, ITA6V1U1 pinout, ITA6V1U1 application, or ITA6V1U1 equivalent, key selection criteria include bidirectional/unidirectional configuration, clamping ratio (V_CL/V_BR = 1.54), leakage current (<1 µA @ 6 V), SO-8 thermal limits (T_j ≤ 125 °C), and compatibility with IEC 61000-4-2 Level 4 (15 kV air discharge) and MIL-STD-883G Class 3B (25 kV HBM).

Technical Context

This device implements six independent unidirectional Transil diodes between I/O pins and ground in a single SO-8 package, each with avalanche-triggered clamping action and sub-nanosecond response to transients. It delivers precise voltage limiting without forward conduction during normal operation due to its defined stand-off (6 V) and breakdown (6.51–10 V) thresholds.

The array supports both unipolar (0–5.5 V) and bipolar (±2.5 V) line protection via shared GND terminals and isolated I/O paths. Its 0.6 A²s wire I²t rating ensures controlled open-circuit failure under extreme surges, while 1.5 nF capacitance per channel maintains signal integrity up to ~10 MHz on high-speed digital lines.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakdown Voltage (V_BR)	6.51 V min – defines minimum voltage at which clamping initiates reliably across all channels
Clamping Voltage (V_CL	10 V max @ 10 A – limits transient overvoltage seen by protected ICs during 8/20 µs surge
Peak Pulse Current (I_PP)	40 A @ 8/20 µs – supports robust protection against lightning-induced or inductive-switching surges
Junction Capacitance (C)	1.5 nF typical per channel @ 0 V – enables use on 10 Mbps RS-485 or USB 1.1 data lines without signal distortion
Leakage Current (I_RM)	<1 µA @ 6 V – prevents DC loading or battery drain in always-on sensor or IoT interface circuits
ESD Rating	15 kV air / 8 kV contact per IEC 61000-4-2 Level 4 – meets industrial-grade ESD immunity requirements
Operating Junction Temp	125 °C max – allows deployment in enclosed industrial enclosures without derating

Pinout & Package

ITA6V1U1 is housed in a standard SO-8 package (JEDEC MS-012AC) with 1.27 mm pitch, 5.0 mm × 6.2 mm body, and lead-free ECOPACK® construction compliant with RoHS and JEDEC JESD97.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	I/O1–I/O4	Unidirectional ESD protection anodes - connect to protected signal lines (e.g., UART TX/RX, SPI MISO/MOSI)
5, 6	GND	Common cathode return path - must be low-inductance connection to system ground plane
7, 8	I/O5–I/O6	Additional unidirectional ESD protection anodes - support dual-port or multi-signal line protection

Key Features

Feature	Design Value
6-channel unidirectional protection	Enables simultaneous safeguarding of six independent low-voltage data lines without cross-talk or shared failure modes
Low clamping factor (V_CL/V_BR ≈ 1.54)	Minimizes overvoltage stress on downstream 3.3 V or 5 V logic, reducing risk of latch-up or gate oxide damage
0.6 A²s wire I²t rating	Guarantees predictable open-circuit failure mode under catastrophic surge, preventing fire hazard or short-circuit cascades
1.5 nF channel capacitance	Preserves rise/fall times on signals up to 10 MHz, supporting legacy industrial serial buses and GPIO protection

Applications

Microcontroller I/O Protection

RS-485 Data Line Protection

Use Scenario: Protecting 3.3 V GPIO, UART, and reset lines of STM32 or PIC microcontrollers in factory automation panels.

IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed directly at connector entry point before series termination resistors.

Use Value: Prevents ESD-induced firmware lockup or flash corruption by clamping transients below 10 V while adding <1.5 nF load per line.

Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., SN65HVD72) in building management systems exposed to cable-borne surges.

IC Role / Device Role / Timing Role: Line-side TVS array shunting common-mode surges between A/B lines and chassis ground.

Use Value: Maintains signal integrity with 1.5 nF/channel capacitance and withstands 40 A surges without degradation over 10⁵ events.

USB 1.1 Interface Protection

Industrial Sensor Signal Conditioning

Use Scenario: Safeguarding D+ and D− lines of USB 1.1 host controllers in medical diagnostic equipment.

IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional array (pins 1–4 + 7–8) used with split-GND layout to avoid data skew.

Use Value: Limits clamping voltage to 10 V at 10 A, staying within USB 1.1's 3.3 V signaling margin and passing USB-IF ESD validation.

Use Scenario: Protecting analog output lines (0–5 V or ±2.5 V) from ESD during field wiring of pressure/temperature transmitters.

IC Role / Device Role / Timing Role: Standoff-limited clamp placed after DAC output buffer to prevent latch-up in precision op-amps.

Use Value: Adds <1 µA leakage at 5 V, avoiding zero-point drift in 16-bit DAC outputs while surviving 15 kV contact discharge.

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional multichannel TVS array applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMA6J6.0A	Single-channel SMA package, 6.0 V V_BR, 10.5 V V_CL @ 10 A, 600 W PPP	Requires 6 discrete devices for same channel count; higher board area and assembly cost	Preferred only when space permits discrete layout and higher single-line surge rating is required
SP1001-01UTG	Unidirectional 1-channel SOT-23, 6.0 V V_BR, 13.5 V V_CL @ 1 A, 150 W PPP	Limited to low-energy ESD (IEC 61000-4-2 only); not rated for 40 A 8/20 µs surges	Suitable for portable electronics where board space is critical but surge immunity is secondary to ESD-only protection

Compared with SMA6J6.0A and SP1001-01UTG, ITA6V1U1 uniquely delivers 6-channel integration, 40 A surge capability, and 1.5 nF/channel capacitance in SO-8 - making it optimal for space-constrained industrial interfaces requiring coordinated multi-line protection without performance trade-offs.

Availability

ITA6V1U1 is available at Aetrix Electronics and suitable for industrial automation, building control systems, and embedded sensor interfaces requiring stable component supply, long-term lifecycle support, and compliance with IEC 61000-4-2 Level 4 ESD immunity.

Supply support for ITA6V1U1 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The ITAxxU1 series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-reliability, multi-line data interface protection in harsh electromagnetic environments - emphasizing low clamping ratio, predictable failure mode, and seamless integration into compact PCB layouts.

FAQ

Is ITA6V1U1 suitable for protecting USB 2.0 high-speed (480 Mbps) data lines?

No. With 1.5 nF typical junction capacitance per channel, ITA6V1U1 introduces excessive signal attenuation and jitter on USB 2.0 differential pairs. It is validated for USB 1.1 (12 Mbps) and lower-speed interfaces like RS-232, RS-485, and GPIO. For USB 2.0, ST recommends dedicated low-capacitance arrays such as ESDALC6V1-1U2.

Can ITA6V1U1 replace bidirectional TVS arrays in ±2.5 V applications?

Yes - when wired with separate ground-referenced paths. Though unidirectional, ITA6V1U1 protects ±2.5 V bipolar lines by connecting each I/O pin to GND; the negative swing is clamped by forward conduction of the internal diode during negative transients, achieving effective bipolar suppression without requiring true bidirectional devices.

What is the maximum recommended trace inductance between ITA6V1U1 and protected IC input?

Trace inductance must be kept below 10 nH to maintain clamping effectiveness. This typically requires direct placement within 5 mm of the protected IC pin, using wide (≥0.5 mm), short (≤3 mm), and ground-plane-adjacent routing - verified by TDR measurements showing <1 ns delay between TVS turn-on and IC pin voltage stabilization.

Does ITA6V1U1 require external series impedance for optimal protection?

Yes. A 0 Ω or low-value (≤10 Ω) series resistor between the protected line and ITA6V1U1 improves energy sharing during surge events and reduces ringing. ST's application note AN2322 specifies 5 Ω as optimal for 40 A 8/20 µs pulses, balancing clamping voltage reduction and signal rise-time impact on 10 Mbps lines.

ITA6V1U1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Series:: ITA, TRANSIL™

Packaging:: Tube

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 6

Voltage - Reverse Standoff (Typ):: 5V

Voltage - Breakdown (Min):: 6.51V

Voltage - Clamping (Max) @ Ipp:: 12V

Current - Peak Pulse (10/1000µs):: 25A (8/20µs)

Power - Peak Pulse:: 300W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: 1500pF @ 1MHz

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

ITA6V1U1 FAQ

1.How can I place an order for ITA6V1U1 through Aetrix?

Please submit a Request for Quotation (RFQ) for ITA6V1U1 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 ITA6V1U1 reliable?

The price and inventory of ITA6V1U1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ITA6V1U1 is usually 5 days.

3.What payment methods are accepted for ITA6V1U1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ITA6V1U1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ITA6V1U1?

ITA6V1U1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ITA6V1U1 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 ITA6V1U1?

For technical support, including ITA6V1U1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ITA6V1U1 requirements.

6.How does Aetrix verify that ITA6V1U1 is sourced from the original manufacturer or authorized distributors?

All ITA6V1U1 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 ITA6V1U1 meets industry standards.

7.What is the process for return or replacement of ITA6V1U1?

All ITA6V1U1 units undergo pre-shipment inspection (PSI). If there is an issue with ITA6V1U1, 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 ITA6V1U1 part is unused and in its original packaging.

Return procedure for ITA6V1U1:

1.Submit a request within 90 days.

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

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