STMicroelectronics ITA6V1U1RL

Overview

ITA6V1U1RL 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 lines interfacing microcontrollers and line drivers.

For engineers reviewing the ITA6V1U1RL datasheet, ITA6V1U1RL pinout, ITA6V1U1RL application, or ITA6V1U1RL equivalent, key selection criteria include clamping performance at 10 A, leakage current ≤1 µA at 6.1 V, SO-8 thermal derating to 125 °C junction temperature, and compatibility with IEC 61000-4-2 Level 4 (15 kV air/8 kV contact discharge) and MIL-STD-883G Class 3B (25 kV HBM) compliance requirements.

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 optimized for sub-10 ns response to ESD transients. It delivers precise voltage limiting without parasitic turn-on during normal operation due to its 6.51 V minimum breakdown threshold and low 10 V clamping at 10 A.

The array supports bidirectional protection schemes when paired across differential pairs, though the ITA6V1U1RL itself is unidirectional per channel. Its 1.5 nF capacitance at 0 V bias (1 MHz) and <1 µA leakage at 6.1 V enable use on high-speed, low-voltage interfaces without signal integrity degradation.

Key Specifications

Pinout & Package

ITA6V1U1RL is housed in a standard SO-8 package (JEDEC MS-012AC) with 1.27 mm pitch, 5.0 mm width, and 6.2 mm length, compliant with UL94 V0 epoxy and RoHS/ECOPACK® lead-free interconnect standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional multi-channel ESD protection applications.

Compared with ESDA6V1-MLP and TPD6E05U06DQAR, ITA6V1U1RL uniquely balances 40 A surge robustness, 6-channel integration, and 1.5 nF capacitance - making it optimal for industrial serial interfaces requiring both IEC 61000-4-2 and IEC 61000-4-5 compliance in a single SO-8 device.

Availability

ITA6V1U1RL is available at Aetrix Electronics and suitable for industrial RS-232 ports, USB 1.1 peripheral interfaces, and SPI flash memory protection requiring stable component supply across multi-year production cycles and revision-controlled BOMs.

Supply support for ITA6V1U1RL 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, MCU, power, and protection devices for industrial, automotive, and consumer markets.

The ITAxxU1 series was engineered specifically for high-reliability, multi-line data port protection - combining Transil avalanche clamping with SO-8 thermal efficiency to replace discrete diode arrays in space- and cost-sensitive designs.

FAQ

What is the maximum continuous reverse voltage (VRM) rating for ITA6V1U1RL?

The ITA6V1U1RL has a stand-off voltage (VRM) of 6.1 V, defined as the maximum DC or RMS voltage that can be continuously applied without triggering conduction. This value is derived from the 6.51 V minimum breakdown voltage with margin, ensuring stable operation up to 6.1 V under all temperature conditions per ST's characterization data.

Can ITA6V1U1RL protect bidirectional signals like RS-485 without external components?

No - ITA6V1U1RL is unidirectional per channel and clamps only positive transients to ground. For true bidirectional protection (e.g., RS-485), two devices must be used back-to-back or a dedicated bidirectional array like ITA6V1B1RL is required to handle both polarities symmetrically.

How does the SO-8 package affect thermal performance during repeated 40 A surges?

Under repetitive 40 A (8/20 µs) pulses, the SO-8 package limits safe duty cycle to ≤0.1% due to thermal resistance (RθJA ≈ 120 °C/W). Derating is required above 25 °C ambient; ST specifies 125 °C max junction temperature, meaning ≥100 ms between pulses is needed for sustained operation without cumulative heating.

Is ITA6V1U1RL compatible with lead-free reflow profiles per JEDEC J-STD-020?

Yes - ITA6V1U1RL is qualified for lead-free reflow with a peak temperature of 260 °C for 10 seconds, matching JEDEC J-STD-020D requirements. Its ECOPACK® construction uses matte tin plating and lead-free solderability is verified per J-STD-002 and J-STD-003 standards.