STMicroelectronics ITA6V5B1RL

Overview

ITA6V5B1RL from STMicroelectronics is a bidirectional Transil™ diode array for differential data line ESD and surge protection, featuring 6.5 V standoff voltage (VRM), 10 V breakdown (VBR @ 1 mA), 12 V clamping at 40 A (VCL @ IPP), 750 pF capacitance, and SO-8 package. It delivers 300 W peak pulse power (8/20 µs) and supports RS-232/RS-422/RS-485 interface protection with ±3.5 V max differential voltage between I/O pins.

For engineers reviewing the ITA6V5B1RL datasheet, ITA6V5B1RL pinout, ITA6V5B1RL application, or ITA6V5B1RL equivalent, key selection criteria include clamping performance under 40 A transients, low-leakage operation (<5 µA at VRM), junction capacitance impact on signal integrity, and compatibility with bidirectional differential bus topologies requiring robust IEC 61000-4-2 Level 4 (15 kV air) compliance.

Technical Context

This monolithic array integrates six unidirectional Transil diodes with a common cathode, configured to provide up to five independent bidirectional protection channels between I/O pins and ground. Each channel clamps transients via avalanche breakdown with sub-nanosecond response, maintaining low leakage (<5 µA) at 6.5 V standoff while delivering 12 V clamping at 40 A.

The device operates within –55 °C to +150 °C storage range and 125 °C max junction temperature, with SO-8 footprint optimized for PCB space efficiency in serial interface layouts. Its 750 pF capacitance (measured at 1 MHz, VR = VRM) is specified per I/O-to-ground path, enabling use on moderate-speed lines without excessive signal distortion.

Key Specifications

Pinout & Package

ITA6V5B1RL is housed in a standard SO-8 surface-mount package (JEDEC MS-012AC), with 1.27 mm pitch, 4.9 mm body width, and RoHS-compliant lead-free terminations per ECOPACK® specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional data-line protection applications.

Compared with SMAJ6.5A and SP3012-01UTG, ITA6V5B1RL uniquely integrates five bidirectional channels in SO-8 with balanced clamping and controlled 750 pF loading-making it optimal for space-constrained, multi-line industrial serial designs requiring IEC 61000-4-2 Level 4 compliance.

Availability

ITA6V5B1RL is available at Aetrix Electronics and suitable for RS-232 interface protection, RS-422 differential line protection, and RS-485 bus node protection requiring stable component supply across industrial OEM production cycles.

Supply support for ITA6V5B1RL 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The ITAxxB1 series targets robust, monolithic transient protection for legacy and modern differential serial interfaces-emphasizing high surge survivability, low clamping, and compact integration for space-limited industrial PCBs.

FAQ

What is the maximum differential voltage rating between two I/O pins for ITA6V5B1RL?

The maximum differential voltage between any two I/O pins (e.g., Pin 1 and Pin 2) is ±3.5 V at 25 °C, as specified in Table 3 of the datasheet. Exceeding this voltage risks forward-biasing internal diode junctions and degrading clamping performance or causing permanent damage.

Can ITA6V5B1RL be used on 3.3 V logic interfaces without risk of false triggering?

Yes. With a 6.5 V standoff voltage (VRM) and 10 V minimum breakdown (VBR), ITA6V5B1RL remains fully non-conductive during normal 3.3 V operation-even with typical 10% supply tolerance-ensuring zero interference with signal integrity or DC bias conditions.

How does the SO-8 package's dual GND pins (Pins 5–6 and 7–8) improve surge handling?

The four dedicated GND terminals lower total package inductance and distribute surge current across parallel bond wires, reducing localized heating and delaying wire fusing during repetitive 40 A transients-extending device lifetime beyond single-event ratings defined in I²t = 0.6 A²s.

Is ITA6V5B1RL compliant with lead-free soldering standards?

Yes. ITA6V5B1RL uses an ECOPACK®-compliant SO-8 package with lead-free second-level interconnects, qualified for reflow profiles up to 260 °C peak (10 s at 5 mm from case), and meets JEDEC JESD97 marking requirements for RoHS and halogen-free compliance.