STMicroelectronics ESDA6V1-4BC6

Overview

ESDA6V1-4BC6 from STMicroelectronics is a quad bidirectional Transil™ TVS array in SOT23-6L package, designed for board-level ESD protection of four symmetrical signal lines. It features 6.1 V standoff voltage, 80 W peak pulse power (8/20 µs), 15 kV air/8 kV contact ESD immunity per IEC61000-4-2 Level 4, 1 µA max leakage at 5 V, and 45 pF typical capacitance - ideal for high-density USB, HDMI, or audio interface protection.

For engineers reviewing the ESDA6V1-4BC6 datasheet, ESDA6V1-4BC6 pinout, ESDA6V1-4BC6 application, or ESDA6V1-4BC6 equivalent, key selection criteria include clamping voltage (≤3 V @ 3 A), channel separation (80 dB @ 20 kHz), low capacitance for signal integrity, thermal derating above 25°C, and SOT23-6L footprint compatibility with tight-layout designs.

Technical Context

The ESDA6V1-4BC6 integrates four independent bidirectional TVS diodes in a single monolithic silicon array, each configured as a back-to-back Zener pair to clamp both positive and negative transients without polarity dependence. Its 6.1 V breakdown voltage ensures reliable operation below 5 V system rails while maintaining fast response (<1 ns) to ESD events.

It operates across –40°C to +125°C, with junction temperature-dependent derating of peak pulse power (e.g., ~70% at 100°C), and exhibits 0.45 Ω dynamic resistance enabling low clamping voltage under 3 A transient current. Channel isolation exceeds 80 dB at 20 kHz, minimizing crosstalk between protected lines.

Key Specifications

Pinout & Package

SOT23-6L package: 1.6 mm × 2.9 mm × 1.1 mm body, 0.95 mm pitch, gull-wing leads, JEDEC MO-178AC compliant. Low-profile design enables placement near connectors on space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with TPD4E001DRYR and ESD5V3U4-2SC6, the ESDA6V1-4BC6 delivers superior peak power handling (80 W) and proven IEC61000-4-2 Level 4 compliance at lower cost, making it optimal for industrial and consumer interfaces where robustness and footprint efficiency outweigh ultra-low capacitance needs.

Availability

ESDA6V1-4BC6 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI control line safeguarding, and industrial RS-485 transceiver hardening requiring stable component supply across production lifecycles.

Supply support for ESDA6V1-4BC6 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, specializing in automotive, industrial, and power management solutions with over 40 years of analog protection IP development.

The ESDA6V1-4BC6 belongs to ST's Transil™ TVS array product line, engineered specifically for board-level ESD hardening of high-speed digital and analog interfaces in space-constrained environments.

FAQ

What is the maximum operating temperature for ESDA6V1-4BC6?

The ESDA6V1-4BC6 supports continuous operation from –40°C to +125°C ambient, with junction temperature limited to 150°C. Derating of peak pulse power begins above 25°C junction temperature, dropping to ~50% at 125°C per Figure 2 in the datasheet.

Can ESDA6V1-4BC6 protect both power (VCC) and signal lines?

Yes - its bidirectional architecture and 5 V standoff voltage allow use on 3.3 V or 5 V signal lines (e.g., USB D+/D–) and VCC bus lines up to 5 V. However, for VCC protection, ensure IPP rating (3 A max per channel) aligns with expected surge current; external fusing may be needed for sustained overvoltage.

How does channel separation affect performance in multi-line applications?

With 80 dB typical isolation at 20 kHz, the ESDA6V1-4BC6 minimizes capacitive coupling between adjacent protected lines. This prevents ESD energy injected on one line from coupling into another - critical for differential pairs (e.g., HDMI TMDS) where skew or common-mode noise could disrupt eye diagrams.

Is SOT23-6L footprint compatible with automated optical inspection (AOI)?

Yes - the SOT23-6L package has standardized gull-wing leads with 0.95 mm pitch and defined solder joint geometry (per JEDEC MO-178AC), enabling reliable AOI detection of bridging, tombstoning, and insufficient solder. ST provides recommended stencil aperture and reflow profiles in AN2729.