Diodes Incorporated DESD12VS2UTQ-7

Overview

DESD12VS2UTQ-7 from Diodes Incorporated is a 2-channel unidirectional TVS diode designed for ESD protection of high-speed data lines. It features a 12 V reverse standoff voltage, 14.7–17.1 V breakdown range, 24 V clamping voltage at 6 A peak pulse current, and 50 pF typical channel capacitance. It is AEC-Q101 qualified and used in automotive infotainment USB/HDMI interfaces.

For engineers reviewing the DESD12VS2UTQ-7 datasheet, DESD12VS2UTQ-7 pinout, DESD12VS2UTQ-7 application, or DESD12VS2UTQ-7 equivalent, key selection criteria include IEC 61000-4-2 ±30 kV contact/air ESD rating, low 50 pF capacitance for signal integrity, SOT23 package footprint compatibility, and AEC-Q101 qualification for automotive deployment.

Technical Context

This device implements two independent unidirectional TVS junctions in a single SOT23-3 package, each protecting one signal line against transient overvoltage. Its low 50 pF input capacitance minimizes signal distortion on high-speed interfaces such as USB 2.0 and HDMI DDC lines.

The diode operates with a 12 V standoff and clamps to ≤24 V at 6 A (8/20 µs), delivering 130 W peak pulse power. It meets IEC 61000-4-2 Level 4 (±30 kV air/contact) and is rated for operation from –55 °C to +150 °C.

Key Specifications

Pinout & Package

Package: SOT23-3, surface-mount, lead-free, halogen-free, RoHS-compliant plastic package with matte tin-plated copper leadframe. Moisture sensitivity level 1 (J-STD-020).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TVS diode applications.

Compared with SMAJ12A and SP1003-010, DESD12VS2UTQ-7 uniquely combines dual-channel unidirectional protection, 50 pF capacitance, ±30 kV ESD rating, and AEC-Q101 qualification-making it the only option validated for production automotive USB/HDMI interfaces requiring signal fidelity and functional safety compliance.

Availability

DESD12VS2UTQ-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, USB 2.0 peripheral modules, and HDMI display interfaces requiring stable component supply across multi-year production cycles.

Supply support for DESD12VS2UTQ-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DESDxxVS2UTQ series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically to meet stringent ESD robustness, thermal stability, and qualification requirements for modern vehicle connectivity subsystems.

FAQ

What is the maximum clamping voltage of DESD12VS2UTQ-7 under IEC 61000-4-2 ESD stress?

The device does not clamp during IEC 61000-4-2 testing itself; its specified clamping voltage is 24 V at 6 A (8/20 µs waveform). This value reflects worst-case transient suppression performance under standardized surge conditions-not ESD pulse response. The ±30 kV ESD rating is verified separately per test standard.

Can DESD12VS2UTQ-7 protect bidirectional data lines like I²C?

Yes-it can protect bidirectional lines such as I²C DDC when used with proper grounding. Its unidirectional architecture requires the protected line to remain positive relative to ground during normal operation. For true bidirectional signal paths with voltage swings below ground, a bi-directional TVS (e.g., DESD12VD2UTQ-7) is required.

Is the SOT23-3 footprint compatible with standard automated pick-and-place equipment?

Yes-the SOT23-3 package uses industry-standard dimensions (2.9 mm × 1.3 mm × 1.0 mm) and is fully compatible with Class II and III placement machines. The matte tin finish ensures reliable solderability using standard reflow profiles (J-STD-020 Level 1), and the 0.95 mm pitch supports fine-pitch assembly.

Does DESD12VS2UTQ-7 require derating at elevated ambient temperatures?

Yes-its 250 mW power dissipation is rated at 25 °C ambient and must be linearly derated above that point. At 100 °C ambient, maximum power drops to ~75 mW (per Figure 1 derating curve). System-level thermal design must ensure junction temperature stays ≤150 °C under combined DC leakage and transient surge conditions.