onsemi ESDM3031MXT5G

Overview

ESDM3031MXT5G from onsemi is a bidirectional ESD protection diode designed for low-capacitance, high-speed signal line protection in space-constrained applications. It features a 3.3 V stand-off voltage, 6.3 V clamping voltage at 5 A, 20 pF junction capacitance at 0 V, IEC 61000-4-2 Level 4 compliance (±30 kV contact/air), and a compact X3DFN2 package (0.62 mm × 0.32 mm × 0.3 mm).

For engineers reviewing the ESDM3031MXT5G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 8/20 µs transients, RF insertion loss below –2 dB up to 1 GHz, low leakage (<0.1 µA), dynamic resistance of 0.13 Ω, and compatibility with SD card, audio line, and GPIO interface layouts.

Technical Context

The ESDM3031MXT5G employs a silicon avalanche diode structure optimized for fast response (<1 ns) and symmetric bidirectional clamping. Its low dynamic resistance (0.13 Ω) ensures minimal voltage overshoot during IEC 61000-4-2 ±8 kV contact discharge events, while its 20 pF capacitance at 1 MHz enables use on high-speed lines without signal integrity degradation.

It operates within a junction temperature range of −55 °C to +150 °C and sustains peak pulse currents up to 11 A (8/20 µs) and 16 A (TLP). The device meets IEC 61000-4-2 Level 4 and ANSI/ESD STM5.5.1 TLP testing standards, with verified clamping voltages of 7.2 V (TLP @ 16 A) and 8.0 V (10 A, 8/20 µs).

Key Specifications

Pinout & Package

ESDM3031MXT5G is housed in the X3DFN2 package (Case 152AF), measuring 0.62 mm × 0.32 mm × 0.3 mm with a 0.35 mm pitch. It is a 2-terminal, bidirectional device with no polarity marking required.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and SP1001-01UTG, ESDM3031MXT5G uniquely balances 3.3 V rail compatibility, bidirectional symmetry, and sub-7 V clamping-making it optimal for modern mixed-signal interfaces where signal polarity and voltage headroom are constrained.

Availability

ESDM3031MXT5G is available at Aetrix Electronics and suitable for SD card interface protection, smartphone audio line protection, and industrial GPIO protection requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for ESDM3031MXT5G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The ESDM3031MXT5G belongs to onsemi's Micro-Packaged ESD Protection Diode family, engineered specifically for board-level I/O protection in high-density portable electronics where capacitance, size, and clamping precision are critical.

FAQ

What is the maximum operating temperature range for the ESDM3031MXT5G?

The ESDM3031MXT5G has a specified junction and storage temperature range of −55 °C to +150 °C. This wide thermal envelope allows reliable operation in automotive under-hood modules, industrial motor drives, and outdoor IoT gateways. The device maintains its 3.3 V stand-off and 6.3 V clamping performance across this full range, as validated in onsemi's thermal characterization reports for the X3DFN2 package.

Does the ESDM3031MXT5G require a ground connection to function?

No, the ESDM3031MXT5G does not require a dedicated ground pin. As a two-terminal bidirectional device, it functions as a shunt protector between the protected signal line and either a local ground plane or a power rail (e.g., VDDIO). Its symmetrical I-V curve enables clamping in both directions without external bias, making it ideal for floating or AC-coupled traces like audio lines or USB differential pairs.

How does the 20 pF junction capacitance of the ESDM3031MXT5G affect USB 2.0 signal integrity?

The ESDM3031MXT5G's 20 pF capacitance at 0 V and 1 MHz introduces less than 0.1 dB insertion loss at 480 MHz, well within USB 2.0 full-speed and high-speed eye diagram specifications. Measured RF insertion loss data (Figure 10 in the datasheet) confirms <−2 dB attenuation up to 1 GHz, ensuring minimal impact on rise time, jitter, and signal amplitude-critical for maintaining USB 2.0 compliance in compact portable designs.

Can the ESDM3031MXT5G be used to protect 5 V logic interfaces?

The ESDM3031MXT5G is rated for a 3.3 V working peak reverse voltage and is not recommended for direct protection of 5 V logic interfaces. Its breakdown voltage starts at 4.4 V (min), and clamping begins near 6.3 V-insufficient to prevent damage to 5 V-tolerant I/O cells during sustained overvoltage. For 5 V applications, onsemi recommends alternatives such as the ESDM3051MXT5G (5.0 V stand-off) or SP1001-01UTG.

What is the mechanical package outline and footprint compatibility of the ESDM3031MXT5G?

The ESDM3031MXT5G uses the X3DFN2 package (Case 152AF), with exact dimensions of 0.62 mm × 0.32 mm × 0.3 mm and a 0.35 mm terminal pitch. Its footprint matches JEDEC-standard 0201-sized passive components, enabling placement in tight spaces near connectors or BGA escape routes. The package has no exposed pad and requires standard reflow soldering per IPC-J-STD-020 MSL1 guidelines.