onsemi ESDR0502NMUTAG

Overview

ESDR0502NMUTAG from onsemi is a unidirectional ESD protection diode array in UDFN6 package, designed for high-speed data line protection with 0.3 pF typical capacitance between I/O and GND, 5.5 V reverse working voltage, and 8 kV IEC 61000−4−2 contact ESD rating - deployed in USB 2.0 interface protection.

For engineers reviewing the ESDR0502NMUTAG datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low capacitance for signal integrity, clamping voltage under 12 V at 3 A, unidirectional configuration for VBUS+D+/D− protection, and UDFN6 footprint compatibility with space-constrained USB port layouts.

Technical Context

The ESDR0502NMUTAG integrates four unidirectional ESD protection diodes in a single UDFN6 package: one for VBUS (pin 1), two for D+ and D− (pins 4 and 5), and one common GND (pin 6). It operates with a 5.5 V VRWM and 6.0 V minimum breakdown voltage at 1 mA, enabling robust protection of 5 V USB power and data lines without forward conduction during normal operation.

Clamping behavior is defined per IEC 61000−4−2 Level 4 (±8 kV contact), delivering sub-12 V clamping voltage at 3.0 A peak pulse current. Its 0.3–0.6 pF junction capacitance (measured at 0 V, 1 MHz) ensures minimal signal distortion on 480 Mbps USB 2.0 differential pairs.

Key Specifications

Pinout & Package

ESDR0502NMUTAG uses a 6-pin UDFN6 package (Case 517AA), with exposed thermal pad connected internally to GND. Pin 1 = VBUS, Pins 4 & 5 = D+ and D−, Pin 6 = GND; Pins 2 & 3 are NC (no connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and SP1001-01WTG, the ESDR0502NMUTAG delivers optimal balance of ultra-low capacitance, integrated 4-line protection, and minimal UDFN6 footprint - making it the preferred choice for space-constrained, high-speed USB 2.0 designs requiring single-device implementation.

Availability

ESDR0502NMUTAG is available at Aetrix Electronics and suitable for USB 2.0 interface protection, flat-panel display port hardening, and portable audio device data line safeguarding requiring stable component supply across production lifecycles.

Supply support for ESDR0502NMUTAG 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.

The ESDR0502NMUTAG belongs to onsemi's ESD protection diode array product line, engineered specifically for high-speed serial interface protection where signal fidelity and board space are critical constraints.

FAQ

What is the primary circuit role of the ESDR0502NMUTAG in a USB 2.0 design?

The ESDR0502NMUTAG serves as a unidirectional ESD protection array that safeguards the VBUS, D+, D−, and GND lines of a USB 2.0 port. It routes transient currents from ±8 kV ESD events directly to ground via low-inductance paths, clamping voltages to under 12 V while maintaining 0.3 pF capacitance to preserve 480 Mbps signal integrity. The ESDR0502NMUTAG is placed adjacent to the USB connector with minimal trace length to maximize protection efficacy.

Does the ESDR0502NMUTAG support bidirectional signal lines like USB D+ and D−?

Yes - the ESDR0502NMUTAG uses unidirectional diodes configured with anodes tied to each protected line (D+, D−, VBUS) and cathodes connected to GND. This architecture allows normal bidirectional data flow on D+/D− during USB operation while providing asymmetric clamping: positive transients are shunted to GND, and negative transients are blocked by reverse bias until breakdown occurs. The ESDR0502NMUTAG thus maintains signal functionality without DC loading.

What is the maximum clamping voltage specification for the ESDR0502NMUTAG under IEC 61000−4−2 testing?

The ESDR0502NMUTAG exhibits a clamping voltage below 12 V when subjected to the IEC 61000−4−2 8 kV contact discharge waveform at 3.0 A peak pulse current. This value is measured across the device terminals during the full ESD pulse event and confirmed via oscilloscope waveform capture (Figures 1 and 2 in the datasheet). The ESDR0502NMUTAG's clamping performance ensures downstream USB transceivers remain within safe operating voltage limits.

Can the ESDR0502NMUTAG be used for Gigabit Ethernet PHY protection despite being specified for USB 2.0?

Yes - the ESDR0502NMUTAG is suitable for Gigabit Ethernet PHY protection due to its 0.3 pF capacitance, 5.5 V VRWM, and ±8 kV ESD rating. When placed after Ethernet magnetics and common-mode chokes, it suppresses residual fast transients on differential pairs without distorting 125 MHz symbol rates. The ESDR0502NMUTAG's unidirectional configuration avoids interference with PHY biasing, and its UDFN6 footprint allows dense placement near RJ45 magnetics modules.

Is the thermal pad on the ESDR0502NMUTAG package electrically connected, and how should it be handled in layout?

Yes - the exposed thermal pad on the bottom of the ESDR0502NMUTAG's UDFN6 package is internally connected to Pin 6 (GND). It must be soldered to a dedicated PCB GND plane using a thermally and electrically optimized pad pattern (e.g., 9×9 array of 0.25 mm vias to inner ground layers). This connection reduces thermal resistance, improves ESD current dissipation, and enhances high-frequency grounding - all critical for consistent clamping performance. The ESDR0502NMUTAG's reliability depends on proper thermal pad implementation.