onsemi NUP5120X6T1

Overview

NUP5120X6T1 from onsemi is a 5-line monolithic transient voltage suppressor (TVS) array in SOT-563 package, designed for ESD and surge protection of high-speed data lines. It features 5.0 V reverse working voltage, 6.2–7.2 V breakdown voltage at 1 mA, <0.5 µA leakage at 3 V, 54–70 pF line-to-GND capacitance at 1 MHz, and 90 W peak pulse power (8/20 µs). It is used in USB, HDMI, and serial port interfaces of smartphones and notebooks.

For engineers reviewing the NUP5120X6T1 datasheet, pinout, applications, or equivalent options, key selection criteria include IEC 61000-4-2 compliance (15 kV air / 8 kV contact), common-anode 5-line architecture, low clamping voltage under 12 A peak current, and SOT-563 footprint compatibility with space-constrained portable designs.

Technical Context

This device implements a monolithic common-anode TVS structure integrating five independent cathode terminals and one shared anode (Pin 2), enabling simultaneous protection of five signal lines without cross-coupling. Its silicon avalanche junction design delivers fast response (<1 ns) to ESD transients and robust 90 W surge handling per line.

Electrical behavior is defined by tight breakdown voltage tolerance (6.2–7.2 V), low dynamic capacitance (54–70 pF at 0–2.5 V reverse bias), and sub-0.5 µA leakage at VRWM = 3 V - critical for preserving signal integrity in USB 2.0 and UART applications.

Key Specifications

Pinout & Package

SOT-563 (Case 463A, Style 6) is a 6-pin, 1.7 mm × 1.3 mm × 0.6 mm surface-mount package with gull-wing leads and Pb-free finish. Pin 2 is the common anode; Pins 1, 3–6 are individual cathodes for five protected lines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Compared with ESD5Z5.0T1G and SP1003-05UTG, the NUP5120X6T1 offers optimal balance of integration density, IEC 61000-4-2 compliance margin, and cost-per-line - making it ideal for space-limited consumer portables where 54–70 pF capacitance is acceptable.

Availability

NUP5120X6T1 is available at Aetrix Electronics and suitable for USB interface protection, notebook serial port hardening, and HDMI CEC channel safeguarding requiring stable component supply and RoHS-compliant sourcing.

Supply support for NUP5120X6T1 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 power management, analog, sensor, and logic solutions for automotive, industrial, and cloud infrastructure markets.

The NUP5120X6T1 belongs to onsemi's transient voltage suppressor array product line, engineered specifically for compact, multi-line ESD protection in portable and interface-dense electronic systems.

FAQ

What is the maximum clamping voltage of the NUP5120X6T1 at 12 A peak current?

The NUP5120X6T1 exhibits a typical clamping voltage of ≤12 V at 12 A peak current (8/20 µs waveform), as confirmed by Figure 3 in the official datasheet. This value ensures safe operation of downstream 3.3 V and 5 V logic components during ESD and surge events. The clamping performance is consistent across all five lines due to monolithic construction. Designers should verify actual clamping under system-level test conditions using the NUP5120X6T1 in their specific PCB layout and grounding scheme.

Is the NUP5120X6T1 suitable for USB 2.0 high-speed data lines?

Yes, the NUP5120X6T1 is suitable for USB 2.0 high-speed (480 Mbps) data lines because its line-to-GND capacitance is specified at 54–70 pF (1 MHz, 0–2.5 V bias), which preserves signal integrity without excessive rise-time degradation. Its <1 ns response time and low leakage (<0.5 µA) prevent data corruption during idle states. However, designers must route D+ and D− differentially and minimize stub length to maintain impedance control when using the NUP5120X6T1 on these lines.

Does the NUP5120X6T1 require external current-limiting resistors?

No, the NUP5120X6T1 does not require external current-limiting resistors because it operates as a voltage-clamping device with inherent avalanche breakdown behavior. Its design relies on controlled junction conduction rather than series impedance. Adding resistors would degrade ESD response speed and increase voltage overshoot. The NUP5120X6T1 is intended for direct placement between protected line and ground, with Pin 2 (common anode) tied to a low-inductance ground plane.

What is the meaning of the "X6" suffix in NUP5120X6T1?

The "X6" suffix in NUP5120X6T1 identifies the specific variant within the NUP5120 family that uses the SOT-563 package (Case 463A, Style 6) with six leads and common-anode pinout. It distinguishes this version from other package options like SOIC-8 or SC-70 variants. The "T1" denotes tape-and-reel packaging with 4000 units per reel, and "G" indicates Pb-free finish - though "NUP5120X6T1" already implies the Pb-free configuration per onsemi's ordering nomenclature.

How does the common-anode configuration of the NUP5120X6T1 affect circuit grounding?

The common-anode configuration of the NUP5120X6T1 requires Pin 2 to be connected directly to the system's clean, low-impedance ground plane - not to a noisy digital or power ground. This ensures uniform clamping reference for all five protected lines and minimizes ground bounce during ESD events. Improper grounding of Pin 2 can cause unequal clamping thresholds or failure to suppress transients effectively. The NUP5120X6T1's performance is critically dependent on this single-point ground connection.