onsemi NUP5120X6T2

Overview

NUP5120X6T2 from onsemi is a 5-line monolithic transient voltage suppressor (TVS) array in SOT-563 package, designed for ESD and overvoltage protection of high-speed data lines. It features 5 independent cathode lines with common anode, 5.0 V reverse working voltage, 6.2–7.2 V breakdown voltage at 1 mA, 8 kV IEC 61000-4-2 contact ESD rating, and 54–70 pF line-to-ground capacitance at 1 MHz - deployed in USB, HDMI, and serial port interfaces of portable electronics.

For engineers reviewing the NUP5120X6T2 datasheet, pinout, applications, or equivalent options, key selection factors include clamping voltage under 16 V at 10 A peak current, low leakage (<0.5 µA at 3 V), Pb-free SOT-563 footprint compatibility, and Class 3B HBM ESD robustness for handheld device front-end protection.

Technical Context

This device implements a common-anode TVS architecture where five cathodes (Pins 1, 3–6) share one anode (Pin 2), enabling simultaneous bidirectional ESD suppression across five signal lines without cross-coupling. Its silicon avalanche structure delivers fast response (<1 ns) to transients while maintaining low dynamic impedance below 0.5 Ω during clamping.

Designed for I/O line protection in space-constrained portable systems, it operates within −40°C to +125°C junction temperature range and supports peak pulse power up to 90 W (8/20 µs waveform). Capacitance is specified at both 0 V and 2.5 V reverse bias to reflect real-world signal integrity impact on high-speed interfaces.

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 1 is marked with microdot or notch orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD5Z5.0T1G and SP1006-04UTG, the NUP5120X6T2 uniquely delivers five-line protection in a single SOT-563 footprint with balanced clamping and verified 8 kV contact ESD performance - making it optimal for cost-sensitive, space-constrained USB and serial interface designs requiring full-line coverage.

Availability

NUP5120X6T2 is available at Aetrix Electronics and suitable for USB interface protection, HDMI DDC safeguarding, and smartphone keypad ESD hardening requiring stable component supply across high-volume consumer electronics production.

Supply support for NUP5120X6T2 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 manufacturer specializing in energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, cloud computing, and portable electronics.

The NUP5120X6T2 belongs to onsemi's transient voltage suppressor array product line, engineered specifically for high-density ESD protection of multi-line digital interfaces in handheld and IoT edge devices.

FAQ

What is the maximum clamping voltage of the NUP5120X6T2 under a 10 A transient current?

The NUP5120X6T2 exhibits a maximum clamping voltage of 16 V when subjected to a 10 A peak pulse current (8/20 µs waveform), as confirmed in Figure 3 of the official datasheet. This value ensures downstream ICs remain within safe operating limits during ESD events. The NUP5120X6T2 achieves this via low-impedance avalanche conduction, and its clamping performance is validated across the full −40°C to +125°C operating range.

Does the NUP5120X6T2 support IEC 61000-4-2 Level 4 ESD immunity?

Yes, the NUP5120X6T2 is rated for 15 kV air discharge and 8 kV contact discharge per IEC 61000-4-2, satisfying Level 4 - the highest immunity class defined in the standard. This rating is measured on the packaged device and applies to all five protected lines simultaneously. The NUP5120X6T2 achieves this through optimized junction design and monolithic integration, not external circuitry.

How many signal lines can the NUP5120X6T2 protect, and what is the pin configuration?

The NUP5120X6T2 protects exactly five independent signal lines using a common-anode architecture: Pins 1, 3, 4, 5, and 6 serve as individual cathodes, while Pin 2 is the shared anode. This configuration is explicitly defined in the "PIN ASSIGNMENT" section and marking diagram of the NUP5120X6T2 datasheet. No sixth functional line is supported.

What is the typical capacitance of the NUP5120X6T2, and how does it affect high-speed signals?

The NUP5120X6T2 has a typical capacitance of 54–70 pF per line (measured line-to-ground at 1 MHz), depending on applied reverse bias. At 0 V bias, capacitance is ~70 pF; at 2.5 V, it drops to ~54 pF. This range is optimized to suppress ESD without degrading rise times on USB 2.0 (480 Mbps) or UART (3 Mbps) signals. The NUP5120X6T2's capacitance is characterized and guaranteed across temperature and voltage, not estimated.

Is the NUP5120X6T2 RoHS compliant and lead-free?

Yes, the NUP5120X6T2 is a certified Pb-free device, as stated in the "Features" section and "ORDERING INFORMATION" table of its datasheet. It complies with RoHS Directive 2011/65/EU and uses matte tin lead finish. The "G" suffix in part numbers like NUP5120X6T2G explicitly denotes Pb-free packaging, and the SOT-563 case meets JEDEC J-STD-020 moisture sensitivity level 1 requirements.