Nexperia USA Inc. NUP1301U,115

Overview

NUP1301U from Nexperia is an ultra-low-capacitance ESD protection array in SOT323 (SC-70) package, designed for rail-to-rail protection of a single high-speed signal line. It delivers 0.6 pF typical diode capacitance, 30 kV IEC 61000-4-2 contact discharge rating, and clamps transients to ≤20 V at 11 A surge current - enabling robust protection for I²C-bus, analog audio, and antenna power supply interfaces without signal integrity degradation.

For engineers reviewing the NUP1301U datasheet, NUP1301U pinout, NUP1301U application, or NUP1301U equivalent, this device is selected specifically for high-frequency data line protection where sub-1 pF capacitance, fast clamping response, and rail-to-rail bidirectional transient suppression are mandatory - especially in space-constrained portable and audio systems.

Technical Context

The NUP1301U implements a three-terminal rail-to-rail ESD protection topology: Pin 3 (I/O) connects to the protected line, while Pins 1 (GND) and 2 (VCC) provide low-impedance return paths to ground and supply rails respectively. During an ESD event, conduction occurs through internal diodes to either rail, leveraging forward voltage drop (~0.715 V at 1 mA) and low dynamic resistance to limit clamping voltage.

Its architecture supports bidirectional transient suppression per IEC 61000-4-2 and IEC 61000-4-5 (8/20 µs), with verified 11 A peak pulse current handling and 220 W peak pulse power dissipation. Thermal resistance is 625 K/W junction-to-ambient (FR4 PCB, single-sided copper), confirming suitability for low-power, thermally constrained layouts.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mount package: 3-lead, 1.3 mm pitch, 2.0 × 1.25 × 0.95 mm body. Designed for reflow soldering with standard footprint per Figure 10 (Nexperia doc).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD5Z3.3T5G and TPD2E001DRYR, the NUP1301U uniquely provides true rail-to-rail clamping in a single-channel, sub-1 pF package - making it optimal for isolated high-speed lines where minimal capacitive loading and bidirectional transient routing are essential.

Availability

NUP1301U is available at Aetrix Electronics and suitable for telecommunication networks, video line protection, and microcontroller interface protection requiring stable component supply and consistent ESD performance across production batches.

Supply support for NUP1301U 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete, logic, and MOSFET solutions - headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The NUP1301U belongs to Nexperia's ultra-low-capacitance ESD protection portfolio, engineered specifically for high-speed digital and analog signal lines where signal fidelity and compact form factor are critical design constraints.

FAQ

What is the maximum recommended trace length between NUP1301U and the protected connector?

For effective ESD suppression, the trace from the protected I/O pin (Pin 3) to the connector should not exceed 3 mm. Longer traces increase inductance, raising clamping voltage during fast transients. Ground and VCC connections must also be kept short (<5 mm) with direct vias to inner ground planes to minimize loop area and ensure low-impedance return paths.

Can NUP1301U protect both 3.3 V and 5 V I/O rails simultaneously?

Yes - its 80 V V_RRM and rail-to-rail architecture allow use on either 3.3 V or 5 V systems. When placed on a 5 V rail, VCC (Pin 2) connects to 5 V and GND (Pin 1) to system ground; clamping occurs between I/O and whichever rail is closer in voltage during a transient, ensuring protection across both logic families without redesign.

Does NUP1301U require external components for basic ESD protection?

No external components are required for fundamental ESD protection. The device operates as a standalone rail-to-rail clamp. However, for surge-level IEC 61000-4-5 compliance beyond 11 A, a series impedance (e.g., 1–10 Ω resistor) may be added to limit peak current into the device - though this adds propagation delay and is typically avoided in high-speed signal paths.

How does thermal performance affect long-term reliability in continuous operation?

NUP1301U has no DC power dissipation in normal operation (reverse leakage <100 nA at 80 V), so self-heating is negligible. Its 625 K/W junction-to-ambient thermal resistance applies only during transient events. With proper PCB layout (solid ground plane, minimum copper area), junction temperature remains well below 150 °C even after repeated 11 A surges, ensuring >100,000-event lifetime per JEDEC standards.