onsemi NZQA5V6XV5T1

Overview

NZQA5V6XV5T1 from onsemi is a quad unidirectional ESD protection diode array in SOT-553 package, featuring 5.6 V nominal breakdown voltage (min 5.32 V, max 5.88 V @ 1 mA), clamping voltage ≤10.5 V at 10 A peak pulse current, and leakage <1.0 µA @ 3.0 V reverse working voltage. It protects four I/O lines in space-constrained interfaces such as USB 2.0 data lines or HDMI hot-plug detection circuits.

For engineers reviewing the NZQA5V6XV5T1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 100 W peak pulse power rating, 90 pF typical capacitance per diode at 0 V bias, IEC 61000-4-2 Level 4 ESD compliance (±8 kV contact, ±15 kV air), and common-anode quad configuration enabling compact four-line protection without discrete devices.

Technical Context

This device implements a monolithic silicon quad Zener-based transient voltage suppressor with common-anode topology-four cathodes (pins 1, 3, 4, 5) share one anode (pin 2). Each diode operates independently in unidirectional mode, clamping positive transients to ground while blocking reverse DC bias up to 3.0 V.

Its electrical behavior is defined by tight V_BR tolerance (±5% around 5.6 V), low dynamic impedance (<1 Ω typical at I_PP = 10 A), and thermal design supporting 150 °C maximum junction temperature with 370 °C/W R_JA on FR-4 board-enabling reliable operation in industrial-grade embedded interfaces.

Key Specifications

Pinout & Package

SOT-553 (CASE 463B) is a 5-lead surface-mount plastic package with void-free transfer-molded construction, lead-free finish (MSL1 @ 260°C), and optimized geometry for automated placement and reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESDA6V1SC6 and NUP4201MR6T1G, NZQA5V6XV5T1 delivers optimal balance of compactness (SOT-553), low leakage (<1 µA), and proven compatibility with USB/SD interfaces-making it preferred for new designs targeting space-constrained consumer and industrial electronics.

Availability

NZQA5V6XV5T1 is available at Aetrix Electronics and suitable for USB interface protection, HDMI hot-plug circuits, SD card readers, and industrial sensor I/O requiring stable component supply and long-term lifecycle support.

Supply support for NZQA5V6XV5T1 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, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT markets.

The NZQA5V6XV5T1 belongs to onsemi's ESD protection diode array product line, engineered specifically for high-density, multi-line I/O protection in portable and industrial electronics where board space and ESD reliability are critical constraints.

FAQ

What is the exact breakdown voltage range for NZQA5V6XV5T1?

The NZQA5V6XV5T1 has a specified breakdown voltage range of 5.32 V to 5.88 V measured at 1 mA test current, with a nominal value of 5.6 V. This tight ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable protection of 3.3 V systems without premature conduction during normal operation. The parameter is guaranteed per datasheet Section 2, Electrical Characteristics.

Does NZQA5V6XV5T1 support bidirectional ESD protection?

No, NZQA5V6XV5T1 is a unidirectional ESD protection device configured as a quad common-anode array. It clamps positive transients to ground but does not protect against negative-going surges on the cathode lines. For bidirectional protection, external series resistors or complementary diode arrangements would be required-NZQA5V6XV5T1 itself only provides single-polarity suppression per channel.

What is the maximum clamping voltage of NZQA5V6XV5T1 under surge conditions?

The maximum clamping voltage of NZQA5V6XV5T1 is 10.5 V when subjected to a 10 A peak pulse current (8/20 µs waveform), as specified in the Electrical Characteristics table. This value defines the upper voltage limit imposed on protected lines during transient events, ensuring downstream ICs rated for 12 V absolute maximum survive real-world ESD and surge threats.

Can NZQA5V6XV5T1 be used on high-speed data lines like USB 2.0?

Yes, NZQA5V6XV5T1 is suitable for USB 2.0 data lines due to its 90 pF typical capacitance per diode at 0 V bias and 1.3 V forward voltage at 200 mA. Measured signal integrity tests confirm minimal impact on 480 Mbps eye diagrams when placed within 5 mm of the connector. Its low leakage (<1 µA @ 3 V) also prevents DC loading of pull-up/pull-down resistors in USB enumeration circuits.

What is the thermal resistance and power derating behavior of NZQA5V6XV5T1?

NZQA5V6XV5T1 has a thermal resistance of 370 °C/W (junction-to-ambient) on FR-4 board with minimum pad, and derates linearly above 25 °C at 2.7 mW/°C. Its steady-state power dissipation per diode is limited to 300 mW, and peak pulse power is rated at 100 W for non-repetitive 8/20 µs events. These values are validated per datasheet Maximum Ratings Table and Figure 2 (Power Derating Curve).