onsemi NZQA6V2XV5T1G

Overview

NZQA6V2XV5T1G from onsemi is a quad unidirectional ESD protection diode array in SOT-553 package, featuring 6.2 V nominal breakdown voltage (min 5.89 V, max 6.51 V @ 1 mA), ≤0.5 µA reverse leakage at 4.0 V, 11.5 V clamping voltage at 9.0 A peak pulse current, and IEC 61000-4-2 Level 4 ESD immunity. It protects four independent data or signal lines in space-constrained interfaces such as USB 2.0, HDMI, and industrial sensor buses.

For engineers reviewing the NZQA6V2XV5T1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, line-to-line capacitance (80 pF per diode), thermal derating above 25 °C, and common-anode quad configuration compatibility with ground-referenced signal paths.

Technical Context

The NZQA6V2XV5T1G integrates four monolithic silicon Zener-based transient voltage suppressors in a single common-anode configuration, enabling simultaneous protection of four separate unidirectional signal lines without cross-talk. Its design targets low-capacitance, fast-response ESD suppression for high-speed digital interfaces where board area is constrained.

Each diode exhibits a typical junction capacitance of 80 pF at 0 V bias (1 MHz), a clamping voltage of 11.5 V at 9.0 A peak pulse current (8/20 µs waveform), and a thermal resistance of 370 °C/W (junction-to-ambient), requiring careful PCB copper pour planning for sustained power dissipation beyond 25 °C ambient.

Key Specifications

Pinout & Package

SOT-553 package: 5-pin, surface-mount, Pb-free, MSL1 rated, void-free molded thermoset plastic case with corrosion-resistant finish. Dimensions: 1.60 mm × 1.20 mm × 0.55 mm, 0.50 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD5Z6.2T5G and CM1224-04SO, the NZQA6V2XV5T1G delivers lower per-channel capacitance (80 pF) and tighter breakdown tolerance (±0.31 V) in the smallest quad footprint, making it optimal for high-density, high-speed interface protection where layout area and signal fidelity are critical.

Availability

NZQA6V2XV5T1G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial sensor signal conditioning, and medical device keypad ESD hardening requiring stable component supply and long-term manufacturability.

Supply support for NZQA6V2XV5T1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NZQA6V2XV5T1G belongs to onsemi's transient voltage suppression diode array product line, engineered specifically for compact, high-reliability ESD protection in space-constrained, high-volume electronic systems.

FAQ

What is the exact breakdown voltage range for NZQA6V2XV5T1G?

The NZQA6V2XV5T1G has a guaranteed breakdown voltage range of 5.89 V to 6.51 V at 1 mA test current, as specified in the onsemi datasheet Electrical Characteristics table. This tight 6.2 V nominal tolerance ensures consistent triggering behavior across production lots and supports reliable protection of 5 V logic interfaces without premature conduction or delayed clamping. The NZQA6V2XV5T1G's VBR specification is validated per JEDEC test methods and applies to all four channels simultaneously under standard thermal conditions.

Does NZQA6V2XV5T1G support bidirectional signal lines like I²C?

The NZQA6V2XV5T1G is configured as a quad unidirectional ESD suppressor with a common anode, meaning each channel conducts only from cathode to anode. For true bidirectional lines such as I²C SDA/SCL, two NZQA6V2XV5T1G channels can be used back-to-back (anode-to-anode or cathode-to-cathode) with appropriate pull-up placement, but this requires external routing. The NZQA6V2XV5T1G itself does not provide intrinsic bidirectional clamping; its design intent is for ground-referenced unidirectional signal protection.

What is the maximum peak pulse current NZQA6V2XV5T1G can handle?

The NZQA6V2XV5T1G is rated for a maximum reverse peak pulse current (IPP) of 9.0 A under the standard 8/20 µs double-exponential waveform, as confirmed in the onsemi datasheet's Electrical Characteristics table. This rating assumes operation at TA = 25 °C with proper PCB thermal relief. Derating is required above ambient temperature per the 370 °C/W junction-to-ambient thermal resistance, and the device's 100 W peak power dissipation limit must not be exceeded during transient events.

Is NZQA6V2XV5T1G compliant with automotive standards?

The NZQA6V2XV5T1G is not AEC-Q101 qualified; only the SZ-prefix variants (e.g., SZQA6V2XV5T1G) in this family carry AEC-Q101 qualification and PPAP capability. The NZQA6V2XV5T1G is intended for commercial and industrial applications. Its packaging, Pb-free construction, and IEC 61000-4-2 Level 4 ESD rating meet general reliability requirements, but automotive-grade validation-including extended temperature cycling, humidity testing, and failure analysis-is not applicable to the NZQA6V2XV5T1G part number.

How does the SOT-553 package of NZQA6V2XV5T1G compare to SOT-23 for layout density?

The SOT-553 package of NZQA6V2XV5T1G measures 1.60 mm × 1.20 mm, significantly smaller than standard SOT-23 (2.9 mm × 1.3 mm), reducing board area by over 50% for quad-channel protection. Its 0.50 mm pin pitch and low 0.55 mm profile enable placement adjacent to fine-pitch connectors and high-density BGAs. Unlike SOT-23, SOT-553 uses a 5-pin configuration optimized for common-anode arrays, eliminating the need for external jumper traces and minimizing parasitic inductance in ESD current paths.