onsemi NZQA6V8XV5T2

Overview

NZQA6V8XV5T2 from onsemi is a quad unidirectional ESD protection diode array in SOT-553 package, featuring 6.8 V breakdown voltage (V_BR @ 1 mA), 12.5 V clamping voltage (V_C) at 8 A peak pulse current, and 0.1 µA reverse leakage at 4.3 V working voltage - deployed for I/O line protection in USB 2.0 interfaces, HDMI ports, and industrial sensor nodes.

For engineers reviewing the NZQA6V8XV5T2 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 8 A I_PP, low 70 pF capacitance per channel, IEC 61000-4-2 Level 4 compliance, and common-anode quad configuration enabling compact four-line protection.

Technical Context

This device implements a monolithic silicon quad ESD suppressor with common-anode topology - all four cathodes are individually accessible while sharing one anode terminal, enabling independent protection of four signal lines without cross-talk. It operates as a voltage-clamped transient absorber, not a regulator or active switch.

Its electrical behavior is defined by Zener-like avalanche breakdown at 6.46–7.14 V, with clamping voltage rising to 12.5 V under 8 A 8/20 µs pulses. Thermal derating follows 370 °C/W junction-to-ambient resistance, limiting steady-state power per diode to 300 mW.

Key Specifications

Pinout & Package

SOT-553 (Case 463B) is a 5-lead surface-mount plastic package with gull-wing leads, 1.5–1.7 mm length, 1.1–1.3 mm width, and 0.5–0.6 mm height - optimized for automated placement and reflow soldering at 260 °C, MSL Level 1 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESDA6V1SC6 and TPD4E001DPYR, NZQA6V8XV5T2 delivers optimal balance of 6.8 V breakdown alignment with 5 V systems, 70 pF bandwidth compatibility with USB 2.0, and 8 A surge capacity - making it preferred for cost-sensitive industrial and medical I/O protection where moderate speed and high reliability coexist.

Availability

NZQA6V8XV5T2 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial sensor node design, and medical front-panel controls requiring stable component supply and long-term lifecycle support.

Supply support for NZQA6V8XV5T2 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 ESD protection solutions for automotive, industrial, and cloud infrastructure markets.

NZQA6V8XV5T2 belongs to the NZQA5V6XV5T1 Series quad ESD suppressor family - engineered specifically for space-constrained, high-density PCBs needing multi-line transient protection without sacrificing signal fidelity or thermal performance.

FAQ

What is the exact breakdown voltage range for NZQA6V8XV5T2?

The NZQA6V8XV5T2 has a specified breakdown voltage (V_BR) of 6.46 V minimum to 7.14 V maximum at 1 mA test current, measured at 25°C ambient. This range ensures reliable triggering across manufacturing tolerances and temperature variation, and is validated per the onsemi datasheet Rev. 1 (April 2005). The nominal value is 6.8 V, matching its part-number designation.

Does NZQA6V8XV5T2 support bidirectional ESD protection?

No, NZQA6V8XV5T2 is strictly unidirectional - it conducts only when cathode voltage exceeds anode voltage by ≥6.46 V. It does not protect against negative transients on the anode side. For bidirectional protection, a separate device such as a symmetric TVS or back-to-back diode configuration is required. The NZQA6V8XV5T2 datasheet explicitly defines it as a unidirectional quad array.

What is the maximum clamping voltage of NZQA6V8XV5T2 under ESD stress?

The maximum clamping voltage (V_C) of NZQA6V8XV5T2 is 12.5 V when subjected to an 8 A peak pulse current with 8/20 µs waveform. This value is guaranteed across temperature and process variation, and represents the highest voltage that will appear across any protected line during a worst-case surge - critical for ensuring compatibility with 3.3 V or 5 V I/O structures.

Can NZQA6V8XV5T2 be used in USB 3.0 or HDMI 2.0 applications?

No - NZQA6V8XV5T2's 70 pF typical capacitance per channel is too high for USB 3.0 (5 Gbps) or HDMI 2.0 (18 Gbps), which require sub-2 pF devices to avoid signal attenuation and eye-diagram closure. It is qualified for USB 2.0 (480 Mbps), HDMI DDC/CEC, and other ≤100 Mbps interfaces where its 70 pF presents negligible impact. Using NZQA6V8XV5T2 in high-speed serial links would degrade signal integrity.

Is NZQA6V8XV5T2 RoHS-compliant and lead-free?

Yes, NZQA6V8XV5T2 is 100% lead-free and complies with RoHS Directive 2011/65/EU. Its SOT-553 package carries MSL Level 1 rating for moisture sensitivity, allowing standard reflow soldering at 260°C without preconditioning. The "100% Lead Free" statement appears verbatim in the onsemi datasheet, and the device is marked and shipped per JEDEC J-STD-020D.2 requirements.