onsemi SZMSQA6V1W5T2G

Overview

SZMSQA6V1W5T2G from onsemi is a quad unidirectional ESD protection diode array in SC−88A (SOT−353) package, featuring 6.1–7.2 V breakdown voltage, 3 V working peak reverse voltage, <1 µA leakage at 3 V, 90 pF capacitance at 0 V, and IEC 61000−4−2 Level 4 (±8 kV contact) ESD protection. 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 SZMSQA6V1W5T2G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 12 V at 5 A IPP, low 90 pF line-to-ground capacitance for high-speed signal integrity, AEC−Q101 qualification for automotive use, and SC−88A footprint compatibility with dense PCB layouts.

Technical Context

This device implements a common-anode quad unidirectional configuration-four anodes tied internally, cathodes isolated-enabling independent protection of four signal lines against negative transients while maintaining low forward voltage (<1.25 V @ 200 mA). Its silicon junction design delivers fast response (<1 ns) to ESD events per IEC 61000−4−2.

The SC−88A package supports automated placement and reflow soldering, with thermal resistance R_JA = 325 °C/W enabling operation up to +150 °C junction temperature. Peak pulse power is rated at 150 W (8/20 µs), with clamping voltage ≤12 V at 5 A IPP in reverse direction per Figure 7.

Key Specifications

Pinout & Package

SC−88A (Case 419A−02) is a 5-pin surface-mount package with gull-wing leads, void-free thermosetting plastic body, and corrosion-resistant finish optimized for automated assembly. Pin 1 is marked with microdot or sprocket-hole opposition per T2 suffix.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SZMSQA6V1W5T2G, ES5V3U2U-2/TR offers higher voltage tolerance but sacrifices signal integrity at speed, while TPD4E001DPYR delivers lower capacitance for faster data rates but requires careful V_RWM alignment with system voltage rails.

Availability

SZMSQA6V1W5T2G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI TMDS channel safeguarding, and automotive infotainment display links requiring stable component supply, long-term lifecycle support, and AEC−Q101 compliance.

Supply support for SZMSQA6V1W5T2G 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

SZMSQA6V1W5T2G belongs to onsemi's ESD protection diode portfolio, engineered specifically for high-density, high-reliability transient suppression in automotive-grade and industrial signal interfaces with strict capacitance and clamping constraints.

FAQ

What is the clamping voltage of SZMSQA6V1W5T2G at 5 A peak pulse current?

The clamping voltage of SZMSQA6V1W5T2G is ≤12 V in the reverse direction at I_PP = 5 A, as specified in Figure 7 of the datasheet. This value ensures downstream ICs remain within safe operating voltage during IEC 61000−4−2 ESD events. The SZMSQA6V1W5T2G achieves this performance with low dynamic impedance and fast turn-on characteristics inherent to its silicon junction design.

Is SZMSQA6V1W5T2G suitable for protecting USB 2.0 data lines?

Yes, SZMSQA6V1W5T2G is well-suited for USB 2.0 D+ and D− line protection due to its 90 pF capacitance at 0 V, which minimizes signal distortion at 480 Mbps, and its 3 V working peak reverse voltage, matching standard 3.3 V I/O rail levels. The SZMSQA6V1W5T2G's quad configuration allows full differential pair coverage in a single SC−88A package.

Does SZMSQA6V1W5T2G meet automotive qualification standards?

Yes, SZMSQA6V1W5T2G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix explicitly denoting automotive-grade manufacturing controls and site-specific change management. It operates across −55°C to +150°C junction temperature range and is validated for use in infotainment, ADAS, and body electronics applications.

What is the pin configuration of SZMSQA6V1W5T2G?

SZMSQA6V1W5T2G uses a 5-pin SC−88A (SOT−353) package with pin 1 as the common anode and pins 2–5 as isolated cathodes for four unidirectional protection paths. This layout is confirmed in the marking diagram and package outline (Case 419A−02) in the official datasheet. The SZMSQA6V1W5T2G pinout enables direct routing to four separate signal traces without external interconnects.

How does SZMSQA6V1W5T2G differ from MSQA6V1W5T2G?

SZMSQA6V1W5T2G and MSQA6V1W5T2G share identical electrical specifications, package, and performance characteristics; the "SZ" prefix indicates enhanced process controls, automotive qualification, and PPAP capability per onsemi's internal product segmentation. Both part numbers are functionally interchangeable in design, but SZMSQA6V1W5T2G is designated for automotive and mission-critical applications requiring stricter traceability.