onsemi SZDF6A6.8FUT1G

Overview

SZDF6A6.8FUT1G from onsemi is a quad unidirectional ESD protection diode array in SC−88 package, featuring 6.4–7.2 V breakdown voltage at 5 mA, <1 µA leakage at 5 V, 40 pF typical capacitance, and AEC−Q101 qualification for automotive use. It protects four I/O lines in space-constrained interfaces such as USB, HDMI, and serial data buses.

For engineers reviewing the SZDF6A6.8FUT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 11 V at 1 A, ESD robustness to ±16 kV (air) per IEC61000−4−2 Level 4, low capacitance for high-speed signal integrity, and common-anode quad configuration for compact board layout.

Technical Context

This device implements a quad unidirectional TVS structure with a shared anode, enabling independent transient suppression on four signal lines while minimizing footprint. Its junction design delivers fast response (<1 ns), low dynamic impedance (<30 Ω), and stable clamping performance across temperature (−55 °C to +150 °C).

The SC−88 package supports high-density routing with 0.65 mm pitch and 2.00 × 1.25 mm body size. Thermal resistance of 328 °C/W enables reliable operation at up to 385 mW steady-state power dissipation on standard FR-5 PCBs.

Key Specifications

Pinout & Package

Package: SC−88 (Case 419B−02), 6-pin surface-mount, 2.00 × 1.25 × 0.90 mm, 0.65 mm pitch, Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD5V3U2U-2/TR and TPD4E05U06DQAR, SZDF6A6.8FUT1G offers balanced performance for 5 V systems: moderate capacitance preserves signal fidelity, common-anode architecture simplifies grounding, and AEC−Q101 qualification provides automotive-grade reliability without premium cost.

Availability

SZDF6A6.8FUT1G is available at Aetrix Electronics and suitable for automotive infotainment, industrial communication ports, and consumer USB/HDMI interface designs requiring stable component supply and long-term lifecycle support.

Supply support for SZDF6A6.8FUT1G 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 innovation for automotive, industrial, cloud, medical, and IoT applications.

SZDF6A6.8FUT1G belongs to onsemi's ESD protection portfolio designed specifically for high-reliability, space-constrained interfaces in automotive and industrial environments - emphasizing low capacitance, AEC−Q101 compliance, and multi-line integration.

FAQ

What is the maximum clamping voltage of SZDF6A6.8FUT1G under a 1 A ESD pulse?

The SZDF6A6.8FUT1G exhibits a maximum clamping voltage of 11 V when subjected to a 1 A, 8×20 µs transient pulse. This value is measured per IEC61000−4−2 test conditions and ensures downstream ICs operating at 5 V logic levels remain within safe voltage margins during ESD events. The clamping performance is consistent across the full operating temperature range of −55 °C to +150 °C.

Is SZDF6A6.8FUT1G suitable for protecting USB 2.0 data lines?

Yes, SZDF6A6.8FUT1G is suitable for USB 2.0 data line protection. Its 40 pF typical capacitance introduces negligible signal distortion at 480 Mbps, and its unidirectional quad configuration allows independent D+ and D− line clamping. The 6.8 V nominal breakdown provides adequate margin above the 3.3 V USB signaling level while maintaining fast response (<1 ns) to ESD transients.

Does SZDF6A6.8FUT1G have AEC−Q101 qualification?

Yes, SZDF6A6.8FUT1G carries full AEC−Q101 qualification, as confirmed in the official onsemi datasheet (Rev. 4, June 2024). This includes stress testing for temperature cycling, high-temperature operating life, and ESD robustness - making it appropriate for automotive applications such as body control modules, infotainment systems, and ADAS sensor interfaces.

What is the thermal resistance (R_JA) of SZDF6A6.8FUT1G on a standard FR-5 board?

The thermal resistance (R_JA) of SZDF6A6.8FUT1G is 328 °C/W when mounted on a 1.0 × 0.75 × 0.062 inch FR-5 board, per the manufacturer's test condition. This value supports continuous power dissipation up to 385 mW at 25 °C ambient, derating linearly by 3.0 mW/°C above that temperature - critical for thermal design in enclosed automotive or industrial enclosures.

How does the pinout of SZDF6A6.8FUT1G support common-anode quad configuration?

The SZDF6A6.8FUT1G uses Pins 1–2 and 4–5 as individual cathodes for four protected lines, while Pins 3 and 6 serve as separate common anodes - Pin 3 for Channels 1–2 and Pin 6 for Channels 3–4. This dual-anode arrangement minimizes inter-channel coupling and allows flexible grounding strategies, such as split ground planes or localized filtering, without compromising ESD performance.