onsemi SZESD11A5.0DT5G

Overview

SZESD11A5.0DT5G from onsemi is a unidirectional ESD protection diode in SOT-1123 package, designed to clamp transient voltages to ≤9.5 V at 1 A peak pulse current, with 5.0 V working peak reverse voltage and ≤0.1 µA leakage at VRWM, protecting high-speed data lines in portable electronics against IEC 61000-4-2 Level 4 (±15 kV contact) ESD events.

For engineers reviewing the SZESD11A5.0DT5G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 8/20 µs surge, ultra-low capacitance (20 pF), sub-1 ns response time, AEC-Q101 qualification, and SOT-1123 footprint compatibility for space-constrained USB, HDMI, and audio interface layouts.

Technical Context

The SZESD11A5.0DT5G integrates two unidirectional ESD protection diodes sharing a common anode (Pin 3) and separate cathodes (Pins 1 and 2), enabling dual-line protection without cross-coupling. Its low 20 pF capacitance (measured pin1–pin3 and pin2–pin3 at 1 MHz, 0 V bias) minimizes signal integrity impact on high-speed interfaces.

Clamping behavior follows the IEC 61000-4-2 8 kV contact discharge waveform, delivering 9.5 V max clamping at 1 A IPP with <1 ns response time. It meets MSL 1 reflow requirements (260°C, 10 s) and operates across −55°C to +125°C junction temperature range.

Key Specifications

Pinout & Package

SOT-1123 (Case 524AA) is a 3-pin, ultra-small surface-mount package measuring 1.0 mm × 0.6 mm × 0.4 mm, with matte tin lead finish, UL 94 V-0 epoxy, and MSL 1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD5Z5.0T5G and CM1213A-03SO, SZESD11A5.0DT5G delivers superior high-speed interface support via its 20 pF capacitance and 9.5 V clamping in the smallest SOT-1123 footprint-critical for next-gen mobile and automotive displays where board area and signal fidelity are constrained.

Availability

SZESD11A5.0DT5G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI data lane safeguarding, and automotive infotainment display link applications requiring stable component supply and guaranteed long-term sourcing.

Supply support for SZESD11A5.0DT5G 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 technologies for automotive, industrial, cloud, and intelligent edge applications.

The ESD11A Series, including SZESD11A5.0DT5G, was engineered specifically for ultra-compact, high-fidelity ESD protection in portable and automotive electronics where board space and signal integrity are critical constraints.

FAQ

What is the maximum clamping voltage of SZESD11A5.0DT5G under IEC 61000-4-2 stress?

The SZESD11A5.0DT5G exhibits a maximum clamping voltage of 9.5 V when subjected to a 1 A peak pulse current, per the IEC 61000-4-2 8/20 µs waveform. This value is measured across each cathode-to-anode path (Pin 1–Pin 3 and Pin 2–Pin 3) and ensures protected ICs remain within safe voltage margins during ±15 kV contact discharge events. The SZESD11A5.0DT5G datasheet specifies this parameter under standard test conditions at TA = 25°C.

Does SZESD11A5.0DT5G support bidirectional signal lines like USB D+ and D−?

Yes, SZESD11A5.0DT5G supports bidirectional data lines such as USB D+ and D− through its dual unidirectional configuration: Pins 1 and 2 serve as independent cathodes, while Pin 3 is the common anode tied to ground. This architecture provides symmetrical clamping for positive and negative transients on each line without forward conduction during normal signal swing. The SZESD11A5.0DT5G achieves this with 20 pF capacitance per channel, preserving signal integrity.

Is SZESD11A5.0DT5G qualified for automotive applications?

Yes, SZESD11A5.0DT5G is AEC-Q101 qualified and PPAP capable, confirming its reliability for automotive-grade ESD protection. It operates across −55°C to +125°C junction temperature range and meets MSL 1 reflow requirements (260°C, 10 s). These qualifications make SZESD11A5.0DT5G suitable for infotainment display links, camera sensor interfaces, and telematics modules where robustness against system-level ESD is mandatory.

What is the capacitance of SZESD11A5.0DT5G and how does it affect high-speed signals?

SZESD11A5.0DT5G has a typical capacitance of 20 pF per channel (Pin 1–Pin 3 and Pin 2–Pin 3) at 0 V bias and 1 MHz. This low value minimizes signal attenuation and timing skew on high-speed differential pairs, enabling reliable use on USB 2.0 (480 Mbps), HDMI TMDS, and MIPI D-PHY lanes. The SZESD11A5.0DT5G's capacitance is verified per the manufacturer's electrical characteristics table and supports clean eye diagrams up to 1.5 Gbps.

Can SZESD11A5.0DT5G replace a 3.3 V-rated ESD diode like ESD11A3.3DT5G?

No-SZESD11A5.0DT5G has a 5.0 V working peak reverse voltage (VRWM), making it unsuitable as a direct replacement for 3.3 V systems where clamping must begin below 3.3 V logic thresholds. Using SZESD11A5.0DT5G in place of ESD11A3.3DT5G risks insufficient protection during low-voltage ESD events. Always match VRWM to the protected line's operating voltage; the SZESD11A5.0DT5G is optimized for 5.0 V nominal interfaces.