onsemi ESD5111FCT5G

Overview

ESD5111FCT5G from onsemi is a bidirectional ESD protection diode in WLCSP2 package, designed for I/O line protection in portable electronics. It features 3.3 V reverse working voltage, ≤5.5 pF junction capacitance at 0 V, 5.5 V clamping voltage at 8 A TLP, ±15 kV IEC 61000−4−2 contact/air ESD rating, and operates from −55 °C to +125 °C - ideal for USB, HDMI, and touchscreen interfaces in smartphones and wearables.

For engineers reviewing the ESD5111FCT5G datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance signal integrity preservation, compact 0.6 mm × 0.3 mm footprint, verified IEC Level 4 compliance, and clamping performance under 8 A/16 A TLP stress conditions.

Technical Context

The ESD5111FCT5G implements a silicon avalanche diode structure optimized for fast response (<1 ns) and low dynamic impedance during ESD transients. Its bidirectional configuration provides symmetrical clamping for both positive and negative ESD events without polarity dependence.

It is characterized using Transmission Line Pulse (TLP) testing per ANSI/ESD STM5.5.1 (Z₀ = 50 Ω, tₚ = 100 ns), with clamping voltage measured over 30–60 ns averaging window - directly correlating to real-world IEC 61000−4−2 waveform behavior.

Key Specifications

Pinout & Package

ESD5111FCT5G is housed in a 2-terminal WLCSP2 (Wafer-Level Chip-Scale Package) with 0.6 mm × 0.3 mm body and 0.36 mm pitch. The package uses solder bumps for board attachment and is marked with laser-etched device code on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD5101FCT5G, ESD5111FCT5G provides greater thermal robustness in the same functional class; versus TPD2E001DRYR, it delivers superior board-area efficiency at the cost of ~2 pF higher capacitance - making it optimal for space-constrained 3.3 V I/O protection where 5.5 pF is acceptable.

Availability

ESD5111FCT5G is available at Aetrix Electronics and suitable for smartphone USB interfaces, smartwatch touchscreen controllers, and wireless earbud charging ports requiring stable component supply across high-mix consumer electronics production.

Supply support for ESD5111FCT5G 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 power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The ESD51x1 series was developed specifically for ultra-compact, high-fidelity ESD protection in portable and wearable devices - balancing low capacitance, small footprint, and certified IEC 61000−4−2 Level 4 immunity.

FAQ

What is the package type and dimensions of ESD5111FCT5G?

ESD5111FCT5G uses the WLCSP2 package with mechanical dimensions of 0.6 mm × 0.3 mm and 0.36 mm pitch. It features wafer-level bump interconnects and complies with JEDEC J-STD-020 moisture sensitivity level 1. The package outline is documented as CASE 567AV in onsemi's mechanical drawings.

Does ESD5111FCT5G meet IEC 61000−4−2 Level 4 requirements?

Yes, ESD5111FCT5G is rated for ±15 kV contact discharge and ±15 kV air discharge per IEC 61000−4−2 Level 4. This rating is verified through standardized testing and confirmed in the official datasheet's Maximum Ratings table and Typical Characteristics section (Figures 11–12).

What is the clamping voltage of ESD5111FCT5G at 16 A TLP current?

The clamping voltage of ESD5111FCT5G is 6.5 V at 16 A TLP current (IEC 61000−4−2 Level 2 equivalent). This value is specified in the Electrical Characteristics table and reflects the peak voltage imposed on the protected line during high-energy ESD events, ensuring compatibility with 3.3 V tolerant interfaces.

Can ESD5111FCT5G be used for HDMI or MIPI D-PHY interfaces?

Yes, ESD5111FCT5G is suitable for HDMI and MIPI D-PHY interfaces due to its 5.5 pF typical junction capacitance and verified S21 insertion loss performance up to 800 MHz (Figure 4). Its low capacitance minimizes signal degradation on differential high-speed lines while providing full ±15 kV IEC protection.

Is ESD5111FCT5G RoHS compliant and halogen-free?

Yes, ESD5111FCT5G is Pb-free, halogen-free/BFR-free, and fully RoHS compliant as stated in the Features section of the datasheet. It meets EU Directive 2011/65/EU and satisfies IPC/JEDEC J-STD-609A Class 1 for marking of lead-free products.