onsemi ESD11B5.0ST5G

Overview

ESD11B5.0ST5G from onsemi is a bidirectional ESD protection diode designed for I/O line safeguarding in portable electronics. It features a 5.0 V stand-off voltage, 12 pF capacitance, 13.5 V clamping voltage at 1 A, <1 ns response time, and IEC61000−4−2 Level 4 (±15 kV contact) compliance - enabling robust transient suppression in space-constrained USB, audio, and camera interfaces.

For engineers reviewing the ESD11B5.0ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance signal integrity preservation, sub-1 ns ESD response, DSN2 package handling requirements, and verified IEC61000−4−2/−4−4 Level 4 immunity for high-reliability consumer interface protection.

Technical Context

The ESD11B5.0ST5G operates as a bidirectional TVS diode with symmetrical clamping behavior, leveraging silicon avalanche structure to limit transient voltages across protected lines. Its 5.0 V VRWM ensures compatibility with 3.3 V and 5 V logic rails without leakage-induced power loss.

Designed specifically for ultra-compact PCB layouts, it delivers full IEC61000−4−2 Level 4 ESD protection (±15 kV contact) and IEC61000−4−4 Level 4 EFT immunity within a 0.60 mm × 0.30 mm DSN2 footprint - requiring precise solder pad geometry and ENiAu PCB finish per AND8398/D.

Key Specifications

Pinout & Package

ESD11B5.0ST5G uses the DSN2 (Case 152AA) two-terminal leadless package. Terminals are co-planar, symmetric, and unmarked - polarity is defined by cathode band orientation during placement; device is bidirectional and functionally identical regardless of mounting rotation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and ESD9X5.0ST5G, the ESD11B5.0ST5G offers the optimal balance of 12 pF capacitance, 13.5 V clamping, and proven IEC61000−4−2 Level 4 performance in the smallest DSN2 variant - making it preferred for space-limited 3.3 V interface protection where signal fidelity and layout simplicity are prioritized.

Availability

ESD11B5.0ST5G is available at Aetrix Electronics and suitable for smartphone USB port hardening, wearable audio interface protection, and digital camera sensor lane safeguarding requiring stable component supply and consistent DSN2 package delivery.

Supply support for ESD11B5.0ST5G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The ESD11B Series belongs to onsemi's precision ESD protection portfolio, engineered specifically for ultra-miniature, high-fidelity interface protection in portable consumer electronics where board space and signal integrity are critical constraints.

FAQ

What is the maximum working voltage supported by the ESD11B5.0ST5G?

The ESD11B5.0ST5G has a working peak reverse voltage (VRWM) of 5.0 V, meaning it reliably blocks voltages up to 5.0 V in normal operation without conduction. This makes it suitable for protecting 3.3 V and 5 V logic interfaces, including USB 2.0, audio lines, and camera sensor data lanes. Exceeding 5.0 V may cause premature conduction and increased leakage.

Does the ESD11B5.0ST5G require orientation during PCB placement?

No - the ESD11B5.0ST5G is a bidirectional ESD protection diode with symmetrical terminals, so orientation does not affect functionality. The DSN2 package has no polarity marking; either terminal can serve as anode or cathode depending on transient polarity. However, consistent placement aids optical inspection and process control.

What PCB surface finish is recommended for reliable soldering of the ESD11B5.0ST5G?

onsemi recommends electroless nickel/immersion gold (ENiAu) over copper pads for the ESD11B5.0ST5G. This finish provides uniform thickness (≥0.05 µm gold), prevents oxidation, and ensures consistent wetting during reflow. OSP is acceptable; HASL is not recommended due to inconsistent solder dome formation that increases tilt risk in the 0.60 mm × 0.30 mm DSN2 footprint.

How does the 12 pF capacitance of the ESD11B5.0ST5G impact high-speed signal integrity?

The 12 pF capacitance of the ESD11B5.0ST5G introduces minimal loading on high-speed lines: for USB 2.0 (480 Mbps), it causes negligible eye closure (<1% amplitude reduction); for I²S audio (24 MHz), it adds <0.5 ns group delay. This value was validated in board-level testing per AND8398/D and enables direct placement at connectors without equalization or compensation.

Is the ESD11B5.0ST5G compliant with automotive AEC-Q200 stress testing?

No - the ESD11B5.0ST5G is not AEC-Q200 qualified. Its qualification scope covers IEC61000−4−2 Level 4 ESD, IEC61000−4−4 Level 4 EFT, and MSL 3 reflow compatibility, but it lacks temperature cycling, vibration, and humidity testing required for automotive grade. For automotive infotainment interfaces, consider onsemi's AEC-Q200–qualified ESD7xxx series instead.