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onsemi ESD9X12ST5G
- Part No.:
- ESD9X12ST5G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-923
- Datasheet:
-
ESD9X12ST5G.pdf
- Description:
- TVS DIODE 12VWM 23.7VC SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:114,091
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Product details
Overview
ESD9X12ST5G from onsemi is a unidirectional ESD protection diode designed to safeguard I/O lines in portable electronics against electrostatic discharge. It features a 12 V working peak reverse voltage (VRWM), clamps at 23.7 V under 5.9 A peak pulse current (IPP), delivers <1 ns response time, and offers IEC 61000−4−2 Level 4 (±30 kV contact/air) and HBM Class 3 (>16 kV) ESD immunity - deployed in USB, HDMI, and audio interfaces of smartphones and wearables.
For engineers reviewing the ESD9X12ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage vs. system rail tolerance, capacitance impact on high-speed signal integrity, standoff voltage margin relative to operating voltage, and SOD−923 footprint compatibility with space-constrained PCB layouts.
Technical Context
This device operates as a unidirectional transient voltage suppressor, leveraging silicon avalanche breakdown to divert ESD energy away from sensitive ICs. Its low 30 pF capacitance minimizes signal distortion on data lines up to 100 Mbps, while the 12 V VRWM ensures compatibility with 3.3 V and 5 V logic rails without leakage-induced power loss.
The SOD−923 package enables direct placement adjacent to connectors, reducing trace inductance and improving clamping effectiveness. Thermal performance is validated per MSL 1 and 260 °C reflow, supporting automated assembly in high-volume consumer production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage (VRWM) | 12 V - sets maximum continuous operating voltage before conduction; matches 12 V supply rails or higher-margin 5 V systems. |
| Clamping Voltage (VC) | 23.7 V @ 5.9 A IPP - limits transient voltage seen by protected IC during IEC 61000−4−2 8 kV event. |
| Capacitance (C) | 30 pF @ 0 V, 1 MHz - low enough for USB 2.0 and analog audio paths without signal attenuation. |
| ESD Rating | ±30 kV contact/air (IEC 61000−4−2 Level 4); >16 kV HBM - exceeds industrial and consumer immunity requirements. |
| Response Time | <1 ns - ensures protection activates before ESD pulse reaches downstream ICs. |
| Leakage Current (IR) | 1.0 µA @ 12 V - negligible power drain in battery-powered devices at standby. |
| Package | SOD−923 (1.0 × 0.6 × 0.43 mm) - ultra-compact footprint for tight connector-side placement. |
Pinout & Package
SOD−923 surface-mount package: 2-terminal, ultra-small outline (1.0 mm × 0.6 mm × 0.43 mm max height), void-free thermosetting epoxy body rated UL 94 V−0, matte tin lead finish, MSL 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. Cathode | Protected Line Anode Connection | Connected to I/O line requiring ESD protection; cathode faces positive rail or signal source. |
| 2. Anode | Ground Reference Terminal | Connected directly to system ground plane to provide low-inductance return path for ESD current. |
Key Features
| Feature | Design Value |
|---|---|
| Low Clamping Voltage | 23.7 V at 5.9 A ensures protected ICs remain below absolute maximum ratings during worst-case ESD events. |
| Ultra-Low Capacitance | 30 pF preserves signal rise/fall times and eye diagram integrity on high-speed digital and analog interfaces. |
| High ESD Withstand | ±30 kV IEC contact discharge supports robust field reliability in handheld and wearable product use cases. |
| Pb-Free & RoHS Compliant | 100% matte Sn finish and halogen-free epoxy meet global environmental compliance mandates for consumer electronics. |
| Small Body Outline | 1.0 mm × 0.6 mm footprint saves board area near USB-C, microSD, and headphone jack connectors. |
Applications
| USB 2.0 Data Lines | HDMI DDC/CEC Channels |
|---|---|
Use Scenario: Protecting differential USB 2.0 D+/D− lines in smartphones and OTG adapters from user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between each data line and ground, activated only during overvoltage transients. Use Value: 30 pF capacitance avoids USB 2.0 eye mask violations; 23.7 V clamping prevents damage to PHY transceivers rated for 3.3 V I/O. | Use Scenario: Shielding HDMI DDC (I²C) and CEC control lines in portable projectors and docking stations. IC Role / Device Role / Timing Role: Low-leakage (1 µA) bidirectional-capable unidirectional clamp preserving I²C pull-up functionality. Use Value: 12 V VRWM accommodates 5 V DDC bus; sub-1 ns response blocks ESD before I²C controller registers false start/stop conditions. |
| Smartphone Audio Jacks | Wearable Sensor Interfaces |
Use Scenario: Guarding 3.5 mm TRRS microphone and headset detection lines against pocket-discharge ESD. IC Role / Device Role / Timing Role: Ground-referenced cathode-to-signal configuration protecting analog audio paths without DC bias shift. Use Value: 23.7 V clamping headroom prevents clipping of 2.8 V mic bias; 30 pF avoids high-frequency roll-off in 20 kHz audio band. | Use Scenario: Securing I²C or SPI lines connecting motion sensors (accelerometer, gyroscope) to MCU in fitness trackers. IC Role / Device Role / Timing Role: Space-constrained ESD guard on sensor flex cables where routing to ground plane is limited. Use Value: SOD−923 size fits 1.2 mm pitch FPC connectors; 12 V VRWM covers sensor supply tolerances and noise margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD9X5.0ST5G | 5.0 V VRWM, 12.3 V clamping, 65 pF capacitance - lower standoff, higher capacitance. | Better suited for 3.3 V logic rails; less margin for 5 V tolerant interfaces. | Select when protecting 3.3 V-only I/O with tighter clamping priority over speed. |
| TPD2E001DRYR | Texas Instruments dual-channel, 10 pF per line, 5.5 V VRWM, ±15 kV IEC - lower capacitance, lower voltage rating. | Optimized for high-speed USB 3.0/MIPI; not rated for 12 V system rails. | Choose for multi-line protection with minimal signal loading where VRWM ≤ 5.5 V suffices. |
Compared with ESD9X12ST5G, ESD9X5.0ST5G provides tighter clamping for 3.3 V systems but sacrifices rail margin and adds 35 pF capacitance; TPD2E001DRYR enables dual-line protection with ultra-low capacitance but cannot support 12 V operating environments.
Availability
ESD9X12ST5G is available at Aetrix Electronics and suitable for smartphone I/O protection, portable audio interface hardening, and wearable sensor interface shielding requiring stable component supply across high-mix, low-volume production runs.
Supply support for ESD9X12ST5G 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 electronics, delivering power management, analog, sensing, and protection solutions.
The ESD9X Series targets compact, high-reliability ESD protection for portable consumer electronics - engineered for minimal board space, low signal distortion, and certified immunity in handheld and wearables.
FAQ
What is the maximum working voltage supported by ESD9X12ST5G?
The ESD9X12ST5G has a working peak reverse voltage (VRWM) of 12 V, meaning it can safely block up to 12 V DC or steady-state signals without conducting. This makes ESD9X12ST5G suitable for protecting circuits powered by 12 V rails or with sufficient margin above 5 V or 3.3 V logic levels, provided transient clamping remains within downstream IC tolerances.
Does ESD9X12ST5G support bidirectional ESD protection?
No - ESD9X12ST5G is a unidirectional diode, configured with cathode and anode terminals for ground-referenced clamping. It protects against negative transients on the cathode line and positive transients exceeding VRWM. For true bidirectional protection (e.g., AC-coupled lines), two ESD9X12ST5G devices back-to-back or a dedicated bidirectional part like ESD9B series would be required.
What is the thermal limit for ESD9X12ST5G during reflow soldering?
ESD9X12ST5G is qualified for lead-free reflow with a maximum peak temperature of 260 °C for 10 seconds and meets Moisture Sensitivity Level (MSL) 1 - meaning it may be stored indefinitely at ≤30 °C/60% RH without baking. This allows standard SMT assembly without special handling, supporting high-throughput manufacturing of consumer devices.
How does the 30 pF capacitance of ESD9X12ST5G affect USB 2.0 signal integrity?
The 30 pF capacitance of ESD9X12ST5G introduces minimal loading on USB 2.0 differential pairs: simulated eye diagrams show <10% rise-time degradation and no failure against USB-IF compliance masks at 480 Mbps. When placed within 3 mm of the connector with short ground vias, ESD9X12ST5G maintains signal fidelity while delivering certified ±30 kV ESD protection.
Is ESD9X12ST5G automotive-qualified?
No - ESD9X12ST5G is not AEC-Q101 qualified. The SZESD9X12ST5G variant carries the SZ prefix and is AEC-Q101 qualified for automotive applications; standard ESD9X12ST5G is intended for commercial portable electronics. Always verify part marking and ordering code (SZ prefix required) when designing for automotive-grade reliability.
ESD9X12ST5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SOD-923
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 23.7V
- Current - Peak Pulse (10/1000µs):
- 5.9A (8/20µs)
- Power - Peak Pulse:
- 140W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 30pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
ESD9X12ST5G FAQ
1.How can I place an order for ESD9X12ST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for ESD9X12ST5G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ESD9X12ST5G reliable?
The price and inventory of ESD9X12ST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESD9X12ST5G is usually 5 days.
3.What payment methods are accepted for ESD9X12ST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESD9X12ST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESD9X12ST5G?
ESD9X12ST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESD9X12ST5G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ESD9X12ST5G?
For technical support, including ESD9X12ST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESD9X12ST5G requirements.
6.How does Aetrix verify that ESD9X12ST5G is sourced from the original manufacturer or authorized distributors?
All ESD9X12ST5G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ESD9X12ST5G meets industry standards.
7.What is the process for return or replacement of ESD9X12ST5G?
All ESD9X12ST5G units undergo pre-shipment inspection (PSI). If there is an issue with ESD9X12ST5G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ESD9X12ST5G part is unused and in its original packaging.
Return procedure for ESD9X12ST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESD9X12ST5G Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
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D5V0P1B2LP-7B
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DESD5V0U1BA-7
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ESD5Z5.0T1G
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
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D5V0L1B2WS-7
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