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onsemi ESD9R3.3ST5G
- Part No.:
- ESD9R3.3ST5G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-923
- Datasheet:
-
ESD9R3.3ST5G.pdf
- Description:
- TVS DIODE 3.3VWM 7.8VC SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:95,299
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Product details
Overview
ESD9R3.3ST5G from onsemi is a unidirectional ultra-low-capacitance ESD protection diode designed for high-speed data lines in space-constrained, low-leakage applications such as human body sensors and wearable interfaces. It features 3.3 V stand-off voltage, 0.5 pF typical capacitance, <1 nA reverse leakage (0°C to 50°C), 7.8 V clamping voltage at 1 A IPP, and IEC 61000-4-2 Level 4 (±15 kV air / ±10 kV contact) compliance.
For engineers reviewing the ESD9R3.3ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include sub-1 nA leakage at elevated temperature, sub-1 ns response time, SOD-923 package footprint compatibility, and clamping performance under IEC 61000-4-2 8 kV contact discharge waveforms.
Technical Context
This device operates as a unidirectional transient voltage suppressor, leveraging silicon avalanche breakdown to clamp ESD transients before they reach sensitive downstream ICs. Its low 0.5 pF capacitance minimizes signal integrity impact on USB 2.0, I²C, and MIPI D-PHY lines, while its 3.3 V VRWM ensures compatibility with 3.3 V logic rails without false triggering.
The SOD-923 package enables placement directly at connector entry points, and its <1.0 ns response time ensures turn-on before peak ESD current reaches the protected IC. The 7.8 V VC at 1 A IPP provides margin below typical 12 V absolute maximum ratings of interface transceivers and sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage | 3.3 V - Blocks normal 3.3 V rail operation without conduction |
| Clamping Voltage | 7.8 V max @ 1 A IPP - Limits transient voltage to safe level for 3.3 V I/O structures |
| Capacitance | 0.5 pF @ 0 V, 1 MHz - Enables use on >480 Mbps USB 2.0 and 1 Gbps MIPI D-PHY lines |
| Leakage Current | <1 nA @ 1 V, 0°C–50°C - Preserves battery life in always-on sensor nodes |
| ESD Rating | IEC 61000-4-2 Level 4: ±15 kV air / ±10 kV contact - Meets industrial and portable electronics immunity requirements |
| Response Time | <1.0 ns - Activates before ESD pulse peak (tP ≈ 0.7–1 ns) reaches protected circuit |
| Package | SOD-923 (1.00 mm × 0.60 mm × 0.37 mm) - Fits tight PCB real estate near USB micro-B or FPC connectors |
Pinout & Package
SOD-923 surface-mount package: 2-terminal, ultra-compact outline (1.00 mm × 0.60 mm × 0.37 mm), matte tin lead finish, MSL 1, Pb-free and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Protected Line Input | Connected to high-speed data line (e.g., USB D+, I²C SDA); polarity band identifies cathode |
| 2 (Anode) | GND Reference | Direct low-inductance connection to system ground plane required for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low leakage | <1 nA over 0°C–50°C enables multi-year battery operation in wearables and IoT sensors |
| Sub-0.6 pF capacitance | Preserves signal rise/fall times on 480 Mbps USB 2.0 and 1 Gbps MIPI D-PHY buses |
| Low clamping voltage | 7.8 V max at 1 A ensures robust protection margin for 3.3 V I/O cells with 12 V abs max rating |
| SOD-923 footprint | 0.6 mm width allows placement adjacent to micro-USB or FPC connectors without routing detours |
| AEC-Q101 qualified | Validated for automotive infotainment and ADAS sensor interfaces requiring extended reliability |
Applications
| USB 2.0 Interface Protection | I²C Sensor Bus Protection |
|---|---|
Use Scenario: Protecting USB D+/D− lines in portable medical monitors and handheld test equipment against repeated ESD events during field use. IC Role / Device Role: Unidirectional shunt clamp placed between data line and ground, triggered only during overvoltage transients. Use Value: 0.5 pF capacitance prevents signal degradation at 480 Mbps; 7.8 V clamping avoids damage to USB PHY transceivers rated for 12 V abs max. | Use Scenario: Safeguarding I²C SDA/SCL lines connecting MEMS accelerometers and environmental sensors in battery-powered asset trackers. IC Role / Device Role: Standby-mode ESD suppressor with sub-1 nA leakage, preserving µA-level sleep current budgets. Use Value: Leakage <1 nA at 50°C extends 10-year battery life; SOD-923 size fits within 1.5 mm² board area near sensor FPC connector. |
| MIPI D-PHY Camera Interface | Automotive Infotainment Touch Panel |
Use Scenario: ESD hardening of MIPI D-PHY differential pairs in smartphone front-facing cameras and AR glasses. IC Role / Device Role: High-speed bidirectional-capable unidirectional clamp (anode grounded) on each data lane. Use Value: 0.5 pF capacitance maintains 1+ Gbps eye diagram integrity; <1 ns response captures full ESD waveform before receiver input stage. | Use Scenario: Protecting projected capacitive touch controller I/Os in automotive center displays exposed to glove- and finger-based ESD. IC Role / Device Role: AEC-Q101-qualified unidirectional TVS on each touch sense line, mounted at display flex cable entry point. Use Value: ±15 kV air discharge rating meets ISO 10605 requirements; 3.3 V VRWM matches touch controller I/O voltage domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD1E05U06DPYR | 0.6 pF capacitance, 5.5 V VRWM, 12 V clamping @ 1 A, 0402 package (1.0 mm × 0.5 mm) | Higher clamping voltage reduces margin for 3.3 V I/O; slightly larger footprint than SOD-923 | Select when higher VRWM tolerance is needed for mixed-voltage systems |
| UMK105CG3R3CV-F | 3.3 V rated multilayer ceramic varistor (MLCV), 0.8 pF, 12 V clamping @ 1 A, 0201 package | Higher capacitance limits use to ≤100 Mbps interfaces; lower surge current handling than silicon diode | Prefer for cost-sensitive consumer applications where 0.8 pF is acceptable |
Compared with TPD1E05U06DPYR and UMK105CG3R3CV-F, ESD9R3.3ST5G delivers superior clamping margin (7.8 V vs. ≥12 V) and lower capacitance (0.5 pF) in the smallest footprint, making it optimal for high-speed, space-constrained, and low-leakage designs.
Availability
ESD9R3.3ST5G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, I²C sensor bus hardening, and MIPI D-PHY camera interface ESD suppression requiring stable component supply across production lifecycles.
Supply support for ESD9R3.3ST5G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The ESD9R family targets ultra-low-leakage, high-speed ESD protection for next-generation wearables, medical sensors, and automotive human-machine interfaces, emphasizing minimal signal distortion and long-term battery preservation.
FAQ
What is the maximum clamping voltage of ESD9R3.3ST5G under IEC 61000-4-2 conditions?
The ESD9R3.3ST5G has a maximum clamping voltage of 7.8 V when subjected to a 1 A peak pulse current (IPP), per the IEC 61000-4-2 waveform definition. This value is measured using the standardized 8/20 µs pulse shape and ensures safe voltage limiting for 3.3 V interface ICs. The actual clamping behavior is verified via oscilloscope screenshots included in the official onsemi datasheet for ESD9R3.3ST5G.
Is ESD9R3.3ST5G suitable for bidirectional signal lines like USB D+ and D−?
Yes, ESD9R3.3ST5G is unidirectional but can protect bidirectional data lines such as USB D+ and D− when configured with anode tied to ground and cathode on the signal line. Its low 0.5 pF capacitance and fast <1 ns response preserve signal integrity on 480 Mbps USB 2.0 links. For true bidirectional protection, two ESD9R3.3ST5G devices (one per line) are used in standard shunt configuration.
What is the operating temperature range for ESD9R3.3ST5G leakage specification?
The ESD9R3.3ST5G guarantees reverse leakage current of less than 1 nA over the ambient temperature range of 0°C to 50°C, as specified in the onsemi datasheet. This makes it ideal for battery-powered wearable sensors and portable diagnostics equipment where low standby current is critical. Junction temperature range extends to −55°C to +125°C, supporting broader system-level thermal design.
Does ESD9R3.3ST5G meet automotive qualification standards?
Yes, the SZ-prefix variant SZESD9R3.3ST5G is AEC-Q101 qualified and PPAP capable, meeting automotive reliability requirements. While ESD9R3.3ST5G itself is the commercial-grade version, it shares identical electrical and mechanical specifications with the automotive variant and is widely used in infotainment and ADAS sensor interfaces where AEC-Q101 is not mandated but robustness is required.
What package type and dimensions does ESD9R3.3ST5G use?
ESD9R3.3ST5G uses the SOD-923 package (case 514AB), measuring 1.00 mm × 0.60 mm × 0.37 mm with a 0.4 mm body height. It features a 2-pin configuration: Pin 1 is cathode (marked with polarity band), Pin 2 is anode. The package is Pb-free, halogen-free, and rated MSL 1, compatible with standard reflow profiles up to 260°C peak temperature.
ESD9R3.3ST5G 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):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 4.8V
- Voltage - Clamping (Max) @ Ipp:
- 7.8V
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
ESD9R3.3ST5G FAQ
1.How can I place an order for ESD9R3.3ST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for ESD9R3.3ST5G 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 ESD9R3.3ST5G reliable?
The price and inventory of ESD9R3.3ST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESD9R3.3ST5G is usually 5 days.
3.What payment methods are accepted for ESD9R3.3ST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESD9R3.3ST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESD9R3.3ST5G?
ESD9R3.3ST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESD9R3.3ST5G 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 ESD9R3.3ST5G?
For technical support, including ESD9R3.3ST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESD9R3.3ST5G requirements.
6.How does Aetrix verify that ESD9R3.3ST5G is sourced from the original manufacturer or authorized distributors?
All ESD9R3.3ST5G 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 ESD9R3.3ST5G meets industry standards.
7.What is the process for return or replacement of ESD9R3.3ST5G?
All ESD9R3.3ST5G units undergo pre-shipment inspection (PSI). If there is an issue with ESD9R3.3ST5G, 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 ESD9R3.3ST5G part is unused and in its original packaging.
Return procedure for ESD9R3.3ST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESD9R3.3ST5G Tags
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