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Vishay General Semiconductor - Diodes Division VGSOT03-G3-18
- Part No.:
- VGSOT03-G3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
VGSOT03-G3-18.pdf
- Description:
- TVS DIODE 3.3VWM 12.3VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,099
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Product details
Overview
VGSOT03-G3-18 from Vishay Semiconductors is a unidirectional single-line ESD protection diode in SOT-23 package, designed for high-reliability signal-line protection in automotive and industrial interfaces. It delivers ±30 kV IEC 61000-4-2/ISO 10605 ESD immunity, 4 V breakdown voltage (VBR), 3.3 V reverse working voltage (VRWM), and 540 W peak pulse power (8/20 μs), enabling robust transient suppression on low-voltage data lines such as USB 2.0 or CAN FD physical layer inputs.
For engineers reviewing the VGSOT03-G3-18 datasheet, VGSOT03-G3-18 pinout, VGSOT03-G3-18 application, or VGSOT03-G3-18 equivalent, this page provides verified electrical parameters, BiAs-mode clamping behavior, AEC-Q101 qualification status, SOT-23 footprint compatibility, and real-world use cases in automotive infotainment and industrial sensor interfaces.
Technical Context
The VGSOT03-G3-18 operates in Bidirectional Asymmetrical (BiAs) protection mode: pin 1 is grounded, pin 3 connects to the protected line, and clamping occurs at distinct forward (≈1.0–4.5 V) and reverse (≈5.7–12.3 V) voltages depending on transient polarity and amplitude. Its unidirectional configuration enables precise low-VRWM alignment with 3.3 V logic rails while maintaining high isolation (<100 μA leakage at VRWM).
It meets AEC-Q101 stress requirements including human body model Class H3B (>8 kV), supports MSL Level 1 reflow (peak 260 °C), and uses Sn (e3) terminations on UL 94 V-0 molding compound - confirming suitability for automotive under-hood and dashboard electronics where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 3.3 V - Maximum continuous reverse voltage before leakage exceeds 100 μA; matches standard 3.3 V I/O rail operation without false triggering. |
| VBR (min/typ/max) | 4.0 / 4.6 / 5.5 V - Breakdown threshold at 1 mA; ensures reliable turn-on during fast transients while avoiding conduction during normal 3.3 V signaling. |
| VC @ 44 A (8/20 μs) | 9.2–12.3 V - Clamped voltage during worst-case surge; limits downstream IC stress to safe levels below typical 12 V supply rails. |
| CD @ 0 V / 1 MHz | 460–600 pF - Junction capacitance at zero bias; impacts high-speed signal integrity but remains acceptable for ≤100 Mbps interfaces like RS-485 or LIN. |
| ESD immunity | ±30 kV contact/air discharge (IEC 61000-4-2 & ISO 10605) - Full compliance with automotive ESD test requirements for exposed connectors and buttons. |
| PPPM (8/20 μs) | 540 W - Peak pulse power handling capacity; sustains multiple 44 A surges without degradation, supporting repetitive ESD events in factory environments. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive zones and industrial enclosures without derating. |
Pinout & Package
SOT-23 package: 3-pin, surface-mount, gull-wing leads; 2.9 mm × 1.3 mm × 1.01 mm body; MSL Level 1; 9.2 mg weight; UL 94 V-0 flammability rating; compatible with standard SOT-23 footprint (0.95 mm lead pitch, 0.4 mm lead width).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Ground (cathode connection) | Low-inductance return path for ESD current; must be connected to solid system ground plane for effective clamping. |
| Pin 2 | No internal connection | Electrically isolated; no PCB trace or solder mask required - simplifies layout and avoids accidental shorts. |
| Pin 3 | Anode (protected line input) | Connects directly to the signal/data line requiring protection; clamps transients to ground via bidirectional asymmetrical conduction. |
Key Features
| Feature | Design Value |
|---|---|
| BiAs-mode clamping | Distinct forward (≤4.5 V) and reverse (≤12.3 V) clamping enables optimized protection for asymmetric signal swings like UART or CAN. |
| AEC-Q101 qualified | Qualified per automotive stress test standard - validated for temperature cycling, humidity, mechanical shock, and ESD robustness. |
| e3 Sn termination | Lead (Pb)-free, RoHS-compliant matte tin plating ensures solderability and long-term intermetallic stability in high-reliability assemblies. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; eliminates bake requirements before reflow, reducing manufacturing cost and risk. |
| UL 94 V-0 molding | Flame-retardant encapsulant meets automotive and industrial safety standards for enclosure-integrated modules. |
Applications
| Automotive Infotainment Interface | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines on head unit front-panel connectors exposed to user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional ESD clamp placed between connector and USB transceiver IC, operating in BiAs mode to preserve signal integrity during normal 3.3 V differential signaling. Use Value: Prevents latch-up or damage to USB PHY while maintaining <600 pF capacitance - ensuring full-speed (480 Mbps) compliance without signal distortion. |
Use Scenario: Safeguarding analog output of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Single-line transient suppressor on 0–5 V ratiometric analog output line, referenced to system ground with minimal leakage (<100 μA at 3.3 V). Use Value: Maintains measurement accuracy by limiting clamping voltage to <12.3 V during 44 A surges - preventing ADC saturation or op-amp rail-to-rail clipping. |
| Automotive Body Control Module (BCM) | Industrial CAN FD Node Protection |
Use Scenario: Shielding LIN bus pins on door module ECUs against ESD from window switches and mirror controls. IC Role / Device Role / Timing Role: Low-capacitance (≤600 pF) unidirectional diode on LIN TX/RX lines, leveraging VRWM = 3.3 V to avoid interference with 12 V bus common-mode range. Use Value: Enables fail-safe communication after ±30 kV contact discharge - meeting ISO 10605 requirements without adding series resistance or degrading rise time. |
Use Scenario: Adding secondary ESD protection on CAN FD transceiver RX/TX pins in motor drive control units. IC Role / Device Role / Timing Role: Standoff voltage (VRWM = 3.3 V) aligns with transceiver's logic-level interface; BiAs clamping handles both positive and negative transients without polarity reversal. Use Value: Limits peak clamping to ≤12.3 V during 44 A surges - preserving transceiver functionality while supporting >5 Mbps CAN FD data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD9X3.3SFT5G | Lower capacitance (120 pF typ), same VRWM (3.3 V), lower PPPM (300 W), SOD-523 package (smaller footprint, higher thermal resistance). | Better suited for ultra-high-speed interfaces (>500 Mbps) where capacitance dominates; less robust for repeated high-energy surges. | Select when board space is constrained and surge energy is limited to <300 W; verify thermal performance in sealed enclosures. |
| TPD2E001DRYR | Two-channel device in SOT-553, 3.3 V VRWM, 12 pF capacitance, 200 W PPPM, integrated 10 Ω series resistors. | Designed for dual-line protection (e.g., USB D+/D−); lower clamping but reduced surge handling; resistor integration adds signal delay. | Choose for compact dual-line protection where low capacitance and built-in current limiting are prioritized over single-line surge margin. |
Compared with VGSOT03-G3-18, ES9X3.3SFT5G trades surge robustness for size and speed, while TPD2E001DRYR offers dual-line integration at the cost of lower power handling and added series impedance - making VGSOT03-G3-18 optimal for discrete, high-energy, single-line automotive-grade protection.
Availability
VGSOT03-G3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, and body control modules requiring stable component supply with AEC-Q101 qualification and long-term production continuity.
Supply support for VGSOT03-G3-18 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability passive and protection components for automotive, industrial, and computing markets.
The VGSOTxx family was developed specifically for AEC-Q101-compliant, single-line ESD protection in space-constrained automotive and industrial PCBs - emphasizing low-leakage, high-surge capability, and BiAs-mode precision clamping.
FAQ
What is the maximum operating temperature for VGSOT03-G3-18?
The VGSOT03-G3-18 has a maximum junction temperature (TJ) of +150 °C and operates across -55 °C to +150 °C ambient. This rating supports deployment in under-hood automotive environments and industrial enclosures where sustained high temperatures occur. The SOT-23 package's thermal impedance allows reliable heat dissipation during repetitive 540 W pulse events, provided proper PCB copper area is used for pin 1 and pin 3 grounding.
Is VGSOT03-G3-18 qualified to AEC-Q101?
Yes, VGSOT03-G3-18 is AEC-Q101 qualified - confirmed in Vishay's official documentation (Document Number: 86326, Rev. 1.1). It passes all required stress tests including human body model (HBM) Class H3B (>8 kV), temperature cycling, and high-temperature operating life. This qualification validates its suitability for automotive electronic control units where long-term reliability under thermal and electrical stress is mandatory.
What does "BiAs-mode" mean for VGSOT03-G3-18?
BiAs-mode (Bidirectional Asymmetrical) means the VGSOT03-G3-18 clamps positive transients at higher voltages (up to 12.3 V) and negative transients at much lower voltages (as low as 1.0 V) due to its unidirectional structure. This asymmetry protects circuits with ground-referenced signals - like 3.3 V logic - by tightly limiting negative excursions while allowing controlled positive clamping above the supply rail, minimizing risk of downstream IC damage.
Can VGSOT03-G3-18 be used on 5 V logic lines?
No - VGSOT03-G3-18 is not recommended for 5 V logic lines because its specified VRWM is only 3.3 V and VBR starts at 4.0 V. Applying 5 V continuously would exceed its reverse stand-off rating, causing excessive leakage current (>100 μA) and potential thermal runaway. For 5 V applications, VGSOT05-G3-18 (VRWM = 5 V) is the appropriate variant in the same family.
What is the significance of the "-G3-18" suffix in VGSOT03-G3-18?
The "-G3-18" suffix indicates Green (RoHS-compliant, lead-free) packaging with Sn (e3) terminations and 18-inch reel packaging (10,000 units per reel). The "G3" denotes environmental compliance level, while "18" specifies the tape-and-reel format - distinguishing it from the 7-inch reel version (e.g., VGSOT03-G3-08). This packaging supports automated SMT assembly and meets automotive supply chain traceability requirements.
VGSOT03-G3-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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):
- 4V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 44A (8/20µs)
- Power - Peak Pulse:
- 540W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 460pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
VGSOT03-G3-18 FAQ
1.How can I place an order for VGSOT03-G3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VGSOT03-G3-18 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 VGSOT03-G3-18 reliable?
The price and inventory of VGSOT03-G3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VGSOT03-G3-18 is usually 5 days.
3.What payment methods are accepted for VGSOT03-G3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VGSOT03-G3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VGSOT03-G3-18?
VGSOT03-G3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VGSOT03-G3-18 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 VGSOT03-G3-18?
For technical support, including VGSOT03-G3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VGSOT03-G3-18 requirements.
6.How does Aetrix verify that VGSOT03-G3-18 is sourced from the original manufacturer or authorized distributors?
All VGSOT03-G3-18 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 VGSOT03-G3-18 meets industry standards.
7.What is the process for return or replacement of VGSOT03-G3-18?
All VGSOT03-G3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VGSOT03-G3-18, 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 VGSOT03-G3-18 part is unused and in its original packaging.
Return procedure for VGSOT03-G3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VGSOT03-G3-18 Tags
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