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Vishay General Semiconductor - Diodes Division VGSOT12-HG3-18
- Part No.:
- VGSOT12-HG3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
VGSOT12-HG3-18.pdf
- Description:
- TVS DIODE 12VWM 26VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,318
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Product details
Overview
VGSOT12-HG3-18 from Vishay Semiconductors is a unidirectional single-line ESD protection diode in SOT-23 package, designed for transient suppression on 12 V nominal signal/data lines. It delivers ±30 kV IEC 61000-4-2/ISO 10605 ESD immunity, 480 W peak pulse power (8/20 μs), and clamps transients to ≤26 V at 18.5 A, enabling robust protection in automotive infotainment interfaces.
For engineers reviewing the VGSOT12-HG3-18 datasheet, VGSOT12-HG3-18 pinout, VGSOT12-HG3-18 application, or VGSOT12-HG3-18 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 12 V automotive data buses and industrial I/O ports.
Technical Context
The VGSOT12-HG3-18 implements Bidirectional Asymmetrical (BiAs) protection mode: pin 1 grounded, pin 3 connected to the protected line. During positive transients, it conducts above VBR = 13.5–16.5 V; during negative transients, it clamps near ground via low VF ≤1.2 V forward conduction.
Its 115–150 pF capacitance at 0 V reverse bias and 54 pF at 6 V enables use on moderate-speed lines (e.g., CAN FD, LIN, USB 2.0 D+/D−), while its 1 μA leakage at 12 V VRWM ensures minimal impact on signal integrity and power budget in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 12 V maximum reverse working voltage - sets upper limit of normal operating voltage before clamping begins |
| VBR (min/typ/max) | 13.5 / 15 / 16.5 V at 1 mA - defines precise turn-on threshold for positive transient suppression |
| VC @ IPPM | ≤26 V at 18.5 A, 8/20 μs - maximum clamped voltage under worst-case surge, protecting downstream ICs |
| Capacitance | 115–150 pF at 0 V, 54 pF at 6 V - low enough for <10 Mbps data rates without signal distortion |
| ESD immunity | ±30 kV contact/air per IEC 61000-4-2 & ISO 10605 - exceeds Level 4 system-level ESD requirements |
| AEC-Q101 qualified | Yes - validated for automotive underhood and cabin applications with -55 °C to +150 °C junction operation |
| Package | SOT-23 - industry-standard 3-pin surface-mount footprint compatible with automated assembly and IPC-7351B land pattern |
Pinout & Package
SOT-23 package: 3-pin, gull-wing leaded plastic case; 2.9 mm × 1.3 mm × 1.01 mm body; MSL level 1; 260 °C peak reflow compatible; 9.2 mg weight; UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Ground (Anode common) | Connected directly to system ground plane; serves as return path for both positive and negative transient currents |
| Pin 2 | No connection (NC) | Internally isolated; must be left floating - no PCB trace or thermal pad connection permitted |
| Pin 3 | Protected line (Cathode) | Connected to signal/data line requiring ESD protection; clamps to ground when voltage exceeds VBR or drops below ~0 V |
Key Features
| Feature | Design Value |
|---|---|
| BiAs-mode clamping | Asymmetric forward/reverse clamping (VF ≤1.2 V / VC ≤26 V) enables tighter protection windows than symmetrical TVS diodes |
| AEC-Q101 qualification | Validated for automotive reliability including HTOL, temperature cycling, and ESD stress - suitable for ASIL-B subsystems |
| e3 Sn termination | Lead (Pb)-free, RoHS-compliant matte tin plating - eliminates whisker risk and supports Pb-free reflow profiles |
| Low leakage current | ≤1 μA at 12 V VRWM - minimizes standby power loss in battery-backed or energy-sensitive circuits |
| High surge robustness | 480 W (8/20 μs) and 44 W (10/1000 μs) peak pulse power - withstands multiple IEC 61000-4-5 surges without degradation |
Applications
| Automotive Infotainment Interface | Industrial RS-485 Node |
|---|---|
Use Scenario: Protecting HDMI, LVDS, or FPD-Link III video data lines between head unit and display in vehicles exposed to ISO 10605 ESD events. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed inline between connector and PHY IC input. Use Value: Limits clamping voltage to ≤26 V during 18.5 A surges, preventing latch-up or gate oxide damage in 12 V rail-connected SerDes receivers. |
Use Scenario: Guarding RS-485 transceiver A/B differential pair inputs in factory automation PLC I/O modules subject to cable discharge events. IC Role / Device Role / Timing Role: Line-side ESD clamp on each bus line, referenced to local ground with 12 V common-mode range. Use Value: 115–150 pF capacitance avoids signal edge degradation at 10 Mbps, while ±30 kV immunity meets IEC 61000-4-2 Level 4 compliance. |
| Automotive Body Control Module (BCM) | Medical Sensor Interface |
Use Scenario: Safeguarding LIN bus slave nodes (e.g., door module sensors) against ESD coupling from nearby switches and actuators. IC Role / Device Role / Timing Role: Single-diode ESD protector on LIN signal line, installed adjacent to connector with short ground path. Use Value: 1 μA leakage at 12 V VRWM preserves battery life in always-on LIN nodes; AEC-Q101 qualification ensures long-term field reliability. |
Use Scenario: Shielding analog front-end inputs of portable patient monitors from ESD during clinical handling or cable attachment. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on sensor signal path (e.g., thermistor, pressure bridge output). Use Value: 54 pF capacitance at 6 V bias prevents loading of high-impedance sensor outputs; ±30 kV air discharge rating covers clinical ESD risks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF12A (ON Semiconductor) | Higher clamping voltage (VC ≤30 V @ 15.5 A); 200 pF capacitance at 0 V; not AEC-Q101 qualified | Less suitable for high-speed or automotive-critical lines due to higher capacitance and lack of automotive qualification | Select VGSOT12-HG3-18 where AEC-Q101 compliance, lower capacitance, and tighter clamping are required. |
| TPD2E001DRYR (Texas Instruments) | Lower VRWM (5 V); dual-channel; 10 pF capacitance; integrated ESD protection for high-speed USB | Designed for 5 V logic-level interfaces (e.g., USB 2.0), not 12 V automotive buses | Choose VGSOT12-HG3-18 for 12 V nominal systems; TPD2E001DRYR only fits sub-6 V applications with ultra-low capacitance needs. |
Compared with SMF12A and TPD2E001DRYR, the VGSOT12-HG3-18 uniquely balances 12 V VRWM, AEC-Q101 qualification, 115–150 pF capacitance, and ≤26 V clamping - making it optimal for automotive and industrial 12 V data lines where reliability and signal fidelity are jointly critical.
Availability
VGSOT12-HG3-18 is available at Aetrix Electronics and suitable for automotive infotainment interfaces, industrial RS-485 nodes, and medical sensor signal conditioning requiring stable component supply across production lifecycles.
Supply support for VGSOT12-HG3-18 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with leadership in reliability-tested protection devices.
The VGSOT family was engineered specifically for high-reliability unidirectional ESD protection in automotive and industrial environments, emphasizing AEC-Q101 compliance, BiAs clamping precision, and SOT-23 manufacturability.
FAQ
What is the exact reverse stand-off voltage (VRWM) of the VGSOT12-HG3-18?
The VGSOT12-HG3-18 has a maximum reverse working voltage (VRWM) of 12 V, meaning it remains non-conductive up to this DC or steady-state AC voltage level on the protected line. This value is confirmed in the "ELECTRICAL CHARACTERISTICS VGSOT12" table on page 6 of Vishay document 86326, where VRWM is specified as "– – 12 V" with test condition IR = 1 μA.
Is the VGSOT12-HG3-18 qualified to AEC-Q101, and what does that mean for automotive use?
Yes, the VGSOT12-HG3-18 is AEC-Q101 qualified, as stated in the "FEATURES" section and "PACKAGE DATA" table of Vishay document 86326. This qualification validates performance across temperature cycling, high-temperature operating life, and ESD stress - confirming suitability for automotive cabin and under-hood applications where junction temperatures reach −55 °C to +150 °C.
How does the BiAs-mode operation of the VGSOT12-HG3-18 differ from standard TVS diodes?
BiAs-mode (Bidirectional Asymmetrical) means the VGSOT12-HG3-18 clamps positive transients above VBR ≈15 V to ground (reverse conduction), while negative transients are clamped near 0 V via low forward voltage (VF ≤1.2 V). Unlike symmetrical TVS diodes, this asymmetry allows tighter protection windows on 12 V rails without risking forward conduction during normal operation.
What is the capacitance of the VGSOT12-HG3-18, and how does it affect high-speed signal lines?
The VGSOT12-HG3-18 exhibits 115–150 pF capacitance at 0 V reverse bias and 54 pF at 6 V, per the "ELECTRICAL CHARACTERISTICS VGSOT12" table. This low, voltage-dependent capacitance minimizes signal rise-time degradation and jitter on lines up to 10 Mbps (e.g., LIN, CAN FD, RS-485), avoiding the bandwidth limitations seen with higher-capacitance protectors.
Can the VGSOT12-HG3-18 be used in place of a bidirectional ESD diode?
No - the VGSOT12-HG3-18 is unidirectional and requires correct polarity: pin 1 to ground, pin 3 to the protected line. Using it in reverse or substituting for a bidirectional device (e.g., VGSOT12-B) would leave negative transients unprotected. Its BiAs behavior relies on intentional asymmetry, not bidirectional symmetry.
VGSOT12-HG3-18 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):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 18.5A (8/20µs)
- Power - Peak Pulse:
- 480W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 115pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
VGSOT12-HG3-18 FAQ
1.How can I place an order for VGSOT12-HG3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VGSOT12-HG3-18 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 VGSOT12-HG3-18 reliable?
The price and inventory of VGSOT12-HG3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VGSOT12-HG3-18 is usually 5 days.
3.What payment methods are accepted for VGSOT12-HG3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VGSOT12-HG3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VGSOT12-HG3-18?
VGSOT12-HG3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VGSOT12-HG3-18 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 VGSOT12-HG3-18?
For technical support, including VGSOT12-HG3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VGSOT12-HG3-18 requirements.
6.How does Aetrix verify that VGSOT12-HG3-18 is sourced from the original manufacturer or authorized distributors?
All VGSOT12-HG3-18 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 VGSOT12-HG3-18 meets industry standards.
7.What is the process for return or replacement of VGSOT12-HG3-18?
All VGSOT12-HG3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VGSOT12-HG3-18, 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 VGSOT12-HG3-18 part is unused and in its original packaging.
Return procedure for VGSOT12-HG3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VGSOT12-HG3-18 Tags
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