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Vishay General Semiconductor - Diodes Division VGSOT08-HG3-18
- Part No.:
- VGSOT08-HG3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
VGSOT08-HG3-18.pdf
- Description:
- TVS DIODE 8VWM 19.2VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
VGSOT08-HG3-18 from Vishay Semiconductors is a unidirectional single-line ESD protection diode in SOT-23 package, designed for data line protection in automotive and industrial interfaces. It features 8 V reverse stand-off voltage (VRWM), ±30 kV IEC 61000-4-2 ESD immunity, 500 W peak pulse power (8/20 μs), 28 A peak pulse current, and 175–250 pF capacitance at 0 V bias - enabling robust transient suppression with low signal distortion in USB 2.0, CAN FD, and sensor interface applications.
For engineers reviewing the VGSOT08-HG3-18 datasheet, VGSOT08-HG3-18 pinout, VGSOT08-HG3-18 application, or VGSOT08-HG3-18 equivalent, this page delivers verified electrical parameters, BiAs-mode clamping behavior, AEC-Q101 qualification status, SOT-23 terminal mapping, and real-world use cases for high-reliability ESD hardening of 5–12 V signal paths.
Technical Context
The VGSOT08-HG3-18 implements Bidirectional Asymmetrical (BiAs) protection mode: pin 1 grounded, pin 3 connected to the protected line. During positive transients exceeding 9–11 V breakdown (VBR), it conducts to ground with clamping voltage ≤18 V at 28 A; negative transients are clamped near 0 V via low forward voltage (VF ≤ 3.2 V at 28 A).
Its design targets IEC 61000-4-2 (±30 kV contact/air) and ISO 10605 compliance, supports AEC-Q101 qualification (H3B-class ESD >8 kV HBM), and operates across –55 °C to +150 °C junction temperature. The SOT-23 package enables compact placement adjacent to connectors or IC I/O pins without compromising layout integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 8 V - maximum continuous reverse working voltage before leakage exceeds 5 μA; sets upper limit for safe DC bias on protected line |
| VBR (min/typ/max) | 9 / 10 / 11 V at 1 mA - defines onset of avalanche conduction; ensures reliable triggering above system operating voltage |
| VC @ 28 A (8/20 μs) | ≤18 V - peak clamping voltage during worst-case surge; limits stress on downstream IC I/O structures |
| Capacitance @ 0 V | 175–250 pF - directly impacts signal rise time and bandwidth; suitable for ≤480 Mbps interfaces like USB 2.0 |
| ESD immunity | ±30 kV (IEC 61000-4-2 & ISO 10605) - meets automotive and industrial ESD test requirements without external circuitry |
| PPPM (8/20 μs) | 500 W - energy-handling capacity for short-duration surges per IEC 61000-4-5; supports robust front-end protection |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and thermally constrained industrial enclosures |
Pinout & Package
SOT-23 package: 3-pin, surface-mount, gull-wing leads; 9.2 mg weight; UL 94 V-0 molding compound; MSL level 1 (JEDEC J-STD-020); peak reflow ≤260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Ground (Anode connection) | Low-inductance return path for ESD current; must be tied to solid system ground plane with minimal trace length |
| Pin 2 | No internal connection | Electrically isolated; no PCB routing or thermal pad required; serves mechanical support only |
| Pin 3 | Protected line (Cathode connection) | Connected directly to I/O line (e.g., CAN_H, USB_D+, sensor output); clamps transients to ground via BiAs action |
Key Features
| Feature | Design Value |
|---|---|
| BiAs-mode clamping | Asymmetric forward/reverse clamping (VF ≤ 3.2 V / VC ≤ 18 V) minimizes ground bounce and preserves signal integrity during bidirectional transients |
| AEC-Q101 qualified | Qualified for automotive applications including engine control, body electronics, and ADAS sensor interfaces requiring H3B-class ESD immunity |
| e3 Sn termination | Lead (Pb)-free, matte tin plating ensures RoHS compliance and solderability stability across multiple reflow cycles |
| Low leakage at VRWM | IR ≤ 5 μA at 8 V reverse bias prevents loading of high-impedance sensor or communication lines during normal operation |
| Thermal robustness | Junction-to-lead thermal impedance supports sustained power dissipation in confined layouts; rated for continuous operation up to +150 °C TJ |
Applications
| Automotive Sensor Interface | Industrial CAN FD Bus |
|---|---|
|
Use Scenario: Protecting analog output of pressure/temperature sensors in engine bay modules exposed to ISO 10605 ESD events. IC Role / Device Role / Timing Role: Unidirectional ESD clamp placed between sensor output and microcontroller ADC input. Use Value: Maintains <5 μA leakage at 8 V bias to avoid signal offset error while clamping ±30 kV discharges to ≤18 V at 28 A. |
Use Scenario: Front-end protection for CAN FD transceivers in factory automation controllers subjected to IEC 61000-4-2 contact discharge. IC Role / Device Role / Timing Role: Single-line BiAs protector on CAN_H line, grounded at Pin 1, with minimal added capacitance. Use Value: 175–250 pF capacitance at 0 V preserves >2 Mbps CAN FD signal integrity; 500 W pulse rating handles bus fault surges. |
| USB 2.0 Data Line | Smart Meter Communication Port |
|
Use Scenario: ESD hardening of D+ and D− lines in portable diagnostic tools compliant with USB IF specifications. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on each data line, leveraging SOT-23 footprint for space-constrained designs. Use Value: Clamping voltage ≤18 V at 28 A prevents damage to USB PHY; 250 pF max capacitance avoids signal edge degradation at 480 Mbps. |
Use Scenario: Protecting RS-485/MBus physical layer in utility smart meters installed in electrically noisy substations. IC Role / Device Role / Timing Role: Point-of-entry ESD suppressor on differential pair, grounded to meter chassis ground. Use Value: AEC-Q101 qualification ensures long-term reliability in field-deployed meters; ±30 kV immunity exceeds IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A | DO-214AC package; higher VRWM (8.0 V), but larger footprint (4.5 × 3.9 mm vs. SOT-23's 2.9 × 1.3 mm) and 600 pF capacitance | Less suitable for high-speed interfaces due to higher capacitance; better for power rail protection where size is less critical | Select VGSOT08-HG3-18 when board space and signal integrity are constrained; choose SMAJ8.0A for cost-sensitive, lower-frequency applications |
| TPD2E001DRYR | 2-channel bidirectional array in SOT-5X3; 5.5 V VRWM; 12 pF capacitance; integrated ESD protection for USB D+/D− pairs | Designed specifically for differential high-speed data; not a drop-in replacement for single-line unidirectional use | VGSOT08-HG3-18 provides higher VRWM and superior surge handling for 8 V systems; TPD2E001DRYR suits dual-line, low-capacitance USB 2.0 needs |
Compared with SMAJ8.0A and TPD2E001DRYR, VGSOT08-HG3-18 uniquely balances 8 V stand-off, 250 pF max capacitance, SOT-23 miniaturization, and AEC-Q101 qualification - making it optimal for space-limited, high-reliability unidirectional signal line protection in automotive and industrial settings.
Availability
VGSOT08-HG3-18 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN FD networks, USB 2.0 peripheral designs, and smart meter communication ports requiring stable component supply and long-term lifecycle assurance.
Supply support for VGSOT08-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 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 to deliver AEC-Q101-qualified, low-capacitance ESD protection in miniature SOT-23 packages for next-generation vehicle electronics and ruggedized industrial interfaces.
FAQ
What is the maximum reverse working voltage (VRWM) of the VGSOT08-HG3-18?
The VGSOT08-HG3-18 has a maximum reverse working voltage (VRWM) of 8 V, verified per Vishay's Electrical Characteristics table for VGSOT08. At this voltage, reverse leakage current remains ≤5 μA, ensuring minimal loading of protected signal lines during normal operation. This value is fixed for the VGSOT08 variant and confirmed in the Rev. 1.1 datasheet (Document Number: 86326).
Is the VGSOT08-HG3-18 AEC-Q101 qualified?
Yes, the VGSOT08-HG3-18 is AEC-Q101 qualified and rated for H3B-class human body model ESD (>8 kV). This qualification is explicitly stated in the Vishay datasheet under "FEATURES" and "ABSOLUTE MAXIMUM RATINGS", confirming its suitability for automotive applications including engine control units and ADAS sensor modules.
What is the clamping voltage of the VGSOT08-HG3-18 at 28 A (8/20 μs)?
The VGSOT08-HG3-18 clamps to ≤18 V at 28 A peak pulse current (8/20 μs waveform), as specified in the "ELECTRICAL CHARACTERISTICS VGSOT08" table. This value represents the maximum voltage seen by downstream circuitry during worst-case surge events and is critical for ensuring compatibility with 3.3 V or 5 V logic I/O tolerances.
Does the VGSOT08-HG3-18 support bidirectional ESD protection?
The VGSOT08-HG3-18 implements Bidirectional Asymmetrical (BiAs) protection: it clamps positive transients above ~10 V to ground (reverse mode) and negative transients near 0 V via forward conduction (forward mode). While functionally bidirectional, its clamping levels differ - hence "asymmetrical" - and it is classified as a unidirectional device per datasheet labeling.
What is the capacitance of the VGSOT08-HG3-18 at 0 V bias?
The VGSOT08-HG3-18 exhibits a typical capacitance of 175–250 pF at 0 V reverse bias and 1 MHz frequency, per the "ELECTRICAL CHARACTERISTICS VGSOT08" table. This value decreases to ≤30 pF at 4 V bias, enabling effective high-speed signal line protection without excessive bandwidth limitation.
VGSOT08-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):
- 8V (Max)
- Voltage - Breakdown (Min):
- 9V
- Voltage - Clamping (Max) @ Ipp:
- 18V
- Current - Peak Pulse (10/1000µs):
- 28A (8/20µs)
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 175pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
VGSOT08-HG3-18 FAQ
1.How can I place an order for VGSOT08-HG3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VGSOT08-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 VGSOT08-HG3-18 reliable?
The price and inventory of VGSOT08-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 VGSOT08-HG3-18 is usually 5 days.
3.What payment methods are accepted for VGSOT08-HG3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VGSOT08-HG3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VGSOT08-HG3-18?
VGSOT08-HG3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VGSOT08-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 VGSOT08-HG3-18?
For technical support, including VGSOT08-HG3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VGSOT08-HG3-18 requirements.
6.How does Aetrix verify that VGSOT08-HG3-18 is sourced from the original manufacturer or authorized distributors?
All VGSOT08-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 VGSOT08-HG3-18 meets industry standards.
7.What is the process for return or replacement of VGSOT08-HG3-18?
All VGSOT08-HG3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VGSOT08-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 VGSOT08-HG3-18 part is unused and in its original packaging.
Return procedure for VGSOT08-HG3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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