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Vishay General Semiconductor - Diodes Division VGSOT08C-G3-18
- Part No.:
- VGSOT08C-G3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
VGSOT08C-G3-18.pdf
- Description:
- TVS DIODE 8VWM 19.2VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,610
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Product details
Overview
VGSOT08C-G3-18 from Vishay Semiconductors is a two-line unidirectional ESD protection diode in SOT-23 package, featuring common-anode dual-channel configuration, 8 V max reverse working voltage (VRWM), ±30 kV IEC 61000-4-2 ESD immunity, and 500 W peak pulse power (8/20 μs). It protects high-speed data lines such as USB 2.0 and HDMI interfaces against electrostatic discharge.
For engineers reviewing the VGSOT08C-G3-18 datasheet, VGSOT08C-G3-18 pinout, VGSOT08C-G3-18 application, or VGSOT08C-G3-18 equivalent, key selection criteria include clamping voltage at 28 A (14.4–18 V), low 175–250 pF line capacitance at 0 V, AEC-Q101 qualification, e3 Sn termination, and dual-mode BiAs/BiSy operation capability.
Technical Context
The VGSOT08C-G3-18 implements a dual-diode common-anode structure enabling BiAs-mode (bidirectional asymmetrical) protection for two independent signal lines referenced to ground (pins 1 & 2 to lines, pin 3 to GND), with distinct forward (≤3.2 V @ 28 A) and reverse (≤18 V @ 28 A) clamping behavior. Its design supports transient suppression per IEC 61000-4-2, ISO 10605, and IEC 61000-4-5 standards.
In BiSy-mode (single-line bidirectional symmetrical), pins 1 and 2 form a series-connected pair with pin 3 floating, delivering matched ±18.5 V clamping (at 28 A) and 87–125 pF capacitance - optimized for balanced analog or differential bus protection where polarity symmetry is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 8 V maximum reverse working voltage - sets upper limit of normal operating voltage before conduction begins on protected lines. |
| VBR (min) | 9 V reverse breakdown voltage at 1 mA - ensures reliable turn-on during overvoltage events above system rail. |
| VC @ IPPM | 14.4–18 V clamping voltage at 28 A (8/20 μs) - defines worst-case voltage seen by downstream ICs during surge. |
| CD @ 0 V | 175–250 pF capacitance at 0 V reverse bias - impacts signal integrity on high-speed interfaces like USB 2.0 (480 Mbps). |
| ESD immunity | ±30 kV contact/air discharge per IEC 61000-4-2 and ISO 10605 - exceeds Level 4 industrial ESD requirements. |
| PPPM (8/20 μs) | 500 W peak pulse power - determines energy-handling capacity for lightning-induced surges and system-level transients. |
| TJ max | 150 °C maximum junction temperature - enables operation in under-hood automotive and industrial environments. |
Pinout & Package
SOT-23 package (JEDEC TO-236AB), 3-pin, surface-mount, green molding compound, MSL level 1, 9.2 mg weight, UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Connects to first protected signal line (L1); forms one half of dual-channel ESD path to ground. |
| Pin 2 | Anode of Diode 2 | Connects to second protected signal line (L2); shares cathode (pin 3) with Diode 1 for common-anode topology. |
| Pin 3 | Common Cathode | Must be connected to system ground; provides return path for both ESD current paths in BiAs mode. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line BiAs protection | Enables simultaneous, independent protection of two signal lines (e.g., D+ and D−) with asymmetric clamping for optimal system-level robustness. |
| BiSy single-line mode | Supports bidirectional symmetrical clamping (pins 1–2, pin 3 open) for legacy RS-485 or CAN FD buses requiring matched positive/negative response. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment and body electronics, with H3B-class ESD (>8 kV HBM) and extended temperature range. |
| e3 Sn termination | Lead-free, matte tin plating ensures RoHS compliance and solderability compatibility with standard reflow profiles (peak ≤260 °C). |
| Low leakage current | ≤5 μA at 8 V VR - minimizes standby power loss and avoids false triggering in battery-powered sensor nodes. |
Applications
| USB 2.0 Interface Protection | HDMI Data Lane Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host port against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Two-line unidirectional ESD clamp placed directly at connector, with common cathode grounded. Use Value: Limits clamped voltage to ≤18 V at 28 A surge, preserving USB PHY integrity while maintaining <250 pF total line capacitance for 480 Mbps signaling. | Use Scenario: Safeguarding TMDS data channels (clock and data pairs) in HDMI 1.4 receivers against contact discharge near external ports. IC Role / Device Role / Timing Role: Dual-channel ESD suppressor deployed per differential pair, leveraging BiAs mode for independent line control. Use Value: Delivers ±30 kV ESD immunity without degrading signal rise/fall times, thanks to 175–250 pF capacitance and sub-1 ns response time. |
| Automotive Infotainment Display Link | Industrial RS-485 Transceiver Protection |
Use Scenario: Shielding FPD-Link III or similar high-speed video links between head unit and display in automotive cockpits. IC Role / Device Role / Timing Role: Common-anode dual-diode configured in BiAs mode to protect two serialized video lanes referenced to chassis ground. Use Value: AEC-Q101 qualification and 150 °C TJ max ensure reliability across thermal cycles; 8 V VRWM matches typical 7–9 V supply rails in display modules. | Use Scenario: Adding secondary ESD protection ahead of isolated RS-485 transceivers in factory automation gateways. IC Role / Device Role / Timing Role: Repurposed in BiSy mode (pins 1–2 active, pin 3 open) to provide symmetrical ±18.5 V clamping on A/B differential lines. Use Value: Matches RS-485 common-mode range while reducing board area vs. discrete dual-diode solutions; 87–125 pF capacitance avoids data rate derating at 20 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J8.0A | Single-line, 8.0 V VRWM, 600 W PPPM (8/20 μs), DO-214AC package, higher 1.5 nF capacitance. | Requires two devices for dual-line protection; unsuitable for space-constrained USB/HDMI layouts. | Select when higher surge rating is needed and board area is not constrained; not a drop-in replacement. |
| TPD2E001DRYR | Two-line, 5.5 V VRWM, 300 W PPPM, 15 pF CD @ 0 V, 6-pin SOT-563 package, integrated 10 Ω series resistors. | Lower VRWM limits use to 3.3 V systems; lower capacitance benefits >1 Gbps interfaces but reduces ESD margin. | Prefer for high-speed digital interfaces (e.g., MIPI D-PHY) where ultra-low capacitance outweighs reduced voltage headroom. |
Compared with SMA6J8.0A and TPD2E001DRYR, the VGSOT08C-G3-18 uniquely balances dual-line integration, 8 V VRWM headroom for 5 V systems, moderate 175–250 pF capacitance, and AEC-Q101 qualification - making it optimal for cost-sensitive, space-limited automotive and industrial data line protection.
Availability
VGSOT08C-G3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI data lane safeguarding, and automotive infotainment display link applications requiring stable component supply and long-term lifecycle support.
Supply support for VGSOT08C-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 diodes, MOSFETs, optoelectronics, and protection devices with emphasis on reliability and AEC-Q qualification.
The VGSOTxxC family was designed specifically for compact, high-efficiency ESD protection of high-speed data lines in automotive, industrial, and consumer electronics - combining dual-channel integration, BiAs/BiSy flexibility, and robust transient handling.
FAQ
What is the maximum reverse working voltage (VRWM) of the VGSOT08C-G3-18?
The VGSOT08C-G3-18 has a maximum reverse working voltage (VRWM) of 8 V, meaning it remains non-conductive up to this DC or steady-state AC voltage on protected signal lines. This value is confirmed in the "ELECTRICAL CHARACTERISTICS VGSOT08C" table on page 6 of Vishay document 86325, where VRWM is specified as "– – 8 V" with test condition "At IR = 5 μA". Exceeding 8 V risks premature conduction and signal distortion.
How does the VGSOT08C-G3-18 support both BiAs and BiSy protection modes?
The VGSOT08C-G3-18 supports BiAs (bidirectional asymmetrical) mode with pin 3 grounded and pins 1 & 2 connected to separate signal lines - delivering different forward (<3.2 V) and reverse (<18 V) clamping. For BiSy (bidirectional symmetrical) mode, pin 3 is left unconnected while pins 1 and 2 form a series path, yielding matched ±18.5 V clamping. Both configurations are explicitly detailed in sections "BiAs-MODE" (page 5) and "BiSy-MODE" (page 9) of the VGSOT03C–VGSOT36C datasheet.
Is the VGSOT08C-G3-18 qualified for automotive applications?
Yes, the VGSOT08C-G3-18 is AEC-Q101 qualified, as stated in the "FEATURES" section (page 1) and confirmed in the "PACKAGE DATA" table (page 2) of Vishay document 86325. It meets human body model (HBM) Class H3B (>8 kV), operates from −55 °C to +150 °C, and is rated for under-hood and infotainment use. The "G3" suffix denotes green, lead-free, and AEC-Q101-compliant packaging per Vishay's ordering conventions.
What is the typical capacitance of the VGSOT08C-G3-18 at 0 V reverse bias?
The typical capacitance of the VGSOT08C-G3-18 at 0 V reverse bias and 1 MHz is 175–250 pF, as specified in the "ELECTRICAL CHARACTERISTICS VGSOT08C" table (page 6, parameter CD). This value applies to BiAs mode (pins 1–3 and 2–3 paths) and directly impacts high-speed signal integrity - for example, limiting usable trace length on USB 2.0 D+/D− lines to maintain eye diagram compliance.
Can the VGSOT08C-G3-18 be used to protect a single differential pair like RS-485?
Yes, the VGSOT08C-G3-18 can protect a single RS-485 differential pair using BiSy mode: connect pin 1 to line A, pin 2 to line B, and leave pin 3 unconnected. In this configuration, it delivers symmetrical ±18.5 V clamping (at 28 A, 8/20 μs) and 87–125 pF capacitance, as documented on page 10 of the datasheet. This avoids the need for two discrete diodes while preserving common-mode noise rejection and meeting IEC 61000-4-2 Level 4 requirements.
VGSOT08C-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:
- 2
- 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:
- General Purpose
- Capacitance @ Frequency:
- 175pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
VGSOT08C-G3-18 FAQ
1.How can I place an order for VGSOT08C-G3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VGSOT08C-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 VGSOT08C-G3-18 reliable?
The price and inventory of VGSOT08C-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 VGSOT08C-G3-18 is usually 5 days.
3.What payment methods are accepted for VGSOT08C-G3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VGSOT08C-G3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VGSOT08C-G3-18?
VGSOT08C-G3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VGSOT08C-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 VGSOT08C-G3-18?
For technical support, including VGSOT08C-G3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VGSOT08C-G3-18 requirements.
6.How does Aetrix verify that VGSOT08C-G3-18 is sourced from the original manufacturer or authorized distributors?
All VGSOT08C-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 VGSOT08C-G3-18 meets industry standards.
7.What is the process for return or replacement of VGSOT08C-G3-18?
All VGSOT08C-G3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VGSOT08C-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 VGSOT08C-G3-18 part is unused and in its original packaging.
Return procedure for VGSOT08C-G3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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