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Vishay General Semiconductor - Diodes Division GSOT08C-G3-18
- Part No.:
- GSOT08C-G3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT08C-G3-18.pdf
- Description:
- TVS DIODE 8VWM 19.2VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,228
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Product details
Overview
GSOT08C-G3-18 from Vishay Semiconductors is a two-line bidirectional asymmetrical ESD protection diode in SOT-23 package, rated for 8 V reverse stand-off voltage (VRWM), ±30 kV IEC 61000-4-2 ESD immunity, and 18 A peak pulse current (IPPM). It protects high-speed data lines such as USB 2.0 or HDMI interfaces against transient overvoltage events.
For engineers reviewing the GSOT08C-G3-18 datasheet, GSOT08C-G3-18 pinout, GSOT08C-G3-18 application, or GSOT08C-G3-18 equivalent, key selection factors include its 160–250 pF capacitance at 0 V, 15.2 V clamping voltage at 18 A, BiAs-mode dual-line operation, and AEC-Q101 qualification for automotive signal line protection.
Technical Context
The GSOT08C-G3-18 implements BiAs-MODE (Bidirectional Asymmetrical) protection: pins 1 and 2 connect to protected signal lines, pin 3 to ground, enabling independent clamping of positive transients (via reverse-biased diodes) and negative transients (via forward conduction). Its asymmetry yields lower forward clamping (~3 V at 18 A) versus reverse clamping (~15.2 V).
It supports BiSy-MODE (single-line symmetrical) operation when pin 3 is left unconnected and pins 1–2 form a differential pair across one signal line and ground - delivering matched ±18.5 V clamping at 18 A with 80–125 pF capacitance, suitable for RS-485 or CAN bus stubs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protection Type | Two-line bidirectional asymmetrical (BiAs) or single-line bidirectional symmetrical (BiSy) |
| Reverse Stand-off Voltage (VRWM) | 8 V - maximum continuous operating voltage before clamping begins on data lines |
| Peak Pulse Current (IPPM) | 18 A - surge handling capability per path under IEC 61000-4-5 8/20 μs waveform |
| Clamping Voltage (VC) | 15.2 V at 18 A - maximum voltage seen by protected IC during worst-case surge |
| Capacitance (CD) | 160–250 pF at 0 V - low enough for USB 2.0 (480 Mbps) without signal integrity degradation |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 system-level ESD requirements |
| Operating Temperature | −55 °C to +150 °C - qualified for under-hood automotive and industrial environments |
Pinout & Package
SOT-23 package: 3-pin, surface-mount, e3 Sn-plated, MSL level 1, 2.8 × 2.35 × 1.15 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Line 1 Anode/Cathode | Connects to first protected signal line (L1); forms one half of BiAs protection path to ground (pin 3) |
| Pin 2 | Line 2 Anode/Cathode | Connects to second protected signal line (L2); forms second half of BiAs protection path to ground (pin 3) |
| Pin 3 | Ground Reference | Must be connected to system ground in BiAs mode; left floating in BiSy mode |
Key Features
| Feature | Design Value |
|---|---|
| BiAs-MODE Dual-Line Protection | Enables simultaneous protection of two independent data lines (e.g., D+ and D−) with shared ground reference and minimal board area |
| Low Forward Clamping | 3 V max at 18 A - minimizes negative transient overshoot on sensitive CMOS inputs |
| AEC-Q101 Qualified | Validated for automotive applications including infotainment and body electronics per stress test requirements |
| Green RoHS Compliance | e3 Sn plating and halogen-free molding compound meet global environmental regulations without compromising solderability |
| MSL Level 1 Rating | Unlimited floor life at ≤30 °C/60 % RH - eliminates bake requirements prior to reflow assembly |
Applications
| USB 2.0 Interface Protection | HDMI Data Lane Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host port from ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Two-line asymmetrical transient voltage suppressor placed directly at connector, shunting surges to chassis ground. Use Value: 160–250 pF capacitance avoids signal rise-time degradation at 480 Mbps; ±30 kV ESD rating ensures robustness in consumer-facing ports. | Use Scenario: Safeguarding TMDS data channels (0/1/2) in HDMI source devices against contact discharge during hot-plug events. IC Role / Device Role / Timing Role: Per-channel BiAs clamp between each differential pair and ground, maintaining common-mode noise rejection. Use Value: 8 V VRWM aligns with HDMI DC bias levels; 15.2 V clamping prevents damage to 3.3 V receiver inputs during 15 kV ESD strikes. |
| Automotive LIN Bus Node | Industrial RS-485 Stub Protection |
Use Scenario: Adding ESD resilience to LIN transceiver I/O pins in automotive door modules exposed to service technician handling. IC Role / Device Role / Timing Role: Single-line BiSy configuration (pins 1–2 across LIN and ground) providing symmetrical clamping on the bidirectional bus. Use Value: −55 °C to +150 °C operation supports engine bay mounting; AEC-Q101 qualification ensures reliability in automotive lifecycle testing. | Use Scenario: Protecting RS-485 transceiver inputs on factory-floor PLC I/O modules subject to long cable runs and lightning-induced surges. IC Role / Device Role / Timing Role: BiSy-mode placement across A/B lines and ground, leveraging 18 A IPPM to absorb induced 8/20 μs transients. Use Value: 80–125 pF capacitance preserves signal edge integrity at 10 Mbps; 18.5 V clamping stays below RS-485 receiver absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT08C-G3-18 | Successor series with identical SOT-23 footprint, same VRWM (8 V), but improved 20 A IPPM and lower 14.5 V clamping at 18 A | Drop-in replacement for new designs; requires validation for legacy PCBs due to tighter clamping tolerance | Select for higher surge margin and extended product lifecycle beyond January 2025 EOL date |
| SMF08CTHE3_A/H | Single-line SOD-123 package; 8 V VRWM, 20 A IPPM, 15.5 V VC at 18 A; no BiAs capability | Requires two devices for dual-line protection; larger board area; not suitable for space-constrained USB layouts | Choose when only single-line protection is needed or when SOD-123 is already standardized in BOM |
Compared with VGSOT08C-G3-18, the original GSOT08C-G3-18 offers proven field reliability but reaches end-of-life in January 2025; SMF08CTHE3_A/H provides higher surge rating but lacks integrated dual-line functionality and increases component count.
Availability
GSOT08C-G3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive LIN bus nodes, and industrial RS-485 stub protection requiring stable component supply through its scheduled end-of-life window.
Supply support for GSOT08C-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 power management, sensing, and circuit protection components with emphasis on reliability and automotive-grade qualification.
The GSOTxxC family was designed specifically for high-density, low-capacitance ESD protection of high-speed serial interfaces in automotive, industrial, and consumer electronics - balancing clamping performance, board space, and manufacturability.
FAQ
What is the maximum operating temperature range for the GSOT08C-G3-18?
The GSOT08C-G3-18 operates reliably from −55 °C to +150 °C, meeting AEC-Q101 requirements for under-hood automotive applications and harsh industrial environments. This wide junction temperature range ensures consistent clamping behavior across thermal extremes without derating.
Can the GSOT08C-G3-18 protect both USB D+ and D− lines simultaneously?
Yes, the GSOT08C-G3-18 supports BiAs-MODE operation where pins 1 and 2 connect to D+ and D− respectively, and pin 3 connects to ground. This configuration provides independent, low-capacitance clamping for both lines using a single SOT-23 device - reducing component count and PCB area versus discrete solutions.
What is the clamping voltage of the GSOT08C-G3-18 at its rated peak pulse current?
At its rated 18 A peak pulse current (IPPM), the GSOT08C-G3-18 delivers a maximum reverse clamping voltage (VC) of 19.2 V and a forward clamping voltage (VF) of 3 V. These values are measured per IEC 61000-4-5 8/20 μs waveform and define the worst-case voltage imposed on protected circuitry during surge events.
Is the GSOT08C-G3-18 RoHS-compliant and lead-free?
Yes, the GSOT08C-G3-18 carries the "G3" suffix indicating green RoHS-compliant construction with matte tin (e3) plating and halogen-free molding compound. It meets JEDEC J-STD-020 MSL level 1 requirements and is compatible with standard Pb-free reflow profiles up to 260 °C peak temperature.
What is the end-of-life timeline for the GSOT08C-G3-18, and what is the recommended alternative?
Vishay has announced end-of-life for the GSOT08C-G3-18 in January 2025, with VGSOT08C-G3-18 designated as the direct successor. The VGSOT08C-G3-18 maintains pin-to-pin compatibility, identical SOT-23 package, and improved electrical specs including 20 A IPPM and lower clamping voltage - making it the preferred migration path for new designs.
GSOT08C-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:
- Last Time Buy
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V (Max)
- Voltage - Breakdown (Min):
- 9V
- Voltage - Clamping (Max) @ Ipp:
- 19.2V
- Current - Peak Pulse (10/1000µs):
- 18A (8/20µs)
- Power - Peak Pulse:
- 345W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 160pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT08C-G3-18 FAQ
1.How can I place an order for GSOT08C-G3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT08C-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 GSOT08C-G3-18 reliable?
The price and inventory of GSOT08C-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 GSOT08C-G3-18 is usually 5 days.
3.What payment methods are accepted for GSOT08C-G3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT08C-G3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT08C-G3-18?
GSOT08C-G3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT08C-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 GSOT08C-G3-18?
For technical support, including GSOT08C-G3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT08C-G3-18 requirements.
6.How does Aetrix verify that GSOT08C-G3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT08C-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 GSOT08C-G3-18 meets industry standards.
7.What is the process for return or replacement of GSOT08C-G3-18?
All GSOT08C-G3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT08C-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 GSOT08C-G3-18 part is unused and in its original packaging.
Return procedure for GSOT08C-G3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT08C-G3-18 Tags
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