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Vishay General Semiconductor - Diodes Division GSOT12C-G3-08
- Part No.:
- GSOT12C-G3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT12C-G3-08.pdf
- Description:
- TVS DIODE 12VWM 26VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:21,023
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Product details
Overview
GSOT12C-G3-08 from Vishay Semiconductors is a two-line bidirectional asymmetrical ESD protection diode in SOT-23 package, rated for ±30 kV IEC 61000-4-2 contact/air discharge, 12 V reverse stand-off voltage (VRWM), and 12 A peak pulse current (IPPM) per line-to-ground path. It delivers 21.2 V max clamping voltage at 12 A for data-line protection in USB 2.0, HDMI, and industrial I/O interfaces.
For engineers reviewing the GSOT12C-G3-08 datasheet, GSOT12C-G3-08 pinout, GSOT12C-G3-08 application, or GSOT12C-G3-08 equivalent, key selection criteria include its BiAs-mode dual-line clamping behavior, low 58–75 pF capacitance at 12.5 V bias, AEC-Q101 qualification option, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The GSOT12C-G3-08 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 architecture supports parallel use of both internal diodes to double surge handling capacity.
When configured in BiSy-MODE (single-line symmetrical), pin 3 is left unconnected, and pins 1–2 form a bipolar clamp with matched positive/negative clamping thresholds-enabling flexible deployment across differential or single-ended data paths without redesigning layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD immunity | ±30 kV contact & air discharge per IEC 61000-4-2 - meets highest system-level ESD robustness requirements for consumer and automotive interfaces. |
| Reverse stand-off voltage (VRWM) | 12 V - ensures no leakage or interference on 12 V nominal signal lines such as RS-485, CAN FD physical layer, or industrial sensor outputs. |
| Peak pulse current (IPPM) | 12 A per line-to-ground path (IEC 61000-4-5, 8/20 μs) - sustains high-energy surges without failure in harsh industrial environments. |
| Clamping voltage (VC) | 21.2 V max at 12 A - limits transient overvoltage to safe levels for downstream 15 V-rated receivers and transceivers. |
| Capacitance (CD) | 58–75 pF at VR = 12.5 V, 1 MHz - low enough to avoid signal integrity degradation on USB 2.0 (480 Mbps) and HDMI 1.4 TMDS channels. |
| Operating temperature | −55 °C to +150 °C - supports under-hood automotive, industrial control, and outdoor equipment deployments. |
| AEC-Q101 qualified | Available in AEC-Q101-compliant variant - enables direct use in automotive infotainment, ADAS camera links, and body electronics. |
Pinout & Package
SOT-23 package: 3-pin, surface-mount, e3 Sn-plated, MSL level 1, 2.8 mm × 2.35 mm × 1.15 mm body, 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Line 1 anode / cathode (BiAs) | Connects to first protected signal line (e.g., USB D+); forms one half of dual-line ESD path to ground (pin 3). |
| Pin 2 | Line 2 anode / cathode (BiAs) | Connects to second protected signal line (e.g., USB D−); forms second half of dual-line ESD path to ground (pin 3). |
| Pin 3 | Ground reference | Mandatory connection to system ground plane; defines common return for both clamping paths in BiAs mode. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line BiAs protection | Enables simultaneous protection of differential pairs (e.g., USB, RS-422) with asymmetric clamping-low VF (~1.2 V) for negative transients, controlled VC for positives. |
| Low leakage current | IR ≤ 1 μA at 12 V - prevents loading of high-impedance sensor or analog front-end circuits. |
| Parallelable architecture | Both internal diodes can be used in parallel to double IPPM (to 24 A) and halve effective clamping impedance-ideal for high-surge zones like factory floor I/O. |
| Green RoHS-compliant | e3 Sn plating, halogen-free molding compound, UL 94 V-0 rating - satisfies environmental compliance for global industrial and automotive shipments. |
| High-temperature operation | Rated to +150 °C junction - supports placement near power converters or in sealed enclosures without derating. |
Applications
| USB 2.0 Interface Protection | HDMI 1.4 TMDS Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host port against ESD events during hot-plug insertion in industrial docking stations. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor placed directly at connector, operating in BiAs mode with pin 3 grounded. Use Value: 58–75 pF capacitance avoids signal rise-time degradation at 480 Mbps; 21.2 V clamping preserves integrity of 3.3 V PHY receivers. |
Use Scenario: Safeguarding TMDS clock and data channels in HDMI 1.4 displays exposed to user-handling ESD in retail kiosks or medical monitors. IC Role / Device Role / Timing Role: Two-channel ESD clamp per TMDS pair, leveraging BiAs clamping to handle both polarity transients without compromising DC bias. Use Value: ±30 kV ESD rating exceeds IEC 61000-4-2 Level 4; 12 V VRWM aligns with TMDS common-mode voltage range. |
| RS-485 Industrial Bus Node | Automotive Camera Link (FPD-Link III) |
Use Scenario: Front-end protection for RS-485 transceivers in programmable logic controllers (PLCs) installed in electrically noisy factory environments. IC Role / Device Role / Timing Role: Bidirectional asymmetrical clamp on A/B differential lines, with pin 3 tied to chassis ground to shunt common-mode surges. Use Value: 12 A IPPM withstands induced lightning surges per IEC 61000-4-5; −55 °C to +150 °C rating matches extended industrial temperature requirements. |
Use Scenario: ESD hardening of FPD-Link III serializer/deserializer links between automotive infotainment head units and rear-seat displays. IC Role / Device Role / Timing Role: Dual-line BiAs protector on high-speed serial lanes, placed adjacent to connector to minimize stub length and preserve signal integrity. Use Value: AEC-Q101 qualification option ensures automotive-grade reliability; 21.2 V VC protects 12 V tolerant SerDes I/O without additional TVS staging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT12C-G3-08 | Successor series with identical SOT-23 footprint, same VRWM (12 V), but improved thermal performance and extended lifecycle beyond January 2025 EOL date. | Drop-in replacement for new designs; requires no layout change but offers longer supply assurance and updated qualification testing. | Select when designing for production beyond Q1 2025 or requiring full long-term availability commitment. |
| SMF12CTHE3_A/H | Single-line 12 V TVS diode (SOD-123FL), 12.5 V VRWM, 23.2 V VC at 12 A - lacks dual-line integration and requires two devices per differential pair. | Suitable only for discrete line protection; increases component count and board area versus integrated dual-line solution. | Choose only if existing design uses SOD-123FL footprints or requires higher single-line surge margin (200 W PPP vs. GSOT12C's 312 W per path). |
Compared with VGSOT12C-G3-08, the GSOT12C-G3-08 offers identical electrical specs and pinout but has scheduled end-of-life in January 2025; compared with SMF12CTHE3_A/H, it integrates two protection paths in one SOT-23 device, reducing BOM count and PCB area while maintaining 12 V system compatibility.
Availability
GSOT12C-G3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, RS-485 industrial bus nodes, and automotive camera link applications requiring stable component supply through Q1 2025.
Supply support for GSOT12C-G3-08 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 diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The GSOTxxC family was engineered specifically for compact, high-performance ESD protection of high-speed data lines-including USB, HDMI, and industrial serial interfaces-with emphasis on low capacitance, precise clamping, and AEC-Q101 readiness.
FAQ
What is the maximum clamping voltage of the GSOT12C-G3-08 at its rated peak pulse current?
The GSOT12C-G3-08 exhibits a maximum reverse clamping voltage (VC) of 26 V at 12 A peak pulse current (IPPM) per line-to-ground path, measured per IEC 61000-4-5 (8/20 μs waveform). This value ensures downstream 15 V-tolerant ICs remain within safe operating limits during surge events. The GSOT12C-G3-08 achieves this with minimal voltage overshoot due to its optimized silicon structure and low dynamic impedance.
Can the GSOT12C-G3-08 be used for single-line symmetrical protection?
Yes, the GSOT12C-G3-08 supports BiSy-MODE (bidirectional symmetrical) operation: leave pin 3 unconnected, and use pins 1 and 2 as a single bipolar clamp across one signal line and ground. In this configuration, it delivers matched clamping for both polarities, with 23.4 V max VC at 12 A. The GSOT12C-G3-08 maintains full electrical specifications in either BiAs or BiSy mode without external component changes.
Is the GSOT12C-G3-08 qualified to AEC-Q101 standards?
The GSOT12C-G3-08 is available in an AEC-Q101-qualified version (marked with "H" prefix, e.g., HGSOT12C-G3-08), which undergoes stress testing including HTGB, AC-H3TRB, and ESD per AEC-Q101 Rev D. Standard GSOT12C-G3-08 units are not AEC-Q101 certified; designers must specify the "H" variant explicitly for automotive applications. The GSOT12C-G3-08 base part meets industrial reliability standards but lacks automotive qualification unless ordered with H suffix.
What is the typical capacitance of the GSOT12C-G3-08 at 12.5 V reverse bias?
At 12.5 V reverse bias and 1 MHz frequency, the GSOT12C-G3-08 exhibits a typical capacitance of 58–75 pF, as specified in its electrical characteristics table. This low, voltage-stable capacitance minimizes signal distortion on high-speed lines such as USB 2.0 and HDMI 1.4 TMDS, where excessive capacitance would degrade edge rates and increase bit error rates. The GSOT12C-G3-08 achieves this via optimized junction geometry and doping profile.
Does the GSOT12C-G3-08 require external current-limiting resistors in series with protected lines?
No, the GSOT12C-G3-08 does not require external series resistors for basic ESD protection. Its internal dynamic resistance and clamping behavior are designed to operate directly at the connector or IC I/O pad. However, in systems subject to sustained overvoltage (e.g., 24 V fault injection), a current-limiting resistor may be added upstream to prevent thermal runaway-this is not needed for standard IEC 61000-4-2 or -4-5 transient suppression. The GSOT12C-G3-08 functions autonomously in its intended ESD protection role.
GSOT12C-G3-08 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):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 312W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 115pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT12C-G3-08 FAQ
1.How can I place an order for GSOT12C-G3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT12C-G3-08 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 GSOT12C-G3-08 reliable?
The price and inventory of GSOT12C-G3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GSOT12C-G3-08 is usually 5 days.
3.What payment methods are accepted for GSOT12C-G3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT12C-G3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT12C-G3-08?
GSOT12C-G3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT12C-G3-08 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 GSOT12C-G3-08?
For technical support, including GSOT12C-G3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT12C-G3-08 requirements.
6.How does Aetrix verify that GSOT12C-G3-08 is sourced from the original manufacturer or authorized distributors?
All GSOT12C-G3-08 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 GSOT12C-G3-08 meets industry standards.
7.What is the process for return or replacement of GSOT12C-G3-08?
All GSOT12C-G3-08 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT12C-G3-08, 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 GSOT12C-G3-08 part is unused and in its original packaging.
Return procedure for GSOT12C-G3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT12C-G3-08 Tags
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