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Vishay General Semiconductor - Diodes Division GSOT12C-HT3-GS08
- Part No.:
- GSOT12C-HT3-GS08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- 3-WDFN
- Datasheet:
-
GSOT12C-HT3-GS08.pdf
- Description:
- TVS DIODE 12VWM 26VC LLP75-3B
- Quantity:
- Payment:
- Shipping:
Inventory:2,871
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Product details
Overview
GSOT12C-HT3-GS08 from Vishay Semiconductors is a two-line bidirectional asymmetrical (BiAs) ESD protection diode in LLP75-3B package, rated for ±30 kV IEC 61000-4-2 contact/air discharge, 12 V reverse standoff voltage (VRWM), and 12 A peak pulse current (IPPM) in line-to-ground configuration. It protects high-speed data lines such as USB 2.0, HDMI, and industrial serial interfaces against electrostatic discharge and transient surges.
For engineers reviewing the GSOT12C-HT3-GS08 datasheet, GSOT12C-HT3-GS08 pinout, GSOT12C-HT3-GS08 application, or GSOT12C-HT3-GS08 equivalent, this device delivers low clamping voltage (21.2–26 V at 12 A), sub-1 µA leakage at 12 V, and 50 pF capacitance at 6 V - critical for preserving signal integrity in 12 V-rated interface protection.
Technical Context
The GSOT12C-HT3-GS08 operates in BiAs mode: pins 1 and 2 connect to protected signal lines, pin 3 to ground, enabling independent clamping of each line to ground with asymmetrical forward/reverse behavior. Its dual-diode structure provides 13.5–15 V breakdown (VBR) and forward clamping as low as 2.2 V at 12 A.
In BiSy mode (pin 3 unconnected), it functions as a single-line symmetrical protector with 12.5 V VRWM, 13.5–15.7 V VBR, and clamping up to 28.1 V at 12 A - supporting legacy RS-485 or CAN bus surge protection where bipolar symmetry is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±30 kV contact & air discharge per IEC 61000-4-2 - meets highest system-level ESD immunity requirements without external shielding |
| Reverse Standoff Voltage (VRWM) | 12 V at IR = 1 µA - ensures no leakage during normal 12 V interface operation (e.g., automotive LIN, industrial I/O) |
| Peak Pulse Current (IPPM) | 12 A (line-to-ground), 12 A (line-to-line) per IEC 61000-4-5 8/20 µs - sustains multiple surge events in harsh environments |
| Clamping Voltage (VC) | 21.2–26 V at IPPM = 12 A - limits transient overvoltage to safe levels for 3.3 V/5 V logic receivers downstream |
| Diode Capacitance (CD) | 50 pF at VR = 6 V, 1 MHz - enables use on USB 2.0 (480 Mbps) and RS-422 links without signal degradation |
| Leakage Current (IR) | 1 µA at VR = 12 V - prevents power drain in battery-powered sensor nodes and always-on interfaces |
| Package | LLP75-3B (2.1 × 1.3 × 0.5 mm) - ultra-compact footprint compatible with fine-pitch PCB layouts and automated assembly |
Pinout & Package
LLP75-3B package: 3-terminal leadless plastic package with exposed thermal pad, MSL level 1, matte tin (e3) finish, RoHS-compliant, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Signal Line 1 Anode/Cathode | Connects to first protected data line (e.g., USB D+); forms one half of BiAs protection path to ground (Pin 3) |
| Pin 2 | Signal Line 2 Anode/Cathode | Connects to second protected data line (e.g., USB D−); forms second BiAs path to ground (Pin 3) |
| Pin 3 | Ground Reference Terminal | Low-inductance connection point to system ground plane; essential for effective transient shunting in BiAs mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Asymmetrical (BiAs) Protection | Enables independent line-to-ground clamping with low forward VF (~2.2 V) and controlled reverse VC - ideal for differential data pairs requiring matched but non-symmetric surge response |
| Ultra-Low Leakage | 1 µA max at 12 V VRWM - eliminates standby current concerns in energy-sensitive applications like IoT edge sensors |
| High Surge Robustness | 12 A IPPM with 312 W peak pulse power (line-to-ground) - withstands repeated lightning-induced surges in industrial fieldbus installations |
| Signal Integrity Optimized | 50 pF capacitance at 6 V bias - preserves rise/fall times on 480 Mbps USB 2.0 and 10 Mbps RS-485 links |
| Space-Efficient LLP75-3B | 2.1 × 1.3 mm footprint - saves >60% board area vs. SOT-23 while maintaining thermal performance via exposed pad |
Applications
| USB 2.0 Interface Protection | HDMI DDC Channel Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines on host controllers and peripheral devices against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Two-line ESD clamp placed immediately before connector, referenced to chassis ground. Use Value: Limits transient voltage to ≤26 V during ±30 kV ESD strikes, preventing damage to PHY transceivers while maintaining <50 pF loading for full-speed signaling. |
Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) from ESD during cable mating in consumer AV equipment. IC Role / Device Role / Timing Role: BiAs-mode protector on 5 V-tolerant I²C bus, with Pin 3 grounded to shielded HDMI connector shell. Use Value: Delivers 12 V VRWM matching DDC voltage range and 50 pF capacitance that avoids I²C timing violations at 100 kHz standard mode. |
| Industrial RS-485 Transceiver Protection | Automotive LIN Bus Node Protection |
Use Scenario: Adding secondary surge protection to RS-485 transceivers in factory automation gateways exposed to long cable runs. IC Role / Device Role / Timing Role: Line-to-ground clamp on A/B differential pair, used alongside primary TVS array for multi-stage protection. Use Value: Provides 12 A IPPM handling capability and 21.2 V clamping to keep transceiver stress below absolute maximum ratings during 4 kV EFT bursts. |
Use Scenario: Protecting LIN slave nodes (e.g., door modules, seat controls) from ESD and load-dump induced transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: BiAs-mode protector on LIN bus line, with Pin 3 tied to vehicle chassis ground near connector entry point. Use Value: 12 V VRWM matches LIN specification; 1 µA leakage prevents battery drain; ±30 kV ESD rating exceeds ISO 10605 Class IV requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Single-line unidirectional TVS; 12 V VWM, 30 A IPPM, 19.9 V VC @ 12 A; DO-214AC package (4.5 × 3.3 mm) | Requires separate diodes per line; higher capacitance (>100 pF); unsuitable for high-speed data | Choose for cost-sensitive, low-frequency power rail protection where board space is not constrained. |
| TPD2E001DRYR | Two-line bidirectional ESD protector; 5 V VRWM, 1 A IPPM, 12 pF CD @ 0 V; 1.4 × 1.0 mm X2SON | Lower voltage rating and surge capacity; optimized for USB 2.0/3.0, not 12 V industrial buses | Choose for portable electronics with strict capacitance limits (<15 pF) and ≤5 V operating rails. |
Compared with SMAJ12A and TPD2E001DRYR, GSOT12C-HT3-GS08 uniquely balances 12 V standoff, 12 A surge capability, and 50 pF capacitance in a 2.1 mm × 1.3 mm footprint - making it the only option validated for robust, space-constrained protection of 12 V-rated differential data links.
Availability
GSOT12C-HT3-GS08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial RS-485 transceiver safeguarding, and automotive LIN bus node hardening requiring stable component supply across production lifecycles.
Supply support for GSOT12C-HT3-GS08 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 designs discrete semiconductors and passive components for high-reliability power, sensing, and protection applications, with global manufacturing and AEC-Q200 qualified product lines.
The GSOTxxC-HT3 series was developed specifically for compact, high-performance ESD and surge protection of high-speed data interfaces in automotive, industrial, and consumer electronics - emphasizing low capacitance, precise voltage thresholds, and repeatable clamping behavior.
FAQ
What is the correct biasing configuration for GSOT12C-HT3-GS08 in USB 2.0 D+/D− protection?
For USB 2.0, configure GSOT12C-HT3-GS08 in BiAs mode: connect Pin 1 to D+, Pin 2 to D−, and Pin 3 to system ground near the USB connector. This provides independent line-to-ground clamping with 21.2–26 V VC at 12 A, preserving signal integrity while meeting IEC 61000-4-2 ±30 kV requirements. Do not float Pin 3 - grounding it is mandatory for specified performance.
Does GSOT12C-HT3-GS08 support bidirectional symmetrical (BiSy) protection, and how is it implemented?
Yes, GSOT12C-HT3-GS08 supports BiSy mode for single-line applications: connect Pin 1 to the signal line (e.g., RS-485 A), Pin 2 to ground, and leave Pin 3 unconnected. In this configuration, it delivers 12.5 V VRWM, 13.5–15.7 V VBR, and clamping up to 28.1 V at 12 A - suitable for bipolar transients on legacy industrial buses where symmetrical clamping is required.
What is the maximum allowable PCB trace inductance when routing GSOT12C-HT3-GS08 for optimal ESD performance?
To achieve the specified 21.2–26 V clamping voltage at 12 A, total path inductance from protected line to Pin 3 ground must be ≤15 nH. This requires a direct, short (<3 mm), wide (≥0.3 mm) trace from Pin 3 to a solid ground plane with ≥2 vias to inner ground layers. Longer or narrower traces increase inductive overshoot, degrading clamping performance beyond datasheet values.
Can GSOT12C-HT3-GS08 be used in parallel to increase surge current handling, and what design trade-offs apply?
Yes - connecting two GSOT12C-HT3-GS08 devices in parallel (Pins 1–1, 2–2, 3–3) doubles IPPM to 24 A and halves clamping voltage by reducing series impedance. However, this also doubles diode capacitance (to ~100 pF) and reverse leakage (to ~2 µA), which may violate timing or power budgets in high-speed or ultra-low-power applications.
Is GSOT12C-HT3-GS08 compliant with automotive qualification standards such as AEC-Q200?
No - GSOT12C-HT3-GS08 is not AEC-Q200 qualified. While its operating temperature range (−40 °C to +125 °C) meets automotive ambient requirements, Vishay does not list this part in its AEC-Q200 stress-tested portfolio. For automotive-critical LIN or infotainment interfaces, use AEC-Q200-qualified alternatives such as the VS3V3BC1DP or SMAJ12AQ.
GSOT12C-HT3-GS08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- 3-WDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Min)
- 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:
- -
- Capacitance @ Frequency:
- 115pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LLP75-3B
GSOT12C-HT3-GS08 FAQ
1.How can I place an order for GSOT12C-HT3-GS08 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT12C-HT3-GS08 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-HT3-GS08 reliable?
The price and inventory of GSOT12C-HT3-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GSOT12C-HT3-GS08 is usually 5 days.
3.What payment methods are accepted for GSOT12C-HT3-GS08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT12C-HT3-GS08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT12C-HT3-GS08?
GSOT12C-HT3-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT12C-HT3-GS08 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-HT3-GS08?
For technical support, including GSOT12C-HT3-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT12C-HT3-GS08 requirements.
6.How does Aetrix verify that GSOT12C-HT3-GS08 is sourced from the original manufacturer or authorized distributors?
All GSOT12C-HT3-GS08 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-HT3-GS08 meets industry standards.
7.What is the process for return or replacement of GSOT12C-HT3-GS08?
All GSOT12C-HT3-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT12C-HT3-GS08, 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-HT3-GS08 part is unused and in its original packaging.
Return procedure for GSOT12C-HT3-GS08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT12C-HT3-GS08 Tags
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