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Vishay General Semiconductor - Diodes Division GSOT08C-E3-18
- Part No.:
- GSOT08C-E3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT08C-E3-18.pdf
- Description:
- TVS DIODE 8VWM 19.2VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,886
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Product details
Overview
GSOT08C-E3-18 from Vishay Semiconductors is a two-line bidirectional ESD protection diode in SOT-23 package, rated for ±30 kV IEC 61000-4-2 contact/air discharge, 8 V reverse stand-off voltage (VRWM), 18 A peak pulse current (IPPM), and 160–250 pF capacitance at 0 V bias. It protects high-speed data lines such as USB 2.0 or RS-485 interfaces in automotive infotainment systems.
For engineers reviewing the GSOT08C-E3-18 datasheet, GSOT08C-E3-18 pinout, GSOT08C-E3-18 application, or GSOT08C-E3-18 equivalent, key selection criteria include clamping voltage under 18 A surge (≤19.2 V), low leakage (<5 µA at 8 V), BiAs-mode dual-line operation, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The GSOT08C-E3-18 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 (~19.2 V).
It also supports BiSy-MODE (single-line symmetrical): pin 1 to signal line, pin 2 to ground (pin 3 floating), delivering matched ±18.5 V clamping at 18 A with 80–125 pF capacitance - suitable for balanced interfaces requiring equal positive/negative transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD immunity | ±30 kV contact/air discharge per IEC 61000-4-2 - meets Level 4 system-level ESD robustness for automotive ECUs and industrial HMI panels. |
| Reverse stand-off voltage (VRWM) | 8 V - ensures no leakage or conduction during normal 5 V or 3.3 V logic signaling, preserving signal integrity. |
| Peak pulse current (IPPM) | 18 A per line (IEC 61000-4-5, 8/20 μs) - handles severe lightning-induced surges on CAN or LIN bus stubs. |
| Clamping voltage (VC) | ≤19.2 V at 18 A (BiAs mode, pin 1–3 or 2–3) - limits voltage seen by downstream PHY ICs to safe levels below absolute maximum ratings. |
| Capacitance (CD) | 160–250 pF at 0 V, 80 pF at 4 V (BiAs mode) - compatible with USB 2.0 (≤200 pF) and RS-485 (≤500 pF) signal bandwidth requirements. |
| Leakage current (IR) | ≤5 µA at 8 V - avoids DC loading on high-impedance sensor inputs or battery-powered wake-up lines. |
| Operating temperature | −55 °C to +150 °C - qualified for under-hood automotive applications per AEC-Q101. |
Pinout & Package
SOT-23 package (JEDEC TO-236AB), 3-pin surface-mount, 2.8 mm × 2.35 mm footprint, MSL level 1, lead (Pb)-free e3 Sn plating, peak reflow ≤260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Line 1 anode / cathode | Connects to first protected signal line (e.g., USB D+); forms one half of BiAs protection path to ground (pin 3). |
| Pin 2 | Line 2 anode / cathode | Connects to second protected signal line (e.g., USB D−); forms second half of BiAs path to ground (pin 3). |
| Pin 3 | Ground reference | Must be connected to low-impedance system ground; provides common return for both ESD current paths in BiAs mode. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line ESD protection | Single SOT-23 device protects two independent data lines simultaneously - reduces BOM count and PCB area vs. discrete diodes. |
| BiAs-MODE asymmetry | Forward clamping ≤3 V at 18 A enables tighter negative transient control near ground, critical for single-supply analog front-ends. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock - supports Tier-1 ECU designs. |
| e3 Sn termination | RoHS-compliant matte tin plating ensures reliable solderability and eliminates whisker risk in long-life automotive modules. |
| Low capacitance at operating bias | 80 pF at 4 V reverse bias - minimizes signal distortion on 480 Mbps USB 2.0 differential pairs without requiring layout compensation. |
Applications
| USB 2.0 Interface Protection | Automotive LIN Bus Node |
|---|---|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 port in a vehicle head unit against ESD events during cable insertion or user handling. IC Role / Device Role / Timing Role: Two-line transient voltage suppressor placed directly at connector, shunting ESD energy to chassis ground before it reaches the USB transceiver IC. Use Value: Maintains 480 Mbps data integrity with <250 pF total capacitance while surviving ±30 kV contact discharge - eliminating need for external RC filters. | Use Scenario: Safeguarding LIN transceiver pins in door module ECUs exposed to ESD during assembly or service operations. IC Role / Device Role / Timing Role: Bidirectional clamping device on LIN bus line (pin 1) and ground-referenced wake line (pin 2), with pin 3 grounded. Use Value: Enables AEC-Q101-compliant design with 18 A surge rating and −55 °C to +150 °C operation - ensuring reliability in harsh under-door environments. |
| Industrial RS-485 Transceiver Port | Medical Patient Monitor Data Link |
Use Scenario: Protecting differential A/B lines of an isolated RS-485 transceiver in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Dual-channel TVS diode configured in BiAs mode to clamp fast transients induced by motor switching noise on long cable runs. Use Value: Delivers 19.2 V clamping at 18 A while adding only 160–250 pF capacitance - preserving signal edge rates up to 10 Mbps without degrading eye diagram. | Use Scenario: Shielding serial communication lines (e.g., UART to display controller) in portable patient monitors from ESD during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) ESD protector on 3.3 V logic lines, operating across full medical temperature range with no parametric drift. Use Value: Meets IEC 61000-4-2 Level 4 and supports 150 °C reflow for sterilizable enclosure assemblies - reducing field failure risk in critical care settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT08C-E3-18 | Successor series with identical SOT-23 footprint, same VRWM (8 V), but improved clamping (≤17.5 V at 18 A) and lower leakage (≤1 µA). | End-of-life replacement with enhanced surge margin; requires validation of reduced clamping voltage impact on downstream IC thresholds. | Select when designing new platforms needing extended product lifecycle beyond January 2025. |
| SMF08CTHE3_A/H | Single-line SOD-123 package, 8 V VRWM, 100 W peak power, higher capacitance (350 pF), no BiAs capability. | Limited to single-line protection; unsuitable for dual-line interfaces like USB without two devices. | Use only for cost-sensitive, non-automotive applications where dual-line integration is unnecessary. |
Compared with VGSOT08C-E3-18, the original GSOT08C-E3-18 offers proven AEC-Q101 reliability but reaches end-of-life in January 2025; SMF08CTHE3_A/H provides lower cost but doubles component count and increases board space for dual-line protection.
Availability
GSOT08C-E3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and medical patient monitor data links requiring stable component supply through its scheduled end-of-life date in January 2025.
Supply support for GSOT08C-E3-18 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 diodes, MOSFETs, and protection devices for automotive, industrial, and computing markets.
The GSOTxxC family was engineered specifically for compact, high-surge-capacity ESD protection in space-constrained automotive and industrial electronics, emphasizing AEC-Q101 compliance, low clamping, and dual-line integration.
FAQ
What is the maximum clamping voltage of the GSOT08C-E3-18 under full-rated surge current?
The GSOT08C-E3-18 exhibits a maximum reverse clamping voltage (VC) of 19.2 V when subjected to its rated 18 A peak pulse current (IPPM) per IEC 61000-4-5 (8/20 μs waveform) in BiAs mode (pin 1–3 or pin 2–3). This value ensures downstream ICs with 20 V absolute maximum ratings remain within safe operating limits during surge events.
Can the GSOT08C-E3-18 protect both differential and single-ended signal lines?
Yes, the GSOT08C-E3-18 supports two distinct configurations: BiAs-MODE (pins 1 & 2 to signal lines, pin 3 to ground) for differential or dual single-ended lines, and BiSy-MODE (pin 1 to signal, pin 2 to ground, pin 3 open) for single-ended bipolar protection. Each mode delivers verified clamping performance per published electrical characteristics.
Is the GSOT08C-E3-18 qualified for automotive applications?
Yes, the GSOT08C-E3-18 is AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock. Its −55 °C to +150 °C operating range and e3 Sn termination meet automotive manufacturing and under-hood deployment requirements.
What is the typical capacitance of the GSOT08C-E3-18 at 4 V reverse bias?
The GSOT08C-E3-18 has a typical capacitance of 80 pF at 4 V reverse bias and 1 MHz frequency, measured between either pin 1–3 or pin 2–3. This low bias-dependent capacitance supports high-speed data protocols such as USB 2.0 without significant signal rise-time degradation.
Does the GSOT08C-E3-18 require external components for basic ESD protection?
No, the GSOT08C-E3-18 operates as a standalone ESD protection device with no external resistors, capacitors, or ferrites required. Its integrated dual-diode structure provides complete transient suppression when correctly routed with short traces to ground - simplifying layout and reducing BOM complexity.
GSOT08C-E3-18 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-E3-18 FAQ
1.How can I place an order for GSOT08C-E3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT08C-E3-18 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-E3-18 reliable?
The price and inventory of GSOT08C-E3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GSOT08C-E3-18 is usually 5 days.
3.What payment methods are accepted for GSOT08C-E3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT08C-E3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT08C-E3-18?
GSOT08C-E3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT08C-E3-18 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-E3-18?
For technical support, including GSOT08C-E3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT08C-E3-18 requirements.
6.How does Aetrix verify that GSOT08C-E3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT08C-E3-18 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-E3-18 meets industry standards.
7.What is the process for return or replacement of GSOT08C-E3-18?
All GSOT08C-E3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT08C-E3-18, 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-E3-18 part is unused and in its original packaging.
Return procedure for GSOT08C-E3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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