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Vishay General Semiconductor - Diodes Division GSOT08C-HE3-18
- Part No.:
- GSOT08C-HE3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT08C-HE3-18.pdf
- Description:
- TVS DIODE 8VWM 19.2VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,420
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Product details
Overview
GSOT08C-HE3-18 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 15.2 V max clamping voltage at 18 A. It protects high-speed data lines such as USB 2.0 or RS-485 interfaces against transient overvoltage.
For engineers reviewing the GSOT08C-HE3-18 datasheet, GSOT08C-HE3-18 pinout, GSOT08C-HE3-18 application, or GSOT08C-HE3-18 equivalent, key selection criteria include its BiAs-mode dual-line asymmetrical clamping behavior, low 80–125 pF capacitance at 8.5 V bias, AEC-Q101 qualification option, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The GSOT08C-HE3-18 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-biased diodes) with distinct VC levels. Its 9–11 V breakdown voltage (VBR) and 1.0–1.2 V forward voltage (VF) define asymmetric conduction thresholds.
In BiSy-MODE (single-line symmetrical), pin 3 is left unconnected; pins 1 and 2 form a bipolar path with 9.5–11.7 V VBR and 11.7–14 V VC at 1 A, delivering matched positive/negative clamping. Both modes operate across –55 °C to +150 °C junction temperature and comply with AEC-Q101 when specified.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD immunity | ±30 kV contact/air discharge per IEC 61000-4-2 - meets automotive and industrial system-level ESD robustness requirements without external shielding. |
| Reverse stand-off voltage (VRWM) | 8 V - supports 3.3 V and 5 V logic systems while blocking normal operating voltages up to 8 V. |
| Peak pulse current (IPPM) | 18 A per line (IEC 61000-4-5, 8/20 μs) - handles surge events in industrial communication ports and automotive infotainment interfaces. |
| Max clamping voltage (VC) | 19.2 V at 18 A (pin 1–3 or 2–3) - limits transient voltage to safe levels for downstream 24 V-tolerant receivers. |
| Capacitance (CD) | 80–125 pF at VR = 4 V, 1 MHz - enables use on USB 2.0 (480 Mbps) and CAN FD (5 Mbps) lines without signal integrity degradation. |
| Operating temperature | –55 °C to +150 °C - qualified for under-hood automotive and industrial control applications requiring extended thermal range. |
| Package | SOT-23 - standard 3-pin surface-mount footprint with 2.8 mm × 2.35 mm body, compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
SOT-23 package: 3-pin, gull-wing leaded plastic case, e3 Sn plating, MSL level 1, 260 °C peak reflow. Dimensions: 2.8 mm × 2.35 mm × 1.15 mm (L × W × H), 0.95 mm lead pitch.
| 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 dual-path protection network. |
| Pin 2 | Line 2 anode / cathode | Connects to second protected signal line (e.g., USB D–); symmetrically paired with Pin 1 for differential ESD suppression. |
| Pin 3 | Ground reference | Must be connected to low-impedance system ground to provide return path for ESD current; determines BiAs clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line BiAs protection mode | Enables simultaneous protection of differential pairs (e.g., RS-485, CAN) with optimized forward/reverse clamping asymmetry for minimal signal distortion. |
| AEC-Q101 qualification option | Available in AEC-Q101-qualified variants (e.g., GSOT08C-HG3-18) - supports automotive ECUs and ADAS sensor interfaces requiring stress-tested reliability. |
| Low leakage current | 5 μA max at 8 V VR - prevents DC loading on high-impedance sensor inputs and battery-powered IoT nodes. |
| High surge power rating | 400 W peak pulse power (pin 1–2, 8/20 μs) - exceeds IEC 61000-4-5 Level 4 requirements for industrial equipment. |
| RoHS-compliant & green | e3 Sn plating, halogen-free molding compound, UL 94 V-0 flammability - meets global environmental compliance mandates for consumer and medical electronics. |
Applications
| USB 2.0 Interface Protection | Automotive LIN Bus |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D– lines in portable medical devices against ESD during cable insertion or handling. IC Role / Device Role / Timing Role: Two-line ESD suppressor placed directly at USB connector, clamping transients before they reach the USB PHY IC. Use Value: 80–125 pF capacitance ensures <1% signal rise-time degradation at 480 Mbps; ±30 kV rating eliminates need for secondary board-level shielding. |
Use Scenario: Safeguarding LIN transceiver I/O pins in automotive door modules exposed to ESD during service operations. IC Role / Device Role / Timing Role: Bidirectional clamp between LIN bus line and chassis ground, operating in BiAs mode with pin 3 grounded. Use Value: 15.2 V max clamping at 18 A prevents damage to LIN transceivers rated for 18 V absolute maximum; –55 °C to +150 °C range matches under-dash thermal profile. |
| Industrial RS-485 Transceivers | Smart Meter Communication Ports |
Use Scenario: Protecting half-duplex RS-485 A/B lines in factory automation gateways subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Dual-channel TVS diode placed at transceiver output, shunting common-mode transients to ground via pin 3. Use Value: 18 A IPPM and 400 W peak power withstand capability meet IEC 61000-4-5 Level 3 (1 kV) surge immunity without derating. |
Use Scenario: Securing optical or RF communication ports in utility smart meters installed in outdoor enclosures. IC Role / Device Role / Timing Role: ESD guard for M-Bus or PLC interface lines, leveraging BiSy mode (pin 3 open) for symmetrical clamping on single-wire links. Use Value: 11.7 V VC at 1 A ensures microcontroller I/O pins remain within safe voltage margins during 8 kV HBM ESD events per AEC-Q101. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT08C-HG3-18 | Successor device in same SOT-23 package; identical VRWM (8 V), IPPM (18 A), and VC (15.2 V), but with updated process and extended lifecycle beyond Jan 2025 EOL date. | Drop-in replacement for new designs; supports same BiAs/BiSy modes and PCB layout. | Select for long-term production continuity and guaranteed supply beyond GSOT08C-HE3-18's January 2025 end-of-life. |
| SMF08CT-7 | Single-line 8 V TVS (SOD-123); 12 A IPPM, 16.5 V VC at 12 A; higher capacitance (150 pF) and no dual-line integration. | Requires two devices for differential protection; increases board area and parasitic inductance vs. integrated dual-channel solution. | Consider only if dual-line integration is unnecessary and cost-per-channel is prioritized over layout efficiency. |
Compared with GSOT08C-HE3-18, VGSOT08C-HG3-18 offers identical electrical performance with assured long-term availability, while SMF08CT-7 sacrifices integration and clamping precision for lower unit cost in non-differential applications.
Availability
GSOT08C-HE3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive LIN bus safeguarding, and industrial RS-485 transceiver applications requiring stable component supply through its January 2025 end-of-life date.
Supply support for GSOT08C-HE3-18 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-performance ESD protection of high-speed data lines, balancing low capacitance, precise clamping, and AEC-Q101 readiness in standard SOT-23 packaging.
FAQ
What is the primary protection mode supported by GSOT08C-HE3-18?
The GSOT08C-HE3-18 supports BiAs-MODE (Bidirectional Asymmetrical) as its primary configuration: pins 1 and 2 connect to protected signal lines, pin 3 to ground, enabling distinct clamping for positive (reverse-biased) and negative (forward-biased) transients. This mode is optimized for differential interfaces like USB and RS-485. GSOT08C-HE3-18 also supports BiSy-MODE (single-line symmetrical) with pin 3 unconnected.
Does GSOT08C-HE3-18 meet AEC-Q101 qualification requirements?
GSOT08C-HE3-18 itself is not AEC-Q101 qualified; however, the GSOT08C family includes AEC-Q101-qualified variants such as GSOT08C-HG3-18. The HE3 suffix denotes RoHS-compliant, lead (Pb)-free, tin (Sn) plated terminals with green molding compound, but does not imply automotive qualification. For automotive applications, specify the HG3 variant.
What is the maximum clamping voltage of GSOT08C-HE3-18 under full-rated surge conditions?
The maximum clamping voltage of GSOT08C-HE3-18 is 19.2 V when subjected to its full-rated 18 A peak pulse current (IPPM) per protection path (pin 1–3 or pin 2–3), measured per IEC 61000-4-5 (8/20 μs waveform). At 1 A, clamping is 10.7–13 V - critical for ensuring downstream ICs remain within safe operating voltage windows.
How does the capacitance of GSOT08C-HE3-18 affect high-speed data lines?
GSOT08C-HE3-18 exhibits 80–125 pF capacitance at 4 V reverse bias (1 MHz), low enough to avoid significant signal integrity impact on USB 2.0 (480 Mbps) and CAN FD (5 Mbps) buses. Its capacitance drops to ~60 pF at 8.5 V bias in BiSy mode, further minimizing jitter and eye-diagram closure in noise-sensitive communication links.
What is the end-of-life status of GSOT08C-HE3-18 and what is the recommended alternative?
GSOT08C-HE3-18 is scheduled for end-of-life in January 2025 per Vishay document 85824 rev. 3.0. The officially recommended alternative is VGSOT08C-HG3-18 - a functionally identical, pin-compatible successor with extended availability, same 8 V VRWM, 18 A IPPM, and 15.2 V clamping, designed to ensure seamless transition for existing and new designs.
GSOT08C-HE3-18 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:
- -
- Capacitance @ Frequency:
- 160pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT08C-HE3-18 FAQ
1.How can I place an order for GSOT08C-HE3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT08C-HE3-18 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-HE3-18 reliable?
The price and inventory of GSOT08C-HE3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GSOT08C-HE3-18 is usually 5 days.
3.What payment methods are accepted for GSOT08C-HE3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT08C-HE3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT08C-HE3-18?
GSOT08C-HE3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT08C-HE3-18 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-HE3-18?
For technical support, including GSOT08C-HE3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT08C-HE3-18 requirements.
6.How does Aetrix verify that GSOT08C-HE3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT08C-HE3-18 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-HE3-18 meets industry standards.
7.What is the process for return or replacement of GSOT08C-HE3-18?
All GSOT08C-HE3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT08C-HE3-18, 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-HE3-18 part is unused and in its original packaging.
Return procedure for GSOT08C-HE3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT08C-HE3-18 Tags
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