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Vishay General Semiconductor - Diodes Division GSOT03C-E3-18
- Part No.:
- GSOT03C-E3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT03C-E3-18.pdf
- Description:
- TVS DIODE 3.3VWM 12.3VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,930
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Product details
Overview
GSOT03C-E3-18 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, 3.3 V reverse stand-off voltage (VRWM), and 30 A peak pulse current (IPPM) per line-to-ground path. It serves as primary transient suppression for low-voltage data lines such as USB 2.0, HDMI DDC, or I²C interfaces in automotive infotainment and industrial control panels.
For engineers reviewing the GSOT03C-E3-18 datasheet, GSOT03C-E3-18 pinout, GSOT03C-E3-18 application, or GSOT03C-E3-18 equivalent, key selection criteria include its 3.3 V VRWM compatibility with 3.3 V logic systems, BiAs-mode dual-line clamping behavior, 5.7 V typical reverse clamping voltage at 1 A, and SOT-23 footprint suitability for space-constrained PCB layouts.
Technical Context
The GSOT03C-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 each line to ground with distinct forward/reverse thresholds. Its asymmetry arises from separate conduction paths-reverse transients clamp via breakdown (VBR = 4.0–5.5 V), while negative transients clamp near ground via low VF (~1.0–1.2 V).
It supports dual operational modes: two-line protection (pin 1 & 2 → signals, pin 3 → GND) or single-line symmetrical protection (pin 1 → signal, pin 2 → GND, pin 3 unconnected), delivering 3.8 V VRWM and 7.0 V VC at 1 A in the latter configuration. Both modes maintain full AEC-Q101 qualification and MSL Level 1 soldering compatibility.
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 electronics. |
| Reverse Stand-off Voltage (VRWM) | 3.3 V - ensures no leakage or interference on 3.3 V data buses during normal operation. |
| Peak Pulse Current (IPPM) | 30 A per line-to-ground path - handles severe lightning-induced surges per IEC 61000-4-5 (8/20 μs waveform). |
| Reverse Clamping Voltage (VC) | 5.7 V typ. at 1 A; 10 V max. at 30 A - limits voltage stress on downstream 3.3 V ICs during ESD events. |
| Capacitance (CD) | 420–600 pF at 0 V, 260 pF at 1.6 V - optimized for low-speed interfaces; avoids signal integrity issues on <10 MHz lines. |
| Operating Temperature | -55 °C to +150 °C - supports under-hood automotive and industrial environments without derating. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV (Class H3B), enabling use in safety-critical modules. |
Pinout & Package
SOT-23 package (JEDEC TO-236AB), 3-pin surface-mount, 2.8 mm × 2.35 mm × 1.15 mm body, e3 Sn plating, MSL Level 1, 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 independent BiAs path to ground (Pin 3). |
| Pin 3 | Ground Reference | Must be connected to clean system ground; serves as common return for both clamping paths in two-line mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Asymmetrical (BiAs) Protection | Enables simultaneous protection of two independent data lines with ground-referenced clamping, minimizing crosstalk and preserving signal polarity integrity. |
| Low Forward Clamping (VF) | 1.0–1.2 V at 1 A - suppresses negative transients close to ground potential, protecting NMOS inputs and open-drain drivers. |
| Parallelable Architecture | Two internal diodes can be used in parallel to double IPPM (to 60 A) and halve effective series impedance, reducing VC by up to 15 % under high-current surges. |
| Automotive-Grade Qualification | AEC-Q101 qualified with HBM Class H3B (>8 kV) - certified for deployment in ADAS sensors, body control modules, and infotainment head units. |
| Green RoHS Compliance | e3 Sn termination, halogen-free molding compound (UL 94 V-0), and lead-free packaging - meets global environmental compliance mandates. |
Applications
| USB 2.0 Interface Protection | HDMI DDC Channel Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− differential pair against ESD events during hot-plug insertion in automotive docking stations. IC Role / Device Role / Timing Role: Primary front-end ESD clamp placed immediately after connector, before USB transceiver IC. Use Value: 3.3 V VRWM matches USB PHY operating voltage; 5.7 V VC at 1 A prevents latch-up in USB controller while maintaining signal rise time integrity. | Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) in smart displays exposed to user-handling ESD. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor on I²C-compatible DDC bus operating at 3.3 V and ≤100 kHz. Use Value: 420–600 pF capacitance does not degrade DDC signal edges; ±30 kV immunity exceeds IEC 61000-4-2 Level 4 requirement. |
| Automotive Body Control Module I/O | Industrial Sensor Interface Protection |
Use Scenario: Shielding LIN bus or wake-up lines in body control modules from cable-discharge events in vehicle assembly and service environments. IC Role / Device Role / Timing Role: Secondary ESD guard on low-speed control lines interfacing with microcontrollers in AEC-Q100 Grade 2 systems. Use Value: -55 °C to +150 °C operating range supports under-dash mounting; AEC-Q101 qualification ensures long-term field reliability. | Use Scenario: Protecting analog sensor outputs (e.g., temperature, pressure) connected to ADC inputs in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage (≤100 μA at 3.3 V) transient suppressor placed at sensor harness entry point. Use Value: 100 μA IR at VRWM prevents DC offset errors in precision 12-bit ADC measurements; SOT-23 footprint enables dense sensor node layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT03C-E3-18 | Successor device with identical SOT-23 footprint, same VRWM (3.3 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 enhanced surge endurance margin. | Select for production programs requiring long-term supply continuity and higher reliability margin in harsh environments. |
| SMF3.3A-T | Single-line TVS diode (SOD-123), 3.3 V VRWM, 12 A IPPM, 12.5 V VC at 1 A - lower surge rating and higher clamping voltage than GSOT03C-E3-18. | Requires two devices for dual-line protection; higher VC increases risk of IC damage during ESD events. | Acceptable only for cost-sensitive, non-automotive applications where dual-line integration is not required. |
Compared with VGSOT03C-E3-18, the original GSOT03C-E3-18 offers identical electrical specs but lacks the extended lifetime and thermal robustness of the successor; versus SMF3.3A-T, it delivers integrated dual-line protection with 40 % lower clamping voltage and 2.5× higher surge current handling in the same board area.
Availability
GSOT03C-E3-18 is available at Aetrix Electronics and suitable for USB interface protection, automotive body control modules, and industrial sensor interface applications requiring stable component supply through its End-of-Life date in January 2025.
Supply support for GSOT03C-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 power management, sensing, and circuit protection components with emphasis on reliability and automotive-grade qualification.
The GSOTxxC family was engineered specifically for high-density, dual-line ESD protection in space-constrained automotive and industrial electronics, prioritizing low clamping voltage, AEC-Q101 compliance, and seamless SOT-23 integration.
FAQ
What is the maximum reverse working voltage (VRWM) of the GSOT03C-E3-18?
The GSOT03C-E3-18 has a maximum reverse working voltage (VRWM) of 3.3 V, verified per IEC 61000-4-2 test conditions. This value ensures reliable operation on standard 3.3 V logic and data buses without leakage or false triggering during normal signal swings. The VRWM is measured at IR ≤ 100 μA and defines the upper limit of continuous DC or signal voltage the device tolerates before entering breakdown.
Can the GSOT03C-E3-18 protect two independent signal lines simultaneously?
Yes, the GSOT03C-E3-18 is explicitly designed for two-line protection using BiAs-MODE: pins 1 and 2 connect to separate signal lines (e.g., D+ and D−), and pin 3 connects to ground. Each line has its own dedicated clamping path to ground, providing independent, asymmetrical protection with no shared impedance coupling - confirmed in Vishay's Electrical Characteristics table for "between pin 1 to pin 3 or pin 2 to pin 3".
What is the clamping voltage of the GSOT03C-E3-18 at 30 A peak pulse current?
At 30 A peak pulse current (IPPM), the reverse clamping voltage (VC) of the GSOT03C-E3-18 is 10 V minimum and 12.3 V maximum, per IEC 61000-4-5 8/20 μs waveform testing. This value reflects worst-case voltage seen by downstream ICs during high-energy surges and is critical for ensuring compatibility with 3.3 V logic absolute maximum ratings.
Is the GSOT03C-E3-18 qualified for automotive applications?
Yes, the GSOT03C-E3-18 is AEC-Q101 qualified and rated for human body model (HBM) Class H3B (>8 kV). It meets automotive environmental requirements including operating temperature from -55 °C to +150 °C, MSL Level 1 moisture sensitivity, and Sn (e3) lead-free termination - all documented in Vishay's GSOT03C to GSOT36C datasheet revision 3.0.
What is the typical capacitance of the GSOT03C-E3-18 at 0 V bias?
The typical capacitance (CD) of the GSOT03C-E3-18 at 0 V reverse bias and 1 MHz is 420 pF, with a maximum of 600 pF. This value is measured across each line-to-ground path (pin 1–3 or pin 2–3) and directly impacts signal integrity on low-speed buses like I²C or UART; it is intentionally higher than single-line alternatives to maintain robust ESD energy absorption capability.
GSOT03C-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):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 4V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 30A (8/20µs)
- Power - Peak Pulse:
- 369W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 420pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT03C-E3-18 FAQ
1.How can I place an order for GSOT03C-E3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT03C-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 GSOT03C-E3-18 reliable?
The price and inventory of GSOT03C-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 GSOT03C-E3-18 is usually 5 days.
3.What payment methods are accepted for GSOT03C-E3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT03C-E3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT03C-E3-18?
GSOT03C-E3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT03C-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 GSOT03C-E3-18?
For technical support, including GSOT03C-E3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT03C-E3-18 requirements.
6.How does Aetrix verify that GSOT03C-E3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT03C-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 GSOT03C-E3-18 meets industry standards.
7.What is the process for return or replacement of GSOT03C-E3-18?
All GSOT03C-E3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT03C-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 GSOT03C-E3-18 part is unused and in its original packaging.
Return procedure for GSOT03C-E3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT03C-E3-18 Tags
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