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Vishay General Semiconductor - Diodes Division VGSOT04-HG3-18
- Part No.:
- VGSOT04-HG3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
VGSOT04-HG3-18.pdf
- Description:
- TVS DIODE 4VWM 14.3VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,008
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Product details
Overview
VGSOT04-HG3-18 from Vishay Semiconductors is a unidirectional single-line ESD protection diode in SOT-23 package, rated for 4 V reverse stand-off voltage (VRWM), ±30 kV IEC 61000-4-2/ISO 10605 ESD immunity, and 540 W peak pulse power (8/20 μs). It delivers 40 A peak pulse current and clamps transients to ≤13.5 V at 40 A, enabling robust protection of low-voltage USB, I²C, and GPIO interfaces in automotive infotainment and industrial control modules.
For engineers reviewing the VGSOT04-HG3-18 datasheet, VGSOT04-HG3-18 pinout, VGSOT04-HG3-18 application, or VGSOT04-HG3-18 equivalent, this page provides verified electrical specs, BiAs-mode clamping behavior, SOT-23 terminal mapping, AEC-Q101 qualification status, and direct alternatives for ESD-hardened signal line design.
Technical Context
The VGSOT04-HG3-18 implements Bidirectional Asymmetrical (BiAs) protection mode: pin 1 is ground, pin 3 connects to the protected line, and clamping occurs at 6.5–8 V (reverse) and ≤1.2 V (forward) under 1 A transient. Its 360–450 pF capacitance at 0 V bias supports high-speed data lines up to 10 Mbps without signal integrity degradation.
Designed for AEC-Q101 qualification, it sustains junction temperatures from –55 °C to +150 °C and meets MSL level 1 moisture sensitivity with peak reflow tolerance up to 260 °C. The e3 Sn termination ensures RoHS-compliant, lead-free solderability on standard PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 4 V - Maximum continuous operating voltage before leakage exceeds 20 μA; sets upper limit for protected signal rail (e.g., 3.3 V logic). |
| VBR (min) | 5 V - Reverse breakdown threshold at 1 mA; ensures reliable turn-on during ESD events above system voltage. |
| VC @ 40 A | ≤13.5 V - Clamping voltage under worst-case 8/20 μs surge; limits stress on downstream ICs like microcontrollers or transceivers. |
| Capacitance @ 0 V | 360–450 pF - Low enough to avoid signal rise-time degradation on 10–25 MHz digital buses (e.g., I²C, SPI). |
| ESD Immunity | ±30 kV contact/air discharge - Meets IEC 61000-4-2 Level 4 and ISO 10605 for automotive and industrial environments. |
| TJ max | +150 °C - Enables operation in under-hood automotive locations and thermally constrained industrial enclosures. |
Pinout & Package
SOT-23 package: 3-pin, surface-mount, green molding compound (UL 94 V-0), 9.2 mg weight, MSL level 1, compatible with standard 8 mm tape-and-reel handling (3K per 7″ reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Ground (cathode connection) | Low-inductance return path for ESD current; must be connected to solid system ground plane. |
| Pin 2 | No internal connection | Thermal pad not electrically tied; may be left floating or grounded for thermal enhancement if PCB layout permits. |
| Pin 3 | Anode (protected line input) | Connects directly to signal/data line (e.g., USB D+, I²C SDA); clamps negative transients to ~1.2 V forward drop. |
Key Features
| Feature | Design Value |
|---|---|
| BiAs-mode clamping | Asymmetric forward/reverse clamping (≤1.2 V / ≤13.5 V) enables precise protection of unidirectional logic rails without false triggering. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment, body control modules, and ADAS sensor interfaces. |
| e3 Sn termination | Lead-free, matte tin plating ensures compatibility with Pb-free reflow profiles and eliminates whisker risk. |
| MSL level 1 rating | Zero bake requirement before assembly; supports standard SMT processes without moisture-related popcorning. |
Applications
| USB 2.0 Data Lines | I²C Bus Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines in automotive USB host ports against ESD events during cable insertion or hot-plug. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between connector and USB transceiver IC. Use Value: Limits clamping voltage to ≤13.5 V at 40 A, preventing latch-up or damage to USB PHY while maintaining <450 pF loading for full-speed (480 Mbps) compliance. |
Use Scenario: Safeguarding SDA/SCL lines in industrial PLC I/O modules exposed to field wiring ESD. IC Role / Device Role / Timing Role: Single-line ESD clamp on each bidirectional I²C line, grounded via shortest possible trace. Use Value: 360–450 pF capacitance avoids timing violations on 400 kHz standard-mode I²C; ±30 kV immunity exceeds IEC 61000-4-2 Level 4 requirements. |
| Automotive GPIO Interfaces | Industrial Sensor Signal Conditioning |
Use Scenario: Shielding microcontroller GPIO pins driving LED indicators or receiving switch inputs in vehicle dashboards. IC Role / Device Role / Timing Role: Point-of-entry ESD protection diode mounted adjacent to connector or switch pad. Use Value: 4 V VRWM matches 3.3 V MCU I/O voltage; 5 V VBR ensures fast turn-on before rail overvoltage damages internal ESD structures. |
Use Scenario: Protecting analog sensor outputs (e.g., temperature, pressure) routed across noisy factory floors. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on signal line before op-amp buffer or ADC input. Use Value: ≤1.2 V forward clamping prevents negative excursions from disrupting precision analog front-ends; 150 °C TJ max supports operation near motors or power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF4.0A-T | Higher VRWM (4.0 V same), but lower PPPM (400 W vs. 540 W); 500 pF capacitance at 0 V vs. 360–450 pF. | Less suitable for high-speed buses due to higher capacitance; adequate for <1 Mbps GPIO or RS-232. | Select when cost priority outweighs speed or surge margin; verify layout for higher thermal impedance. |
| TPD1E10B06DPYR | Lower VRWM (3.6 V), lower VC (≤7.5 V @ 4 A), but only 12 pF capacitance; rated for 12 kV contact ESD (vs. ±30 kV). | Better for ultra-high-speed interfaces (USB 3.0, HDMI), but insufficient for automotive-level ESD robustness. | Choose for consumer electronics with tight capacitance budgets; avoid where ISO 10605 or AEC-Q101 compliance is mandatory. |
Compared with SMF4.0A-T and TPD1E10B06DPYR, the VGSOT04-HG3-18 uniquely balances 540 W surge capability, ±30 kV ESD immunity, and sub-450 pF loading-making it optimal for automotive-grade 3.3 V data lines requiring both speed and ruggedness.
Availability
VGSOT04-HG3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial I²C sensor networks, and embedded GPIO protection requiring stable component supply and long-term lifecycle support.
Supply support for VGSOT04-HG3-18 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 VGSOT family targets high-surge, AEC-Q101-qualified ESD protection for signal lines in harsh environments-designed specifically to replace older TVS arrays with superior clamping accuracy and lower capacitance.
FAQ
What is the maximum reverse working voltage (VRWM) of the VGSOT04-HG3-18?
The VGSOT04-HG3-18 has a maximum reverse working voltage (VRWM) of 4 V, meaning it reliably blocks voltages up to 4 V in normal operation while maintaining leakage below 20 μA. This makes it ideal for protecting 3.3 V logic lines without false triggering during nominal operation. The VGSOT04-HG3-18 achieves this with a specified reverse breakdown voltage (VBR) of 5–7 V at 1 mA, ensuring safe margin above the VRWM threshold.
Does the VGSOT04-HG3-18 meet automotive qualification standards?
Yes, the VGSOT04-HG3-18 is AEC-Q101 qualified, confirming its reliability for automotive applications including engine control units, infotainment systems, and body electronics. It operates across –55 °C to +150 °C junction temperature and passes rigorous stress tests including temperature cycling, humidity bias, and mechanical shock. The VGSOT04-HG3-18 also complies with ISO 10605 for component-level ESD testing in vehicle environments.
How does the BiAs-mode clamping work in the VGSOT04-HG3-18?
The VGSOT04-HG3-18 uses Bidirectional Asymmetrical (BiAs) clamping: pin 1 is grounded, pin 3 connects to the signal line, and positive transients above VBR (~5–7 V) are shunted to ground via reverse conduction, while negative transients are clamped near 0 V by forward conduction (VF ≤ 1.2 V). This asymmetry allows precise protection of unidirectional signals without affecting DC bias. The VGSOT04-HG3-18 implements this using a single internal diode structure optimized for low forward voltage and controlled reverse breakdown.
What is the capacitance of the VGSOT04-HG3-18 at zero bias?
The VGSOT04-HG3-18 exhibits a typical capacitance of 360–450 pF at 0 V reverse bias and 1 MHz frequency, as specified in its electrical characteristics table. This value drops to ≤225 pF at 2 V bias, supporting clean signal integrity on moderate-speed digital interfaces such as I²C (up to 400 kHz) and UART. The VGSOT04-HG3-18's capacitance profile is intentionally tuned to balance ESD robustness and high-frequency performance without requiring external filtering.
Is the VGSOT04-HG3-18 compatible with standard SMT reflow processes?
Yes, the VGSOT04-HG3-18 is fully compatible with standard lead-free SMT reflow processes. It carries MSL level 1 rating per J-STD-020, requiring no pre-bake, and supports peak reflow temperatures up to 260 °C. Its e3 matte tin terminations ensure reliable wetting and intermetallic formation with SAC305 solder paste. The VGSOT04-HG3-18's SOT-23 footprint aligns with IPC-7351B recommendations, and its 9.2 mg mass enables consistent placement yield on automated pick-and-place equipment.
VGSOT04-HG3-18 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 4V (Max)
- Voltage - Breakdown (Min):
- 5V
- Voltage - Clamping (Max) @ Ipp:
- 13.5V
- Current - Peak Pulse (10/1000µs):
- 40A (8/20µs)
- Power - Peak Pulse:
- 540W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 360pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
VGSOT04-HG3-18 FAQ
1.How can I place an order for VGSOT04-HG3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VGSOT04-HG3-18 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 VGSOT04-HG3-18 reliable?
The price and inventory of VGSOT04-HG3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VGSOT04-HG3-18 is usually 5 days.
3.What payment methods are accepted for VGSOT04-HG3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VGSOT04-HG3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VGSOT04-HG3-18?
VGSOT04-HG3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VGSOT04-HG3-18 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 VGSOT04-HG3-18?
For technical support, including VGSOT04-HG3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VGSOT04-HG3-18 requirements.
6.How does Aetrix verify that VGSOT04-HG3-18 is sourced from the original manufacturer or authorized distributors?
All VGSOT04-HG3-18 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 VGSOT04-HG3-18 meets industry standards.
7.What is the process for return or replacement of VGSOT04-HG3-18?
All VGSOT04-HG3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VGSOT04-HG3-18, 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 VGSOT04-HG3-18 part is unused and in its original packaging.
Return procedure for VGSOT04-HG3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VGSOT04-HG3-18 Tags
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