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Vishay General Semiconductor - Diodes Division GSOT03C-HE3-18
- Part No.:
- GSOT03C-HE3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT03C-HE3-18.pdf
- Description:
- TVS DIODE 3.3VWM 12.3VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,126
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Product details
Overview
GSOT03C-HE3-18 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-HE3-18 datasheet, GSOT03C-HE3-18 pinout, GSOT03C-HE3-18 application, or GSOT03C-HE3-18 equivalent, key selection criteria include its 3.3 V VRWM compatibility with 3.3 V logic systems, BiAs-mode dual-line clamping behavior, 420–600 pF capacitance at 0 V bias, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The GSOT03C-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 each line to ground with distinct forward/reverse thresholds. Its architecture uses paired avalanche diodes sharing a common cathode (pin 3), delivering 5.7 V typical reverse clamping at 1 A and 1 V forward clamping at 1 A.
When configured in BiSy-MODE (single-line symmetrical), pin 3 is left unconnected, and pins 1–2 form a bipolar clamp with 3.8 V VRWM and 7.0 V typical reverse clamping at 1 A - supporting legacy RS-232 or CAN FD physical layer protection where balanced transients dominate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±30 kV contact & air discharge per IEC 61000-4-2 - meets Level 4 immunity for external ports in automotive ECUs and medical handhelds. |
| VRWM (BiAs mode) | 3.3 V - matches standard 3.3 V I/O rails without leakage-induced logic errors or false triggering. |
| IPPM (line-to-ground) | 30 A per path (8/20 μs) - sustains multiple ESD events in high-noise factory-floor HMI interfaces. |
| Clamping Voltage VC | 10 V max at 30 A (line-to-ground) - limits downstream IC stress below 12 V absolute maximum ratings. |
| Capacitance CD | 420–600 pF at 0 V, 260 pF at 1.6 V - optimized for <10 Mbps digital lines; avoids signal integrity degradation on USB 2.0 D+/D−. |
| AEC-Q101 Qualified | Qualified per AEC-Q101 Rev D - validated for under-hood temperature cycling (-55 °C to +150 °C junction). |
| Package | SOT-23 (JEDEC TO-236AB) - enables compact 2.8 mm × 2.9 mm PCB footprints with standard reflow compatibility (MSL level 1, 260 °C peak). |
Pinout & Package
SOT-23 package: 3-pin surface-mount plastic case with gull-wing leads, 1.43 mm pitch, 2.8 mm × 2.9 mm body, MSL level 1, lead-free (e3 Sn plating), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Line 1 protection diode | Connects to first protected signal (e.g., USB D+); forms low-impedance path to ground during positive transients. |
| Pin 2 | Anode of Line 2 protection diode | Connects to second protected signal (e.g., USB D−); operates independently from Pin 1 under BiAs mode. |
| Pin 3 | Common cathode / Ground reference | Mandatory ground connection in BiAs mode; must be left floating in BiSy single-line configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line ESD protection | Simultaneous protection of differential pairs (e.g., I²C SDA/SCL) with shared ground return, reducing component count vs. discrete diodes. |
| Bidirectional asymmetrical (BiAs) clamping | Enables 1 V forward clamping for negative transients and ~10 V reverse clamping for positive transients - preserving signal swing headroom in 3.3 V systems. |
| Low leakage at VRWM | 100 μA max reverse current at 3.3 V - prevents bus contention or power drain in always-on sensor interfaces. |
| High surge robustness | 369 W peak pulse power (line-to-ground) - withstands repeated ESD strikes in unshielded industrial fieldbus nodes. |
| AEC-Q101 qualification | Validated for automotive applications including infotainment displays and ADAS camera links requiring extended temperature operation. |
Applications
| USB 2.0 Interface Protection | HDMI DDC Channel Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− lines in automotive head units exposed to human-body ESD during cable insertion. IC Role / Device Role / Timing Role: Primary ESD shunt placed immediately before USB transceiver IC, clamping transients before they reach PHY input stages. Use Value: 3.3 V VRWM ensures no DC loading on 3.3 V USB PHY I/O; 420–600 pF capacitance maintains signal rise/fall times within USB 2.0 specification (≤1 ns). | Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) in commercial digital signage controllers. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on 5 V-tolerant I²C bus operating at 100 kHz, preventing latch-up in EEPROM and timing controller. Use Value: 3.3 V VRWM aligns with DDC logic levels; ±30 kV ESD rating exceeds IEC 61000-4-2 Level 4 requirements for public-access displays. |
| Automotive Infotainment Touchscreen Interface | Industrial I²C Sensor Hub |
Use Scenario: Shielding capacitive touchscreen controller I²C lines from ESD induced by user finger contact in vehicle cabins. IC Role / Device Role / Timing Role: Two-line ESD clamp between touchscreen digitizer and SoC, operating in BiAs mode with dedicated ground plane connection. Use Value: AEC-Q101 qualification guarantees reliability across -40 °C to +85 °C ambient; 30 A IPPM handles worst-case coupling from adjacent high-current modules. | Use Scenario: Protecting multi-sensor I²C bus (temperature, humidity, pressure) in programmable logic controller (PLC) backplanes. IC Role / Device Role / Timing Role: Single-component solution for dual-line protection, eliminating need for two discrete TVS diodes and saving 2.5 mm² PCB area. Use Value: 100 μA max IR at 3.3 V prevents cumulative leakage across 16-node daisy-chained sensors; SOT-23 allows automated placement in high-volume manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT03C-G3-18 | Same electrical specs and SOT-23 package; green (halogen-free) molding compound vs. standard UL 94 V-0 compound in GSOT03C-HE3-18. | Required for RoHS-compliant, halogen-free BOMs in EU medical devices; identical performance in ESD clamping and thermal derating. | Select VGSOT03C-G3-18 when environmental compliance mandates halogen-free materials without sacrificing protection capability. |
| SMF3.3A-TP | Single-line 3.3 V TVS diode (SOD-123), 30 kV ESD rating, but only one protection path and higher 12.5 V clamping at 30 A. | Suitable for point-of-use protection on individual lines where space permits discrete placement; lacks dual-line integration. | Choose SMF3.3A-TP only when protecting non-differential signals or when board layout cannot accommodate dual-line routing to a common ground. |
Compared with VGSOT03C-G3-18, GSOT03C-HE3-18 offers identical ESD performance and pinout but uses standard flame-retardant compound - making it preferable for cost-sensitive industrial designs where halogen-free is not mandated. Against SMF3.3A-TP, GSOT03C-HE3-18 delivers integrated dual-line protection with lower clamping voltage and reduced PCB footprint.
Availability
GSOT03C-HE3-18 is available at Aetrix Electronics and suitable for automotive infotainment, industrial I²C sensor networks, and consumer USB interface designs requiring stable component supply through end-of-life in January 2025.
Supply support for GSOT03C-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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The GSOTxxC family was engineered specifically for compact, high-density ESD protection of differential and single-ended data buses - balancing low capacitance, precise clamping, and AEC-Q101 qualification for harsh-environment electronics.
FAQ
What is the maximum operating temperature range for GSOT03C-HE3-18?
The GSOT03C-HE3-18 supports a junction temperature range of -55 °C to +150 °C, verified per AEC-Q101 stress testing. This enables deployment in under-hood automotive modules and industrial motor drives where ambient temperatures exceed 105 °C. The SOT-23 package's thermal resistance (RθJA ≈ 250 °C/W) requires minimal copper pour for full-rated operation at +150 °C junction.
How does GSOT03C-HE3-18 differ from GSOT05C-HE3-18 in practical circuit design?
GSOT03C-HE3-18 has a 3.3 V VRWM and 4.0–5.5 V VBR, targeting 3.3 V logic systems, while GSOT05C-HE3-18 specifies 5.0 V VRWM and 6.0–8.0 V VBR for 5 V interfaces. Their pinouts and packages are identical, but substituting GSOT05C-HE3-18 in a 3.3 V design risks false triggering due to lower margin between VRWM and system rail, increasing standby leakage and potential signal corruption.
Can GSOT03C-HE3-18 be used for single-line protection, and what changes are required?
Yes - GSOT03C-HE3-18 supports BiSy-MODE single-line protection: leave pin 3 unconnected, and use pins 1 and 2 as a bipolar clamp. In this configuration, VRWM increases to 3.8 V, VBR to 4.5–6.2 V, and clamping rises to 14 V at 30 A. This mode suits RS-232 or CAN FD PHY protection but sacrifices the low forward-voltage advantage of BiAs mode.
Is GSOT03C-HE3-18 compatible with lead-free reflow soldering processes?
Yes - GSOT03C-HE3-18 features e3 matte tin plating and is qualified for peak reflow temperatures up to 260 °C (per J-STD-020 MSL level 1). Its SOT-23 package withstands standard Pb-free profiles with 60–90 sec above 217 °C, and the UL 94 V-0 molding compound remains stable without delamination or popcorning.
What is the significance of the "HE3" suffix in GSOT03C-HE3-18?
The "HE3" suffix denotes Vishay's standard packaging and environmental coding: "H" = halogen-free option (green compound), "E3" = lead-free, matte tin (Sn) termination per JEDEC J-STD-020. The "-18" indicates tape-and-reel packaging in 10 k per 13″ reel - distinct from "-08" (3 k per 7″ reel). GSOT03C-HE3-18 is therefore halogen-free, RoHS-compliant, and supplied in high-volume reels.
GSOT03C-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):
- 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:
- -
- Capacitance @ Frequency:
- 420pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT03C-HE3-18 FAQ
1.How can I place an order for GSOT03C-HE3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT03C-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 GSOT03C-HE3-18 reliable?
The price and inventory of GSOT03C-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 GSOT03C-HE3-18 is usually 5 days.
3.What payment methods are accepted for GSOT03C-HE3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT03C-HE3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT03C-HE3-18?
GSOT03C-HE3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT03C-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 GSOT03C-HE3-18?
For technical support, including GSOT03C-HE3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT03C-HE3-18 requirements.
6.How does Aetrix verify that GSOT03C-HE3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT03C-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 GSOT03C-HE3-18 meets industry standards.
7.What is the process for return or replacement of GSOT03C-HE3-18?
All GSOT03C-HE3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT03C-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 GSOT03C-HE3-18 part is unused and in its original packaging.
Return procedure for GSOT03C-HE3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT03C-HE3-18 Tags
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