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Vishay General Semiconductor - Diodes Division GSOT15C-HE3-18
- Part No.:
- GSOT15C-HE3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT15C-HE3-18.pdf
- Description:
- TVS DIODE 15VWM 28.8VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,851
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Product details
Overview
GSOT15C-HE3-18 from Vishay Semiconductors is a two-line bidirectional asymmetrical ESD protection diode in SOT-23 package, rated for 15 V reverse stand-off voltage (VRWM), ±30 kV IEC 61000-4-2 ESD immunity, and 8 A peak pulse current (IPPM). It protects high-speed data lines such as USB 2.0 or RS-485 interfaces against transient overvoltage events.
For engineers reviewing the GSOT15C-HE3-18 datasheet, GSOT15C-HE3-18 pinout, GSOT15C-HE3-18 application, or GSOT15C-HE3-18 equivalent, key selection criteria include clamping voltage at 8 A (24.8–28.8 V), low 90–120 pF capacitance at 0 V bias, AEC-Q101 qualification, SOT-23 footprint compatibility, and BiAs-mode dual-line protection capability.
Technical Context
The GSOT15C-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 conduction). Its asymmetry yields lower forward clamping (~1.8 V at 8 A) versus reverse clamping (~24.8–28.8 V).
It supports BiSy-MODE (single-line symmetrical) operation when pin 3 is left unconnected and pins 1–2 form a line-to-ground path, delivering matched ±26.6–30.6 V clamping at 8 A with 45–60 pF capacitance - optimized for 15.5 V VRWM applications like industrial CAN or LIN bus nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protection Type | Two-line bidirectional asymmetrical (BiAs) or one-line bidirectional symmetrical (BiSy) |
| Reverse Stand-off Voltage (VRWM) | 15 V (BiAs mode); 15.5 V (BiSy mode) - defines maximum continuous operating voltage before clamping initiates |
| Peak Pulse Current (IPPM) | 8 A (8/20 μs waveform) - sustains surge energy without failure in telecom/data line protection |
| Clamping Voltage (VC) | 24.8–28.8 V at 8 A (BiAs); 26.6–30.6 V at 8 A (BiSy) - limits voltage seen by downstream ICs during ESD event |
| Capacitance (CD) | 90–120 pF at 0 V (BiAs); 45–60 pF at 0 V (BiSy) - enables use on 480 Mbps USB 2.0 or 10 Mbps RS-485 links |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 system-level ESD requirements |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood and infotainment interface applications |
Pinout & Package
SOT-23 package (JEDEC TO-236AB), 3-terminal surface-mount device with standard footprint: 2.8–3.1 mm length, 1.15–1.20 mm width, 0.9–1.0 mm height, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Line 1 Anode (BiAs) / Line Terminal (BiSy) | Connects to first protected signal line (e.g., USB D+) or forms one side of symmetrical protection path |
| Pin 2 | Line 2 Anode (BiAs) / Ground Terminal (BiSy) | Connects to second protected signal line (e.g., USB D−) or ground in BiSy configuration |
| Pin 3 | Common Cathode (BiAs) / NC (BiSy) | Ground reference for dual-line clamping; must be connected in BiAs mode, left floating in BiSy mode |
Key Features
| Feature | Design Value |
|---|---|
| BiAs-MODE dual-line protection | Enables simultaneous protection of differential pairs (e.g., USB, RS-485) with shared ground return and asymmetric clamping |
| Low clamping voltage in forward direction | 1.8 V max at 8 A IPP - minimizes stress on receiver inputs during negative ESD transients |
| Automotive-grade reliability | AEC-Q101 qualified with MSL level 1 rating and -55 °C to +150 °C operating range |
| Space-efficient SOT-23 footprint | Replaces discrete dual-diode arrays while maintaining PCB area < 3 mm² and compatible with automated assembly |
| e3 Sn plating | RoHS-compliant matte tin termination ensures solderability and intermetallic stability across reflow profiles |
Applications
| USB 2.0 Interface Protection | Industrial RS-485 Transceiver Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− lines on host/device ports against user-handling ESD events. IC Role / Device Role / Timing Role: Two-line ESD clamp placed between connector and transceiver IC, referenced to system ground. Use Value: 90–120 pF capacitance preserves signal integrity up to 480 Mbps; ±30 kV ESD rating meets IEC 61000-4-2 Level 4 compliance. |
Use Scenario: Safeguarding RS-485 transceiver A/B terminals in factory automation controllers exposed to cable discharge events. IC Role / Device Role / Timing Role: Bidirectional asymmetrical clamp connecting A/B lines to chassis ground, limiting transient voltage to <29 V. Use Value: 8 A IPPM handles induced surges from nearby motor switching; AEC-Q101 qualification supports extended temperature operation. |
| Automotive LIN Bus Node | Medical Sensor Interface Protection |
Use Scenario: ESD hardening of LIN bus transceivers in body control modules where space and reliability are critical. IC Role / Device Role / Timing Role: Single-line BiSy-mode clamp (pins 1–2, pin 3 open) protecting LIN line to ground. Use Value: 45–60 pF capacitance avoids signal distortion on 19.2 kbps LIN; -55 °C to +150 °C range matches under-hood thermal profile. |
Use Scenario: Protecting analog front-end inputs of portable medical sensors (e.g., ECG, pulse oximeter) from handling ESD. IC Role / Device Role / Timing Role: Low-leakage (<1 μA at 15 V) BiAs clamp isolating sensitive amplifier inputs from external connectors. Use Value: 1 μA IR ensures minimal DC loading on high-impedance sensor paths; 15 V VRWM accommodates 12 V supply-referenced designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT15C | Successor device in same SOT-23 package; identical VRWM (15 V), improved CD (85 pF typ. vs. 90–120 pF), and enhanced thermal robustness | Drop-in replacement for new designs; not recommended for legacy boards requiring exact parametric match to GSOT15C-HE3-18 | Select VGSOT15C for production ramp after January 2025; verify layout compatibility per updated thermal pad recommendations |
| SMF15A | Single-line unidirectional TVS; 15 V VBR, 12.5 A IPPM, but no BiAs/BiSy flexibility or low forward VF | Requires two devices for dual-line protection; higher clamping voltage (34.2 V min at 12.5 A) and 170 pF capacitance limit speed | Use only if BiAs functionality is unnecessary and board space allows dual-device placement |
Compared with SMF15A and VGSOT15C, the GSOT15C-HE3-18 uniquely delivers dual-line asymmetrical clamping in a single SOT-23, enabling compact USB/RS-485 protection with sub-2 V negative transient suppression - a capability neither alternative provides without added components or performance trade-offs.
Availability
GSOT15C-HE3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial RS-485 transceiver hardening, and automotive LIN bus node designs requiring stable component supply through its end-of-life date in January 2025.
Supply support for GSOT15C-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 high-density, low-capacitance ESD protection of high-speed data lines - balancing clamping performance, package size, and AEC-Q101 compliance for next-generation interface circuits.
FAQ
What is the maximum operating temperature range for the GSOT15C-HE3-18?
The GSOT15C-HE3-18 operates from -55 °C to +150 °C junction temperature, meeting AEC-Q101 requirements for automotive under-hood applications. This wide range ensures reliable performance in industrial controllers and medical equipment exposed to extreme ambient conditions. The SOT-23 package's MSL level 1 rating further supports robust reflow assembly.
Can the GSOT15C-HE3-18 protect both differential and single-ended signals?
Yes - the GSOT15C-HE3-18 supports two distinct configurations: BiAs-MODE (pins 1 & 2 to signal lines, pin 3 to ground) for differential pairs like USB D+/D−, and BiSy-MODE (pin 1 to line, pin 2 to ground, pin 3 open) for single-ended buses like LIN or CAN. Each mode uses the same die but different terminal connections to optimize clamping behavior.
What is the reverse leakage current specification for the GSOT15C-HE3-18 at 15 V?
The GSOT15C-HE3-18 exhibits ≤1 μA reverse leakage current (IR) at VR = 15 V, measured at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and prevents unwanted loading on precision analog circuits - a critical parameter for battery-powered medical and IoT devices.
How does the clamping voltage of the GSOT15C-HE3-18 compare between BiAs and BiSy modes?
In BiAs mode (dual-line), clamping voltage is 24.8–28.8 V at 8 A IPPM; in BiSy mode (single-line), it rises to 26.6–30.6 V at the same current. The difference arises from current splitting across two internal diodes in BiAs versus single-path conduction in BiSy - both values remain well below typical 3.3 V or 5 V IC damage thresholds.
Is the GSOT15C-HE3-18 RoHS-compliant and lead-free?
Yes - the GSOT15C-HE3-18 carries the "HE3" suffix indicating e3 matte tin (Sn) plating, fully compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-609. Its lead-free construction supports Pb-free reflow profiles up to 260 °C peak temperature, with MSL level 1 moisture sensitivity for unlimited floor life.
GSOT15C-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):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.5V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 345W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 90pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT15C-HE3-18 FAQ
1.How can I place an order for GSOT15C-HE3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT15C-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 GSOT15C-HE3-18 reliable?
The price and inventory of GSOT15C-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 GSOT15C-HE3-18 is usually 5 days.
3.What payment methods are accepted for GSOT15C-HE3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT15C-HE3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT15C-HE3-18?
GSOT15C-HE3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT15C-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 GSOT15C-HE3-18?
For technical support, including GSOT15C-HE3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT15C-HE3-18 requirements.
6.How does Aetrix verify that GSOT15C-HE3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT15C-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 GSOT15C-HE3-18 meets industry standards.
7.What is the process for return or replacement of GSOT15C-HE3-18?
All GSOT15C-HE3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT15C-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 GSOT15C-HE3-18 part is unused and in its original packaging.
Return procedure for GSOT15C-HE3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT15C-HE3-18 Tags
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