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Vishay General Semiconductor - Diodes Division GSOT15C-HG3-18
- Part No.:
- GSOT15C-HG3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT15C-HG3-18.pdf
- Description:
- TVS DIODE 15VWM 28.8VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,942
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Product details
Overview
GSOT15C-HG3-18 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, 15 V reverse stand-off voltage (VRWM), 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-HG3-18 datasheet, GSOT15C-HG3-18 pinout, GSOT15C-HG3-18 application, or GSOT15C-HG3-18 equivalent, key selection criteria include clamping voltage at 8 A (24.8–28.8 V), low 1 μA leakage at 15 V, 90–120 pF capacitance at 0 V, BiAs-mode dual-line operation, and AEC-Q101 qualification readiness.
Technical Context
The GSOT15C-HG3-18 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 operation when pin 3 is left unconnected and pins 1–2 form a symmetrical path, delivering matched positive/negative clamping (e.g., 26.6–30.6 V at 8 A). Both modes operate across –55 °C to +150 °C junction temperature with MSL level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD immunity | ±30 kV contact & air discharge per IEC 61000-4-2 - meets industrial and automotive ESD robustness requirements without external shielding. |
| Reverse stand-off voltage (VRWM) | 15 V - ensures no conduction during normal 15 V rail or data line operation, preserving signal integrity. |
| Peak pulse current (IPPM) | 8 A per line (IEC 61000-4-5, 8/20 μs) - handles surge events in CAN, RS-485, and industrial I/O interfaces. |
| Clamping voltage (VC) | 24.8–28.8 V at 8 A - limits transient voltage to safe levels for 24 V system receivers and transceivers. |
| Capacitance (CD) | 90–120 pF at 0 V, 35 pF at 7.5 V - balances ESD protection strength with minimal signal distortion on ≤10 Mbps data lines. |
| Leakage current (IR) | ≤1 μA at 15 V - prevents DC loading on high-impedance sensor or analog front-end circuits. |
| Package | SOT-23 - enables compact PCB layout, compatibility with standard pick-and-place equipment, and thermal performance up to 150 °C TJ. |
Pinout & Package
SOT-23 package: 3-pin surface-mount, 2.8 × 2.35 × 1.15 mm body, e3 Sn plating, UL 94 V-0 molding compound, 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 half of BiAs path to ground (pin 3). |
| Pin 3 | Ground reference | Must be connected to low-impedance system ground; provides return path for ESD current in BiAs mode. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line ESD protection | Simultaneously safeguards differential pairs (e.g., RS-485 A/B, CAN H/L) with shared ground reference-reduces component count vs. discrete diodes. |
| Bidirectional asymmetrical (BiAs) clamping | Clamps negative transients near ground (≤1.8 V at 8 A) while limiting positive transients to ≤28.8 V-preserves logic low margins and avoids false triggering. |
| AEC-Q101 qualification ready | Meets stress test requirements for automotive under-hood and infotainment applications; qualified variants available with -HG3 suffix. |
| Low capacitance at operating bias | 35 pF at 7.5 V reverse bias-minimizes signal rise-time degradation on 10–25 Mbps serial links. |
| Space-saving SOT-23 footprint | Replaces larger SO-8 or SC-74 packages; enables routing of protected traces beneath device-critical for dense USB or display interface layouts. |
Applications
| Industrial RS-485 Interface | Automotive USB 2.0 Port |
|---|---|
Use Scenario: Protecting full-duplex RS-485 transceivers in factory automation PLCs exposed to cable discharge events. IC Role / Device Role / Timing Role: Two-line ESD clamp on A/B differential pair, referenced to chassis ground. Use Value: Limits transient voltage to ≤28.8 V during 8 A surges, preventing latch-up or damage to MAX13487E-level transceivers operating at 3.3 V or 5 V supplies. |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in vehicle infotainment head units subject to hot-plug ESD. IC Role / Device Role / Timing Role: BiAs-mode protector between USB connector and USB PHY, with pin 3 grounded to shield plane. Use Value: Delivers ±30 kV ESD immunity while maintaining <100 pF capacitance-ensuring signal integrity for 480 Mbps high-speed signaling. |
| Smart Meter Communication Port | Medical Sensor Data Link |
Use Scenario: Securing optical or RF communication ports (e.g., M-Bus, LoRaWAN) on utility smart meters installed in electrically noisy substations. IC Role / Device Role / Timing Role: Dual-line transient suppressor on bidirectional data bus, grounded to meter's isolated earth reference. Use Value: Withstands 8 A 8/20 μs surges per IEC 61000-4-5 and exhibits only 1 μA leakage at 15 V-preserving battery life in long-life deployments. |
Use Scenario: Shielding analog/digital sensor interfaces (e.g., SPI-based temperature or pressure sensors) in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-capacitance ESD guard on sensor output lines, placed adjacent to connector to minimize stub length. Use Value: 35 pF capacitance at 7.5 V bias avoids signal attenuation on 1–10 MHz sensor waveforms, while ±30 kV rating exceeds IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT15C-HG3-18 | Successor series with identical SOT-23 footprint, same VRWM (15 V), but improved 10 kV HBM ESD rating and tighter VC distribution (24.5–27.5 V at 8 A). | Drop-in replacement for new designs; not recommended for legacy boards requiring exact GSOT15C parametric consistency. | Select for new automotive or industrial designs where extended lifecycle support beyond January 2025 is required. |
| SMF15CTHE3_A/H | Single-line 15 V TVS (SMA package), 12 A IPPM, 25.1 V VC at 8 A, 150 pF @ 0 V-higher capacitance and different form factor. | Requires two devices for dual-line protection; unsuitable for space-constrained USB or RS-485 layouts. | Use only when BiAs functionality is unnecessary and board area allows SMA placement. |
Compared with GSOT15C-HG3-18, VGSOT15C-HG3-18 offers extended product lifetime and tighter clamping control but requires validation for HBM-sensitive systems; SMF15CTHE3_A/H delivers higher surge rating but doubles component count and increases trace capacitance by >60%.
Availability
GSOT15C-HG3-18 is available at Aetrix Electronics and suitable for industrial RS-485 interfaces, automotive USB 2.0 ports, and smart meter communication ports requiring stable component supply through end-of-life in January 2025.
Supply support for GSOT15C-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 power management, sensing, and circuit protection components with broad automotive, industrial, and computing qualifications.
The GSOTxxC family was engineered for compact, high-reliability ESD protection of differential data buses-including USB, RS-485, CAN, and HDMI-where low capacitance, precise clamping, and AEC-Q101 readiness are critical.
FAQ
What is the maximum operating temperature for GSOT15C-HG3-18?
The GSOT15C-HG3-18 has a junction temperature range of –55 °C to +150 °C, making it suitable for under-hood automotive environments and industrial enclosures without forced cooling. This rating is validated per AEC-Q101 stress testing protocols and applies across its full electrical specification range.
Does GSOT15C-HG3-18 support both differential and single-ended protection configurations?
Yes, GSOT15C-HG3-18 supports two distinct modes: BiAs-MODE (pins 1 & 2 to signal lines, pin 3 to ground) for differential pair protection, and BiSy-MODE (pin 1 to signal, pin 2 to ground, pin 3 open) for single-ended lines. Each mode delivers specified clamping performance per the datasheet's dual-characterization tables.
What is the clamping voltage of GSOT15C-HG3-18 at 8 A peak pulse current?
In BiAs-MODE (pins 1–3 or 2–3), the reverse clamping voltage (VC) of GSOT15C-HG3-18 is 24.8–28.8 V at 8 A (IEC 61000-4-5, 8/20 μs). In BiSy-MODE (pins 1–2), VC is 26.6–30.6 V at the same current-values confirmed in the "ELECTRICAL CHARACTERISTICS GSOT15C" section of document 85824.
Is GSOT15C-HG3-18 RoHS-compliant and lead-free?
Yes, GSOT15C-HG3-18 carries the "HG3" environmental code, indicating RoHS-compliant, lead-free construction with matte tin (e3) plating. It meets JEDEC J-STD-020 MSL level 1 requirements and supports peak reflow temperatures up to 260 °C.
What is the capacitance of GSOT15C-HG3-18 at 7.5 V reverse bias?
At 7.5 V reverse bias and 1 MHz frequency, the typical capacitance (CD) of GSOT15C-HG3-18 is 35 pF. This low-bias capacitance minimizes signal distortion on high-speed data lines and is explicitly specified in the "ELECTRICAL CHARACTERISTICS GSOT15C" table for VR = 7.5 V.
GSOT15C-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:
- 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-HG3-18 FAQ
1.How can I place an order for GSOT15C-HG3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT15C-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 GSOT15C-HG3-18 reliable?
The price and inventory of GSOT15C-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 GSOT15C-HG3-18 is usually 5 days.
3.What payment methods are accepted for GSOT15C-HG3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT15C-HG3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT15C-HG3-18?
GSOT15C-HG3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT15C-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 GSOT15C-HG3-18?
For technical support, including GSOT15C-HG3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT15C-HG3-18 requirements.
6.How does Aetrix verify that GSOT15C-HG3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT15C-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 GSOT15C-HG3-18 meets industry standards.
7.What is the process for return or replacement of GSOT15C-HG3-18?
All GSOT15C-HG3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT15C-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 GSOT15C-HG3-18 part is unused and in its original packaging.
Return procedure for GSOT15C-HG3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT15C-HG3-18 Tags
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