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Vishay General Semiconductor - Diodes Division GSOT24C-G3-18
- Part No.:
- GSOT24C-G3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT24C-G3-18.pdf
- Description:
- TVS DIODE 24VWM 47VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:40,148
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Product details
Overview
GSOT24C-G3-18 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, 24 V reverse stand-off voltage (VRWM), and 5 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 GSOT24C-G3-18 datasheet, GSOT24C-G3-18 pinout, GSOT24C-G3-18 application, or GSOT24C-G3-18 equivalent, this page delivers verified electrical specs, BiAs/BiSy dual-mode operation details, SOT-23 terminal mapping, real-world clamping behavior at 5 A surge, and qualified AEC-Q101 alternatives for automotive-grade designs.
Technical Context
The GSOT24C-G3-18 implements BiAs-MODE (Bidirectional Asymmetrical) protection when pin 3 is grounded and pins 1/2 connect to protected signal lines - delivering distinct forward (VF ≈ 1.4 V @ 5 A) and reverse (VC ≈ 41–47 V @ 5 A) clamping levels. Its low 65–80 pF capacitance at 0 V enables use on 24 V industrial data buses without signal integrity degradation.
In BiSy-MODE (single-line symmetrical), pin 3 is left unconnected and pins 1–2 form a bipolar clamp with 24.5 V VRWM and 33–40 pF capacitance - suitable for CAN FD or LIN bus protection where balanced positive/negative clamping is required.
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 industrial and automotive interfaces. |
| VRWM (BiAs mode) | 24 V - blocks normal 24 V system operating voltage while enabling fast response to transients above breakdown. |
| IPPM (BiAs mode) | 5 A per line (IEC 61000-4-5, 8/20 μs) - sustains short-duration surges common in factory automation environments. |
| Clamping Voltage VC | 41–47 V @ 5 A (BiAs) - limits voltage seen by downstream PHY to safe levels during surge events. |
| Capacitance CD | 65–80 pF @ 0 V, 1 MHz (BiAs) - low enough for <10 Mbps data rates on 24 V fieldbus links. |
| Operating Temp | −55 °C to +150 °C - supports under-hood automotive and industrial control cabinet deployment. |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
SOT-23 package (JEDEC TO-236AB), 3-terminal surface-mount device with standard footprint: 2.8 × 2.35 × 1.15 mm, gull-wing leads, MSL level 1, lead (Pb)-free Sn plating (e3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Line 1 Anode/Cathode | Connects to first protected signal line (L1); forms one half of BiAs clamp to ground (pin 3) or BiSy clamp to pin 2. |
| Pin 2 | Line 2 Anode/Cathode | Connects to second protected signal line (L2); symmetrically paired with pin 1 in BiAs mode or directly opposed in BiSy mode. |
| Pin 3 | Ground Reference | Must be connected to system ground in BiAs mode; left floating in BiSy mode to enable symmetrical clamping between pins 1–2. |
Key Features
| Feature | Design Value |
|---|---|
| Two-mode operation | BiAs (2-line asymmetrical) and BiSy (1-line symmetrical) configurations - single device serves dual protection topologies without redesign. |
| Low leakage current | IR ≤ 1 μA @ 24 V - prevents power loss and false triggering in always-on 24 V sensor interfaces. |
| High-temp reliability | Qualified to AEC-Q101 and rated for 150 °C junction temperature - suitable for engine control unit (ECU) and transmission control module (TCM) applications. |
| Space-efficient packaging | SOT-23 footprint saves >60% board area vs. discrete dual-diode solutions - critical for compact industrial I/O modules. |
| Robust surge handling | 235 W peak pulse power (pin 1–3) - withstands repetitive 24 V bus transients per ISO 7637-2 Pulse 1/2a/3a standards. |
Applications
| Industrial Fieldbus Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting RS-485 nodes in PLC backplanes exposed to ESD from operator touch and inductive switching noise. IC Role / Device Role / Timing Role: Two-line ESD clamp placed at connector entry point, shunting transients to chassis ground before reaching transceiver IC. Use Value: Maintains 24 V bus integrity with <80 pF loading, enabling reliable 10 Mbps communication even after repeated ±30 kV discharges. | Use Scenario: Safeguarding LIN bus signals between door modules and central body controller in harsh automotive environments. IC Role / Device Role / Timing Role: Single-device BiSy-mode clamp on LIN data line, providing symmetrical ±30 kV ESD suppression without polarity sensitivity. Use Value: Eliminates need for external series resistors or TVS arrays, reducing BOM count while meeting AEC-Q101 qualification for 15-year vehicle life. |
| 24 V Sensor Interface Protection | Factory Automation I/O Terminal |
Use Scenario: Shielding analog/digital inputs of 24 V industrial sensors (e.g., proximity switches, pressure transducers) from cable-borne surges. IC Role / Device Role / Timing Role: BiAs-mode clamp across signal and shield lines, referenced to local ground plane to suppress common-mode transients. Use Value: 24 V VRWM ensures no conduction during normal operation; 41 V clamping at 5 A prevents damage to 3.3 V/5 V microcontroller GPIOs downstream. | Use Scenario: Protecting digital input channels on modular I/O terminals subjected to frequent hot-plug and relay coil flyback events. IC Role / Device Role / Timing Role: Dual-channel ESD protector per input channel, placed immediately after screw-terminal block to intercept surges before PCB traces. Use Value: SOT-23 package allows dense placement near connectors; AEC-Q101 qualification guarantees long-term stability in uncooled control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT24C-G3-18 | Successor series with identical SOT-23 footprint, same VRWM (24 V), but improved 6 kV HBM ESD rating and lower 55 pF capacitance. | Drop-in replacement for new designs; requires validation for legacy rework due to minor parameter shifts. | Select for new automotive or industrial designs requiring extended lifecycle support beyond January 2025 EOL date. |
| SMF24A-T | Single-line 24 V TVS diode (SOD-123), 5.5 A IPPM, 400 W PPP, 150 pF capacitance - higher clamping (53 V @ 5 A) and larger package. | Limited to single-line protection; unsuitable for differential or dual-signal applications without duplication. | Use only when space permits larger package and dual-line protection is not required. |
Compared with VGSOT24C-G3-18, the original GSOT24C-G3-18 offers proven field reliability through 2024 but lacks the enhanced HBM rating and reduced capacitance of its successor; versus SMF24A-T, it provides true two-line integration and 50% lower capacitance - critical for high-speed 24 V data links.
Availability
GSOT24C-G3-18 is available at Aetrix Electronics and suitable for industrial fieldbus protection, automotive body control modules, 24 V sensor interface protection, and factory automation I/O terminals requiring stable component supply through its End-of-Life date in January 2025.
Supply support for GSOT24C-G3-18 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 developed specifically for robust, space-constrained ESD protection of 24 V and lower industrial data buses and automotive networks - emphasizing low capacitance, AEC-Q101 compliance, and dual-mode flexibility.
FAQ
What is the maximum operating temperature for the GSOT24C-G3-18?
The GSOT24C-G3-18 has a specified junction temperature range of −55 °C to +150 °C, making it suitable for under-hood automotive applications and industrial environments with elevated ambient temperatures. This rating is validated per AEC-Q101 stress testing protocols including high-temperature reverse bias (HTRB) and high-temperature gate bias (HTGB), ensuring long-term reliability at full thermal extremes. The GSOT24C-G3-18 maintains stable clamping performance across this entire range.
Does the GSOT24C-G3-18 support both bidirectional asymmetrical and symmetrical protection modes?
Yes, the GSOT24C-G3-18 supports two distinct protection configurations: BiAs-MODE (bidirectional asymmetrical) when pin 3 is grounded and pins 1/2 protect separate signal lines, and BiSy-MODE (bidirectional symmetrical) when pin 3 is left unconnected and pins 1–2 form a single bipolar clamp. Each mode uses the same internal diode structure but different external connections - enabling flexible deployment without changing bill of materials. The GSOT24C-G3-18 datasheet specifies separate electrical characteristics for both modes.
What is the reverse leakage current specification for the GSOT24C-G3-18 at 24 V?
The GSOT24C-G3-18 exhibits a maximum reverse leakage current (IR) of 1 μA when biased at its rated 24 V reverse stand-off voltage (VRWM), measured at Tamb = 25 °C. This ultra-low leakage ensures minimal power drain in always-on 24 V systems and prevents false triggering of downstream comparators or ADC references. The value is confirmed in the "ELECTRICAL CHARACTERISTICS GSOT24C" table on page 7 of the official Vishay document 85824.
Is the GSOT24C-G3-18 qualified to AEC-Q101 standards?
Yes, the GSOT24C-G3-18 is explicitly qualified to AEC-Q101 for automotive applications. The Vishay documentation confirms qualification status in the "FEATURES" section and "PACKAGE DATA" table, listing AEC-Q101 as an available environmental and quality option. This includes full stress testing for high-temperature operation, humidity resistance, mechanical shock, and ESD robustness - validating suitability for engine control, body electronics, and ADAS subsystems. The GSOT24C-G3-18 part number suffix "G3" denotes green (lead-free) and AEC-Q101-compliant variants.
What is the typical capacitance of the GSOT24C-G3-18 at 0 V bias and 1 MHz?
The typical capacitance of the GSOT24C-G3-18 is 65–80 pF when measured at 0 V reverse bias and 1 MHz frequency in BiAs-MODE (pins 1–3 or 2–3), as specified in the "ELECTRICAL CHARACTERISTICS GSOT24C" table on page 7 of Vishay document 85824. This low capacitance enables use on 24 V data lines up to 10 Mbps without signal rise-time degradation. In BiSy-MODE (pins 1–2), capacitance drops to 33–40 pF - further optimizing high-frequency transient suppression.
GSOT24C-G3-18 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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 47V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 235W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 65pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT24C-G3-18 FAQ
1.How can I place an order for GSOT24C-G3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT24C-G3-18 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 GSOT24C-G3-18 reliable?
The price and inventory of GSOT24C-G3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GSOT24C-G3-18 is usually 5 days.
3.What payment methods are accepted for GSOT24C-G3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT24C-G3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT24C-G3-18?
GSOT24C-G3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT24C-G3-18 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 GSOT24C-G3-18?
For technical support, including GSOT24C-G3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT24C-G3-18 requirements.
6.How does Aetrix verify that GSOT24C-G3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT24C-G3-18 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 GSOT24C-G3-18 meets industry standards.
7.What is the process for return or replacement of GSOT24C-G3-18?
All GSOT24C-G3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT24C-G3-18, 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 GSOT24C-G3-18 part is unused and in its original packaging.
Return procedure for GSOT24C-G3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT24C-G3-18 Tags
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