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Vishay General Semiconductor - Diodes Division GSOT12C-HE3-18
- Part No.:
- GSOT12C-HE3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT12C-HE3-18.pdf
- Description:
- TVS DIODE 12VWM 26VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,822
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Product details
Overview
GSOT12C-HE3-18 from Vishay Semiconductors is a two-line bidirectional asymmetrical ESD protection diode in SOT-23 package, rated for 12 V reverse stand-off voltage (VRWM), ±30 kV IEC 61000-4-2 ESD immunity, and 12 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 GSOT12C-HE3-18 datasheet, GSOT12C-HE3-18 pinout, GSOT12C-HE3-18 application, or GSOT12C-HE3-18 equivalent, this page delivers verified electrical specs, BiAs/BiSy dual-mode operation details, SOT-23 terminal mapping, automotive-grade AEC-Q101 qualification status, and validated alternative parts for design continuity planning ahead of its January 2025 end-of-life.
Technical Context
The GSOT12C-HE3-18 implements BiAs-MODE (Bidirectional Asymmetrical) protection when pin 3 is grounded and pins 1/2 protect two independent signal lines - delivering distinct clamping voltages for positive (reverse-biased) and negative (forward-biased) transients. Its low 1.2 V forward clamping at 12 A enables robust protection of 12 V logic and industrial I/O without signal distortion.
In BiSy-MODE (single-line symmetrical), pin 3 is left unconnected and pins 1–2 form a bipolar clamp with matched positive/negative clamping behavior, supporting CAN bus or analog sensor line protection where balanced voltage limiting is required. Both modes leverage the same monolithic dual-diode structure in SOT-23.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protection Type | Two-line bidirectional asymmetrical (BiAs) or one-line bidirectional symmetrical (BiSy) |
| VRWM | 12 V - maximum continuous working voltage on protected lines without leakage activation |
| IPPM | 12 A - peak surge current handling per path (IEC 61000-4-5, 8/20 μs), enabling robust industrial transient suppression |
| VBR (min) | 13.5 V - ensures reliable turn-on above system operating voltage to avoid false triggering |
| VC @ IPPM | 21.2–26 V - clamping voltage during full 12 A surge, limiting downstream IC stress to safe levels |
| CD @ 0 V | 115–150 pF - low capacitance preserves signal integrity on 10–50 Mbps data lines |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer and automotive interfaces |
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, MSL level 1, lead (Pb)-free e3 Sn plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of D1 / Cathode of D2 | Connects to first protected signal line (L1) in BiAs mode; active in both forward and reverse clamping paths |
| Pin 2 | Anode of D2 / Cathode of D1 | Connects to second protected signal line (L2) in BiAs mode; provides mirrored clamping behavior to Pin 1 |
| Pin 3 | Common cathode (BiAs) / NC (BiSy) | Ground reference for dual-line protection; must be connected in BiAs mode, left floating in BiSy mode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and infotainment applications requiring -55 °C to +150 °C junction operation |
| BiAs/BiSy dual-mode operation | Single device supports either two-line asymmetric (USB, HDMI) or one-line symmetric (CAN, LIN) protection without redesign |
| Low IR @ VRWM | ≤1 μA leakage at 12 V ensures minimal power loss and no interference with 12 V sensor biasing |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets IPC-CC-830B and automotive flammability safety standards |
| RoHS-compliant + green | Halogen-free, lead-free construction compliant with EU RoHS Directive 2011/65/EU and Vishay Green Standard |
Applications
| USB 2.0 Interface Protection | Industrial RS-485 Transceivers |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports against ESD events during hot-plug insertion in embedded host controllers. IC Role / Device Role / Timing Role: Two-line asymmetrical ESD clamp placed directly at connector, with pin 3 grounded and pins 1/2 tied to D+/D−. Use Value: Limits clamping voltage to ≤26 V during 12 A surges while maintaining <150 pF capacitance to preserve 480 Mbps signal integrity. | Use Scenario: Safeguarding differential A/B lines of RS-485 transceivers in factory automation PLCs exposed to cable-induced surges. IC Role / Device Role / Timing Role: Dual-path transient voltage suppressor mounted at PCB edge, grounding common node (pin 3) to chassis ground. Use Value: Withstands ±30 kV contact discharge and delivers 12 A surge capacity per line, preventing transceiver latch-up or damage. |
| Automotive LIN Bus Nodes | 12 V Sensor Signal Conditioning |
Use Scenario: Protecting LIN bus master/slave nodes in body control modules where wiring harnesses introduce ESD and load-dump transients. IC Role / Device Role / Timing Role: Configured in BiSy mode (pin 3 open) across LIN bus line and ground to provide symmetrical ±12 V clamping. Use Value: Matches LIN's 12 V nominal supply with 12.5 V VRWM and maintains <75 pF capacitance to avoid distorting 20 kbps signaling. | Use Scenario: Shielding analog outputs of pressure or temperature sensors powered from 12 V rails in harsh industrial environments. IC Role / Device Role / Timing Role: Single-line BiSy clamp between sensor output and ground, leveraging matched forward/reverse clamping for bidirectional fault tolerance. Use Value: 1 μA max leakage at 12.5 V VRWM prevents loading of high-impedance sensor outputs; 23.4 V max clamping protects downstream ADC inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT12C | Direct replacement family with identical VRWM (12 V), IPPM (12 A), and SOT-23 package; improved thermal performance and extended lifecycle beyond Jan 2025. | Drop-in compatible for new designs; requires no layout change but offers enhanced reliability for long-term production. | Select VGSOT12C for new designs targeting >2025 volume deployment or requiring extended manufacturer support. |
| SMF12A | Single-line 12 V TVS diode (SOD-123), 12.2 V VRWM, 14.4 V VC @ 1 A, 200 W PPP - lacks dual-line integration and BiSy capability. | Suitable only for single-line protection; requires two devices plus routing for dual-line use, increasing BOM count and board area. | Choose SMF12A only when dual-line integration is unnecessary and cost-per-line is prioritized over space and assembly efficiency. |
Compared with GSOT12C-HE3-18, VGSOT12C provides identical electrical performance with extended availability and improved thermal robustness, while SMF12A sacrifices integration and mode flexibility for lower unit cost in single-line implementations.
Availability
GSOT12C-HE3-18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial RS-485 transceivers, and automotive LIN bus nodes requiring stable component supply through its end-of-life date in January 2025.
Supply support for GSOT12C-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 series was developed specifically for compact, high-performance ESD protection of high-speed and 12 V–36 V data/sensor lines in space-constrained automotive and industrial applications, emphasizing AEC-Q101 compliance and dual-mode flexibility.
FAQ
What is the maximum operating temperature range for GSOT12C-HE3-18?
The GSOT12C-HE3-18 supports a junction temperature range of -55 °C to +150 °C, validated per AEC-Q101 stress testing. This allows deployment in under-hood automotive ECUs, industrial motor drives, and outdoor equipment where ambient temperatures exceed 105 °C. The SOT-23 package's MSL level 1 rating further ensures robust reflow compatibility without moisture sensitivity concerns.
How does GSOT12C-HE3-18 differ from GSOT05C-HE3-18 in circuit protection capability?
The GSOT12C-HE3-18 provides 12 V reverse stand-off voltage (VRWM) and 12 A peak pulse current (IPPM), whereas GSOT05C-HE3-18 offers 5 V VRWM and 30 A IPPM. This makes GSOT12C-HE3-18 optimal for 12 V systems like LIN or RS-485, while GSOT05C-HE3-18 targets 3.3 V/5 V interfaces such as USB or HDMI. Their clamping voltages, capacitance, and leakage currents are scaled accordingly - GSOT12C-HE3-18 delivers 21.2–26 V clamping at 12 A versus 12–16 V at 30 A for GSOT05C-HE3-18.
Can GSOT12C-HE3-18 be used in BiSy mode for CAN FD physical layer protection?
Yes - in BiSy mode (pin 3 unconnected, pins 1–2 across CAN_H and ground), GSOT12C-HE3-18 provides symmetrical clamping with 12.5 V VRWM and ≤23.4 V clamping at 12 A, meeting ISO 11898-2 requirements for fault-tolerant CAN physical layers. Its 58–75 pF capacitance at 7.5 V reverse bias avoids signal edge degradation at CAN FD's 5 Mbps rates, and AEC-Q101 qualification confirms suitability for automotive CAN networks.
What is the reverse leakage current specification for GSOT12C-HE3-18 at its rated VRWM?
At VR = 12 V and Tamb = 25 °C, the GSOT12C-HE3-18 exhibits a maximum reverse leakage current (IR) of 1 μA. This ultra-low leakage ensures negligible loading of 12 V sensor outputs or bias networks, preserving accuracy in precision analog circuits and avoiding false triggers in high-impedance monitoring paths - critical for battery-powered or energy-harvesting systems.
Is GSOT12C-HE3-18 pin-compatible with other devices in the GSOTxxC family?
Yes - all GSOTxxC devices, including GSOT12C-HE3-18, share identical SOT-23 pinout (pin 1 = anode of D1/cathode of D2, pin 2 = anode of D2/cathode of D1, pin 3 = common cathode), mechanical dimensions, and footprint. This enables direct substitution within the family for VRWM tuning (e.g., upgrading from GSOT05C-HE3-18 to GSOT12C-HE3-18) without PCB revision, provided layout accommodates the higher clamping voltage margin.
GSOT12C-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):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 312W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 115pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT12C-HE3-18 FAQ
1.How can I place an order for GSOT12C-HE3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT12C-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 GSOT12C-HE3-18 reliable?
The price and inventory of GSOT12C-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 GSOT12C-HE3-18 is usually 5 days.
3.What payment methods are accepted for GSOT12C-HE3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT12C-HE3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT12C-HE3-18?
GSOT12C-HE3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT12C-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 GSOT12C-HE3-18?
For technical support, including GSOT12C-HE3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT12C-HE3-18 requirements.
6.How does Aetrix verify that GSOT12C-HE3-18 is sourced from the original manufacturer or authorized distributors?
All GSOT12C-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 GSOT12C-HE3-18 meets industry standards.
7.What is the process for return or replacement of GSOT12C-HE3-18?
All GSOT12C-HE3-18 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT12C-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 GSOT12C-HE3-18 part is unused and in its original packaging.
Return procedure for GSOT12C-HE3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT12C-HE3-18 Tags
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