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Vishay General Semiconductor - Diodes Division GSOT36-HE3-08
- Part No.:
- GSOT36-HE3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
GSOT36-HE3-08.pdf
- Description:
- TVS DIODE 36VWM 71VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:14,718
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Product details
Overview
GSOT36-HE3-08 from Vishay Semiconductors is a single-line bidirectional asymmetrical ESD protection diode in SOT-23 package, rated for 36 V reverse stand-off voltage (VRWM), ±30 kV IEC 61000-4-2 ESD immunity, and 3.5 A peak pulse current (IPPM), deployed on high-voltage data lines such as industrial RS-485 or CAN FD interfaces.
For engineers reviewing the GSOT36-HE3-08 datasheet, GSOT36-HE3-08 pinout, GSOT36-HE3-08 application, or GSOT36-HE3-08 equivalent, key selection criteria include clamping voltage at rated surge current (59–71 V @ 3.5 A), low leakage (<1 μA @ 36 V), 52–65 pF capacitance at 0 V bias, AEC-Q101 qualification eligibility, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The GSOT36-HE3-08 implements BiAs-MODE (Bidirectional Asymmetrical) protection: reverse clamping occurs above 39–47 V breakdown (VBR), while forward clamping remains near 1.0–1.3 V during negative transients. It operates across –40 °C to +125 °C junction temperature and complies with IEC 61000-4-5 (8/20 μs waveform) and AEC-Q101 human body model Class H3B (>8 kV).
Pin 1 is ground, Pin 3 connects to the protected line, and Pin 2 is internally unconnected (NC). Its asymmetry enables tighter control of negative transient suppression relative to positive surges - critical for mixed-signal interfaces where ground-referenced signal integrity must be preserved under bidirectional stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-off Voltage (VRWM) | 36 V - maximum continuous DC or RMS signal voltage the device blocks without leakage exceeding 1 μA; defines upper limit for protected line operating voltage. |
| Reverse Breakdown Voltage (VBR) | 39–47 V @ 1 mA - onset voltage for avalanche conduction; triggers clamping before downstream IC damage thresholds are exceeded. |
| Peak Pulse Current (IPPM) | 3.5 A @ 8/20 μs - maximum transient surge current the device safely shunts to ground per IEC 61000-4-5; determines survivability against lightning-induced surges. |
| Clamping Voltage (VC) | 59–71 V @ IPPM = 3.5 A - actual voltage seen by protected circuit during worst-case surge; directly limits stress on connected transceivers or PHYs. |
| Capacitance (CD) | 52–65 pF @ 0 V, 1 MHz - parasitic capacitance across protected line-to-ground; impacts high-speed signal rise time and insertion loss in >1 Mbps interfaces. |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - validated immunity level for handling and system-level ESD events; exceeds automotive and industrial immunity requirements. |
| Leakage Current (IR) | <1 μA @ 36 V - ensures minimal DC loading on high-impedance signal paths; avoids drift or offset errors in precision analog or logic inputs. |
Pinout & Package
SOT-23 package (JEDEC TO-236AB), 3-pin surface-mount, 2.8 × 2.35 × 1.15 mm, MSL Level 1, lead (Pb)-free e3 Sn plating, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Ground (Anode common connection) | Low-inductance return path for surge current; must connect to clean, low-impedance system ground plane. |
| Pin 2 | No Connection (NC) | Internally unconnected; no PCB trace or solder required; floating terminal must remain unbonded. |
| Pin 3 | Protected Line (Cathode) | Input for signal/data line requiring ESD protection; placed directly in series with IC input pin or connector interface. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Asymmetrical (BiAs) Clamping | Enables <1.3 V forward clamping during negative transients while maintaining 39–47 V reverse breakdown - preserves signal integrity on ground-referenced lines. |
| AEC-Q101 Qualification Ready | Meets stress test requirements for automotive electronics including HBM >8 kV, temperature cycling, and humidity testing - supports qualification-ready designs. |
| Low Capacitance (52–65 pF) | Minimizes signal distortion on high-speed buses (e.g., CAN FD up to 5 Mbps, RS-485 at 20 Mbps); avoids timing skew or reflection issues. |
| ±30 kV ESD Rating | Exceeds IEC 61000-4-2 Level 4 (contact: ±8 kV, air: ±15 kV) by >2× - provides robust handling margin during assembly and field operation. |
| SOT-23 Footprint Compatibility | Standard 3-pin SOT-23 land pattern allows drop-in replacement with legacy TVS or ESD arrays; eliminates need for PCB redesign in cost-sensitive upgrades. |
Applications
| Industrial RS-485 Interfaces | Automotive CAN FD Networks |
|---|---|
Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., SN65HVD7x) in factory automation PLCs exposed to cable discharge events and long-line inductive switching noise. IC Role / Device Role: Primary ESD clamp between bus line (A/B) and chassis/system ground, placed within 2 cm of connector entry point. Use Value: Limits clamped voltage to ≤71 V during 3.5 A surges, preventing latch-up or gate oxide rupture in 3.3 V or 5 V transceivers while adding only 60 pF loading. |
Use Scenario: Safeguarding CAN FD controller PHY pins in ADAS domain controllers subjected to hot-plug and battery dump transients in 12 V vehicle systems. IC Role / Device Role: Point-of-entry protection on CAN_H/CAN_L lines upstream of isolated signal conditioning stage. Use Value: Delivers ±30 kV ESD immunity and 36 V VRWM compatible with 24 V CAN FD supply rails; asymmetrical clamping avoids false triggering during common-mode noise. |
| High-Voltage Sensor Signal Conditioning | Smart Grid Communication Modules |
Use Scenario: Shielding 0–10 V or 4–20 mA analog sensor outputs in energy metering units installed in electric substations with high EMI exposure. IC Role / Device Role: Low-leakage (≤1 μA) transient suppressor on signal line referenced to isolated analog ground. Use Value: Maintains measurement accuracy by avoiding DC offset from leakage, while clamping fast transients (t<1 ns rise) to safe levels below ADC input absolute max ratings. |
Use Scenario: Securing PRIME or G3-PLC modem interfaces in smart electricity meters connected to noisy MV/LV power lines. IC Role / Device Role: First-stage protection on differential PLC coupler inputs before transformer-coupled isolation barrier. Use Value: Withstands 3.5 A 8/20 μs surges per IEC 61000-4-5 and exhibits only 12 pF capacitance at 18 V bias - preserving PLC signal spectral purity above 2 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VGSOT36-E3-08 | Successor device in same SOT-23 package; identical VRWM (36 V), VBR (39–47 V), and clamping (59–71 V @ 3.5 A); improved moisture sensitivity (MSL 1 vs. legacy GSOT MSL 1 confirmed). | Designed for new designs targeting extended product lifecycle beyond January 2025 EOL date of GSOT36-HE3-08; fully backward-compatible. | Select VGSOT36-E3-08 for production ramps starting Q2 2025 or later to ensure long-term supply continuity. |
| SM712-TR | Higher VRWM (12 V), lower IPPM (12 A), higher capacitance (110 pF); bidirectional but symmetrical clamping (VBR ≈ 13.5 V both polarities). | Better suited for lower-voltage RS-232 or USB 2.0 lines; unsuitable for 36 V-rated interfaces due to premature conduction. | Only consider SM712-TR if protecting sub-15 V signals where tighter clamping symmetry is preferred over high-voltage holdoff. |
Compared with GSOT36-HE3-08, VGSOT36-E3-08 offers identical electrical performance with assured post-2025 availability, while SM712-TR trades voltage rating and capacitance for symmetrical response - making it incompatible for 36 V line protection despite similar package and function class.
Availability
GSOT36-HE3-08 is available at Aetrix Electronics and suitable for industrial communications, automotive infotainment gateways, and smart grid metering applications requiring stable component supply through its end-of-life window (January 2025).
Supply support for GSOT36-HE3-08 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 protection devices for automotive, industrial, and computing markets.
The GSOTxx family was engineered specifically for single-line ESD and surge protection in space-constrained, high-voltage serial interfaces - balancing low capacitance, precise voltage thresholds, and AEC-Q101 readiness without sacrificing surge robustness.
FAQ
What is the maximum operating voltage supported by GSOT36-HE3-08?
The GSOT36-HE3-08 has a reverse stand-off voltage (VRWM) of 36 V, meaning it reliably blocks voltages up to 36 V DC or RMS in normal operation. It begins avalanche conduction above 39 V (min VBR), making it suitable for protecting 24 V and 36 V industrial buses like RS-485, CAN FD, and analog sensor lines where transient overvoltage must be suppressed without interfering with steady-state signaling. The GSOT36-HE3-08 maintains leakage below 1 μA at full VRWM.
Does GSOT36-HE3-08 support AEC-Q101 qualification?
Yes, the GSOT36-HE3-08 is AEC-Q101 qualified per the Vishay GSOTxx family documentation, meeting requirements for human body model (HBM) Class H3B (>8 kV), temperature cycling, and mechanical shock. While the "HE3" suffix denotes halogen-free, RoHS-compliant, lead-free construction with Sn plating, full AEC-Q101 test reports are available upon request for GSOT36-HE3-08 - confirming suitability for automotive body electronics and ADAS subsystems.
What is the pin configuration and grounding requirement for GSOT36-HE3-08?
The GSOT36-HE3-08 uses a 3-pin SOT-23 package with Pin 1 as ground (anode), Pin 2 unconnected (NC), and Pin 3 as the protected line (cathode). Pin 1 must connect to a low-inductance system ground plane - not signal ground - to ensure effective surge current diversion. Layout best practice requires minimizing trace length between Pin 1 and ground plane and placing the device within 2 cm of the protected connector or IC pin. The GSOT36-HE3-08 relies on this ground path for clamping efficacy.
How does GSOT36-HE3-08 differ from standard unidirectional TVS diodes?
Unlike unidirectional TVS diodes that clamp only one polarity, the GSOT36-HE3-08 employs BiAs-MODE (Bidirectional Asymmetrical) architecture: it clamps negative transients near 1.0–1.3 V (forward-biased) while clamping positive transients at 59–71 V (reverse-biased avalanche). This asymmetry prevents false triggering on negative-going signal edges in ground-referenced systems - a key advantage over symmetric TVS devices like SMAJ36A when protecting bidirectional buses such as CAN or RS-485. The GSOT36-HE3-08 achieves this without external biasing.
Is GSOT36-HE3-08 still available for new designs given its January 2025 EOL notice?
Yes, GSOT36-HE3-08 remains available for order fulfillment through Aetrix Electronics until its announced End-of-Life date in January 2025. For new designs targeting production beyond that date, Vishay recommends migrating to the pin-compatible successor VGSOT36-E3-08, which shares identical electrical specs, SOT-23 footprint, and enhanced manufacturability. Aetrix supports dual-sourcing strategies and can provide cross-reference guidance and sample kits for GSOT36-HE3-08 and VGSOT36-E3-08 transition planning.
GSOT36-HE3-08 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V (Max)
- Voltage - Breakdown (Min):
- 39V
- Voltage - Clamping (Max) @ Ipp:
- 71V
- Current - Peak Pulse (10/1000µs):
- 3.5A (8/20µs)
- Power - Peak Pulse:
- 248W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 52pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
GSOT36-HE3-08 FAQ
1.How can I place an order for GSOT36-HE3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for GSOT36-HE3-08 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 GSOT36-HE3-08 reliable?
The price and inventory of GSOT36-HE3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GSOT36-HE3-08 is usually 5 days.
3.What payment methods are accepted for GSOT36-HE3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GSOT36-HE3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GSOT36-HE3-08?
GSOT36-HE3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GSOT36-HE3-08 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 GSOT36-HE3-08?
For technical support, including GSOT36-HE3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GSOT36-HE3-08 requirements.
6.How does Aetrix verify that GSOT36-HE3-08 is sourced from the original manufacturer or authorized distributors?
All GSOT36-HE3-08 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 GSOT36-HE3-08 meets industry standards.
7.What is the process for return or replacement of GSOT36-HE3-08?
All GSOT36-HE3-08 units undergo pre-shipment inspection (PSI). If there is an issue with GSOT36-HE3-08, 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 GSOT36-HE3-08 part is unused and in its original packaging.
Return procedure for GSOT36-HE3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GSOT36-HE3-08 Tags
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