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Vishay General Semiconductor - Diodes Division SMCG36HE3/9AT
- Part No.:
- SMCG36HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG36HE3/9AT.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,671
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Product details
Overview
SMCG36HE3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) in DO-215AB (SMCG) package, designed for clamping voltage transients on signal/power lines. It features 36 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), 58.1 V maximum clamping voltage (VC) at IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG36HE3/9AT datasheet, SMCG36HE3/9AT pinout, SMCG36HE3/9AT application, or SMCG36HE3/9AT equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O modules, and telecom line drivers where bidirectional clamping, low leakage (<1 μA at VWM), and MSL Level 1 reflow compatibility are required.
Technical Context
The SMCG36HE3/9AT implements a bi-directional avalanche diode structure with glass-passivated junction, enabling symmetrical clamping in both polarities without polarity marking. Its 1500 W PPPM rating is specified under 10/1000 μs waveform with derating above 25 °C ambient per Fig. 2, and thermal resistance RθJA is 75 °C/W on 8.0 mm × 8.0 mm copper pads.
It operates across -55 °C to +150 °C junction temperature range and meets J-STD-020 MSL Level 1 with 260 °C peak reflow profile. The device exhibits 40.0–44.2 V breakdown voltage (VBR) at 1 mA test current and maintains <1 μA reverse leakage at 36 V stand-off, confirming tight VWM tolerance and low standby power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 33–36 V nominal bus systems. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains 10/1000 μs surge events without failure; enables protection against IEC 61000-4-5 Level 4 (4 kV) surges when properly laid out. |
| VC (Clamping Voltage @ IPPM) | 58.1 V - Maximum voltage seen by protected circuit during rated surge; ensures downstream ICs with 60 V abs max rating remain within safe margin. |
| VBR (Breakdown Voltage) | 40.0–44.2 V @ 1 mA - Confirmed avalanche onset range; guarantees reliable triggering before VC exceeds system limits. |
| ID (Reverse Leakage @ VWM) | <1 μA - Negligible standby current draw; critical for battery-powered sensor nodes and low-power microcontroller I/O protection. |
| TJ max. | +150 °C - Supports under-hood automotive environments and high-temperature industrial enclosures without derating. |
| MSL Rating | Level 1 (260 °C peak) - Compatible with standard lead-free reflow profiles; no floor life limitation or baking required. |
Pinout & Package
DO-215AB (SMCG) surface-mount package: gull-wing leads, matte tin-plated, RoHS-compliant, AEC-Q101 qualified. Bi-directional construction means no cathode band marking; terminals are symmetrical and non-polarized.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; connects between protected line and ground (or rail-to-rail); no orientation dependency in layout. |
| Case (exposed pad) | Thermal and mechanical anchor | Not electrically connected; provides mechanical stability and aids heat dissipation via PCB copper area (8.0 mm × 8.0 mm recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics requiring zero-failure field reliability. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 pulses), improving protection fidelity for sensitive analog front-ends. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure-critical for 15+ year automotive service life. |
| MSL Level 1 compliance | Eliminates moisture sensitivity handling requirements, reducing manufacturing cost and risk of popcorning during reflow. |
Applications
| Automotive Sensor Interface | Industrial Analog I/O Module |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and MEMS pressure sensor outputs in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±100 V transients within 1 ns response time. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V transceivers and ADC inputs while maintaining sub-μA leakage for accurate low-level signal measurement. |
Use Scenario: Shielding 4–20 mA current loop transmitter outputs and thermocouple amplifier inputs in factory automation PLCs. IC Role / Device Role / Timing Role: Line-to-ground transient suppressor on analog output pins, absorbing 1 kV/500 A surges induced by relay switching or motor drives. Use Value: Maintains signal integrity below 0.1% gain error by limiting clamped voltage to 58.1 V, well below 60 V absolute maximum ratings of precision op-amps and DACs. |
| Telecom Line Driver Protection | Consumer USB/DisplayPort ESD Guard |
Use Scenario: Safeguarding Ethernet PHY magnetics interface and xDSL line drivers against lightning-induced surges and AC power cross-talk. IC Role / Device Role / Timing Role: Primary surge suppression stage before secondary TVS or GDT, handling bulk energy (1500 W) before downstream devices engage. Use Value: Reduces need for multi-stage protection by sustaining 10/1000 μs surges up to 1500 W, lowering BOM count and board space vs. stacked TVS solutions. |
Use Scenario: Front-end ESD protection for USB 2.0 data lines and DisplayPort AUX channels in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bi-directional clamp placed directly at connector to shunt HBM ±15 kV discharges. Use Value: Preserves signal rise/fall times (<100 ps degradation) due to minimal junction capacitance, avoiding eye diagram closure in 480 Mbps USB signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | Uni-directional; 36 V VWM, 400 W PPPM, SMA package (DO-214AC), higher RθJA (100 °C/W) | Requires polarity-aware layout; lower surge rating suits consumer-grade I/O, not automotive load dump. | Select when cost-sensitive, uni-directional rails (e.g., 5 V supply lines) and lower surge immunity suffices. |
| TPSMD36CA | Bi-directional; 36 V VWM, 1500 W PPPM, same DO-215AB footprint, but not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial use only; identical electrical specs otherwise. | Choose for non-automotive designs needing identical clamping performance without AEC-Q101 overhead or cost premium. |
Compared with SMAJ36A-E3/57T and TPSMD36CA, the SMCG36HE3/9AT uniquely combines AEC-Q101 qualification, bi-directionality, and 1500 W surge capability in the compact DO-215AB package-making it the only option qualified for under-hood automotive transient suppression where reliability and polarity-agnostic layout are mandatory.
Availability
SMCG36HE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial analog I/O hardening, and telecom line driver surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SMCG36HE3/9AT 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMCG series targets high-energy transient suppression in harsh environments, engineered specifically for AEC-Q101 compliance and robustness against repetitive surges in automotive and industrial power/signal interfaces.
FAQ
What is the clamping voltage of SMCG36HE3/9AT at its rated peak pulse current?
The SMCG36HE3/9AT has a maximum clamping voltage (VC) of 58.1 V at its rated peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value ensures protected circuits-such as 3.3 V or 5 V microcontrollers and transceivers-remain within their absolute maximum voltage ratings during surge events. The clamping performance is guaranteed across the full operating temperature range (-55 °C to +150 °C) and is validated per ANSI/IEEE C62.35 standards.
Is SMCG36HE3/9AT suitable for automotive applications?
Yes, SMCG36HE3/9AT is AEC-Q101 qualified and explicitly designed for automotive use. Its qualification covers temperature cycling, humidity testing, mechanical shock, and surge endurance-making it appropriate for engine control units, ADAS sensors, infotainment interfaces, and body electronics. The HE3 suffix denotes AEC-Q101 compliance, and the bi-directional architecture supports noise-prone differential buses like LIN and CAN without polarity constraints.
Does SMCG36HE3/9AT have polarity markings on the package?
No, SMCG36HE3/9AT does not have polarity markings because it is a bi-directional TVS diode. The DO-215AB package lacks a cathode band or other orientation indicators, reflecting its symmetrical internal structure. Both terminals perform identically in either direction, simplifying PCB layout and eliminating orientation errors during automated placement-especially valuable in high-volume automotive manufacturing.
What is the thermal resistance of SMCG36HE3/9AT, and how does it affect layout?
The SMCG36HE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes optimal PCB copper area; reducing pad size increases thermal resistance and reduces safe power dissipation. For sustained surge duty cycles or high ambient temperatures, designers must verify junction temperature using RθJA and actual power dissipation to stay below the +150 °C maximum rating.
How does the SMCG36HE3/9AT compare to uni-directional TVS diodes like SMAJ36A?
The SMCG36HE3/9AT differs fundamentally from uni-directional parts like SMAJ36A by offering symmetrical clamping in both voltage polarities-critical for AC-coupled or floating signal paths. While SMAJ36A provides only 400 W PPPM and uses the larger SMA package, SMCG36HE3/9AT delivers 1500 W in the smaller DO-215AB outline and includes AEC-Q101 qualification. Its bi-directional behavior eliminates the risk of incorrect orientation during assembly and supports applications such as RS-485, CAN, and sensor bridges where polarity reversal may occur.
SMCG36HE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG36HE3/9AT FAQ
1.How can I place an order for SMCG36HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG36HE3/9AT 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 SMCG36HE3/9AT reliable?
The price and inventory of SMCG36HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG36HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG36HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG36HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG36HE3/9AT?
SMCG36HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG36HE3/9AT 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 SMCG36HE3/9AT?
For technical support, including SMCG36HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG36HE3/9AT requirements.
6.How does Aetrix verify that SMCG36HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG36HE3/9AT 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 SMCG36HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG36HE3/9AT?
All SMCG36HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG36HE3/9AT, 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 SMCG36HE3/9AT part is unused and in its original packaging.
Return procedure for SMCG36HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG36HE3/9AT Tags
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