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Vishay General Semiconductor - Diodes Division SMCG8.5A-E3/9AT
- Part No.:
- SMCG8.5A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5A-E3/9AT.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,173
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Product details
Overview
SMCG8.5A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, designed for clamping fast-rising voltage transients on power and signal lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V maximum clamping voltage (VC) at 20 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMCG8.5A-E3/9AT datasheet, SMCG8.5A-E3/9AT pinout, SMCG8.5A-E3/9AT application, or SMCG8.5A-E3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), polarity marking (cathode band), and reel packaging details (13" tape, 3500 pcs/reel) essential for ESD/surge protection design-in and BOM validation.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction and low incremental surge resistance, enabling sub-nanosecond response to transients induced by inductive load switching or lightning surges. Its DO-215AB package supports automated placement and meets UL 94 V-0 flammability rating with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Rated for -55 °C to +150 °C junction temperature range and qualified to AEC-Q101, the SMCG8.5A-E3/9AT delivers stable clamping performance under repetitive surge stress when mounted on 8.0 mm × 8.0 mm copper pads per terminal. It exhibits 1000 µA maximum reverse leakage at VWM and 3.5 V forward voltage at 100 A (IF), confirming robust conduction capability during high-energy events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping initiates; sets safe margin below system rail voltage |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - defines precise breakdown threshold for reliable turn-on during overvoltage events |
| VC @ IPPM | 14.4 V at 20 A (10/1000 µs) - clamping voltage limiting downstream component stress during surge |
| PPPM | 1500 W - peak transient energy absorption capacity without failure under standardized surge waveform |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; informs heatsinking requirements on standard PCB layout |
| TJ max. | +150 °C - maximum allowable junction temperature supporting operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with cathode band marking on unidirectional variants. Molding compound meets UL 94 V-0; terminals are matte tin plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line ground or low-side return path | Completes clamping loop during transient - must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit point in forward bias; marked by visible band on body | Connected to supply rail or signal line being protected - polarity error prevents clamping function |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile DO-215AB package | Enables high-density PCB layouts and compatibility with automated SMT assembly lines without height clearance issues |
| Glass-passivated chip junction | Ensures long-term stability of VBR and leakage performance across temperature and humidity stress conditions |
| 1500 W peak pulse power rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with minimal trace inductance |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring zero-defect reliability |
| MSL Level 1 (260 °C peak) | Permits single-reflow soldering without moisture sensitivity concerns - no baking required prior to assembly |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp positive-going surges above 14.4 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to <15 V, preventing latch-up or oxide damage during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors. IC Role / Device Role / Timing Role: TVS connected across signal and return paths to absorb ESD and cable discharge events. Use Value: Clamps transients to ≤14.4 V within <1 ns, preserving ADC input integrity and avoiding false readings or calibration drift. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side DC bus protection in USB-C PD chargers exposed to hot-plug and capacitive coupling noise. IC Role / Device Role / Timing Role: Unidirectional suppressor placed after rectifier to limit overvoltage on bulk capacitor and controller IC. Use Value: Absorbs 1500 W pulses without degradation, maintaining <1% VWM drift after 1000 surges per JEDEC JESD22-A114. |
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors subjected to lightning-induced surges on RJ45 lines. IC Role / Device Role / Timing Role: Paired TVS devices (one per differential pair) referenced to chassis ground to shunt common-mode transients. Use Value: Achieves <100 ps response time and <14.4 V clamping, meeting GR-1089-CORE Level 3 telecom surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-E3/57T | Same VWM (8.5 V) and VC (14.4 V), but lower PPPM (400 W); SMA (DO-214AC) package with higher RθJA (110 °C/W) | Suitable only for lower-energy transients (IEC 61000-4-2 ±8 kV contact); not rated for AEC-Q101 | Select when cost or legacy footprint constraints outweigh automotive qualification and 1500 W surge needs. |
| SMCJ8.5A-E3/9AT | Identical VWM, VBR, VC, and PPPM; same DO-215AB package; differs only in JEDEC prefix (SMCJ vs SMCG) and minor process revision | Functionally interchangeable in all circuits; identical thermal and surge performance; both AEC-Q101 qualified | Prefer SMCG8.5A-E3/9AT for new designs due to documented TransZORB® branding and latest revision (Jan 2024). |
Compared with SMAJ8.5A-E3/57T, SMCG8.5A-E3/9AT delivers 275% higher surge power handling and automotive qualification; versus SMCJ8.5A-E3/9AT, it offers identical protection specs but reflects Vishay's current-generation TransZORB® process with enhanced consistency in VBR tolerance and leakage stability.
Availability
SMCG8.5A-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and telecom line card surge protection requiring stable component supply and full traceability.
Supply support for SMCG8.5A-E3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series is part of Vishay's TransZORB® TVS platform engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and communications infrastructure where AEC-Q101 compliance and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMCG8.5A-E3/9AT at its rated peak pulse current?
The SMCG8.5A-E3/9AT has a maximum clamping voltage (VC) of 14.4 V when subjected to a 10/1000 µs waveform at 20 A peak pulse current (IPPM). This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads per terminal and ensures downstream components experience limited overvoltage stress during surge events. The SMCG8.5A-E3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG8.5A-E3/9AT suitable for automotive applications?
Yes, SMCG8.5A-E3/9AT is AEC-Q101 qualified and specifically designed for automotive use cases including engine control units, body electronics, and ADAS modules. Its -55 °C to +150 °C operating junction temperature range, glass-passivated junction, and 1500 W peak pulse power rating meet stringent automotive surge immunity requirements such as ISO 7637-2 and ISO 16750-2. The SMCG8.5A-E3/9AT also complies with JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile.
What does the "E3/9AT" suffix indicate in SMCG8.5A-E3/9AT?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads; "9AT" specifies packaging in 13-inch diameter plastic tape and reel containing 3500 units. This format enables high-speed pick-and-place assembly and aligns with Vishay's standard ordering nomenclature for surface-mount TVS diodes. The SMCG8.5A-E3/9AT is distinct from variants like SMCG8.5A-E3/57T (7-inch reel, 850 units) and SMCG8.5AHE3/9AT (AEC-Q101 qualified version).
How does SMCG8.5A-E3/9AT differ from bidirectional TVS diodes like SMCG8.5CA?
SMCG8.5A-E3/9AT is unidirectional and features a cathode band marking; it conducts only in reverse bias above VBR and blocks forward current except during clamping. In contrast, SMCG8.5CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. The SMCG8.5A-E3/9AT offers lower leakage (<1000 µA at VWM) and higher IFSM (200 A) than its bidirectional counterpart, making it preferred for DC power rail protection where polarity is fixed and surge direction is known.
What is the thermal resistance of SMCG8.5A-E3/9AT, and how does it affect PCB layout?
The SMCG8.5A-E3/9AT 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 minimum recommended pad layout per Vishay's datasheet - reducing pad size increases RθJA and risks thermal runaway during repeated surges. For reliable operation at full 1500 W rating, designers must maintain these pad dimensions and avoid excessive copper isolation around the SMCG8.5A-E3/9AT footprint.
SMCG8.5A-E3/9AT 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 104.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG8.5A-E3/9AT FAQ
1.How can I place an order for SMCG8.5A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5A-E3/9AT 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 SMCG8.5A-E3/9AT reliable?
The price and inventory of SMCG8.5A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG8.5A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG8.5A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5A-E3/9AT?
SMCG8.5A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5A-E3/9AT 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 SMCG8.5A-E3/9AT?
For technical support, including SMCG8.5A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5A-E3/9AT requirements.
6.How does Aetrix verify that SMCG8.5A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG8.5A-E3/9AT 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 SMCG8.5A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG8.5A-E3/9AT?
All SMCG8.5A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5A-E3/9AT, 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 SMCG8.5A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG8.5A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5A-E3/9AT Tags
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