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Vishay General Semiconductor - Diodes Division SMCG85AHE3/9AT
- Part No.:
- SMCG85AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG85AHE3/9AT.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,529
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Product details
Overview
SMCG85AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection on power and signal lines. It features a 85 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 10.9 A maximum clamping current (IPPM), and clamps to ≤137 V at rated surge. It is AEC-Q101 qualified and used in automotive power rail and sensor interface protection.
For engineers reviewing the SMCG85AHE3/9AT datasheet, SMCG85AHE3/9AT pinout, SMCG85AHE3/9AT application, or SMCG85AHE3/9AT equivalent, this page delivers verified electrical parameters, mechanical package details, real-world use cases, and validated alternative parts - all aligned with Vishay's 88457 specification revision (09-Jan-2024).
Technical Context
The SMCG85AHE3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to ESD and lightning-induced transients. Its low incremental surge resistance and tight VBR tolerance (±5%) ensure consistent clamping behavior under repetitive surge stress.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The device meets J-STD-020 MSL Level 1 and is rated for 200 A IFSM (8.3 ms half-sine), confirming robustness in automotive load-dump scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before significant leakage; sets safe working margin below breakdown. |
| VBR (min/max) | 94.4 V / 104 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤137 V at 10.9 A - Clamping voltage under full 1500 W surge; defines worst-case voltage seen by protected IC or MOSFET. |
| PPPM | 1500 W (10/1000 µs waveform) - Peak transient energy handling capacity; validates suitability for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-critical systems. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables deployment in under-hood automotive environments. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, UL 94 V-0 molding compound, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line (e.g., 12 V rail) | Accepts surge current during reverse-transient clamping; must be routed with low-inductance path to ground. |
| Cathode | Current exit terminal in forward bias; marked with band; tied to system ground or return path | Serves as reference node for clamping action; requires solid thermal pad connection to dissipate 1500 W surge energy. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics per stress test requirements - eliminates need for additional qualification effort. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 (260 °C peak) | Enables standard SMT reflow without moisture-related popcorn failure - supports high-yield automated assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD), improving protection margin for downstream CMOS ICs. |
| 1500 W peak pulse power | Handles ISO 7637-2 Load Dump (Pulse 5) and IEC 61000-4-5 Combination Wave surges without degradation. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply rails in engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 1500 W surges to ≤137 V, preventing overvoltage damage to LDOs and microcontrollers while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt induced surges before reaching ADC front-end. Use Value: Sub-1 ns response and ≤1.0 µA leakage preserve signal integrity and minimize offset error in precision 4–20 mA loops. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Front-end protection for PoE-powered network switches exposed to lightning-induced surges on Ethernet ports. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (e.g., SMCG85CA) used; SMCG85AHE3/9AT serves as unidirectional alternative where DC bias exists. Use Value: 137 V clamping voltage limits stress on Ethernet PHY transceivers during 10/1000 µs surges per IEC 61000-4-5. |
Use Scenario: Input-stage protection in USB-C PD adapters subjected to AC line transients and hot-plug ESD. IC Role / Device Role / Timing Role: TVS placed across primary-side bulk capacitor to clamp MOV-induced let-through spikes. Use Value: 85 V VWM aligns with 100 V-rated electrolytic capacitors; 1500 W rating absorbs multiple surge events without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85A-E3/57T | Same VWM (85 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 95 °C/W | Lower surge capacity; suitable only for IEC 61000-4-2 ESD, not load dump or lightning surges | Select when cost and board space are prioritized over automotive-grade surge robustness. |
| SMCJ85AHE3/9AT | Same VWM (85 V), identical PPPM (1500 W), but larger SMC (DO-214AB) package with higher thermal mass | Slower thermal response due to larger junction-to-lead resistance; less suited for high-frequency transient repetition | Choose when legacy SMC footprint compatibility is required and DO-215AB rework is impractical. |
Compared with SMAJ85A-E3/57T and SMCJ85AHE3/9AT, the SMCG85AHE3/9AT delivers equivalent 1500 W surge capability in a smaller DO-215AB footprint with superior thermal resistance (RθJL = 15 °C/W), making it optimal for space-constrained automotive modules requiring rapid thermal recovery.
Availability
SMCG85AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMCG85AHE3/9AT 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in automotive power distribution and sensor interfaces - balancing compact size, high surge rating, and process-controlled parametric consistency.
FAQ
What is the clamping voltage of SMCG85AHE3/9AT at its rated peak pulse current?
The SMCG85AHE3/9AT clamps to a maximum of 137 V at its rated peak pulse current (IPPM) of 10.9 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88457, ensuring predictable overvoltage limiting for downstream components such as MOSFETs and microcontrollers in the SMCG85AHE3/9AT protection circuit.
Is SMCG85AHE3/9AT suitable for automotive applications?
Yes, SMCG85AHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with operating temperatures from –55 °C to +150 °C. Its 1500 W surge rating, 200 A IFSM, and MSL Level 1 reflow compatibility make it appropriate for protecting power rails and sensor interfaces in ECUs, ADAS modules, and body control units using the SMCG85AHE3/9AT.
What does the "HE3" suffix indicate in SMCG85AHE3/9AT?
The "HE3" suffix in SMCG85AHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification (per Vishay's mechanical data table). It distinguishes the part from industrial-grade "E3" variants and halogen-free "HM3" versions - confirming that the SMCG85AHE3/9AT meets both environmental compliance and automotive reliability standards out of the box.
How does the SMCG85AHE3/9AT package differ from SMA or SMC packages?
The SMCG85AHE3/9AT uses the DO-215AB (SMCG) package - a gull-wing surface-mount outline with 0.220–0.245 inch body width and 0.024 inch lead pitch - offering lower profile and better thermal resistance (RθJL = 15 °C/W) than SMA (DO-214AC) and tighter footprint than SMC (DO-214AB). This makes the SMCG85AHE3/9AT ideal for dense automotive PCB layouts where thermal performance and space are critical.
Can SMCG85AHE3/9AT be used in bidirectional configurations?
No - SMCG85AHE3/9AT is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., SMCG85CA). Using SMCG85AHE3/9AT in reverse-biased AC applications would result in forward conduction and potential failure; always verify polarity alignment in the SMCG85AHE3/9AT layout.
SMCG85AHE3/9AT 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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 10.9A
- 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)
SMCG85AHE3/9AT FAQ
1.How can I place an order for SMCG85AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG85AHE3/9AT 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 SMCG85AHE3/9AT reliable?
The price and inventory of SMCG85AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG85AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG85AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG85AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG85AHE3/9AT?
SMCG85AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG85AHE3/9AT 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 SMCG85AHE3/9AT?
For technical support, including SMCG85AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG85AHE3/9AT requirements.
6.How does Aetrix verify that SMCG85AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG85AHE3/9AT 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 SMCG85AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG85AHE3/9AT?
All SMCG85AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG85AHE3/9AT, 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 SMCG85AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG85AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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