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Vishay General Semiconductor - Diodes Division SMCG8.5AHE3/9AT
- Part No.:
- SMCG8.5AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5AHE3/9AT.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,156
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Product details
Overview
SMCG8.5AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V clamping voltage (VC) at 20 A peak pulse current, and 1500 W peak pulse power rating with a 10/1000 µs waveform - ideal for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SMCG8.5AHE3/9AT datasheet, SMCG8.5AHE3/9AT pinout, SMCG8.5AHE3/9AT application, or SMCG8.5AHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.45), 1.0 µA max reverse leakage at VWM, DO-215AB thermal performance (RθJA = 75 °C/W), and compatibility with automated SMT placement on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for fast response (<1 ns) and stable surge handling. Its electrical behavior follows the IEEE C62.35 standard for transient suppressors, with defined derating above 25 °C per Fig. 2 and validated performance under 8.3 ms half-sine surge (IFSM = 200 A).
The SMCG8.5AHE3/9AT is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards - confirming suitability for high-reliability automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - tight breakdown tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 14.4 V at 20 A - clamping voltage during 10/1000 µs surge; limits protected circuit stress to safe levels |
| PPPM | 1500 W - peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 1/2a/5a |
| ID @ VWM | 1.0 µA max - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - enables operation in under-hood automotive environments without thermal derating penalties |
| RθJA | 75 °C/W - thermal resistance measured on 8.0 mm × 8.0 mm copper pads; informs board-level thermal design |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with molded UL 94 V-0 compound; dimensions 7.87 mm × 5.59 mm × 2.41 mm (L × W × H); cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return path | Provides reference node for clamping action; must be routed with low-inductance path to minimize overshoot |
| Cathode | Current exit point in forward bias; marked with band; connected to line/voltage rail being protected | Defines polarity-sensitive placement; incorrect orientation disables protection and risks short-circuit failure |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Glass passivated junction | Ensures stable VBR over time and immunity to moisture-induced parameter drift in harsh environments |
| MSL Level 1 rating | Enables single-pass reflow at 260 °C peak without popcorn cracking or delamination |
| Low incremental surge resistance | Minimizes VC rise under high di/dt conditions - critical for suppressing fast-rising ESD and load-dump spikes |
| RoHS-compliant HE3 suffix | Meets EU RoHS Directive 2011/65/EU and JESD201 Class 2 whisker resistance requirements |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and chassis ground, absorbing >1000 W surges within nanoseconds. Use Value: Limits rail voltage to ≤14.4 V during 20 A surge, preventing damage to downstream DC-DC converters and microcontrollers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS mounted at connector interface to shunt transients before reaching precision op-amps or ADC inputs. Use Value: Maintains signal fidelity with <0.1% error contribution while surviving ±15 kV contact ESD per IEC 61000-4-2. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Standoff-rated (8.5 V) TVS used in coordination with MOVs and fuses to provide staged overvoltage defense. Use Value: Clamps fast transients before they propagate to bridge rectifier and PWM controller, extending product lifetime in surge-prone regions. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: High-power (1500 W) unidirectional suppressor placed at PD input, referenced to local ground plane. Use Value: Withstands repeated 10/1000 µs surges up to 20 A without degradation, meeting Telcordia GR-1089-CORE requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-E3/57T | Same VWM (8.5 V) and PPPM (1500 W), but SMA (DO-214AC) package; RθJA = 85 °C/W vs. 75 °C/W | Lower power density; less suitable for high-temperature automotive under-hood use | Select when board space allows larger footprint and thermal budget permits higher junction rise |
| SMCJ8.5AHE3/9AT | Higher PPPM (3000 W), same DO-215AB package; VBR range 9.44–10.4 V; VC = 14.4 V at 40 A | Over-spec'd for 1500 W needs; adds cost and layout overhead without functional benefit | Choose only if future-proofing against higher surge threats or system-level test margin expansion is required |
Compared with SMAJ8.5A-E3/57T, SMCG8.5AHE3/9AT offers superior thermal performance and automotive qualification; versus SMCJ8.5AHE3/9AT, it delivers precise 1500 W matching with lower cost and optimized footprint for standard load-dump protection.
Availability
SMCG8.5AHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution modules, industrial sensor interfaces, and telecom DC feeders requiring stable component supply, AEC-Q101 compliance, and consistent 1500 W surge handling.
Supply support for SMCG8.5AHE3/9AT 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, efficiency, and application-specific validation.
The SMCG series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, low clamping voltage, and repeatable surge endurance are mandatory.
FAQ
What is the clamping voltage of SMCG8.5AHE3/9AT at its rated peak pulse current?
The SMCG8.5AHE3/9AT has a maximum clamping voltage (VC) of 14.4 V when subjected to a 10/1000 µs waveform peak pulse current (IPPM) of 20 A. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and reflects the actual voltage seen by protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMCG8.5AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG8.5AHE3/9AT suitable for automotive applications?
Yes, SMCG8.5AHE3/9AT is AEC-Q101 qualified and specifically designed for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility (260 °C peak), and guaranteed operation from -55 °C to +150 °C junction temperature - all validated per automotive stress test standards. The SMCG8.5AHE3/9AT is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces to meet ISO 7637-2 load-dump and ISO 16750-2 supply voltage variation requirements.
What does the "HE3" suffix indicate in SMCG8.5AHE3/9AT?
The "HE3" suffix in SMCG8.5AHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from industrial-grade "E3" variants. Specifically, HE3 indicates matte tin-plated leads meeting JESD 201 Class 2 whisker resistance, halogen-free molding compound, and full automotive reliability testing. This suffix confirms that the SMCG8.5AHE3/9AT is approved for use in safety-critical automotive subsystems where long-term stability and process consistency are mandated.
How does the SMCG8.5AHE3/9AT compare to bidirectional TVS diodes in the same family?
The SMCG8.5AHE3/9AT is unidirectional, meaning it conducts only in reverse bias above VBR and blocks forward current - unlike bidirectional variants (e.g., SMCG8.5CA) which clamp symmetrically in both directions. Its cathode-band marking enforces correct PCB orientation, and it exhibits lower leakage (1.0 µA vs. up to 2.0 µA for CA types). The SMCG8.5AHE3/9AT is preferred for DC power rail protection where polarity is fixed, offering tighter VBR tolerance and better thermal performance than equivalent bidirectional parts.
What is the recommended PCB pad layout for optimal thermal and electrical performance of SMCG8.5AHE3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG8.5AHE3/9AT to achieve rated PPPM and thermal resistance (RθJA = 75 °C/W). These pads must be directly connected to internal ground/power planes via multiple thermal vias. Avoid narrow traces between the SMCG8.5AHE3/9AT and protected node - keep paths short and wide to minimize inductance and ensure sub-10 ns response. The SMCG8.5AHE3/9AT's DO-215AB gull-wing leads require standard SMT stencil apertures aligned to IPC-7351B density level A.
SMCG8.5AHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG8.5AHE3/9AT FAQ
1.How can I place an order for SMCG8.5AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5AHE3/9AT 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 SMCG8.5AHE3/9AT reliable?
The price and inventory of SMCG8.5AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG8.5AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG8.5AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5AHE3/9AT?
SMCG8.5AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5AHE3/9AT 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 SMCG8.5AHE3/9AT?
For technical support, including SMCG8.5AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5AHE3/9AT requirements.
6.How does Aetrix verify that SMCG8.5AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG8.5AHE3/9AT 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 SMCG8.5AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG8.5AHE3/9AT?
All SMCG8.5AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5AHE3/9AT, 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 SMCG8.5AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG8.5AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5AHE3/9AT Tags
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