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Vishay General Semiconductor - Diodes Division SMCG8.5A-E3/57T
- Part No.:
- SMCG8.5A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5A-E3/57T.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,422
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Product details
Overview
SMCG8.5A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, with 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 (IPPM), and 1500 W peak pulse power (PPPM) rating. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power electronics.
For engineers reviewing the SMCG8.5A-E3/57T datasheet, SMCG8.5A-E3/57T pinout, SMCG8.5A-E3/57T application, or SMCG8.5A-E3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W 10/1000 µs surge capability, DO-215AB thermal performance (RθJA = 75 °C/W), and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
The SMCG8.5A-E3/57T employs a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance. Its unidirectional architecture provides forward conduction only during reverse-biased clamping events, enabling precise protection of DC-biased signal and power rails.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions while maintaining clamping voltage ≤14.4 V at 20 A - critical for safeguarding 3.3 V and 5 V logic interfaces without overstressing downstream components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins; matches 9 V nominal supply rails with margin |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - ensures reliable turn-on above system operating voltage while avoiding false triggering |
| VC @ IPPM | 14.4 V at 20 A - limits transient voltage seen by protected ICs to safe levels during 10/1000 µs surges |
| PPPM | 1500 W - sustains high-energy transients common in automotive load-dump and inductive switch-off events |
| IFSM | 200 A - handles single half-sine 8.3 ms surge without degradation; supports robust front-end protection |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 75 °C/W - defines thermal derating on standard PCB layout; requires adequate copper area for full power rating |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and AEC-Q101 qualification. Polarity marked with cathode band; anode and cathode terminals are co-planar gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Clamping output node | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR and low leakage (<1000 µA at VWM) across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or dry-pack requirements |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving clamping precision for sensitive analog circuits |
| UL 497B recognized (QVGQ2) | Meets safety standards for telecom and industrial signal-line protectors; certified for both uni- and bidirectional variants |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V power rail inputs to body control modules (BCMs) against ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role: Unidirectional TVS placed between fused battery input and DC-DC converter input stage. Use Value: Clamps 1500 W surges to ≤14.4 V, preventing latch-up or damage to 36 V-rated input regulators while meeting AEC-Q101 requirements. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role: TVS mounted directly at connector entry point, shunting induced lightning-induced surges on field wiring. Use Value: Sub-1 ns response and 14.4 V clamping ensure sensor ICs remain within absolute maximum ratings during 1 kV/500 A surge events. |
| Consumer Power Adapter Input Stage | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters after primary-side isolation. IC Role / Device Role: Unidirectional clamp on +5 V/9 V/15 V output rails to prevent fault propagation into connected devices. Use Value: 8.5 V VWM aligns with USB PD profile voltages; 1500 W PPPM absorbs energy from transformer leakage spikes without thermal runaway. |
Use Scenario: Protection of RS-485 transceiver pins in base station backhaul equipment exposed to induced surges on long cable runs. IC Role / Device Role: Discrete TVS placed between differential pair and transceiver, referenced to local ground. Use Value: Low clamping voltage (14.4 V) preserves common-mode range of ±7 V RS-485 receivers while surviving repeated 10/1000 µs transients. |
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/VBR/VC specs but in SMA (DO-214AC) package; lower PPPM (400 W), higher RθJA (110 °C/W) | Limited to lower-energy transients; unsuitable for automotive load-dump or industrial 1500 W requirements | Select SMCG8.5A-E3/57T when 1500 W surge handling and AEC-Q101 compliance are mandatory. |
| SMCJ8.5A-E3/57T | Same DO-214AB package footprint as SMCG but higher VBR (9.44–10.4 V same), identical PPPM (1500 W), but not AEC-Q101 qualified | Acceptable for industrial/commercial use where automotive qualification is not required | Choose SMCG8.5A-E3/57T over SMCJ8.5A-E3/57T when AEC-Q101 certification and enhanced thermal reliability are needed. |
Compared with SMAJ8.5A-E3/57T and SMCJ8.5A-E3/57T, the SMCG8.5A-E3/57T uniquely combines 1500 W surge capability, AEC-Q101 qualification, and DO-215AB thermal performance - making it the only option among the three validated for under-hood automotive deployment with minimal PCB area.
Availability
SMCG8.5A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line interface applications requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SMCG8.5A-E3/57T 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 performance.
The SMCG series was developed to deliver high-power, AEC-Q101-qualified transient protection in compact surface-mount packages for automotive and harsh-environment industrial systems demanding consistent clamping behavior and long-term stability.
FAQ
What is the clamping voltage of the SMCG8.5A-E3/57T at its rated peak pulse current?
The SMCG8.5A-E3/57T has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per the recommended layout, ensuring repeatable thermal and electrical performance in production designs.
Is the SMCG8.5A-E3/57T suitable for automotive applications?
Yes, the SMCG8.5A-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and operation up to +150 °C junction temperature - all verified per the AEC-Q101 stress test plan. It is commonly deployed in BCMs, ADAS power supplies, and infotainment system inputs.
What does the "E3/57T" suffix indicate in SMCG8.5A-E3/57T?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2). The "57T" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units - optimized for automated SMT placement.
How does the SMCG8.5A-E3/57T differ from bidirectional TVS diodes like SMCG8.5CA?
The SMCG8.5A-E3/57T is unidirectional and features a cathode band marking; it conducts only in reverse bias, making it ideal for DC power rail protection. In contrast, SMCG8.5CA is bidirectional with no polarity marking and symmetric clamping in both directions - suited for AC signal lines or floating buses where polarity is undefined.
What is the thermal resistance of the SMCG8.5A-E3/57T, and how does it affect layout design?
The SMCG8.5A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" copper pads. To maintain full 1500 W pulse rating, PCB layout must replicate this pad size and thermal mass; reducing copper area increases junction temperature and requires derating per Figure 2 in the datasheet.
SMCG8.5A-E3/57T 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-E3/57T FAQ
1.How can I place an order for SMCG8.5A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5A-E3/57T 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-E3/57T reliable?
The price and inventory of SMCG8.5A-E3/57T 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-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG8.5A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5A-E3/57T?
SMCG8.5A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5A-E3/57T 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-E3/57T?
For technical support, including SMCG8.5A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5A-E3/57T requirements.
6.How does Aetrix verify that SMCG8.5A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG8.5A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG8.5A-E3/57T?
All SMCG8.5A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SMCG8.5A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5A-E3/57T Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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