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Vishay General Semiconductor - Diodes Division SMCG8.5CA-E3/9AT
- Part No.:
- SMCG8.5CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5CA-E3/9AT.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,537
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Product details
Overview
SMCG8.5CA-E3/9AT from Vishay General Semiconductor is a bidirectional 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, 1500 W peak pulse power (PPPM), 14.4 V clamping voltage (VC) at 104.2 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG8.5CA-E3/9AT datasheet, SMCG8.5CA-E3/9AT pinout, SMCG8.5CA-E3/9AT application, or SMCG8.5CA-E3/9AT equivalent, this device is selected for high-energy surge suppression in bidirectional signal lines, automotive sensor interfaces, and industrial I/O protection where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical.
Technical Context
The SMCG8.5CA-E3/9AT operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while its low incremental surge resistance enables effective energy diversion during 10/1000 μs surges.
Thermally, it delivers 6.5 W power dissipation at TA = 50 °C with RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets UL 497B recognition (QVGQ2) and is rated for 200 A IFSM only in unidirectional variants - not applicable here due to bidirectional construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse stand-off voltage before clamping begins |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - guaranteed avalanche onset range under standardized test conditions |
| VC @ IPPM | 14.4 V at 104.2 A - clamped voltage during 10/1000 μs surge, defining worst-case stress on protected circuit |
| PPPM | 1500 W - peak transient power handling capability per 10/1000 μs waveform |
| ID @ VWM | <1 μA - ultra-low reverse leakage ensuring minimal standby current in signal paths |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive electronic systems per stress test requirements |
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 MSL Level 1 rating (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | One terminal of symmetrical PN junction; no polarity marking required |
| Cathode | Transient return path (bidirectional) | Second terminal of symmetrical PN junction; electrically identical to Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W PPPM rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out |
| 14.4 V clamping at 104.2 A | Limits downstream IC stress to safe levels during high-current transients |
| AEC-Q101 qualification | Validates reliability for automotive body control modules, ADAS sensors, and infotainment interfaces |
| MSL Level 1, 260 °C peak | Permits standard SMT reflow without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector or IC pin to clamp ±20 V transients before they reach PHY or ADC front-end. Use Value: Prevents latch-up or permanent damage to transceivers like TCAN1042 or MCP2562 under ISO 7637-2 Pulse 1/2/5a conditions. | Use Scenario: Shielding differential CAN H/L lines in factory automation controllers against ESD (IEC 61000-4-2) and surge (IEC 61000-4-5). IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor mounted across bus pair to limit common-mode overvoltage without distorting signal integrity. Use Value: Maintains <15 pF junction capacitance (typ.) to avoid CAN bit-rate degradation up to 1 Mbps while surviving 4 kV contact ESD. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in set-top boxes and smart displays against human-body-model ESD events. IC Role / Device Role / Timing Role: Symmetric TVS placed differentially between data lines and ground to absorb ±8 kV air/±15 kV contact discharge. Use Value: Clamps transients below 15 V within <1 ns, preserving USB eye diagram and preventing PHY reset or enumeration failure. | Use Scenario: Front-end protection of ADSL/VDSL line drivers and receivers exposed to lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: High-power bidirectional suppressor installed between transformer secondary and codec IC to shunt multi-kV transients. Use Value: Handles 1500 W peak pulses without degradation, meeting GR-1089-CORE Level 3 surge requirements for central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA | Same VWM (8.5 V) and bidirectional configuration, but lower PPPM (400 W) and higher VC (14.4 V @ 26.7 A) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats like ESD or EFT | Select SMAJ8.5CA only when board space is constrained and surge energy is ≤400 W |
| SMCJ8.5CA | Same DO-214AB package footprint, 1500 W PPPM, but larger body and higher thermal mass; VC = 14.4 V @ 104.2 A matches exactly | Compatible with same PCB layout but requires larger pad area; better long-duration surge handling | Choose SMCJ8.5CA if thermal derating margin or sustained surge exposure is critical |
Compared with SMAJ8.5CA and SMCJ8.5CA, the SMCG8.5CA-E3/9AT delivers identical clamping performance and surge rating in a smaller DO-215AB outline, enabling higher component density while maintaining AEC-Q101 compliance and MSL Level 1 process compatibility.
Availability
SMCG8.5CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and consumer USB port protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCG8.5CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive qualification.
The SMCG series is engineered specifically for high-power, bidirectional transient suppression in space-constrained automotive and industrial applications where low-profile mounting and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SMCG8.5CA-E3/9AT?
The "CA" suffix denotes a bidirectional configuration - meaning the SMCG8.5CA-E3/9AT functions identically in both polarities, with no cathode band marking and symmetric breakdown behavior. This distinguishes it from unidirectional variants (e.g., SMCG8.5A), which have a marked cathode and conduct only in reverse bias. The SMCG8.5CA-E3/9AT is intended for AC or floating signal line protection where polarity reversal may occur.
Is SMCG8.5CA-E3/9AT suitable for IEC 61000-4-5 surge testing?
Yes, the SMCG8.5CA-E3/9AT is rated for 1500 W peak pulse power with a 10/1000 μs waveform, making it suitable for IEC 61000-4-5 Level 4 (4 kV line-to-ground, 2 kV line-to-line) when used with appropriate PCB layout (e.g., short traces, 8 mm² copper pads per terminal). Its 14.4 V clamping voltage at 104.2 A ensures protected circuits remain within safe operating limits during such events - a key requirement verified in SMCG8.5CA-E3/9AT design-in for automotive and industrial surge immunity.
Does SMCG8.5CA-E3/9AT have AEC-Q101 qualification?
Yes, the SMCG8.5CA-E3/9AT carries AEC-Q101 qualification, as confirmed in the Vishay document 88457 (Revision: 09-Jan-2024), section "MECHANICAL DATA". This certification validates its reliability for automotive electronic systems including engine control units, body electronics, and ADAS sensor modules. The "HE3" and "HM3" base part number variants explicitly denote AEC-Q101 qualification, and the SMCG8.5CA-E3/9AT shares the same die and qualification pedigree as those variants.
What is the thermal resistance of SMCG8.5CA-E3/9AT?
The SMCG8.5CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on the minimum recommended pad layout (0.31″ × 0.31″ copper pads). These values enable reliable operation at 6.5 W power dissipation up to TA = 50 °C and support continuous use in ambient temperatures up to +125 °C when board-level thermal management is applied - critical for under-hood deployment of SMCG8.5CA-E3/9AT in automotive applications.
How does the SMCG8.5CA-E3/9AT differ from SMAJ8.5CA in practical design?
The SMCG8.5CA-E3/9AT offers the same 8.5 V stand-off and 14.4 V clamping as SMAJ8.5CA but with triple the peak pulse power (1500 W vs. 400 W) and DO-215AB packaging versus DO-214AC. This makes SMCG8.5CA-E3/9AT capable of surviving higher-energy surges like ISO 7637-2 Pulse 5a, while its smaller footprint allows denser layouts. Designers selecting SMCG8.5CA-E3/9AT gain automotive-grade ruggedness without sacrificing board area - a direct advantage over SMAJ8.5CA in demanding environments.
SMCG8.5CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCG8.5CA-E3/9AT FAQ
1.How can I place an order for SMCG8.5CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5CA-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 SMCG8.5CA-E3/9AT reliable?
The price and inventory of SMCG8.5CA-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 SMCG8.5CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG8.5CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5CA-E3/9AT?
SMCG8.5CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5CA-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 SMCG8.5CA-E3/9AT?
For technical support, including SMCG8.5CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG8.5CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG8.5CA-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 SMCG8.5CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG8.5CA-E3/9AT?
All SMCG8.5CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5CA-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 SMCG8.5CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG8.5CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5CA-E3/9AT Tags
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