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Vishay General Semiconductor - Diodes Division SMCG70CA-E3/57T
- Part No.:
- SMCG70CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG70CA-E3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,321
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Product details
Overview
SMCG70CA-E3/57T 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 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps to ≤113 V at 13.3 A peak pulse current - ideal for automotive sensor signal line protection against load dump and ESD.
For engineers reviewing the SMCG70CA-E3/57T datasheet, SMCG70CA-E3/57T pinout, SMCG70CA-E3/57T application, or SMCG70CA-E3/57T equivalent, this device is evaluated for AEC-Q101 qualification, low incremental surge resistance, fast response time, and compatibility with automated SMT assembly on industrial and automotive PCBs.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35. Its glass-passivated junction ensures stable clamping performance under repetitive surge stress, and its thermal resistance (RθJA = 75 °C/W) supports operation up to +150 °C junction temperature when mounted on 8.0 mm × 8.0 mm copper pads.
The device complies with J-STD-020 MSL Level 1 (peak reflow 260 °C), uses matte tin-plated leads, and meets UL 94 V-0 flammability requirements. The CA suffix confirms bidirectional functionality, and the E3/57T ordering code indicates RoHS-compliant, industrial-grade packaging in 7" tape-and-reel (850 units).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - guaranteed breakdown range ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | ≤113 V at 13.3 A (10/1000 μs) - clamping voltage limits downstream IC stress during transients. |
| PPPM | 1500 W - peak surge power handling capacity for short-duration lightning or inductive-switching events. |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - enables deployment in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and surge endurance. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with 8.0 mm × 8.0 mm recommended copper pad area per terminal. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Accepts surge current during positive voltage excursions; symmetrical with cathode in bidirectional mode. |
| Cathode | Transient current entry (negative half-cycle) | Accepts surge current during negative voltage excursions; functionally identical to anode for CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in differential or AC-coupled lines. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including high-temp surge endurance and mechanical shock - suitable for ADAS sensor interfaces. |
| Low Rsurge | Minimizes voltage overshoot during fast transients - critical for protecting 3.3 V or 5 V logic-level interfaces. |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak - supports high-yield automated assembly without baking. |
| Glass passivation | Stable junction characteristics over lifetime - prevents parameter drift under humidity or thermal cycling stress. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins from load-dump spikes and ESD in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: Clamps 10/1000 μs surges to ≤113 V while maintaining <1.0 μA leakage - preserves bus signal fidelity and avoids false triggering. |
Use Scenario: Safeguarding RS-485/RS-422 differential pairs in factory automation PLCs exposed to motor switching noise. IC Role / Device Role / Timing Role: Common-mode TVS across A/B lines to suppress common-mode transients without distorting differential signaling. Use Value: Symmetrical clamping ensures equal protection on both lines; 1500 W rating handles repetitive 4 kV EFT bursts per IEC 61000-4-4. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Input-stage protection for USB-C PD adapters subjected to AC line surges and hot-plug transients. IC Role / Device Role / Timing Role: Primary TVS between bridge rectifier output and bulk capacitor to absorb energy before downstream regulation. Use Value: 70 V VWM aligns with 65 V DC bus; 113 V VC prevents overvoltage stress on 100 V-rated electrolytics and MOSFETs. |
Use Scenario: Overvoltage protection on POTS line interface cards in central office equipment facing lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense across tip/ring terminals before hybrid transformer and codec ICs. Use Value: UL 497B recognition and 1500 W PPPM meet Telcordia GR-1089-CORE Level 3 requirements for primary protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70CA | Same VWM (70 V), lower PPPM (400 W), SMA package (DO-214AC), higher RθJA (110 °C/W) | Limited to lower-energy transients; unsuitable for automotive under-hood use due to thermal limitations | Select when cost or board space is prioritized over surge robustness and AEC-Q101 compliance |
| SMCJ70CA | Same VWM (70 V), higher PPPM (1500 W), SMC package (DO-214AB), same RθJA (75 °C/W), AEC-Q101 qualified | Requires larger PCB footprint (7.11 mm × 6.22 mm vs. SMCG's 7.11 mm × 5.59 mm); identical clamping performance | Choose when existing SMC footprint is standardized and higher creepage/clearance is needed |
Compared with SMAJ70CA and SMCJ70CA, the SMCG70CA-E3/57T delivers identical surge capability in a smaller, gull-wing package optimized for fine-pitch automated placement - making it preferred for space-constrained automotive ECUs and high-density telecom modules where thermal performance and reliability are co-prioritized.
Availability
SMCG70CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and telecom line card surge protection requiring stable component supply and full traceability.
Supply support for SMCG70CA-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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SMCG series was developed for high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-profile gull-wing packaging, and precise bidirectional clamping for next-generation electronic control units.
FAQ
What does the "CA" suffix indicate in SMCG70CA-E3/57T?
The "CA" suffix in SMCG70CA-E3/57T denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Electrical characteristics-including breakdown voltage, clamping voltage, and peak pulse current-are identical for positive and negative voltage excursions, enabling use on AC-coupled or differential signal lines without polarity concerns. This is confirmed in Vishay's datasheet Document Number 88457, Section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMCG70CA-E3/57T qualified for automotive applications?
Yes, SMCG70CA-E3/57T is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88457, page 2, Mechanical Data section). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and surge endurance-making it suitable for under-hood and chassis-mounted automotive electronics such as ADAS sensors, body control modules, and infotainment power supplies.
What is the maximum clamping voltage of SMCG70CA-E3/57T at rated surge current?
The maximum clamping voltage (VC) of SMCG70CA-E3/57T is 113 V at 13.3 A peak pulse current (IPPM), measured using the standard 10/1000 μs waveform. This value is specified in the "ELECTRICAL CHARACTERISTICS" table on page 2 of the Vishay datasheet (Document Number 88457) and represents the upper limit of voltage seen by protected circuitry during worst-case transient events.
Does SMCG70CA-E3/57T require polarity-aware PCB layout?
No, SMCG70CA-E3/57T does not require polarity-aware layout because it is a bidirectional TVS diode with no cathode marking and identical electrical behavior in both directions. As confirmed in the Vishay datasheet (page 2, "Mechanical Data" section), bidirectional types like SMCG70CA-E3/57T have no polarity band and may be placed in either orientation - simplifying layout and reducing assembly errors in differential or AC signal paths.
What is the thermal resistance and recommended mounting for SMCG70CA-E3/57T?
SMCG70CA-E3/57T 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, as specified in the "THERMAL CHARACTERISTICS" table (page 3, Document Number 88457). This pad size is required to achieve rated power dissipation and prevent thermal runaway during repeated surge events - deviating from this layout reduces safe operating area and may trigger premature failure.
SMCG70CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.3A
- 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)
SMCG70CA-E3/57T FAQ
1.How can I place an order for SMCG70CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG70CA-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 SMCG70CA-E3/57T reliable?
The price and inventory of SMCG70CA-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 SMCG70CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG70CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG70CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG70CA-E3/57T?
SMCG70CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG70CA-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 SMCG70CA-E3/57T?
For technical support, including SMCG70CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG70CA-E3/57T requirements.
6.How does Aetrix verify that SMCG70CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG70CA-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 SMCG70CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG70CA-E3/57T?
All SMCG70CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG70CA-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 SMCG70CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG70CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG70CA-E3/57T Tags
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