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Vishay General Semiconductor - Diodes Division SMCG70CAHE3/9AT
- Part No.:
- SMCG70CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG70CAHE3/9AT.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,968
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Product details
Overview
SMCG70CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection on signal and power lines. It features a 70 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 113 V at 13.3 A IPPM, AEC-Q101 qualification, and RoHS compliance with HE3 suffix. It protects automotive sensor interfaces and industrial I/O against inductive switching transients.
For engineers reviewing the SMCG70CAHE3/9AT datasheet, SMCG70CAHE3/9AT pinout, SMCG70CAHE3/9AT application, or SMCG70CAHE3/9AT equivalent, key selection criteria include bidirectional clamping behavior, 10/1000 µs waveform capability, junction temperature range (−55 °C to +150 °C), thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a voltage-clamped shunt protector: during overvoltage events exceeding its breakdown threshold (VBR min = 77.8 V, max = 86.0 V), it rapidly transitions from high-impedance to low-impedance state to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage and fast response (<1 ns).
Rated for 1500 W peak pulse power under 10/1000 µs waveform and 200 A unidirectional IFSM (not applicable here due to bidirectional configuration), it relies on thermal dissipation via copper pad layout (0.31" × 0.31") and exhibits low incremental surge resistance - critical for limiting let-through voltage during ESD or lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V or 60 V nominal systems. |
| VBR (min/max) | 77.8 V / 86.0 V - breakdown occurs within this band at 10 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 113 V - clamping voltage measured at 13.3 A peak pulse current; determines maximum voltage seen by protected IC during surge. |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform; supports robust protection against ISO 7637-2 Pulse 1/2/5a/b and IEC 61000-4-5 surges. |
| ID @ VWM | 1.0 µA - reverse leakage at rated stand-off voltage; negligible loading on high-impedance sensor or communication lines. |
| TJ max. | +150 °C - maximum junction temperature rating; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; informs PCB thermal design for sustained power dissipation. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing package with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 molding compound, and AEC-Q101 qualification. Bidirectional devices have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive half-cycle) | Acts as cathode during negative transients; symmetrical conduction enables bidirectional clamping without external polarity constraints. |
| Cathode | Surge current entry (negative half-cycle) | Acts as anode during positive transients; dual-terminal symmetry eliminates need for orientation-aware PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements. |
| Glass passivated junction | Ensures stable VBR tolerance, low leakage drift over temperature/humidity, and long-term reliability in harsh environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive CMOS inputs. |
| MSL Level 1 moisture sensitivity | Enables standard SMT assembly without baking; compatible with high-volume automated placement and lead-free reflow profiles. |
| Bidirectional clamping | Protects AC-coupled or floating lines (e.g., CAN bus, RS-485, sensor bridges) without requiring external series components or polarity awareness. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground to clamp transients before they reach ADC input or signal conditioner. Use Value: Maintains signal integrity under ISO 16750-2 load dump (up to 120 V) while surviving repeated 1500 W surges per 10/1000 µs waveform. |
Use Scenario: Safeguarding 24 V DC digital input cards in PLCs against field-wiring induced surges from relay coil switching or motor contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each channel, mounted adjacent to connector to minimize trace inductance. Use Value: Limits let-through voltage to ≤113 V during 13.3 A surge, preventing latch-up or gate oxide damage in optocoupler or Schmitt trigger inputs. |
| Automotive CAN Bus Node | Telecom Line Interface |
Use Scenario: Secondary protection on CAN_H/CAN_L lines downstream of common-mode chokes in gateway ECUs or telematics units. IC Role / Device Role / Timing Role: Bidirectional clamping element absorbing differential-mode surges that bypass common-mode filtering. Use Value: Symmetrical clamping ensures equal protection on both lines without polarity concerns, supporting CAN FD data rates up to 5 Mbps. |
Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI pairs) in industrial switches subjected to lightning-induced surges on PoE or data lines. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF typical at 0 V) placed directly at connector to suppress fast transients before signal conditioning. Use Value: Clamps 1 kV/1.2 µs × 50 µs surges to <113 V while adding minimal signal distortion due to controlled capacitance and fast response. |
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) and PPPM (1500 W), but SMA (DO-214AC) package; higher RθJA (95 °C/W); not AEC-Q101 qualified. | Limited to commercial/industrial use; unsuitable for automotive under-hood deployment due to qualification gap and thermal derating. | Select when cost or legacy footprint compatibility outweighs automotive qualification and thermal performance needs. |
| SMCJ70CA | Same VWM and PPPM, but larger SMC (DO-214AB) package; RθJA = 50 °C/W; AEC-Q101 qualified; higher IFSM (400 A). | Better thermal performance and surge endurance; requires larger PCB area; suitable for high-reliability industrial power supplies. | Prefer when higher surge repetition rate or extended thermal margin is required, and board space permits larger footprint. |
Compared with SMAJ70CA and SMCJ70CA, SMCG70CAHE3/9AT delivers AEC-Q101 qualification and optimized thermal resistance (75 °C/W) in the smallest qualified DO-215AB footprint - balancing automotive compliance, surge robustness, and space-constrained layout requirements.
Availability
SMCG70CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG70CAHE3/9AT 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 application-specific optimization.
The SMCG series targets high-reliability transient suppression in space-constrained automotive and industrial systems, combining AEC-Q101 qualification, low-profile packaging, and precise clamping performance for next-generation electronic control units.
FAQ
What does the "HE3" suffix indicate in SMCG70CAHE3/9AT?
The HE3 suffix in SMCG70CAHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive-grade reliability standards including temperature cycling, humidity bias, and mechanical shock testing - essential for under-hood and safety-critical applications where SMCG70CAHE3/9AT is deployed.
Is SMCG70CAHE3/9AT unidirectional or bidirectional?
SMCG70CAHE3/9AT is a bidirectional transient voltage suppressor, as indicated by the "CA" suffix. It provides symmetrical clamping for both polarities, making it suitable for AC-coupled lines like CAN bus, RS-485, or bridge sensor outputs - unlike unidirectional variants (e.g., SMCG70A) which require correct polarity orientation during PCB layout.
What is the clamping voltage of SMCG70CAHE3/9AT at rated surge current?
The clamping voltage (VC) of SMCG70CAHE3/9AT is 113 V at 13.3 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value defines the maximum voltage imposed on protected circuitry during a surge event and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Can SMCG70CAHE3/9AT be used in place of SMCG70A?
No - SMCG70CAHE3/9AT is bidirectional while SMCG70A is unidirectional; they differ in polarity marking, leakage behavior, and application scope. Substituting SMCG70CAHE3/9AT for SMCG70A would eliminate cathode/anode orientation requirements but may alter leakage paths in DC-biased circuits. Always verify system-level polarity and bias conditions before interchange.
What is the thermal resistance of SMCG70CAHE3/9AT, and how does it affect PCB layout?
SMCG70CAHE3/9AT 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. This value assumes optimal thermal land pattern - reducing pad size or omitting thermal vias increases junction temperature, potentially derating surge capability or shortening lifetime in high-temperature environments.
SMCG70CAHE3/9AT 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG70CAHE3/9AT FAQ
1.How can I place an order for SMCG70CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG70CAHE3/9AT 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 SMCG70CAHE3/9AT reliable?
The price and inventory of SMCG70CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG70CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG70CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG70CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG70CAHE3/9AT?
SMCG70CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG70CAHE3/9AT 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 SMCG70CAHE3/9AT?
For technical support, including SMCG70CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG70CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG70CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG70CAHE3/9AT 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 SMCG70CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG70CAHE3/9AT?
All SMCG70CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG70CAHE3/9AT, 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 SMCG70CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG70CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG70CAHE3/9AT Tags
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