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Vishay General Semiconductor - Diodes Division SMCG70C-E3/9AT
- Part No.:
- SMCG70C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG70C-E3/9AT.pdf
- Description:
- TVS DIODE 70VWM 125VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,571
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Product details
Overview
SMCG70C-E3/9AT from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in DO-215AB (SMCG) package, designed for clamping voltage transients on signal or power lines. It features a 70 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), and clamps to 113 V at 13.3 A (10/1000 µs waveform), with AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG70C-E3/9AT datasheet, SMCG70C-E3/9AT pinout, SMCG70C-E3/9AT application, or SMCG70C-E3/9AT equivalent, key selection criteria include bi-directional clamping capability, low incremental surge resistance, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates symmetrically in both directions, with no polarity marking-unlike uni-directional variants that use a cathode band. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), enabling protection against ESD, lightning-induced surges, and inductive switching transients.
The SMCG70C-E3/9AT is thermally rated for TJ = –55 °C to +150 °C, with RθJA = 75 °C/W and RθJL = 15 °C/W. It meets UL 94 V-0 flammability requirements and is RoHS-compliant (E3 suffix), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins |
| PPPM | 1500 W - peak transient power it can absorb without failure (10/1000 µs waveform) |
| VC @ IPPM | 113 V - clamped voltage at 13.3 A peak pulse current, defining worst-case overvoltage seen by protected circuit |
| ID @ VWM | 1.0 µA - leakage current at stand-off voltage, ensuring minimal standby power loss |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| MSL Level | Level 1 - no floor life limitation; safe for reflow up to 260 °C peak without baking |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
DO-215AB (SMCG) surface-mount package: gull-wing leads, 0.310" × 0.400" footprint (7.87 mm × 10.16 mm), 0.050" lead pitch, and 0.245" body length (6.22 mm). Bi-directional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied |
| Case / Body | Thermal and mechanical interface | Exposed metal-free plastic body; heat dissipation relies on PCB copper pads (8.0 mm × 8.0 mm per terminal recommended) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures consistent VBR tolerance (±5% typical), long-term stability, and immunity to humidity-induced parameter drift |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast transients, improving protection margin for downstream ICs |
| MSL Level 1 rating | Enables direct placement into high-temperature reflow without pre-baking, reducing manufacturing complexity |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control units, ADAS sensors, and infotainment power rails |
| UL 94 V-0 molding compound | Prevents flame propagation in fault conditions, meeting safety requirements for enclosed automotive and industrial systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input to clamp ±100 V spikes within 1 ns. Use Value: Limits voltage seen by LDOs and microcontrollers to ≤113 V, preventing latch-up or gate oxide damage. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules. IC Role / Device Role / Timing Role: Parallel-connected TVS on differential signal lines to suppress ESD and cable discharge events. Use Value: Maintains signal integrity with <1.0 µA leakage at 70 V, avoiding DC offset errors in precision measurement circuits. |
| Telecom Line Card Surge Protection | Consumer USB Power Delivery Interface |
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on DC bias lines, coordinated with GDT or MOV secondary stages. Use Value: Absorbs 1500 W pulses without degradation, enabling compliance with ITU-T K.21 basic protection level. | Use Scenario: Overvoltage safeguard on VBUS lines in USB-C PD adapters and docking stations. IC Role / Device Role / Timing Role: Fast-response TVS shunting transients from hot-plug or adapter fault events. Use Value: Clamps 70 V nominal rail to 113 V within nanoseconds, protecting USB PD controllers rated for ≤20 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/57T | Uni-directional; 70 V VWM but requires polarity-aware layout; lower PPPM (400 W) | Suitable only where DC bias polarity is fixed and surge direction is known | Select when cost sensitivity outweighs need for bi-directional symmetry and higher power handling |
| SMCJ70CA | Same bi-directional functionality and 70 V VWM, but non-AEC-Q101, commercial-grade only | Limited to non-automotive industrial or consumer use; lacks automotive qualification documentation | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMAJ70A-E3/57T and SMCJ70CA, the SMCG70C-E3/9AT uniquely combines AEC-Q101 qualification, 1500 W PPPM, and bi-directional symmetry in the compact DO-215AB package-making it optimal for space-constrained automotive front-end protection where polarity uncertainty and high-energy transients coexist.
Availability
SMCG70C-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom line card prototyping requiring stable component supply and full traceability.
Supply support for SMCG70C-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, thermal performance, and automotive qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, surface-mount transient suppression in harsh environments-including under-hood automotive, industrial automation, and infrastructure equipment.
FAQ
What is the clamping voltage of the SMCG70C-E3/9AT at its rated peak pulse current?
The SMCG70C-E3/9AT clamps to 113 V at its specified peak pulse current of 13.3 A under the standard 10/1000 µs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, and defines the maximum overvoltage imposed on protected circuitry during transient events. The SMCG70C-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCG70C-E3/9AT suitable for automotive applications?
Yes, the SMCG70C-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction-including glass-passivated junction, MSL Level 1 rating, and –55 °C to +150 °C operating range-meets stringent automotive reliability requirements. The SMCG70C-E3/9AT is commonly deployed in engine control units, body electronics, and ADAS sensor modules where transient immunity is critical.
Does the SMCG70C-E3/9AT have polarity markings?
No, the SMCG70C-E3/9AT does not have polarity markings because it is a bi-directional TVS device. Unlike uni-directional variants (e.g., SMCG70A), which feature a cathode band, the SMCG70C-E3/9AT functions identically regardless of voltage polarity applied across its terminals. This simplifies PCB layout and eliminates orientation errors during automated assembly.
What is the thermal resistance of the SMCG70C-E3/9AT?
According to Vishay's datasheet, the SMCG70C-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a junction-to-lead resistance (RθJL) of 15 °C/W, measured under standard conditions (TA = 25 °C, 0.31" × 0.31" copper pads). These values inform thermal design for sustained power dissipation and transient duty cycle limits. The SMCG70C-E3/9AT must be mounted per recommended pad layout to achieve these ratings.
How does the SMCG70C-E3/9AT differ from the SMCG70A variant?
The SMCG70C-E3/9AT is bi-directional with no polarity marking and symmetrical clamping in both directions, while the SMCG70A is uni-directional and features a cathode band. The SMCG70C-E3/9AT supports applications with AC-coupled or polarity-agnostic signals, whereas the SMCG70A is used where DC bias polarity is fixed. Both share identical VWM (70 V), PPPM (1500 W), and DO-215AB packaging-but only the SMCG70C-E3/9AT is rated for true bi-directional surge suppression.
SMCG70C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
SMCG70C-E3/9AT FAQ
1.How can I place an order for SMCG70C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG70C-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 SMCG70C-E3/9AT reliable?
The price and inventory of SMCG70C-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 SMCG70C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG70C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG70C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG70C-E3/9AT?
SMCG70C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG70C-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 SMCG70C-E3/9AT?
For technical support, including SMCG70C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG70C-E3/9AT requirements.
6.How does Aetrix verify that SMCG70C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG70C-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 SMCG70C-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG70C-E3/9AT?
All SMCG70C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG70C-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 SMCG70C-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG70C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG70C-E3/9AT Tags
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