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Vishay General Semiconductor - Diodes Division SMCG70A-E3/57T
- Part No.:
- SMCG70A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG70A-E3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,064
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Product details
Overview
SMCG70A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in DO-215AB (SMCG) package, with 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 13.3 A peak pulse current (IPPM) at 10/1000 µs waveform - designed for robust overvoltage protection of power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCG70A-E3/57T datasheet, SMCG70A-E3/57T pinout, SMCG70A-E3/57T application, or SMCG70A-E3/57T equivalent, key selection criteria include clamping voltage (VC = 113 V), low incremental surge resistance, AEC-Q101 qualification, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCG70A-E3/57T employs a glass-passivated silicon avalanche junction optimized for fast response (<1 ns) to ESD and lightning-induced transients. Its unidirectional polarity features a cathode band marking and operates with 1.0 µA max reverse leakage at VWM = 70 V.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets MSL Level 1 per J-STD-020 and is rated for 200 A IFSM (8.3 ms half-sine surge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 77.8 V / 86.0 V at IT = 1.0 mA - ensures reliable avalanche initiation across production lot |
| VC @ IPPM | 113 V at IPPM = 13.3 A (10/1000 µs) - defines worst-case clamped voltage seen by protected circuit |
| PPPM | 1500 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves system standby power integrity |
| TJ max | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-215AB (SMCG) - low-profile, gull-wing surface-mount outline with matte tin-plated leads; compliant with J-STD-002 and JESD 22-B102 solderability standards; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; forms cathode-to-anode path during clamping |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to higher-potential rail (e.g., VBUS); defines polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity and thermal stress |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics without additional qualification effort |
| MSL Level 1 rating | Enables direct placement without baking; compatible with standard reflow profiles up to 260 °C peak |
| Low RθJL (15 °C/W) | Supports efficient heat transfer to PCB copper, critical for sustained surge handling in compact layouts |
| 1500 W PPPM @ 10/1000 µs | Provides margin against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges in 12 V systems |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump transients in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping transients within 1 ns to limit voltage to ≤113 V. Use Value: Prevents MCU reset or latch-up during ISO 7637-2 Pulse 5a events up to 35 V/100 ms, leveraging 1500 W PPPM rating. |
Use Scenario: Safeguarding IGBT gate drivers from Miller-induced voltage spikes during high-dI/dt switching in variable-frequency drives. IC Role / Device Role / Timing Role: TVS mounted directly across gate-source terminals to clamp overshoot exceeding ±20 V. Use Value: Limits gate voltage excursion to 113 V peak, preserving driver IC integrity and preventing false turn-on due to dv/dt coupling. |
| Telecom DC Power Interface | Consumer Appliance Main Board Surge Protection |
Use Scenario: Shielding PoE-powered Ethernet switch ports from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Unidirectional SMCG70A-E3/57T placed upstream of DC-DC converter input stage. Use Value: Clamps IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) surges to ≤113 V, protecting downstream regulators. |
Use Scenario: Protecting mainboard MCU supply rails in washing machines exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: TVS installed at AC-DC adapter output to suppress transients from brushed motor commutation noise. Use Value: Withstands 200 A IFSM (8.3 ms) and maintains <1 µA leakage at 70 V, ensuring no standby current penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/57T | Lower PPPM (400 W), SMA package (DO-214AC), higher RθJA (~110 °C/W) | Suitable for lower-energy transients; less effective in automotive load dump scenarios | Select when board space is constrained and surge energy is limited to IEC 61000-4-2/4-4 levels |
| SMCJ70A-E3/57T | Same DO-214AB package but higher PPPM (1500 W), identical VWM/VBR/VC specs | Not AEC-Q101 qualified; lacks automotive reliability validation | Prefer SMCG70A-E3/57T where AEC-Q101 compliance is mandatory for OEM automotive programs |
Compared with SMAJ70A-E3/57T and SMCJ70A-E3/57T, the SMCG70A-E3/57T delivers equivalent clamping performance with automotive-grade qualification and superior thermal dissipation (RθJL = 15 °C/W vs. ~25 °C/W for SMCJ), making it optimal for high-reliability 12 V/24 V systems requiring long-term field stability.
Availability
SMCG70A-E3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom DC power interface protection requiring stable component supply and full traceability.
Supply support for SMCG70A-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, and transient protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCG series targets high-energy transient suppression in space-constrained, high-reliability applications - engineered specifically for AEC-Q101 compliance, low-profile SMT assembly, and robust performance under repetitive surge stress.
FAQ
What is the clamping voltage of SMCG70A-E3/57T under a 10/1000 µs surge?
The SMCG70A-E3/57T has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM = 13.3 A) using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on the protected circuit during transient events. The SMCG70A-E3/57T maintains this clamping performance across its full operating temperature range.
Is SMCG70A-E3/57T suitable for automotive applications?
Yes, SMCG70A-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and infotainment power supplies. Its construction - glass-passivated junction, MSL Level 1 rating, and –55 °C to +150 °C operating range - meets stringent automotive environmental and reliability requirements. The SMCG70A-E3/57T is listed in Vishay's AEC-Q101 qualified product portfolio.
What is the package type and lead finish of SMCG70A-E3/57T?
The SMCG70A-E3/57T uses the DO-215AB (SMCG) surface-mount package with gull-wing leads. Its terminals feature matte tin plating, certified solderable per J-STD-002 and JESD 22-B102, and pass JESD 201 Class 2 whisker testing. The "E3" suffix confirms RoHS compliance and industrial-grade qualification, while "57T" denotes 7-inch tape-and-reel packaging with 850 units per reel.
How does SMCG70A-E3/57T differ from bidirectional variants like SMCG70CA?
The SMCG70A-E3/57T is unidirectional, with polarity indicated by a cathode band, and conducts only in reverse breakdown to clamp positive transients on the cathode side. In contrast, SMCG70CA is bidirectional, symmetric in both directions, and lacks polarity marking. The SMCG70A-E3/57T offers lower leakage (<1.0 µA) and supports forward conduction for certain crowbar configurations - functionality not available in the CA variant.
What is the thermal resistance and maximum power dissipation of SMCG70A-E3/57T?
The SMCG70A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. Its steady-state power dissipation (PD) is 6.5 W at TA = 50 °C. These values enable effective heat transfer in dense PCB layouts and support repeated surge handling without thermal runaway. The SMCG70A-E3/57T derates linearly above 25 °C ambient per Figure 2 in the datasheet.
SMCG70A-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):
- 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)
SMCG70A-E3/57T FAQ
1.How can I place an order for SMCG70A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG70A-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 SMCG70A-E3/57T reliable?
The price and inventory of SMCG70A-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 SMCG70A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG70A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG70A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG70A-E3/57T?
SMCG70A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG70A-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 SMCG70A-E3/57T?
For technical support, including SMCG70A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG70A-E3/57T requirements.
6.How does Aetrix verify that SMCG70A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG70A-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 SMCG70A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG70A-E3/57T?
All SMCG70A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG70A-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 SMCG70A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG70A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG70A-E3/57T Tags
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