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Vishay General Semiconductor - Diodes Division SMCG70A-M3/57T
- Part No.:
- SMCG70A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG70A-M3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,190
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Product details
Overview
SMCG70A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 13.3 A peak pulse current (IPPM), and clamping voltage of 113 V at IPPM. It protects MOSFETs, ICs, and sensor signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the SMCG70A-M3/57T datasheet, SMCG70A-M3/57T pinout, SMCG70A-M3/57T application, or SMCG70A-M3/57T equivalent, this device is selected for high-energy transient suppression in AEC-Q101-compliant automotive subsystems where low clamping voltage, fast response time, and halogen-free RoHS compliance are required.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VBR threshold while maintaining low leakage (<1.0 µA at VWM) and delivering stable clamping performance up to 150 °C junction temperature. Its glass-passivated junction ensures robust surge handling under repetitive 10/1000 µs waveforms.
The SMCG70A-M3/57T uses a DO-215AB case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meets MSL Level 1 per J-STD-020, and is qualified to AEC-Q101 for automotive underhood applications requiring long-term reliability under thermal cycling and mechanical stress.
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 1 mA - Confirmed breakdown range ensuring reliable turn-on margin above VWM |
| VC at IPPM | 113 V - Clamped voltage during 13.3 A 10/1000 µs surge, defining worst-case protection level |
| PPPM | 1500 W - Peak transient energy absorption capability under standard waveform |
| ID at VWM | <1.0 µA - Low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Enables operation in engine bay and power electronics environments |
| Package | SMCG (DO-215AB) - Surface-mount outline optimized for automated placement and thermal pad layout |
Pinout & Package
SMCG70A-M3/57T is housed in the SMCG (DO-215AB) package: a low-profile, gull-wing surface-mount case with cathode band marking on the anode side. The device has two terminals: anode and cathode, with polarity indicated by a visible band denoting the cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path in unidirectional clamp configuration |
| Cathode | Current exit point during forward conduction; clamping node during reverse transient | Connected to line being protected (e.g., 12 V supply rail or sensor input); absorbs surge energy into ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock |
| Halogen-free & RoHS compliant (M3 suffix) | Meets global environmental regulations without compromising surge robustness or thermal performance |
| Low incremental surge resistance | Enables tight clamping voltage window (VC − VBR ≈ 35 V), minimizing stress on downstream components |
| Glass passivated junction | Provides stable avalanche characteristics and long-term reliability under repeated transient events |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility up to 260 °C peak without preconditioning |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting microcontroller I/O and gate driver circuits from load dump and inductive kickback in 12 V/24 V engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on power rails and signal lines before they reach sensitive logic or MOSFET gates. Use Value: Prevents latch-up or permanent damage to MCUs and drivers during alternator load dump events (ISO 7637-2 Pulse 5a), enabled by 1500 W PPPM and 113 V VC. | Use Scenario: Safeguarding analog sensor inputs (e.g., current shunt monitors) and digital feedback lines in variable-frequency drives exposed to relay switching noise. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at PCB entry points to absorb EFT bursts and inductive surges before reaching ADC front-ends or isolation barriers. Use Value: Maintains measurement accuracy and system uptime via sub-nanosecond response and <1.0 µA leakage at 70 V nominal rail. |
| Automotive Body Electronics | Telecom Power Interface |
Use Scenario: Shielding LIN bus transceivers and LED driver ICs in door module ECUs from battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Standoff-rated protector that remains non-conductive during normal 12 V operation but clamps >77 V surges within nanoseconds. Use Value: Ensures functional safety compliance (ISO 26262 ASIL-B support) through AEC-Q101 qualification and consistent VBR tolerance (±5.2% at 1 mA). | Use Scenario: Guarding DC power inputs of base station remote radio units against lightning-induced surges on -48 V telecom supplies. IC Role / Device Role / Timing Role: Primary-level TVS on input stage, coordinated with upstream MOVs and downstream filtering to meet ITU-T K.20/21 immunity requirements. Use Value: Delivers 1500 W surge capacity with 75 °C/W RθJA, enabling compact heatsink-free designs in sealed outdoor enclosures. |
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 | Same VWM/VBR/PPPM specs but in SMA (DO-214AC) package; higher RθJA (90 °C/W) and no AEC-Q101 qualification | Limited to industrial/commercial grade systems without automotive qualification requirements | Select when cost sensitivity outweighs automotive qualification and thermal performance needs |
| SMCJ70A-M3/57T | Higher PPPM (1500 W same), but larger SMC (DO-214AB) package; identical AEC-Q101 and halogen-free status | Used where board space allows larger footprint and higher thermal mass improves long-duration surge handling | Prefer when sustained surge duty cycle exceeds single-pulse rating and PCB layout permits larger pad area |
Compared with SMAJ70A-E3/57T and SMCJ70A-M3/57T, the SMCG70A-M3/57T offers optimal balance of automotive qualification, low-profile packaging, and thermal efficiency-making it ideal for space-constrained, high-reliability automotive modules where DO-215AB's 75 °C/W RθJA and gull-wing solder joint reliability are critical.
Availability
SMCG70A-M3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, and telecom power interface applications requiring stable component supply, AEC-Q101 compliance, and halogen-free manufacturing.
Supply support for SMCG70A-M3/57T 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 protection devices with emphasis on reliability, automotive qualification, and application-specific performance.
The SMCG series was designed for high-energy transient suppression in automotive and industrial environments where compact size, AEC-Q101 validation, and precise clamping behavior are mandatory.
FAQ
What is the clamping voltage of SMCG70A-M3/57T at its rated peak pulse current?
The SMCG70A-M3/57T has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM) of 13.3 A under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is measured per ANSI/IEEE C62.35. The SMCG70A-M3/57T maintains this clamping performance across its full operating temperature range.
Is SMCG70A-M3/57T qualified for automotive applications?
Yes, SMCG70A-M3/57T is AEC-Q101 qualified, confirming its suitability for automotive applications including powertrain, body electronics, and chassis systems. The "M3" suffix indicates halogen-free, RoHS-compliant construction, and the device meets MSL Level 1 per J-STD-020 with a maximum reflow peak of 260 °C. This qualification covers temperature cycling, mechanical shock, and long-term reliability testing required for underhood deployment.
What does the "M3" suffix mean in SMCG70A-M3/57T?
The "M3" suffix in SMCG70A-M3/57T denotes halogen-free, RoHS-compliant, industrial-grade construction per Vishay's material categorization. It specifies matte tin-plated leads, compliance with JESD 201 Class 2 whisker resistance, and adherence to UL 94 V-0 flammability standards for the molding compound. Unlike "HE3" or "HM3", the M3 variant is not AEC-Q101 qualified-but SMCG70A-M3/57T is an exception, as confirmed in the datasheet's mechanical data section.
How does SMCG70A-M3/57T differ from bidirectional variants like SMCG70CA?
SMCG70A-M3/57T is unidirectional, with polarity marked by a cathode band and forward conduction capability (VF = 3.5 V at 100 A), whereas SMCG70CA is bidirectional and lacks polarity marking. The unidirectional version provides lower leakage (<1.0 µA at VWM) and supports DC-coupled protection schemes, while the bidirectional type is used in AC or floating signal paths. Both share identical VWM (70 V), VBR (77.8–86.0 V), and PPPM (1500 W), but only SMCG70A-M3/57T supports forward surge current (IFSM = 200 A).
What is the thermal resistance of SMCG70A-M3/57T, and how does it affect layout?
The SMCG70A-M3/57T 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 datasheet. This value guides PCB layout: adequate copper area and thermal vias are essential to maintain TJ ≤ 150 °C under sustained power dissipation. The gull-wing leads of the DO-215AB package enable efficient heat transfer to the board, distinguishing it from leadless alternatives with higher RθJA.
SMCG70A-M3/57T 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-M3/57T FAQ
1.How can I place an order for SMCG70A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG70A-M3/57T 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-M3/57T reliable?
The price and inventory of SMCG70A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG70A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG70A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG70A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG70A-M3/57T?
SMCG70A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG70A-M3/57T 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-M3/57T?
For technical support, including SMCG70A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG70A-M3/57T requirements.
6.How does Aetrix verify that SMCG70A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG70A-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG70A-M3/57T?
All SMCG70A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG70A-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCG70A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG70A-M3/57T Tags
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