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Vishay General Semiconductor - Diodes Division SMCG70AHE3/9AT
- Part No.:
- SMCG70AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG70AHE3/9AT.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,625
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Product details
Overview
SMCG70AHE3/9AT from Vishay General Semiconductor is a unidirectional 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) at 1 mA, 1500 W peak pulse power (10/1000 µs), 13.3 A maximum clamping current (IPPM), and clamps to ≤113 V at rated surge. It is AEC-Q101 qualified and RoHS compliant, targeting automotive power line and sensor interface protection.
For engineers reviewing the SMCG70AHE3/9AT datasheet, SMCG70AHE3/9AT pinout, SMCG70AHE3/9AT application, or SMCG70AHE3/9AT equivalent, this page delivers verified electrical parameters, mechanical package details, real-world use cases in automotive and industrial systems, and validated alternative parts with functional trade-offs.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at 70 V), while its low incremental surge resistance enables effective suppression of fast-rising transients such as ISO 7637-2 pulses or inductive switching spikes.
The SMCG70AHE3/9AT is rated for TJ = –55 °C to +150 °C operation and exhibits RθJA = 75 °C/W and RθJL = 15 °C/W thermal resistance. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for under-hood automotive environments where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V/24 V automotive supply rails. |
| VBR (min/max) | 77.8 V / 86.0 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | ≤113 V at IPPM = 13.3 A - Clamping voltage limits stress on protected ICs (e.g., CAN transceivers, microcontrollers) during 10/1000 µs surges. |
| PPPM | 1500 W - Peak pulse power rating supports high-energy transients like load dump (ISO 16750-2) when mounted on 8 mm × 8 mm copper pads. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on automotive modules. |
| TJ max. | +150 °C - Enables placement near heat sources (e.g., power converters) without derating concerns in engine control units. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity marked by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-impedance return path; forms clamping loop with cathode during transient events. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., LIN bus, sensor VCC); carries full surge current to ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC test plan. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in harsh under-hood environments. |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak, eliminating bake requirements prior to SMT assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., <100 ns rise time), improving protection margin for high-speed interfaces. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power inputs in body control modules against load dump and jump-start transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC/DC input, absorbing >1500 W surges within microseconds. Use Value: Limits voltage seen by downstream regulators to ≤113 V, preventing latch-up or permanent damage to PMICs and microcontrollers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation equipment exposed to relay coil flyback. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS connected across sensor output and ground, suppressing <100 ns spikes without loading the signal path. Use Value: Maintains signal fidelity and ADC accuracy while surviving repeated 1 kV/µs transients common in motor-driven PLC cabinets. |
| Automotive LIN Bus Protection | Telecom Power Supply Input Protection |
Use Scenario: Shielding LIN transceiver pins from ESD and cable discharge events in door module networks. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) unidirectional TVS placed at LIN bus connector, referenced to local ground. Use Value: Clamps ESD strikes (IEC 61000-4-2 ±8 kV contact) to <113 V before transceiver input exceeds absolute maximum ratings. | Use Scenario: Guarding AC/DC adapter primary-side inputs against lightning-induced surges in outdoor telecom base stations. IC Role / Device Role / Timing Role: High-power (1500 W) TVS installed upstream of rectifier bridge, shunting multi-millisecond surges to earth ground. Use Value: Withstands 10/1000 µs waveform surges up to 13.3 A without degradation, extending system uptime in lightning-prone regions. |
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 | Same VWM (70 V), lower PPPM (400 W), SMA (DO-214AC) package, RθJA = 100 °C/W | Lower surge handling; suitable only for non-load-dump scenarios (e.g., board-level ESD). | Select if cost or board space is constrained and surge energy is limited to <400 W. |
| SMCJ70AHE3/9AT | Same VWM (70 V), higher PPPM (1500 W), identical SMCG (DO-215AB) package, AEC-Q101 qualified | No functional difference; SMCJ70AHE3/9AT is same family with identical specs and qualification. | Not a true alternative-same device under alternate naming convention; verify manufacturer's cross-reference before substitution. |
Compared with SMAJ70A-E3/57T, SMCG70AHE3/9AT delivers 3.75× higher surge power handling and superior thermal performance (RθJA = 75 vs. 100 °C/W), making it appropriate for automotive load dump; versus SMCJ70AHE3/9AT, it is functionally identical-no design impact from substitution if sourcing confirms identical traceability and qualification status.
Availability
SMCG70AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and 13" tape-and-reel delivery.
Supply support for SMCG70AHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in demanding automotive and industrial power systems where AEC-Q101 compliance and thermal robustness are mandatory.
FAQ
What is the clamping voltage of SMCG70AHE3/9AT at its rated peak pulse current?
The SMCG70AHE3/9AT clamps to a maximum of 113 V when subjected to its rated peak pulse current (IPPM) of 13.3 A under a 10/1000 µs waveform. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per JEDEC standard layout, ensuring repeatable thermal performance in production designs.
Is SMCG70AHE3/9AT suitable for bidirectional transient protection?
No, SMCG70AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMCG70CA variant. Using SMCG70AHE3/9AT in bidirectional applications risks forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
Does SMCG70AHE3/9AT require derating at elevated ambient temperatures?
Yes, SMCG70AHE3/9AT must be derated above TA = 25 °C per Figure 2 in the datasheet. At 85 °C ambient, its peak pulse power capability drops to approximately 75% of the 1500 W rating, and at 125 °C, it falls to ~45%. Designers must apply thermal modeling or consult the derating curve to ensure safe operation in high-temperature enclosures.
What does the "HE3" suffix signify in SMCG70AHE3/9AT?
The "HE3" suffix in SMCG70AHE3/9AT indicates RoHS-compliant construction with AEC-Q101 qualification. "H" denotes AEC-Q101 qualification, "E3" specifies matte tin plating and industrial-grade RoHS compliance. The "9AT" denotes 13-inch tape-and-reel packaging with 3500 units per reel, optimized for high-volume SMT assembly.
Can SMCG70AHE3/9AT be used in place of SMAJ70A for automotive applications?
SMCG70AHE3/9AT is not a direct replacement for SMAJ70A in automotive applications due to significant differences: SMAJ70A has only 400 W PPPM and lacks AEC-Q101 qualification. Substituting it for SMCG70AHE3/9AT in load dump or ISO 7637-2 scenarios risks catastrophic failure. SMCG70AHE3/9AT must be used where 1500 W surge handling and automotive qualification are required.
SMCG70AHE3/9AT 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG70AHE3/9AT FAQ
1.How can I place an order for SMCG70AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG70AHE3/9AT 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 SMCG70AHE3/9AT reliable?
The price and inventory of SMCG70AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG70AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG70AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG70AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG70AHE3/9AT?
SMCG70AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG70AHE3/9AT 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 SMCG70AHE3/9AT?
For technical support, including SMCG70AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG70AHE3/9AT requirements.
6.How does Aetrix verify that SMCG70AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG70AHE3/9AT 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 SMCG70AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG70AHE3/9AT?
All SMCG70AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG70AHE3/9AT, 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 SMCG70AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG70AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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