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Vishay General Semiconductor - Diodes Division SMCG78AHE3/57T
- Part No.:
- SMCG78AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG78AHE3/57T.pdf
- Description:
- TVS DIODE 78VWM 126VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,075
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Product details
Overview
SMCG78AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, with a 78 V stand-off voltage (VWM), 86.7–95.8 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and 11.9 A peak pulse current (IPPM) at 10/1000 µs. It protects MOSFETs and signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the SMCG78AHE3/57T datasheet, SMCG78AHE3/57T pinout, SMCG78AHE3/57T application, or SMCG78AHE3/57T equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low incremental surge resistance, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly and high-reliability automotive environments.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown range (86.7–95.8 V at 1 mA). Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Designed for placement directly across sensitive inputs or power rails, it delivers sub-nanosecond response time and clamps to ≤126 V at 11.9 A (10/1000 µs), limiting energy dissipation in downstream circuitry while maintaining <1.0 µA leakage at 78 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 78 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 86.7 V / 95.8 V at 1 mA - Confirmed avalanche initiation window for design margining |
| VC @ IPPM | 126 V at 11.9 A (10/1000 µs) - Clamped voltage seen by protected IC during worst-case surge |
| PPPM | 1500 W - Peak transient power it can absorb without failure per standard waveform |
| ID @ VWM | ≤1.0 µA - Reverse leakage ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - Junction temperature limit enabling operation in under-hood automotive environments |
| Package | SMCG (DO-215AB) - Low-profile, MSL Level 1 compliant surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement |
Pinout & Package
SMCG78AHE3/57T uses the SMCG (DO-215AB) package: a gull-wing surface-mount outline with two terminals, cathode marked by a band. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / surge return path | Connected to ground or low-impedance return plane; carries full IPPM during clamping |
| Cathode | Protected line connection / high-side clamp node | Connected to the line being protected (e.g., gate drive rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications per stress test requirements |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter shift |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without preconditioning |
| Low incremental surge resistance | Minimizes VC rise under high-current surges, improving protection margin for 48 V systems |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting IGBT gate drivers in 48 V electric compressor inverters from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate and source to clamp negative transients and prevent gate oxide rupture. Use Value: Limits clamped voltage to 126 V, staying within 80 % of typical 150 V gate-source rating and enabling robust 48 V system design. | Use Scenario: Safeguarding isolated gate driver outputs in servo motor controllers exposed to back-EMF spikes during rapid deceleration. IC Role / Device Role / Timing Role: Fast-response clamping element on the high-side output rail to suppress >1 kV/µs transients before they reach the driver IC. Use Value: Sub-nanosecond response and 1500 W PPPM capability prevent latch-up or permanent damage during repeated motor stall events. |
| Automotive Body Electronics | Telecom DC Power Interface |
Use Scenario: Shielding LIN bus transceivers and microcontroller I/O pins in door module ECUs from ESD and load dump coupling. IC Role / Device Role / Timing Role: Primary board-level TVS on 12 V supply rail feeding the LIN transceiver, located adjacent to connector entry point. Use Value: AEC-Q101 qualification and ≤1.0 µA leakage ensure compliance with automotive EMC and sleep-mode current budgets. | Use Scenario: Protecting PoE-powered equipment front-end DC-DC converters from lightning-induced surges on 48 V input lines. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary gas discharge tube, providing precise clamping and fast follow-on protection. Use Value: 126 V clamping voltage aligns with 48 V PoE+ system derating requirements and avoids overvoltage stress on downstream FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ78A-E3/57T | Same VWM (78 V) and PPPM (400 W), but lower 400 W rating and SMA (DO-214AC) package | Lower power handling limits use to <500 W surge environments; smaller footprint but higher thermal resistance | Select when space-constrained and surge energy is limited to IEC 61000-4-5 Level 3 |
| SMCJ78A-E3/57T | Same VWM (78 V) and DO-214AB package, but 1500 W PPPM and 13.3 A IPPM at 10/1000 µs | Larger SMC (DO-214AB) footprint; higher RθJA (100 °C/W vs. 75 °C/W) reduces thermal headroom | Choose when existing SMC land pattern is fixed and AEC-Q101 is not required |
Compared with SMAJ78A-E3/57T and SMCJ78A-E3/57T, SMCG78AHE3/57T uniquely combines AEC-Q101 qualification, DO-215AB's optimized thermal performance (RθJA = 75 °C/W), and gull-wing leadform for improved manufacturability-making it the preferred choice for new automotive designs requiring both reliability and process compatibility.
Availability
SMCG78AHE3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drives, body electronics, and telecom DC power interface applications requiring stable component supply, AEC-Q101 compliance, and high-energy transient suppression.
Supply support for SMCG78AHE3/57T 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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade qualification.
The SMCG TransZORB® series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 validation and consistent clamping performance are mandatory.
FAQ
What is the breakdown voltage range of SMCG78AHE3/57T?
The SMCG78AHE3/57T has a guaranteed breakdown voltage (VBR) range of 86.7 V to 95.8 V at a test current of 1 mA, measured per ANSI/IEEE C62.35. This window defines the minimum and maximum voltage at which the device enters avalanche conduction, critical for designing appropriate safety margins in 78 V nominal systems.
Is SMCG78AHE3/57T qualified for automotive applications?
Yes, SMCG78AHE3/57T is AEC-Q101 qualified, as confirmed in the Vishay document 88457. The HE3 suffix explicitly denotes AEC-Q101 qualification, RoHS compliance, and industrial grade rating-making SMCG78AHE3/57T suitable for automotive powertrain, chassis, and body electronics where reliability under thermal and mechanical stress is required.
What is the clamping voltage of SMCG78AHE3/57T under a 10/1000 µs surge?
At its rated peak pulse current of 11.9 A (IPPM) with a 10/1000 µs waveform, SMCG78AHE3/57T clamps to a maximum of 126 V. This value is measured under standardized conditions on 8.0 mm × 8.0 mm copper pads and represents the upper bound of voltage imposed on protected circuitry during worst-case transient events.
Does SMCG78AHE3/57T have polarity marking, and how is it identified?
Yes, SMCG78AHE3/57T is unidirectional and features a cathode band on the package body. Per Vishay documentation, the band denotes the cathode terminal, which must be connected to the line being protected (e.g., 78 V rail), while the anode connects to ground or return. Bidirectional variants omit this marking, confirming SMCG78AHE3/57T's unidirectional identity.
What packaging format is used for SMCG78AHE3/57T, and what is the reel quantity?
SMCG78AHE3/57T is supplied in 7" diameter plastic tape and reel format with a base quantity of 850 units per reel. The "57T" in the part number specifies this packaging option, and the device meets J-STD-020 MSL Level 1, allowing direct placement without baking or dry pack handling.
SMCG78AHE3/57T 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):
- 78V
- Voltage - Breakdown (Min):
- 86.7V
- Voltage - Clamping (Max) @ Ipp:
- 126V
- Current - Peak Pulse (10/1000µs):
- 11.9A
- 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)
SMCG78AHE3/57T FAQ
1.How can I place an order for SMCG78AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG78AHE3/57T 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 SMCG78AHE3/57T reliable?
The price and inventory of SMCG78AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG78AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG78AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG78AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG78AHE3/57T?
SMCG78AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG78AHE3/57T 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 SMCG78AHE3/57T?
For technical support, including SMCG78AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG78AHE3/57T requirements.
6.How does Aetrix verify that SMCG78AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG78AHE3/57T 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 SMCG78AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG78AHE3/57T?
All SMCG78AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG78AHE3/57T, 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 SMCG78AHE3/57T part is unused and in its original packaging.
Return procedure for SMCG78AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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