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Vishay General Semiconductor - Diodes Division SMCG75A-E3/9AT
- Part No.:
- SMCG75A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG75A-E3/9AT.pdf
- Description:
- TVS DIODE 75VWM 121VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG75A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, with a standoff voltage of 75 V, breakdown voltage range of 83.3–92.1 V at 1 mA, clamping voltage of 121 V at 12.4 A (10/1000 µs), peak pulse power rating of 1500 W, and AEC-Q101 qualification for automotive-grade reliability. It protects MOSFETs and signal lines in engine control units against inductive switching transients.
For engineers reviewing the SMCG75A-E3/9AT datasheet, SMCG75A-E3/9AT pinout, SMCG75A-E3/9AT application, or SMCG75A-E3/9AT equivalent, this page delivers verified electrical parameters, mechanical package details, real-world protection use cases, and validated alternative parts for ESD and surge design-in.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, triggering when reverse voltage exceeds its breakdown threshold to divert transient energy away from downstream components. Its glass-passivated junction ensures stable leakage and low capacitance, while the DO-215AB gull-wing leadform supports automated SMT placement and meets J-STD-020 MSL Level 1 reflow requirements.
The device sustains non-repetitive 10/1000 µs surges up to 12.4 A with ≤121 V clamping, exhibits 1.0 µA max reverse leakage at 75 V, and maintains thermal resistance of 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads - enabling robust transient suppression without active cooling in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown. |
| VBR @ IT = 1 mA | 83.3–92.1 V - Verified breakdown range ensuring reliable turn-on across production lot and temperature. |
| VC @ IPPM = 12.4 A | 121 V - Clamped voltage during 1500 W transient; determines maximum stress imposed on protected IC or MOSFET. |
| IPPM | 12.4 A - Peak surge current capability under standardized 10/1000 µs waveform; used for IEC 61000-4-5 compliance margining. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables single-device protection against high-energy load dump events. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8 mm × 8 mm pad layout; informs board-level thermal design. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: SMCG (DO-215AB), surface-mount gull-wing, matte tin-plated leads, RoHS-compliant (E3 suffix), MSL Level 1, 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground during overvoltage event. |
| Anode | Reference / ground return path | Typically tied to system ground plane; completes clamping loop with minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA at VWM) across temperature and lifetime. |
| Low incremental surge resistance | Enables tight clamping (121 V at 12.4 A), minimizing voltage overshoot on protected ICs. |
| AEC-Q101 qualification | Validates reliability for automotive underhood environments (−40 °C to +125 °C ambient, 150 °C junction). |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns or baking requirements. |
| UL 94 V-0 molding compound | Meets flammability safety standards for enclosed automotive and industrial enclosures. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protects 12 V supply rail in engine control units against ISO 7637-2 Pulse 5a (load dump) transients up to 60 V peak for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input, clamping excess voltage before it reaches regulator ICs. Use Value: Limits voltage seen by downstream PMICs to ≤121 V during 1500 W surge, preventing latch-up or gate oxide damage in automotive-grade regulators. | Use Scenario: Shields LIN bus or analog sensor outputs (e.g., oxygen sensor, throttle position) from ESD and inductive kickback in body control modules. IC Role / Device Role / Timing Role: TVS connected between signal line and chassis ground, responding within <1 ns to suppress ±8 kV HBM ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with <1.0 µA leakage at 75 V, avoiding DC offset errors in precision 0–5 V analog sensor paths. |
| Industrial Motor Drive Gate Driver Protection | Telecom Power Supply Surge Clamp |
Use Scenario: Safeguards high-side N-channel MOSFET gate drivers in 24 V industrial motor controllers exposed to back-EMF spikes during PWM switching. IC Role / Device Role / Timing Role: Placed across driver output and ground to clamp negative-going transients induced by fast dV/dt switching. Use Value: Fast response time and low clamping voltage (121 V) prevent gate-source overvoltage that could exceed MOSFET VGS(max) ratings. | Use Scenario: Used in AC/DC front-end of telecom base station power supplies to absorb lightning-induced surges on -48 V DC distribution rails. IC Role / Device Role / Timing Role: TVS deployed in parallel with bulk capacitor to limit transient overvoltage during IEC 61000-4-5 combination wave (1.2/50 µs + 8/20 µs) tests. Use Value: 1500 W peak power rating allows single-device compliance with Level 4 (4 kV) surge immunity without cascaded clamping stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A-E3/57T | Same VWM (75 V), lower PPPM (400 W), SMA (DO-214AC) package, higher RθJA (110 °C/W). | Lower surge capacity limits use to consumer-grade or low-energy industrial signals, not automotive load dump. | Select when cost or board space is critical and surge energy is ≤400 W; verify thermal derating on smaller pads. |
| SMCJ75A-E3/9AT | Same VWM (75 V), identical PPPM (1500 W), but larger SMC (DO-214AB) package with higher IFSM (200 A vs. 12.4 A IPPM). | Better suited for high-current, low-frequency transients (e.g., 8.3 ms half-sine surges); less optimal for fast ESD due to higher junction capacitance. | Prefer for legacy designs using SMC footprint or where higher forward surge rating is required; verify PCB pad compatibility. |
Compared with SMCG75A-E3/9AT, SMAJ75A-E3/57T offers lower cost and smaller footprint but sacrifices 73% peak power handling and automotive qualification; SMCJ75A-E3/9AT matches power rating but requires larger board area and has slower response for ESD, making SMCG75A-E3/9AT the optimal balance of automotive reliability, compact DO-215AB form factor, and 1500 W surge capability.
Availability
SMCG75A-E3/9AT is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom power supplies, and sensor interface circuits requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMCG75A-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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMCG series targets high-energy transient suppression in space-constrained automotive and industrial applications, combining AEC-Q101 validation, low-profile DO-215AB packaging, and 1500 W pulse power in a gull-wing SMT format.
FAQ
What is the clamping voltage of SMCG75A-E3/9AT at its rated peak pulse current?
The SMCG75A-E3/9AT has a maximum clamping voltage (VC) of 121 V when subjected to its peak pulse current (IPPM) of 12.4 A under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG75A-E3/9AT maintains this clamping performance across its qualified operating temperature range.
Is SMCG75A-E3/9AT suitable for bidirectional transient suppression?
No, SMCG75A-E3/9AT is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" for bidirectional variants like SMCG75CA). Its cathode band marks the polarity-sensitive terminal, and it conducts only in reverse bias above VBR. For bidirectional protection, engineers must select the corresponding CA-part number; using SMCG75A-E3/9AT in AC or symmetrical transient scenarios would result in forward conduction and potential failure.
What does the "E3/9AT" suffix indicate in SMCG75A-E3/9AT?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "9AT" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This differs from "57T" (7-inch reel, 850 units) and confirms the part meets JESD201 Class 2 whisker resistance and J-STD-002 solderability standards. The SMCG75A-E3/9AT is not AEC-Q101 qualified - that requires the "HE3" or "HM3" suffix.
How does the thermal performance of SMCG75A-E3/9AT compare to similar TVS diodes in DO-214 packages?
SMCG75A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads - significantly lower than SMA (110 °C/W) and comparable to SMC (70–75 °C/W) packages. Its DO-215AB gull-wing geometry improves heat spreading versus gull-wing alternatives, allowing higher sustained power dissipation in compact layouts. This makes SMCG75A-E3/9AT more thermally efficient than SMAJ75A-E3/57T and better suited for automotive underhood applications than smaller-footprint equivalents.
Can SMCG75A-E3/9AT be used in place of SMCG75CA for protecting differential signal lines?
No - SMCG75A-E3/9AT is unidirectional and lacks symmetrical clamping behavior required for differential or AC-coupled signal lines. SMCG75CA provides matched breakdown in both directions (±83.3–92.1 V), essential for protecting RS-485, CAN, or LVDS pairs. Substituting SMCG75A-E3/9AT would expose one polarity to forward conduction and possible destruction. Always match device polarity to signal topology: use SMCG75A-E3/9AT for DC-biased rails and SMCG75CA-E3/9AT for bidirectional or AC signals.
SMCG75A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMCG75A-E3/9AT FAQ
1.How can I place an order for SMCG75A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG75A-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 SMCG75A-E3/9AT reliable?
The price and inventory of SMCG75A-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 SMCG75A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG75A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG75A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG75A-E3/9AT?
SMCG75A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG75A-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 SMCG75A-E3/9AT?
For technical support, including SMCG75A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG75A-E3/9AT requirements.
6.How does Aetrix verify that SMCG75A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG75A-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 SMCG75A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG75A-E3/9AT?
All SMCG75A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG75A-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 SMCG75A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG75A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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