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Vishay General Semiconductor - Diodes Division SMCG75-E3/9AT
- Part No.:
- SMCG75-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG75-E3/9AT.pdf
- Description:
- TVS DIODE 75VWM 134VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,575
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Product details
Overview
SMCG75-E3/9AT from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in the DO-215AB (SMCG) package, designed for clamping voltage transients on signal or power lines. It features a 75 V stand-off voltage (VWM), 121 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCG75-E3/9AT datasheet, SMCG75-E3/9AT pinout, SMCG75-E3/9AT application, or SMCG75-E3/9AT equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both polarities, with no polarity marking on the device body - confirming its bi-directional design per the CA-suffix convention. Its glass-passivated junction ensures stable breakdown behavior, while low incremental surge resistance enables effective energy diversion during transient events such as inductive load switching or ESD.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead). It meets UL 94 V-0 flammability requirements and is RoHS-compliant under JESD 201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse operating voltage before clamping begins |
| VC @ IPPM | 121 V at 12.4 A - clamping voltage under 10/1000 µs surge, defining worst-case voltage seen by protected circuit |
| PPPM | 1500 W - peak transient power it can absorb without failure, critical for lightning/surge immunity |
| ID @ VWM | 1.0 µA - leakage current at stand-off voltage, ensuring minimal loading on high-impedance signal lines |
| TJ max. | +150 °C - maximum junction temperature, supporting under-hood automotive and industrial environments |
| MSL Level | Level 1 per J-STD-020 - allows unlimited floor life and reflow up to 260 °C peak, simplifying manufacturing |
| AEC-Q101 | Qualified - validated for automotive electronics reliability including temperature cycling and HTRB |
Pinout & Package
Package: DO-215AB (SMCG), surface-mount gull-wing lead configuration, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Bi-directional construction means no cathode band marking; terminals are symmetrical and non-polarized.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically - bidirectional clamping occurs regardless of voltage polarity applied |
| Case (body) | Non-electrical mechanical interface | DO-215AB molded compound provides UL 94 V-0 flame resistance and mechanical robustness |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| Glass-passivated junction | Ensures consistent VBR tolerance (83.3–92.1 V) and long-term stability under thermal cycling |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units and ADAS sensor interfaces |
| Low-profile gull-wing leads | Supports automated pick-and-place and reflow soldering on dense PCB layouts with 0.51 mm lead thickness |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when mounted per recommended pad layout |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector entry point or IC pin to limit transient overvoltage. Use Value: Prevents latch-up or permanent damage to 5 V or 12 V sensor front-ends while maintaining signal integrity below 121 V clamp level. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced transients from relay coils or motor drives. IC Role / Device Role / Timing Role: Primary transient suppressor on 24 V DC input lines, positioned before optocoupler or Schmitt trigger input stage. Use Value: Absorbs 1500 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards. |
| Telecom Line Interface | Consumer Device USB/UART Lines |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-line bi-directional TVS on differential pair, placed adjacent to connector to minimize inductance. Use Value: Clamps common-mode transients to ≤121 V within nanoseconds, preserving data integrity across multi-kilometer links. | Use Scenario: Adding ESD and surge resilience to USB 2.0 D+/D– or UART TX/RX lines in smart home hubs and portable diagnostics tools. IC Role / Device Role / Timing Role: Localized transient suppression at board edge, complementing internal IC ESD structures. Use Value: Withstands ±15 kV contact discharge (IEC 61000-4-2) and limits clamped voltage to safe levels for 3.3 V logic interfaces. |
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 | Uni-directional; 75 V VWM, 121 V VC, but only rated for 400 W PPPM | Requires external polarity management; unsuitable for AC or floating differential lines | Select only if unidirectional protection suffices and lower surge rating is acceptable |
| SMCJ75CA | Same bi-directional functionality and 1500 W rating, but in larger DO-214AB (SMC) package (7.11 mm × 6.22 mm vs. SMCG's 7.87 mm × 3.17 mm) | Higher thermal mass but incompatible with space-constrained layouts requiring DO-215AB footprint | Choose when board area permits larger package and higher thermal margin is prioritized |
Compared with SMAJ75A-E3/57T and SMCJ75CA, the SMCG75-E3/9AT delivers identical 75 V bi-directional clamping and 1500 W surge capability in a 30 % smaller footprint than SMC, while avoiding polarity constraints of uni-directional alternatives - making it optimal for compact, automotive-grade signal line protection.
Availability
SMCG75-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer USB/UART protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCG75-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, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, surface-mount transient suppression in space-constrained and mission-critical environments.
FAQ
What does the "CA" suffix mean in SMCG75-E3/9AT?
The "CA" suffix in SMCG75-E3/9AT explicitly denotes a bi-directional configuration - confirmed by the absence of cathode band marking and symmetrical electrical characteristics in both polarities. This distinguishes it from uni-directional variants (e.g., SMCG75A), which carry a cathode band and conduct only in reverse bias. The SMCG75-E3/9AT datasheet specifies identical VBR, VC, and IPPM values for positive and negative excursions, validating its true bi-directional operation.
Is SMCG75-E3/9AT qualified for automotive use?
Yes, SMCG75-E3/9AT is AEC-Q101 qualified - verified through stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST). This qualification applies to the HE3 variant; however, the E3 suffix indicates commercial-grade construction. While the SMCG75-E3/9AT shares the same die and DO-215AB package as the HE3 version, its qualification status is derived from the family-level AEC-Q101 certification documented in Vishay's 88457 datasheet revision 14-Mar-12.
What is the recommended PCB pad layout for SMCG75-E3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG75-E3/9AT to achieve rated 1500 W peak pulse power. Smaller pads reduce thermal dissipation and derate IPPM significantly - e.g., halving pad area may reduce surge current handling by ~30 %. The SMCG75-E3/9AT must be placed with gull-wing leads fully soldered to these pads, avoiding solder mask defined (SMD) footprints that restrict copper exposure.
How does SMCG75-E3/9AT compare to SMAJ75A in surge handling?
SMCG75-E3/9AT delivers 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform, whereas SMAJ75A is rated for only 400 W under identical conditions. This 275 % higher energy absorption capacity allows SMCG75-E3/9AT to survive harsher transients like ISO 7637-2 Pulse 5a (load dump) without degradation. Additionally, SMCG75-E3/9AT's bi-directional nature eliminates polarity dependency, unlike the uni-directional SMAJ75A, which requires correct orientation relative to system ground.
Does SMCG75-E3/9AT require derating above 25 °C ambient?
Yes, SMCG75-E3/9AT must be derated above TA = 25 °C per Figure 2 in the Vishay 88457 datasheet: its peak pulse power decreases linearly to ~75 % at 75 °C and ~50 % at 100 °C ambient. This derating stems from junction-to-ambient thermal resistance (RθJA = 75 °C/W); sustained high-temperature operation reduces surge margin. For designs operating above 70 °C, thermal simulation or empirical testing with SMCG75-E3/9AT under actual board conditions is required to confirm margin.
SMCG75-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 11.2A
- 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)
SMCG75-E3/9AT FAQ
1.How can I place an order for SMCG75-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG75-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 SMCG75-E3/9AT reliable?
The price and inventory of SMCG75-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 SMCG75-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG75-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG75-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG75-E3/9AT?
SMCG75-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG75-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 SMCG75-E3/9AT?
For technical support, including SMCG75-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG75-E3/9AT requirements.
6.How does Aetrix verify that SMCG75-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG75-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 SMCG75-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG75-E3/9AT?
All SMCG75-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG75-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 SMCG75-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG75-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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