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Vishay General Semiconductor - Diodes Division SMCG45-E3/9AT
- Part No.:
- SMCG45-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG45-E3/9AT.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
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Product details
Overview
SMCG45-E3/9AT from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in DO-215AB (SMCG) package, rated for 45 V stand-off voltage, 1500 W peak pulse power, and clamping at 72.7 V under 20.6 A surge current. It provides robust ESD and lightning surge protection for automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCG45-E3/9AT datasheet, SMCG45-E3/9AT pinout, SMCG45-E3/9AT application, or SMCG45-E3/9AT equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance data, clamping behavior under 10/1000 µs transients, and direct alternatives with documented parameter differences.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage VBR = 50.0–55.3 V at 1.0 mA test current and maximum reverse leakage ID ≤ 1.0 µA at 45 V stand-off. Its low incremental surge resistance enables tight clamping during fast transients.
Designed for automotive-grade reliability, SMCG45-E3/9AT meets AEC-Q101, is RoHS-compliant (E3 suffix), qualified to MSL level 1 (260 °C reflow), and features glass-passivated junctions with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins |
| VC @ IPPM | 72.7 V - Clamped voltage at 20.6 A peak pulse current (10/1000 µs waveform) |
| PPPM | 1500 W - Peak pulse power handling capability under standardized transient stress |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient on 8.0 mm × 8.0 mm copper pads |
| TJ max | 150 °C - Maximum allowable junction temperature for reliable long-term operation |
| ID @ VWM | ≤1.0 µA - Low leakage ensures minimal power loss and signal integrity in high-impedance circuits |
| MSL Level | Level 1 - Supports standard SMT reflow without dry-pack or baking requirements |
Pinout & Package
DO-215AB (SMCG) surface-mount package: gull-wing lead configuration, 0.310" × 0.400" footprint (7.87 mm × 10.16 mm), no polarity marking for bi-directional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No polarity designation - terminals interchangeable; conducts clamp current in either direction when VIN exceeds ±VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including engine control, ADAS sensors, and infotainment I/O protection |
| Glass passivated junction | Enhances long-term stability and moisture resistance in harsh environments (e.g., under-hood, industrial enclosures) |
| Low Rsurge and fast response | Enables sub-nanosecond turn-on and limits voltage overshoot during ESD (IEC 61000-4-2) and lightning surges (IEC 61000-4-5) |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed consumer, telecom, and industrial equipment |
| Matte tin plating, JESD 201 Class 1A | Ensures reliable solder joint formation and suppresses tin whisker growth in high-reliability applications |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential signal pair or supply rail to divert surge energy to ground. Use Value: Maintains signal integrity by limiting transient overvoltage to ≤72.7 V while surviving 1500 W pulses - critical for AEC-Q100 Grade 2 compliance. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff device mounted between input terminal and ground, conducting only during overvoltage events >±45 V. Use Value: Enables compact PCB layout with DO-215AB footprint and eliminates need for external series impedance due to low leakage (<1 µA). |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485/RS-422 transceiver pins in base station backhaul units from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary protection element placed before TVS array or GDT secondary stage, absorbing initial 10/1000 µs energy. Use Value: Delivers 1500 W pulse rating with 72.7 V clamping - sufficient to meet ITU-T K.20/21 immunity requirements without derating. |
Use Scenario: Securing microcontroller GPIOs and display backlight drivers in smart home appliances exposed to user-accessible ports and internal motor switching noise. IC Role / Device Role / Timing Role: Localized transient suppression at connector entry points and motor driver outputs to prevent latch-up or gate oxide damage. Use Value: RoHS-compliant E3 suffix and MSL Level 1 enable direct integration into high-volume automated assembly without process modifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/57T | Uni-directional; VWM = 45 V, VC = 73.0 V @ 19.9 A, PPPM = 400 W, SMA package | Limited to single-polarity circuits; lower power rating requires parallel placement for equivalent energy handling | Select when cost-sensitive, space-constrained designs tolerate uni-directional limitation and reduced surge margin |
| SMCJ45CA-E3/9AT | Bi-directional; VWM = 45 V, VC = 73.0 V @ 20.5 A, PPPM = 1500 W, DO-214AB (SMC) package | Same electrical performance but larger 7.11 mm × 6.22 mm footprint; higher RθJA (50 °C/W vs. 75 °C/W) | Choose when existing board layout uses SMC footprint or thermal management favors larger pad area |
Compared with SMAJ45A-E3/57T and SMCJ45CA-E3/9AT, SMCG45-E3/9AT offers identical 45 V standoff and 1500 W rating in a smaller DO-215AB footprint (7.87 mm × 10.16 mm), enabling higher board density while maintaining AEC-Q101 qualification and MSL Level 1 compatibility.
Availability
SMCG45-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG45-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 targets high-energy transient suppression in space-constrained, high-reliability applications - engineered specifically for AEC-Q101 compliance, low-profile SMT assembly, and robust clamping performance across automotive and industrial environments.
FAQ
What is the clamping voltage of SMCG45-E3/9AT under maximum surge conditions?
The SMCG45-E3/9AT clamps to 72.7 V at its rated peak pulse current of 20.6 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 14-Mar-12, ensuring predictable overvoltage limiting for downstream ICs.
Is SMCG45-E3/9AT suitable for automotive applications?
Yes, SMCG45-E3/9AT is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade product documentation. Its glass-passivated junction, MSL Level 1 rating, and operation from –55 °C to +150 °C make it appropriate for engine control units, ADAS sensors, and body electronics where transient immunity is critical.
Does SMCG45-E3/9AT have polarity markings on the package?
No, SMCG45-E3/9AT is a bi-directional TVS and carries no polarity marking. The DO-215AB package has symmetrical terminals - either lead may serve as anode or cathode depending on transient polarity, simplifying PCB layout and eliminating orientation errors during automated placement.
What is the thermal resistance of SMCG45-E3/9AT under standard mounting conditions?
SMCG45-E3/9AT 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. This value assumes standard JEDEC test conditions and guides thermal design for sustained power dissipation up to 6.5 W at TA = 50 °C.
How does the E3 suffix affect SMCG45-E3/9AT's compliance and reliability?
The E3 suffix indicates RoHS-compliant construction and JESD 201 Class 1A whisker resistance. For SMCG45-E3/9AT, this means matte tin-plated leads suitable for lead-free reflow, no hazardous substances per EU Directive 2011/65/EU, and validated resistance to tin whisker growth - essential for long-life automotive and industrial deployments.
SMCG45-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 18.7A
- 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)
SMCG45-E3/9AT FAQ
1.How can I place an order for SMCG45-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG45-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 SMCG45-E3/9AT reliable?
The price and inventory of SMCG45-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 SMCG45-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG45-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG45-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG45-E3/9AT?
SMCG45-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG45-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 SMCG45-E3/9AT?
For technical support, including SMCG45-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG45-E3/9AT requirements.
6.How does Aetrix verify that SMCG45-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG45-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 SMCG45-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG45-E3/9AT?
All SMCG45-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG45-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 SMCG45-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG45-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG45-E3/9AT Tags
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