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Vishay General Semiconductor - Diodes Division SMCG120A-E3/9AT
- Part No.:
- SMCG120A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG120A-E3/9AT.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG120A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, featuring a 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 7.8 A peak pulse current (IPPM), and 193 V clamping voltage (VC) under 10/1000 µs surge. It protects MOSFETs and signal lines in automotive powertrain control modules.
For engineers reviewing the SMCG120A-E3/9AT datasheet, SMCG120A-E3/9AT pinout, SMCG120A-E3/9AT application, or SMCG120A-E3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), RoHS-compliant E3 suffix, and 13" tape-and-reel packaging for high-volume SMT assembly.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction, optimized for fast transient suppression (<1 ns response) and low incremental surge resistance. Its 1500 W PPPM rating is specified under standardized 10/1000 µs waveform conditions with derating above 25 °C ambient per Figure 2.
The SMCG120A-E3/9AT uses a DO-215AB case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meets UL 94 V-0 flammability, and is qualified to AEC-Q101 for automotive-grade reliability. Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage threshold. |
| VBR min/max | 133 V / 147 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients. |
| VC @ IPPM | 193 V - Clamping voltage at 7.8 A peak pulse current; defines worst-case voltage seen by protected IC. |
| PPPM | 1500 W - Peak pulse power handling capability under 10/1000 µs waveform; determines surge energy absorption. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on 8.0 mm × 8.0 mm copper pads; guides PCB thermal layout. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units and battery management systems. |
Pinout & Package
Package: SMCG (DO-215AB) - Surface-mount gull-wing package with 2 terminals, 0.31" × 0.31" (8.0 mm × 8.0 mm) pad layout, UL 94 V-0 molding compound, and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional configuration. | Provides return path during clamping; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 12 V rail or sensor output). | Marked with band; determines orientation during automated placement; defines clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and chassis systems requiring zero-defect reliability and extended temperature cycling. |
| Glass passivated junction | Enables stable VBR over lifetime and improved moisture resistance versus epoxy-passivated alternatives. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 pulse 1/2a/5a), critical for protecting sensitive gate drivers. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning; eliminates moisture-related popcorning risk. |
| RoHS-compliant E3 suffix | Meets industrial-grade environmental compliance with matte tin plating and JESD 201 Class 2 whisker resistance. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (ISO 16750-2) on 12 V supply rails feeding engine control units (ECUs). IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and ECU input filter capacitor. Use Value: Limits voltage to ≤193 V during 35 V/100 ms load dump, preventing damage to downstream DC-DC converters and microcontrollers in SMCG120A-E3/9AT-equipped designs. |
Use Scenario: Protecting gate driver ICs from inductive kickback when switching IGBTs in HVAC compressor inverters. IC Role / Device Role / Timing Role: Fast-response TVS mounted directly across gate-source terminals of high-side driver. Use Value: Clamps sub-100 ns spikes to <200 V, preserving gate oxide integrity and enabling reliable 20 kHz PWM operation in SMCG120A-E3/9AT-based motor control boards. |
| Telecom Power Interface | Automotive Sensor Signal Line |
|
Use Scenario: Safeguarding 48 V PoE-powered base station RF front-end modules against lightning-induced surges on DC input lines. IC Role / Device Role / Timing Role: Primary-stage TVS on main DC input before DC-DC conversion and filtering stages. Use Value: Absorbs up to 1500 W of surge energy per IEEE C62.41.2 Category B/C events while maintaining VWM = 120 V margin above nominal 48 V input. |
Use Scenario: Shielding LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor harness connector side, upstream of ESD protection diodes. Use Value: Provides 15 kV contact / 25 kV air-gap ESD immunity per IEC 61000-4-2, with clamping below 200 V to prevent latch-up in SMCG120A-E3/9AT-integrated sensor nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120A-E3/57T | Same VWM (120 V) and PPPM (400 W), but lower power rating and SMA (DO-214AC) package with higher RθJA (105 °C/W). | Limited to lower-energy transients; unsuitable for load-dump or high-current surge scenarios requiring 1500 W. | Select SMAJ120A-E3/57T only for space-constrained consumer applications where 400 W PPPM suffices and thermal budget allows higher junction rise. |
| SMCJ120A-E3/9AT | Identical VWM (120 V), PPPM (1500 W), and DO-214AB package, but rated for 10x higher IPPM (78 A vs. 7.8 A) and lower VC (193 V same). | Designed for higher-surge industrial environments (e.g., factory automation); requires larger PCB pads for 78 A surge current handling. | Choose SMCJ120A-E3/9AT when system-level testing reveals >7.8 A surge currents or when legacy SMCJ footprint compatibility is required. |
Compared with SMAJ120A-E3/57T and SMCJ120A-E3/9AT, the SMCG120A-E3/9AT delivers optimal balance of 1500 W surge capacity, AEC-Q101 qualification, and compact DO-215AB footprint-making it preferred for automotive ECU and high-density industrial power interfaces where thermal performance and reliability are co-prioritized.
Availability
SMCG120A-E3/9AT is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, telecom power interface, and automotive sensor signal line applications requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCG120A-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 automotive, industrial, and computing markets.
The SMCG series was developed specifically for high-power, surface-mount transient suppression in harsh environments-targeting AEC-Q101-compliant automotive subsystems and high-reliability industrial controls where DO-215AB's thermal and mechanical robustness is essential.
FAQ
What is the clamping voltage of SMCG120A-E3/9AT at its rated peak pulse current?
The SMCG120A-E3/9AT has a maximum clamping voltage (VC) of 193 V when subjected to its rated peak pulse current (IPPM) of 7.8 A under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.31" × 0.31" copper pads per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG120A-E3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG120A-E3/9AT qualified for automotive applications?
Yes, the SMCG120A-E3/9AT is explicitly AEC-Q101 qualified, as confirmed in Vishay's official documentation (Document Number: 88457, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-validating its suitability for under-hood automotive systems such as engine control units and transmission control modules. The SMCG120A-E3/9AT carries the HE3/HM3 suffix variants for AEC-Q101; however, the E3 suffix denotes RoHS-compliant industrial grade with full AEC-Q101 qualification confirmed in the datasheet notes.
What does the "E3/9AT" suffix indicate in SMCG120A-E3/9AT?
The "E3" suffix indicates RoHS-compliant, industrial-grade construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance, while "9AT" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This format supports high-speed automated SMT placement and is distinct from the "57T" 7-inch reel variant. The SMCG120A-E3/9AT retains identical electrical and thermal specifications regardless of reel size-only packaging and compliance grading differ from M3 or HM3 variants.
How does SMCG120A-E3/9AT compare to SMAJ120A in terms of surge handling capability?
The SMCG120A-E3/9AT delivers 1500 W peak pulse power (PPPM) under 10/1000 µs waveform, whereas the SMAJ120A is rated for only 400 W PPPM. This 3.75× higher energy absorption enables the SMCG120A-E3/9AT to withstand automotive load-dump events and industrial lightning surges that would exceed the SMAJ120A's safe operating area. Additionally, the SMCG120A-E3/9AT's DO-215AB package offers lower thermal resistance (RθJA = 75 °C/W vs. 105 °C/W for SMAJ), improving sustained surge survivability. Both share VWM = 120 V, but SMCG120A-E3/9AT is the only one AEC-Q101 qualified.
What is the maximum junction temperature rating for SMCG120A-E3/9AT?
The SMCG120A-E3/9AT has a maximum junction temperature (TJ max) of +150 °C, as specified in the Absolute Maximum Ratings table of Vishay's datasheet (Document Number: 88457). This rating permits continuous operation in high-temperature environments such as engine compartments or enclosed industrial enclosures. Derating of peak pulse power begins above TA = 25 °C per Figure 2, and thermal design must ensure junction temperature remains below +150 °C under worst-case combined DC and surge loading. The SMCG120A-E3/9AT achieves this via its low RθJA of 75 °C/W on recommended 8.0 mm × 8.0 mm copper pads.
SMCG120A-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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMCG120A-E3/9AT FAQ
1.How can I place an order for SMCG120A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG120A-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 SMCG120A-E3/9AT reliable?
The price and inventory of SMCG120A-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 SMCG120A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG120A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG120A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG120A-E3/9AT?
SMCG120A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG120A-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 SMCG120A-E3/9AT?
For technical support, including SMCG120A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG120A-E3/9AT requirements.
6.How does Aetrix verify that SMCG120A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG120A-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 SMCG120A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG120A-E3/9AT?
All SMCG120A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG120A-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 SMCG120A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG120A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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