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Vishay General Semiconductor - Diodes Division SMCG120AHE3/9AT
- Part No.:
- SMCG120AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG120AHE3/9AT.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,360
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Product details
Overview
SMCG120AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection with 120 V standoff voltage (VWM), 133–147 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 µs. It features AEC-Q101 qualification, low incremental surge resistance, and clamps transients to ≤193 V at 7.8 A IPPM - deployed on automotive power rails and industrial sensor interfaces.
For engineers reviewing the SMCG120AHE3/9AT datasheet, SMCG120AHE3/9AT pinout, SMCG120AHE3/9AT application, or SMCG120AHE3/9AT equivalent, this page delivers verified electrical specs, mechanical package data, real-world use cases, and validated alternative parts - all aligned to Vishay's 88457 document revision (09-Jan-2024) and DO-215AB terminal configuration.
Technical Context
This TVS operates as a clamping device in parallel with protected circuitry, responding within picoseconds to voltage spikes exceeding its VWM of 120 V. Its glass-passivated junction ensures stable breakdown behavior under repetitive surges, while the unidirectional polarity enables integration into DC-biased lines without reverse conduction concerns.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = +150 °C. The device meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing - confirming suitability for automated SMT assembly and high-reliability automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous reverse operating voltage before clamping initiates; sets protection threshold for 12 V–48 V automotive systems. |
| VBR (min/max) | 133 V / 147 V at IT = 1 mA - tight 10.5% tolerance ensures predictable turn-on across temperature and production lots. |
| VC @ IPPM | 193 V at 7.8 A - clamping voltage during 10/1000 µs surge defines worst-case overvoltage seen by downstream ICs. |
| PPPM | 1500 W - peak power handling capability determines survivability against ISO 7637-2 Pulse 1/2/5a surges. |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - junction temperature rating enables under-hood deployment without derating in engine control units. |
| Package | SMCG (DO-215AB) - surface-mount gull-wing outline with 0.220–0.245" body length, optimized for thermal dissipation on 8 mm × 8 mm copper pads. |
Pinout & Package
SMCG120AHE3/9AT uses the SMCG (DO-215AB) package: a gull-wing, dual-terminal surface-mount outline with cathode band marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102, and rated for 260 °C peak reflow per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in unidirectional configuration | Connected to system ground or low-impedance return path; reverse-biased during normal operation. |
| Anode | Line-side connection point | Placed directly across protected line (e.g., CAN_H, LIN, 12 V rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, body electronics, and ADAS modules per stress test requirements. |
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage under humidity, temperature cycling, and high-voltage bias conditions. |
| Low incremental surge resistance | Minimizes VC rise during fast transients, improving protection margin for sensitive 3.3 V/5 V microcontrollers and transceivers. |
| MSL Level 1, 260 °C peak | Enables single-pass reflow without moisture-related popcorning, eliminating pre-bake steps in high-volume SMT lines. |
| RoHS compliant, HE3 suffix | Meets EU RoHS Directive 2011/65/EU and supports automotive OEM compliance reporting with full material declaration. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping transients faster than fuse response time. Use Value: Limits voltage to ≤193 V during ISO 7637-2 Pulse 5a (100 V, 400 ms), preventing damage to PMICs and MCU power supplies. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) in factory automation sensors from ESD and switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on signal line to shunt induced surges before reaching op-amp input stage. Use Value: 1.0 µA ID at 120 V VWM avoids loading precision current sources; 1500 W PPPM handles relay-coil kickback events. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection on AC/DC converter inputs in telecom base station power modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device upstream of bridge rectifier, absorbing energy before it reaches bulk capacitors. Use Value: 193 V VC ensures downstream components see <200 V peak, meeting IEC 61000-4-5 Level 4 (4 kV) immunity requirements. |
Use Scenario: Overvoltage suppression on primary-side DC bus of USB-C PD adapters after rectification but before PFC controller. IC Role / Device Role / Timing Role: Standoff-rated TVS that remains non-conductive during normal 120–375 V DC operation but activates on MOV failure or line surge. Use Value: 120 V VWM provides safe margin above 100 V RMS input (141 V peak), while 1500 W rating covers sustained overvoltage events. |
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), lower PPPM (400 W), SMA (DO-214AC) package with higher RθJA (100 °C/W). | Limited to lower-energy surges (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a. | Select when cost or board space is critical and surge energy is <400 W; verify thermal layout for 150 °C operation. |
| SMCJ120AHE3/9AT | Identical VWM (120 V), same SMCG package, but rated for 1500 W PPPM and AEC-Q101 - differs only in JEDEC prefix (SMCJ vs SMCG) and minor process refinement. | Functionally interchangeable in all documented applications; identical pinout, thermal profile, and clamping behavior. | Preferred for new designs requiring latest Vishay process consistency; legacy SMCG120AHE3/9AT remains fully supported. |
Compared with SMAJ120A-E3/57T, SMCG120AHE3/9AT delivers 275% higher surge power handling and superior thermal resistance, enabling robust protection in automotive and industrial settings; versus SMCJ120AHE3/9AT, it shares identical electrical and mechanical specs - differing only in manufacturing lot traceability and internal process version.
Availability
SMCG120AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and telecom power supply surge protection requiring stable component supply, AEC-Q101 compliance, and 13" tape-and-reel logistics.
Supply support for SMCG120AHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCG series targets high-energy transient suppression in harsh environments - engineered specifically for AEC-Q101 compliance, low-clamping-voltage performance, and compatibility with automated SMT assembly in safety-critical systems.
FAQ
What is the clamping voltage of SMCG120AHE3/9AT at its rated peak pulse current?
The SMCG120AHE3/9AT clamps to a maximum of 193 V at its specified peak pulse current (IPPM) of 7.8 A under a 10/1000 µs waveform. This value is measured per Figure 3 in Vishay document 88457 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMCG120AHE3/9AT suitable for bidirectional signal line protection?
No - SMCG120AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection (e.g., RS-485, CAN bus), Vishay specifies the "CA" variant (e.g., SMCG120CA). Using SMCG120AHE3/9AT on AC-coupled or floating lines risks forward conduction and improper clamping behavior.
Does SMCG120AHE3/9AT require a heatsink for 6.5 W continuous power dissipation?
No - the 6.5 W rating (PD) applies only with infinite heatsink conditions at TA = 50 °C. In typical PCB layouts using the recommended 8.0 mm × 8.0 mm copper pads per terminal, SMCG120AHE3/9AT relies on board-level thermal conduction. Its RθJA of 75 °C/W means 6.5 W would raise junction temperature by 488 °C above ambient - far exceeding its 150 °C limit; thus, PD is not intended for continuous operation.
What does the "HE3" suffix signify in SMCG120AHE3/9AT?
The "HE3" suffix in SMCG120AHE3/9AT indicates RoHS-compliant construction with AEC-Q101 qualification (per Vishay's mechanical data table). "H" denotes AEC-Q101, "E3" confirms RoHS compliance and industrial-grade reliability - distinguishing it from "E3"-only (non-AEC) or "HM3" (halogen-free + AEC-Q101) variants.
Can SMCG120AHE3/9AT be used in place of SMCG120A-E3/9AT?
Yes - SMCG120AHE3/9AT is the AEC-Q101-qualified version of SMCG120A-E3/9AT. Both share identical electrical specifications (VWM, VBR, PPPM, VC), package (SMCG), and pinout. The "H" in HE3 adds automotive qualification; no design changes or layout modifications are required when upgrading from E3 to HE3 for enhanced reliability assurance.
SMCG120AHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG120AHE3/9AT FAQ
1.How can I place an order for SMCG120AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG120AHE3/9AT 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 SMCG120AHE3/9AT reliable?
The price and inventory of SMCG120AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG120AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG120AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG120AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG120AHE3/9AT?
SMCG120AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG120AHE3/9AT 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 SMCG120AHE3/9AT?
For technical support, including SMCG120AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG120AHE3/9AT requirements.
6.How does Aetrix verify that SMCG120AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG120AHE3/9AT 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 SMCG120AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG120AHE3/9AT?
All SMCG120AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG120AHE3/9AT, 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 SMCG120AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG120AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG120AHE3/9AT Tags
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