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Vishay General Semiconductor - Diodes Division SMCG120CAHE3/57T
- Part No.:
- SMCG120CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG120CAHE3/57T.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,530
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Product details
Overview
SMCG120CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 µs), 133–147 V breakdown voltage (VBR), and 193 V maximum clamping voltage (VC) at rated surge current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, power rails, and I/O interfaces against ESD and load-dump transients.
For engineers reviewing the SMCG120CAHE3/57T datasheet, SMCG120CAHE3/57T pinout, SMCG120CAHE3/57T application, or SMCG120CAHE3/57T equivalent, key selection criteria include bidirectional clamping behavior, 120 V stand-off voltage (VWM), low incremental surge resistance, RoHS-compliant AEC-Q101 qualification, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during overvoltage events, leveraging an avalanche breakdown mechanism to divert surge current away from protected circuitry. Its bidirectional symmetry ensures identical clamping performance in both polarities, eliminating polarity-dependent design constraints.
Thermal performance is defined by RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = +150 °C. The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; sets upper limit for normal-mode signal or supply rail protection. |
| VBR (min/max) | 133 V / 147 V at 1 mA test current - Ensures consistent avalanche initiation across production lots; guarantees clamping begins no later than 147 V. |
| VC @ IPPM | 193 V at 7.8 A (10/1000 µs) - Defines worst-case voltage seen by downstream ICs during full-rated surge; critical for MOSFET gate or MCU I/O survivability. |
| PPPM | 1500 W - Peak transient energy handling capacity; supports ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 compliance when properly mounted. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without derating below ambient 125 °C. |
| AEC-Q101 | Qualified - Confirms reliability for automotive electronics per stress-test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: SMCG (DO-215AB) - Low-profile, gull-wing surface-mount package with 2 terminals; meets UL 94 V-0 flammability rating and MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | No polarity marking; symmetric conduction enables single-component protection of AC-coupled or floating lines without orientation concerns. |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Identical electrical role to Anode due to bidirectional construction; terminals are interchangeable in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for dual-device solutions on differential or AC signal paths. |
| AEC-Q101 qualification | Validated for automotive-grade reliability - supports deployment in ADAS sensors, body control modules, and infotainment without additional qualification effort. |
| Low incremental surge resistance | Enables tighter clamping margin - reduces overshoot during fast-rising transients (e.g., ISO 16750-2 load dump), improving system-level immunity. |
| Glass passivated junction | Enhances long-term stability and moisture resistance - maintains specified VBR and leakage performance after thermal cycling and humidity exposure. |
| Matte tin plating | Solderable per J-STD-002 and JESD22-B102 - ensures robust reflow joint formation and prevents intermetallic degradation in high-vibration environments. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver I/O pins and microcontroller ADC inputs in vehicle door modules against ESD and inductive switching noise. IC Role / Device Role / Timing Role: Voltage-clamping protector placed directly at connector interface to shunt transients before they reach sensitive analog front-ends. Use Value: Maintains signal integrity under ISO 10605 ±15 kV contact discharge while surviving repeated 12 V load-dump events per ISO 7637-2. |
Use Scenario: Safeguarding two-wire CAN FD physical layer transceivers in factory automation controllers exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CANH–CANL differential pair to clamp common-mode surges without distorting data eye. Use Value: Prevents bus lockup during 400 V/100 A ISO 16750-2 pulses while preserving <1 ns response time and <10 pF junction capacitance at 0 V bias. |
| Power Supply Input Protection | Consumer USB-C Port Protection |
|
Use Scenario: Front-end surge suppression for 12 V/24 V DC-DC converter inputs in telecom base station power supplies. IC Role / Device Role / Timing Role: Primary clamping device upstream of input filter capacitors and rectifier stages to absorb bulk surge energy. Use Value: Handles 1500 W peak pulse without degradation, reducing required MOV size and enabling smaller overall footprint versus discrete varistor+TVS stacks. |
Use Scenario: Overvoltage protection for USB-C CC and VBUS lines in portable docking stations subjected to hot-plug transients and charger misconnection. IC Role / Device Role / Timing Role: Bidirectional suppressor placed between connector and USB PD controller to clamp both positive and negative polarity faults. Use Value: Meets USB-IF ESD specification (±15 kV air, ±8 kV contact) while maintaining <1 µA leakage at 5 V to avoid battery drain in standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120CA | Same VWM (120 V) and PPPM (1500 W), but SMA (DO-214AC) package; higher RθJA (90 °C/W) and no AEC-Q101 qualification | Not suitable for under-hood automotive use; acceptable for industrial or consumer board-level protection where qualification is not mandated | Select SMAJ120CA only if cost sensitivity outweighs automotive reliability requirements and thermal budget allows higher junction temperature rise. |
| 1.5KE120CA | Through-hole DO-201 package; same VWM/VBR specs but lower surge rating (1500 W still applies); larger footprint and incompatible with SMT assembly | Used in legacy power supply designs or prototyping where manual assembly or high-power dissipation via heatsink is preferred | Choose 1.5KE120CA only when board space permits through-hole mounting and reflow compatibility is not required. |
Compared with SMAJ120CA and 1.5KE120CA, SMCG120CAHE3/57T delivers automotive-grade reliability in a compact SMT package with superior thermal resistance to lead (RθJL = 15 °C/W), enabling higher sustained surge duty cycles in space-constrained automotive modules.
Availability
SMCG120CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface hardening, and power supply input surge suppression requiring stable component supply across multi-year production programs.
Supply support for SMCG120CAHE3/57T 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, precision, and application-specific optimization.
The SMCG series was developed specifically for high-reliability automotive and industrial transient suppression, combining AEC-Q101 qualification, low-profile SMT packaging, and tightly controlled clamping parameters to replace legacy through-hole and less-qualified SMT alternatives.
FAQ
What does the "CA" suffix indicate in SMCG120CAHE3/57T?
The "CA" suffix denotes that SMCG120CAHE3/57T is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping in both polarities. This eliminates polarity marking on the device and simplifies layout for differential or AC-coupled signal lines, unlike unidirectional variants (e.g., SMCG120A) which require cathode orientation alignment.
Is SMCG120CAHE3/57T suitable for automotive under-hood applications?
Yes, SMCG120CAHE3/57T is AEC-Q101 qualified and rated for TJ = –55 °C to +150 °C, making it suitable for under-hood automotive applications such as engine control units, transmission modules, and ADAS sensor interfaces where high ambient temperatures and mechanical vibration are present.
What is the recommended PCB pad layout for optimal thermal and surge performance of SMCG120CAHE3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG120CAHE3/57T to achieve rated 1500 W peak pulse power. Using this layout ensures proper heat dissipation and minimizes trace inductance, directly supporting the device's 7.8 A IPPM rating and low clamping voltage performance.
How does the HE3 suffix affect the specifications of SMCG120CAHE3/57T?
HE3 indicates RoHS-compliant construction with AEC-Q101 qualification. It confirms that SMCG120CAHE3/57T meets automotive reliability standards and contains no restricted substances per EU Directive 2011/65/EU, distinguishing it from industrial-grade E3 variants and halogen-free HM3 versions.
Can SMCG120CAHE3/57T be used in place of a unidirectional TVS like SMCG120A?
No - SMCG120CAHE3/57T is bidirectional and lacks polarity marking, whereas SMCG120A is unidirectional with a cathode band. Substituting them requires verifying circuit topology: SMCG120CAHE3/57T works for AC or floating lines, but SMCG120A is required for DC-biased rails where forward conduction must be blocked in one direction.
SMCG120CAHE3/57T 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCG120CAHE3/57T FAQ
1.How can I place an order for SMCG120CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG120CAHE3/57T 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 SMCG120CAHE3/57T reliable?
The price and inventory of SMCG120CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG120CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG120CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG120CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG120CAHE3/57T?
SMCG120CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG120CAHE3/57T 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 SMCG120CAHE3/57T?
For technical support, including SMCG120CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG120CAHE3/57T requirements.
6.How does Aetrix verify that SMCG120CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG120CAHE3/57T 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 SMCG120CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG120CAHE3/57T?
All SMCG120CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG120CAHE3/57T, 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 SMCG120CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG120CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG120CAHE3/57T Tags
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