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Vishay General Semiconductor - Diodes Division SMCG120CA-E3/57T
- Part No.:
- SMCG120CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG120CA-E3/57T.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,151
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Product details
Overview
SMCG120CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for high-energy surge protection on signal and power lines. It features a 120 V standoff voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 193 V at 7.8 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG120CA-E3/57T datasheet, SMCG120CA-E3/57T pinout, SMCG120CA-E3/57T application, or SMCG120CA-E3/57T equivalent, this device is selected for robust overvoltage protection in automotive sensor interfaces, industrial I/O ports, and telecom line drivers where fast response (<1 ns), low clamping ratio, and MSL Level 1 solderability are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified as 133–147 V at 1 mA test current and clamps transients to ≤193 V under 10/1000 µs waveform conditions. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repeated surge stress.
Thermal design is supported by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal. The device meets J-STD-020 MSL Level 1 and withstands peak reflow temperatures up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 133 V / 147 V at 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 193 V at 7.8 A - Clamped voltage under standardized 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients such as ISO 7637-2 Pulse 5a/b or IEC 61000-4-5 Level 4. |
| ID @ VWM | 1.0 µA - Reverse leakage current at rated standoff voltage; ensures minimal power loss and signal integrity in standby operation. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing package with matte tin-plated leads; compatible with automated SMT assembly and J-STD-002 soldering standards. |
Pinout & Package
SMCG120CA-E3/57T uses the SMCG (DO-215AB) surface-mount package with two terminals in a symmetrical gull-wing configuration. As a bidirectional device, it has no polarity marking; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient Current Path (Anode/Cathode) | Either terminal serves as conduction path during positive or negative voltage excursions; bidirectional symmetry eliminates orientation constraints during placement. |
| Terminal 2 | Transient Current Path (Anode/Cathode) | Electrically identical to Terminal 1; completes low-impedance surge shunt path to ground or rail when V > |VBR| in either direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power rails requiring zero defect reliability. |
| MSL Level 1 rating | Allows unlimited floor life and compatibility with standard lead-free reflow profiles up to 260 °C peak without preconditioning. |
| Glass passivated junction | Provides stable electrical characteristics over temperature and lifetime, minimizing parameter drift under thermal cycling and humidity exposure. |
| Low incremental surge resistance | Enables tighter clamping voltage margin versus competing TVS devices, reducing stress on protected ICs like CAN transceivers or ADC front-ends. |
| UL 94 V-0 molding compound | Ensures flame-retardant housing suitable for enclosed industrial and transportation equipment meeting safety certification requirements. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to divert transients before reaching MCU or transceiver input stages. Use Value: Maintains signal integrity during ISO 16750-2 load dump tests while supporting AEC-Q100 Grade 2 ambient temperature range (−40 °C to +105 °C). |
Use Scenario: Safeguarding digital and analog input/output channels of programmable logic controllers against induced surges from relay switching and motor drives. IC Role / Device Role / Timing Role: Parallel-connected TVS at field-side connector interface to limit transient voltages to levels compatible with 24 V DC-rated optocouplers and level shifters. Use Value: Withstands repetitive 1 kV/500 A surges per IEC 61000-4-5, extending mean time between failures in factory automation systems. |
| Telecom Line Driver Protection | Power Supply Rail Clamp |
|
Use Scenario: Shielding RS-485/RS-232 transceivers and Ethernet PHYs from lightning-induced surges on outdoor communication lines. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed differential-mode across data pair, referenced to local ground plane. Use Value: Delivers <1 ns response time and <193 V clamping at 7.8 A, preserving signal edge fidelity while meeting Telcordia GR-1089-CORE Level 3 immunity requirements. |
Use Scenario: Secondary overvoltage protection on 12 V or 24 V DC power distribution networks feeding sensitive subsystems. IC Role / Device Role / Timing Role: Shunt element connected between supply rail and ground to clamp voltage spikes exceeding VWM during hot-swap or inductive kick events. Use Value: Handles 1500 W single-event surges without degradation, complementing primary protection (e.g., fuses, MOVs) in redundant safety architectures. |
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 (400 W), but lower power rating and DO-214AC package; RθJA ≈ 100 °C/W vs. 75 °C/W. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); not AEC-Q101 qualified. | Select SMAJ120CA only for cost-sensitive consumer or non-automotive industrial designs where full 1500 W surge capacity is unnecessary. |
| 1.5KE120CA | Higher PPPM (1500 W), but axial-leaded DO-201AD package; requires through-hole assembly and larger board area. | Not suitable for high-density SMT layouts; lacks MSL Level 1 and AEC-Q101 compliance. | Choose 1.5KE120CA only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency. |
Compared with SMAJ120CA and 1.5KE120CA, SMCG120CA-E3/57T delivers superior thermal performance, automotive qualification, and SMT scalability-making it the preferred choice for volume automotive and industrial electronics requiring validated reliability and compact footprint.
Availability
SMCG120CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line driver circuits requiring stable component supply, AEC-Q101 compliance, and consistent surge immunity performance across production batches.
Supply support for SMCG120CA-E3/57T 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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified components.
The SMCG series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability applications-including automotive electronics, industrial controls, and communications infrastructure-where bidirectional clamping and MSL Level 1 process compatibility are mandatory.
FAQ
What is the clamping voltage of SMCG120CA-E3/57T under standard surge conditions?
The SMCG120CA-E3/57T clamps to a maximum of 193 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 7.8 A. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage seen by protected circuitry during surge events, directly impacting system-level immunity margins.
Is SMCG120CA-E3/57T suitable for automotive applications?
Yes, SMCG120CA-E3/57T is AEC-Q101 qualified and rated for operation from −55 °C to +150 °C junction temperature. Its construction-including glass-passivated junction, matte tin-plated leads, and UL 94 V-0 molding compound-meets stringent automotive environmental and reliability requirements for use in ECUs, ADAS sensors, and body control modules.
Does SMCG120CA-E3/57T require polarity-aware PCB layout?
No. SMCG120CA-E3/57T is a bidirectional TVS diode with symmetrical electrical characteristics in both directions. There is no cathode band or polarity marking on the SMCG (DO-215AB) package, and either terminal may be connected to signal or ground without affecting functionality.
What is the thermal resistance of SMCG120CA-E3/57T in typical mounting conditions?
SMCG120CA-E3/57T 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. Its junction-to-lead resistance (RθJL) is 15 °C/W, supporting efficient heat transfer to PCB copper planes in high-power surge scenarios.
How does the SMCG120CA-E3/57T differ from unidirectional variants like SMCG120A-E3/57T?
SMCG120CA-E3/57T is bidirectional with symmetrical VBR (133–147 V) and clamping behavior in both polarities, whereas SMCG120A-E3/57T is unidirectional with cathode marking and forward conduction capability. The "CA" suffix denotes bidirectional operation, making SMCG120CA-E3/57T ideal for AC-coupled or differential signal lines where polarity reversal occurs.
SMCG120CA-E3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG120CA-E3/57T FAQ
1.How can I place an order for SMCG120CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG120CA-E3/57T 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 SMCG120CA-E3/57T reliable?
The price and inventory of SMCG120CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG120CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG120CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG120CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG120CA-E3/57T?
SMCG120CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG120CA-E3/57T 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 SMCG120CA-E3/57T?
For technical support, including SMCG120CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG120CA-E3/57T requirements.
6.How does Aetrix verify that SMCG120CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG120CA-E3/57T 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 SMCG120CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG120CA-E3/57T?
All SMCG120CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG120CA-E3/57T, 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 SMCG120CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG120CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG120CA-E3/57T Tags
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