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Vishay General Semiconductor - Diodes Division SMCG18C-E3/57T
- Part No.:
- SMCG18C-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG18C-E3/57T.pdf
- Description:
- TVS DIODE 18VWM 32.2VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,640
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Product details
Overview
SMCG18C-E3/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) in DO-215AB (SMCG) package, designed for clamping voltage transients on signal and power lines. It features 18 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), 29.2 V maximum clamping voltage (VC) at IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG18C-E3/57T datasheet, SMCG18C-E3/57T pinout, SMCG18C-E3/57T application, or SMCG18C-E3/57T equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and DC power rail conditioning where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
The SMCG18C-E3/57T is a bi-directional silicon avalanche diode operating symmetrically in both polarities, with breakdown voltage (VBR) of 20.0–22.1 V at 1 mA test current. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive 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. It meets MSL Level 1 (260 °C reflow peak) and JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 18 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below system rail. |
| VBR (Breakdown Voltage) | 20.0–22.1 V at 1 mA - Ensures predictable turn-on threshold across temperature and production lot. |
| VC (Clamping Voltage) | 29.2 V at IPPM - Limits transient voltage seen by downstream ICs during 10/1000 µs surge events. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients such as ISO 7637-2 Pulse 1/2a/5a without degradation. |
| ID (Leakage Current) | 1.0 µA max at VWM - Minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
Pinout & Package
Package: DO-215AB (SMCG) - surface-mount gull-wing leaded package with 8.0 mm × 8.0 mm thermal pad layout recommendation; RoHS-compliant matte tin plating; no polarity marking for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Both terminals function identically; no cathode band marking; enables placement without orientation check. |
| Leads (L1/L2) | Thermal and electrical interface to PCB | Gull-wing leads provide mechanical compliance and low-inductance connection; solderable per J-STD-002/JESD 22-B102. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 1500 W 10/1000 µs surge rating | Withstands automotive load-dump and inductive switching surges per ISO 16750-2 and ISO 7637-2. |
| AEC-Q101 qualification | Validates reliability for automotive control units, body electronics, and ADAS sensor modules. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD > 30 kV contact discharge). |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without dry-pack or baking, reducing manufacturing overhead. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from battery dump and ESD in engine control modules. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at connector entry point to clamp ±200 V transients before reaching ASIC input pins. Use Value: Prevents latch-up and gate oxide damage in 3.3 V/5 V sensor signal chains while maintaining <1 µA leakage at 18 V bias. |
Use Scenario: Shielding PLC digital input channels from field-induced surges caused by relay coil switching and motor noise. IC Role / Device Role / Timing Role: Standoff-clamp protector on 24 V DC input lines, coordinated with series current-limiting resistor and optocoupler isolation. Use Value: Delivers 29.2 V clamping at 1500 W to hold downstream logic within safe SOA during 10/1000 µs surges up to 50 A. |
| DC Power Rail Conditioning | Telecom Line Interface |
Use Scenario: Secondary overvoltage protection on 12 V/24 V board-level power distribution networks after primary DC-DC converter output. IC Role / Device Role / Timing Role: Fast-response shunt limiter that activates within nanoseconds to divert surge energy away from PMICs and microcontrollers. Use Value: Clamps transients to ≤29.2 V while sustaining 1500 W pulses-critical for preventing brownout resets and flash corruption. |
Use Scenario: Surge suppression on RS-485/RS-422 differential pairs in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bi-directional TVS connected line-to-line and line-to-ground to handle common-mode and differential-mode transients. Use Value: Symmetrical 20–22.1 V breakdown ensures balanced clamping on both polarities, preserving signal integrity during 1 kV/1.2 µs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CA | Same VWM (18 V) and VC (29.2 V), but lower PPPM (400 W); SMA package (DO-214AC), smaller thermal mass. | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not rated for ISO 7637-2 Pulse 5a. | Select SMAJ18CA only for space-constrained consumer or non-automotive designs with verified lower surge exposure. |
| 1.5KE18CA | Higher PPPM (1500 W), same VWM/VC, but through-hole DO-15 package; higher RθJA (~50 °C/W on minimal pads). | Requires wave soldering or hand assembly; unsuitable for automated SMT lines or high-density boards. | Choose 1.5KE18CA for legacy through-hole systems or prototyping where reflow compatibility is not required. |
Compared with SMAJ18CA and 1.5KE18CA, the SMCG18C-E3/57T uniquely combines AEC-Q101 qualification, DO-215AB's optimized thermal pad layout, and full 1500 W surge capability in an SMT-compatible gull-wing package-making it the preferred choice for production automotive and industrial modules requiring zero rework risk and validated reliability.
Availability
SMCG18C-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, and telecom line interface applications requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for SMCG18C-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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMCG18C-E3/57T belongs to Vishay's TRANSZORB® family of transient voltage suppressors, engineered specifically for high-reliability surge protection in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage range of the SMCG18C-E3/57T?
The SMCG18C-E3/57T has a breakdown voltage (VBR) range of 20.0 V to 22.1 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This specification ensures consistent clamping behavior across temperature and process variation, and is confirmed in the Vishay datasheet document 88457, revision 14-Mar-12. The SMCG18C-E3/57T maintains this range under both positive and negative polarity due to its bi-directional construction.
Is the SMCG18C-E3/57T suitable for automotive applications?
Yes, the SMCG18C-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with operating junction temperatures up to +150 °C. It meets ISO 7637-2 surge immunity requirements and is listed in Vishay's automotive-grade product portfolio. The SMCG18C-E3/57T also complies with JESD 201 Class 1A whisker resistance and MSL Level 1 reflow compatibility.
What does the "CA" suffix in SMCG18C-E3/57T indicate?
The "CA" suffix denotes a bi-directional configuration, meaning the SMCG18C-E3/57T provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike uni-directional variants (e.g., SMCG18A), the CA version has no cathode marking and operates identically in either polarity-ideal for AC-coupled or floating signal paths. This is defined in the Vishay TRANSZORB® documentation and confirmed in the electrical characteristics table on page 2 of datasheet 88457.
What is the maximum clamping voltage of the SMCG18C-E3/57T at rated surge current?
The SMCG18C-E3/57T has a maximum clamping voltage (VC) of 29.2 V at its peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured with the device mounted on the recommended 8.0 mm × 8.0 mm copper pad layout and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events. The SMCG18C-E3/57T achieves this while delivering 1500 W peak pulse power dissipation.
Does the SMCG18C-E3/57T require orientation during PCB placement?
No, the SMCG18C-E3/57T does not require orientation during placement because it is a bi-directional device with no polarity marking-unlike uni-directional variants that feature a cathode band. The DO-215AB package has symmetrical terminals, and both ends perform identically under reverse or forward surge conditions. This simplifies automated pick-and-place programming and eliminates orientation-related assembly defects for the SMCG18C-E3/57T.
SMCG18C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 32.2V
- Current - Peak Pulse (10/1000µs):
- 46.6A
- 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)
SMCG18C-E3/57T FAQ
1.How can I place an order for SMCG18C-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG18C-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 SMCG18C-E3/57T reliable?
The price and inventory of SMCG18C-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 SMCG18C-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG18C-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG18C-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG18C-E3/57T?
SMCG18C-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG18C-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 SMCG18C-E3/57T?
For technical support, including SMCG18C-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG18C-E3/57T requirements.
6.How does Aetrix verify that SMCG18C-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG18C-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 SMCG18C-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG18C-E3/57T?
All SMCG18C-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG18C-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 SMCG18C-E3/57T part is unused and in its original packaging.
Return procedure for SMCG18C-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG18C-E3/57T Tags
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