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Vishay General Semiconductor - Diodes Division SMCG18CHE3/57T
- Part No.:
- SMCG18CHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG18CHE3/57T.pdf
- Description:
- TVS DIODE 18VWM 32.2VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,939
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Product details
Overview
SMCG18CHE3/57T from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) in DO-215AB (SMCG) package, designed for clamping voltage transients on signal/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, AEC-Q101 qualification, and RoHS compliance with HE3 suffix.
For engineers reviewing the SMCG18CHE3/57T datasheet, SMCG18CHE3/57T pinout, SMCG18CHE3/57T application, or SMCG18CHE3/57T equivalent, key selection criteria include bi-directional surge protection capability, automotive-grade reliability per AEC-Q101, low clamping ratio (VC/VWM ≈ 1.62), DO-215AB thermal performance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions, with breakdown voltage (VBR) specified at 20.0–22.1 V (min/max) under 1 mA test current. Its bi-directional architecture eliminates polarity concerns in AC-coupled or differential signal paths, enabling use without orientation verification during assembly.
The device delivers 1500 W peak pulse power handling per 10/1000 μs waveform, with clamping voltage held to ≤29.2 V at rated IPPM. Thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead) supports sustained operation up to TJ = 150 °C, validated under MSL Level 1 reflow conditions (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working range for protected circuitry. |
| VC @ IPPM | 29.2 V - Clamped voltage at full 1500 W surge; ensures downstream ICs see no more than this voltage during transient events. |
| PPPM | 1500 W - Peak pulse power dissipation capability with 10/1000 μs waveform; determines survivability against lightning or ESD surges. |
| TJ max. | +150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm pads; guides PCB thermal layout requirements. |
| AEC-Q101 | Qualified - Certified for automotive electronics per stress-test standard; validates robustness for engine control, ADAS, and infotainment systems. |
| Package | DO-215AB (SMCG) - Surface-mount gull-wing package with matte tin leads; compatible with J-STD-002 solderability and JESD22-B102 reliability testing. |
Pinout & Package
DO-215AB (SMCG) is a bi-directional surface-mount package with two terminals and no polarity marking. The device has symmetrical electrical behavior; either terminal may serve as anode or cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bi-directional surge path | Carries transient current in either direction; connects to line being protected (e.g., CAN_H or LIN bus). |
| Terminal 2 | Bi-directional surge path | Completes symmetrical clamping path to ground or reference; requires low-inductance connection to chassis or local ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485, CAN), and ungrounded sensor outputs without polarity constraints. |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain, body electronics, and ADAS sensors subjected to temperature cycling and mechanical shock. |
| Glass passivated junction | Provides stable VBR over lifetime and immunity to moisture-induced degradation, critical for long-term field reliability in humid environments. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak, eliminating bake-out requirements and supporting high-volume automated manufacturing. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving protection margin for sensitive 3.3 V or 5 V logic interfaces. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against load dump and inductive switching transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between CAN bus and transceiver, absorbing energy while holding common-mode voltage within transceiver tolerance. Use Value: Maintains CAN communication integrity by limiting clamped voltage to 29.2 V, well below typical transceiver absolute maximum ratings (±40 V), preventing latch-up or damage. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation against EFT and surge events. IC Role / Device Role / Timing Role: Fast-response shunt protector across sensor output and system ground, diverting >1 kV transients before reaching ADC input or isolation barrier. Use Value: Achieves sub-nanosecond response time and low clamping voltage, preserving signal fidelity and avoiding measurement errors caused by transient-induced saturation. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding Ethernet PHY interface (e.g., 10/100BASE-TX) in network switches against lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on each differential pair (TX+/TX−, RX+/RX−), coordinated with secondary GDT or polymer PTC for multi-stage protection. Use Value: Handles 1500 W peak power per line pair, meeting IEC 61000-4-5 Level 4 (4 kV line-earth) requirements when combined with proper PCB layout and grounding. |
Use Scenario: Adding robust ESD immunity to USB 2.0 data lines (D+/D−) and VBUS in portable devices exposed to human-body model (HBM) discharges. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector, shunting ±15 kV HBM pulses to ground before reaching USB controller. Use Value: Provides <100 ps response and <1 nA leakage at 18 V, ensuring no impact on signal integrity or VBUS regulation while passing IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact). |
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 bi-directionality, but lower PPPM (400 W) and higher VC (32.4 V); DO-214AC (SMA) package with larger footprint and higher RθJA (110 °C/W). | Not qualified to AEC-Q101; suitable for commercial/industrial use only, not automotive. | Select SMAJ18CA only if cost sensitivity outweighs automotive qualification and surge margin requirements. |
| SMCJ18CA | Same VWM (18 V), higher PPPM (1500 W), identical VC (29.2 V), but larger DO-214AB (SMC) package (7.11 mm × 6.22 mm vs. SMCG's 7.11 mm × 5.59 mm) and higher weight (0.33 g vs. 0.211 g). | Also AEC-Q101 qualified; better thermal mass but less space-efficient for dense layouts. | Choose SMCJ18CA where board space allows and higher thermal inertia is beneficial, e.g., high-temperature ambient zones. |
Compared with SMAJ18CA and SMCJ18CA, SMCG18CHE3/57T delivers identical surge clamping performance and automotive qualification in the smallest footprint among the three, enabling miniaturized designs without sacrificing reliability or power handling.
Availability
SMCG18CHE3/57T is available at Aetrix Electronics and suitable for automotive CAN bus protection, industrial sensor interface hardening, telecom line surge suppression, and consumer USB port ESD protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCG18CHE3/57T 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 reliability, efficiency, and application-specific optimization.
The SMCG series targets high-reliability transient suppression in space-constrained, thermally demanding environments-especially automotive and industrial systems where AEC-Q101 compliance and low-profile packaging are mandatory.
FAQ
What is the clamping voltage of SMCG18CHE3/57T at its rated peak pulse current?
The SMCG18CHE3/57T has a maximum clamping voltage (VC) of 29.2 V when subjected to its rated peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured at the device's specified PPPM of 1500 W and ensures protected circuits remain within safe voltage limits during surge events. The SMCG18CHE3/57T maintains this clamping performance across its operational temperature range.
Is SMCG18CHE3/57T suitable for automotive applications?
Yes, SMCG18CHE3/57T is AEC-Q101 qualified and explicitly designed for automotive use. Its qualification covers temperature cycling, humidity testing, mechanical shock, and vibration per the standard, making it appropriate for engine control units, body electronics, infotainment systems, and ADAS sensors. The HE3 suffix confirms its automotive-grade status, and the SMCG18CHE3/57T meets MSL Level 1 for lead-free reflow compatibility.
What does the "HE3" suffix in SMCG18CHE3/57T indicate?
The "HE3" suffix in SMCG18CHE3/57T denotes RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It distinguishes the automotive-grade version from the commercial "E3" variant (e.g., SMCG18AE3/57T), which lacks AEC-Q101 validation. The SMCG18CHE3/57T also features matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
How does the DO-215AB (SMCG) package compare to DO-214AB (SMC) in size and thermal performance?
The DO-215AB (SMCG) package used by SMCG18CHE3/57T measures 7.11 mm × 5.59 mm, making it 0.63 mm narrower than DO-214AB (SMC) at 7.11 mm × 6.22 mm. Despite its smaller footprint, SMCG18CHE3/57T achieves identical thermal resistance values (RθJA = 75 °C/W, RθJL = 15 °C/W) when mounted on the recommended 8.0 mm × 8.0 mm copper pads, offering superior space efficiency without compromising thermal capability.
Can SMCG18CHE3/57T be used in bi-directional signal lines like RS-485 or CAN?
Yes, SMCG18CHE3/57T is specifically designed for bi-directional applications, as indicated by the "CA" suffix. Its symmetrical VBR (20.0–22.1 V) and clamping behavior in both polarities make it ideal for protecting differential buses such as CAN, RS-485, and LVDS. The SMCG18CHE3/57T requires no polarity marking during placement and provides matched protection on both signal lines without additional components.
SMCG18CHE3/57T 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG18CHE3/57T FAQ
1.How can I place an order for SMCG18CHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG18CHE3/57T 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 SMCG18CHE3/57T reliable?
The price and inventory of SMCG18CHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG18CHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG18CHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG18CHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG18CHE3/57T?
SMCG18CHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG18CHE3/57T 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 SMCG18CHE3/57T?
For technical support, including SMCG18CHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG18CHE3/57T requirements.
6.How does Aetrix verify that SMCG18CHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG18CHE3/57T 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 SMCG18CHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG18CHE3/57T?
All SMCG18CHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG18CHE3/57T, 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 SMCG18CHE3/57T part is unused and in its original packaging.
Return procedure for SMCG18CHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG18CHE3/57T Tags
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