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Vishay General Semiconductor - Diodes Division SMCG18CHE3/9AT
- Part No.:
- SMCG18CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG18CHE3/9AT.pdf
- Description:
- TVS DIODE 18VWM 32.2VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,703
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Product details
Overview
SMCG18CHE3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) in DO-215AB (SMCG) package, rated for 18 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), and clamping voltage of 29.2 V at 54.3 A IPPM. It provides robust ESD and surge protection for automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCG18CHE3/9AT datasheet, SMCG18CHE3/9AT pinout, SMCG18CHE3/9AT application, or SMCG18CHE3/9AT equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 reflow compatibility - critical for automotive-grade board-level transient suppression design.
Technical Context
This bi-directional TVS operates symmetrically in both polarities with identical breakdown (VBR min/max = 20.0 V / 22.1 V at 1 mA), stand-off (VWM = 18 V), and clamping (VC = 29.2 V at IPPM) characteristics. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response to transients under 10/1000 μs waveforms.
Designed for surface-mount placement on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it delivers thermal resistance of RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C in high-density automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before clamping begins |
| PPPM | 1500 W - peak transient energy absorption capability under 10/1000 μs waveform |
| VC @ IPPM | 29.2 V at 54.3 A - clamped voltage during worst-case surge, limiting stress on downstream ICs |
| VBR | 20.0–22.1 V at 1 mA - precise bidirectional breakdown threshold ensuring symmetrical protection |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves signal integrity in high-impedance sensor circuits |
| TJ max. | +150 °C - supports under-hood automotive environments without derating |
| MSL Level | Level 1 (260 °C peak) - compatible with standard lead-free reflow profiles without baking |
Pinout & Package
DO-215AB (SMCG) surface-mount package with gull-wing leads; matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; bi-directional devices have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either polarity - no cathode band marking required |
| Lead 1 / Lead 2 | PCB interconnect interface | Gull-wing terminations designed for automated placement and 0.31" × 0.31" copper pad layout per terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| MSL Level 1 rating | Enables direct placement into high-volume SMT lines without pre-bake or special handling |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional clamping device placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Clamps 18 V transients to ≤29.2 V within nanoseconds, preserving signal fidelity and preventing latch-up in 5 V microcontrollers. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series current-limiting resistors. Use Value: Absorbs 1500 W peak pulses without degradation, maintaining <1.0 μA leakage to avoid false triggering in high-impedance sensing circuits. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Secondary-side surge suppression in AC/DC adapters exposed to mains-borne transients per IEC 61000-4-5. IC Role / Device Role / Timing Role: Fast-acting TVS across DC output rails to protect downstream USB-PD controllers and voltage regulators. Use Value: Delivers 29.2 V clamping at 54.3 A with sub-nanosecond response, limiting stress on 20 V-rated MOSFETs and capacitors. | Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors subjected to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Bidirectional clamp on differential pairs and power rails to meet GR-1089-CORE telecom immunity requirements. Use Value: Symmetric 20.0–22.1 V breakdown enables balanced common-mode suppression without polarity concerns. |
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 PPPM (400 W), but lower power rating and SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is prioritized over automotive qualification and 1500 W surge capacity |
| SMCJ18CA | Identical VWM (18 V), PPPM (1500 W), and DO-214AB package; AEC-Q101 qualified | Same footprint as SMCG18CHE3/9AT but with slightly higher VC (32.4 V vs. 29.2 V) | Choose when existing SMCJ-based designs require drop-in replacement with minimal clamping voltage trade-off |
Compared with SMAJ18CA and SMCJ18CA, SMCG18CHE3/9AT offers superior thermal performance (RθJL = 15 °C/W), tighter clamping (29.2 V), and DO-215AB's optimized gull-wing geometry for automated placement yield - making it preferred for new AEC-Q101-compliant automotive designs demanding highest surge robustness.
Availability
SMCG18CHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line card protection requiring stable component supply and full AEC-Q101 compliance.
Supply support for SMCG18CHE3/9AT 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, rectifiers, and protection devices with emphasis on reliability and automotive-grade validation.
The SMCG series is engineered specifically for high-power, bi-directional transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification and 1500 W surge handling are mandatory.
FAQ
What is the clamping voltage of SMCG18CHE3/9AT at its rated peak pulse current?
The SMCG18CHE3/9AT has a maximum clamping voltage (VC) of 29.2 V at its specified peak pulse current (IPPM) of 54.3 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream circuitry remains below safe voltage thresholds during surge events. The SMCG18CHE3/9AT maintains this clamping performance consistently across its operating temperature range.
Is SMCG18CHE3/9AT suitable for automotive applications?
Yes, SMCG18CHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and bi-directional symmetry make it appropriate for protecting CAN/LIN transceivers, sensor interfaces, and body control modules. The SMCG18CHE3/9AT meets stringent automotive reliability and surge immunity requirements.
What does the 'HE3' suffix indicate in SMCG18CHE3/9AT?
The 'HE3' suffix in SMCG18CHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this automotive-grade variant from commercial 'E3' versions. The SMCG18CHE3/9AT is therefore certified for mission-critical automotive systems where long-term reliability and tin whisker mitigation are essential.
How does the DO-215AB package of SMCG18CHE3/9AT compare to DO-214AB?
The DO-215AB (SMCG) package used by SMCG18CHE3/9AT features gull-wing leads optimized for automated placement yield and improved thermal dissipation versus DO-214AB's J-leads. Its standardized 0.31" × 0.31" pad layout and RθJL = 15 °C/W enhance power handling. Unlike DO-214AB, DO-215AB supports higher surge currents without thermal runaway - a key advantage for the SMCG18CHE3/9AT in high-energy protection roles.
What is the maximum reverse leakage current for SMCG18CHE3/9AT at its stand-off voltage?
The SMCG18CHE3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 18 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and prevents false triggering in precision analog front-ends. The SMCG18CHE3/9AT maintains this specification across its full operating temperature range.
SMCG18CHE3/9AT 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:
- 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)
SMCG18CHE3/9AT FAQ
1.How can I place an order for SMCG18CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG18CHE3/9AT 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 SMCG18CHE3/9AT reliable?
The price and inventory of SMCG18CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG18CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG18CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG18CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG18CHE3/9AT?
SMCG18CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG18CHE3/9AT 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 SMCG18CHE3/9AT?
For technical support, including SMCG18CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG18CHE3/9AT requirements.
6.How does Aetrix verify that SMCG18CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG18CHE3/9AT 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 SMCG18CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG18CHE3/9AT?
All SMCG18CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG18CHE3/9AT, 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 SMCG18CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG18CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG18CHE3/9AT Tags
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