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Vishay General Semiconductor - Diodes Division SMCG17CA-E3/9AT
- Part No.:
- SMCG17CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG17CA-E3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,181
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Product details
Overview
SMCG17CA-E3/9AT 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 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 27.6 V at 54.3 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG17CA-E3/9AT datasheet, SMCG17CA-E3/9AT pinout, SMCG17CA-E3/9AT application, or SMCG17CA-E3/9AT equivalent, this device is selected for robust ESD and lightning surge protection in automotive sensor interfaces, industrial I/O modules, and telecom line cards where bidirectional clamping, low clamping ratio, and MSL Level 1 reflow compatibility are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (18.9 V / 20.9 V), ID ≤ 1.0 µA at VWM = 17 V, and VC = 27.6 V under 10/1000 µs surge conditions. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while the DO-215AB package supports automated placement and meets UL 94 V-0 flammability.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling operation up to TJ = +150 °C. The device is rated for non-repetitive peak pulse current IPPM = 54.3 A and forward surge current IFSM = 200 A (unidirectional only - not applicable here due to bidirectional configuration).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse working voltage before clamping initiates |
| VBR (min/max) | 18.9 V / 20.9 V at IT = 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 27.6 V at 54.3 A - clamped voltage during 10/1000 µs surge, defining protected circuit stress level |
| PPPM | 1500 W - peak surge energy handling capacity per single transient event |
| ID @ VWM | ≤1.0 µA - ultra-low leakage ensures minimal standby power loss and signal integrity |
| TJ max. | +150 °C - extended junction temperature rating supports under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive electronic systems per stress test requirements |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded, 2-terminal bidirectional configuration with no polarity marking. Meets J-STD-020 MSL Level 1 (peak reflow 260 °C), UL 94 V-0, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Identical terminal behavior in both directions; no polarity marking required |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically symmetric to Terminal 1; forms differential clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 50 Ω source impedance lines |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment interfaces |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing surge energy before it reaches the transceiver or ADC input. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while meeting AEC-Q101 reliability requirements. |
Use Scenario: Safeguarding full-duplex RS-485 transceivers in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Differential-line TVS connected across A/B bus lines and referenced to ground, suppressing common-mode and differential-mode surges. Use Value: Clamps transients to <28 V, preventing latch-up or damage to ±12 V tolerant transceivers such as THVD1550. |
| Telecom Line Card Protection | Consumer USB Port ESD |
Use Scenario: Front-end surge protection for xDSL or POTS line interface circuits in DSLAMs and VoIP gateways subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary coarse protection stage ahead of gas discharge tube (GDT) and secondary TVS, handling >1 kA surge currents. Use Value: Absorbs 1500 W peak pulses per IEC 61000-4-5 Ed.3, reducing GDT follow-on current stress and extending system lifetime. |
Use Scenario: Secondary-level ESD and surge suppression on USB 2.0 D+/D− lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp placed after common-mode choke, shunting HBM ±15 kV and IEC 61000-4-2 ±8 kV discharges. Use Value: Limits voltage excursion to <28 V within <1 ns, preventing damage to USB PHYs like TUSB2036 while maintaining signal rise time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA | Same VWM (17 V), lower PPPM (400 W), SMA (DO-214AC) package, higher RθJA (110 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select when cost sensitivity outweighs surge margin and board space allows larger pad layout for thermal relief |
| 1.5KE18CA | Higher VWM (18 V), same PPPM (1500 W), axial DO-15 package, no AEC-Q101 qualification | Requires through-hole assembly; not qualified for automotive electronics or automated SMT lines | Choose only for legacy through-hole designs where rework to SMT is impractical and automotive compliance is not required |
Compared with SMAJ17CA and 1.5KE18CA, the SMCG17CA-E3/9AT delivers superior thermal performance (RθJL = 15 °C/W), AEC-Q101 qualification, and compact DO-215AB packaging-enabling higher surge resilience in space-constrained automotive and industrial SMT assemblies without compromising reliability.
Availability
SMCG17CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, and telecom line card surge suppression requiring stable component supply, AEC-Q101 compliance, and 13" tape-and-reel logistics support.
Supply support for SMCG17CA-E3/9AT 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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional transient suppression in harsh environments-including under-hood automotive, industrial controls, and telecom infrastructure.
FAQ
What is the clamping voltage of SMCG17CA-E3/9AT at its rated peak pulse current?
The SMCG17CA-E3/9AT has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) of 54.3 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG17CA-E3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCG17CA-E3/9AT suitable for automotive applications?
Yes, SMCG17CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and infotainment systems. Its construction-glass-passivated junction, DO-215AB package with matte tin leads, and operation up to +150 °C-meets stringent automotive reliability and thermal requirements. The SMCG17CA-E3/9AT appears in Vishay's AEC-Q101-compliant product listings with full test report traceability.
How does the bidirectional configuration of SMCG17CA-E3/9AT affect its circuit implementation?
The SMCG17CA-E3/9AT has no polarity marking and functions identically in both directions, making it ideal for protecting AC-coupled, floating, or differential signal paths-such as RS-485 A/B lines or transformer-coupled Ethernet PHYs-without requiring orientation verification during placement. Unlike unidirectional TVS diodes, the SMCG17CA-E3/9AT eliminates risk of reverse installation and simplifies layout for symmetric protection schemes.
What is the thermal resistance profile of SMCG17CA-E3/9AT, and how does it impact PCB layout?
The SMCG17CA-E3/9AT has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To achieve rated power dissipation, designers must provide adequate copper area and avoid thermal bottlenecks; the SMCG17CA-E3/9AT benefits from direct thermal vias to inner ground planes in high-reliability layouts.
Does SMCG17CA-E3/9AT meet RoHS and halogen-free requirements?
Yes, the "E3" suffix in SMCG17CA-E3/9AT denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads. It meets JEDEC JESD201 Class 2 whisker resistance and UL 94 V-0 flammability. While not halogen-free (that requires "M3" suffix), the SMCG17CA-E3/9AT is fully compliant with EU RoHS Directive 2011/65/EU and China RoHS II, and is documented as such in Vishay's material declarations (Doc. #99912).
SMCG17CA-E3/9AT 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 54.3A
- 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)
SMCG17CA-E3/9AT FAQ
1.How can I place an order for SMCG17CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG17CA-E3/9AT 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 SMCG17CA-E3/9AT reliable?
The price and inventory of SMCG17CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG17CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG17CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG17CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG17CA-E3/9AT?
SMCG17CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG17CA-E3/9AT 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 SMCG17CA-E3/9AT?
For technical support, including SMCG17CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG17CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG17CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG17CA-E3/9AT 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 SMCG17CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG17CA-E3/9AT?
All SMCG17CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG17CA-E3/9AT, 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 SMCG17CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG17CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG17CA-E3/9AT Tags
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