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Vishay General Semiconductor - Diodes Division SMCG170CA-E3/9AT
- Part No.:
- SMCG170CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG170CA-E3/9AT.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,763
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Product details
Overview
SMCG170CA-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 170 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 275 V at 5.5 A IPPM, and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMCG170CA-E3/9AT datasheet, SMCG170CA-E3/9AT pinout, SMCG170CA-E3/9AT application, or SMCG170CA-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 and MSL Level 1 solderability are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified as 189–209 V at 1 mA test current. Its low incremental surge resistance and fast response time enable effective suppression of 10/1000 µs transients without degradation under repeated surges.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = +150 °C. The device uses glass-passivated junction technology and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 189 V / 209 V at 1 mA - Ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 275 V at 5.5 A - Clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - Peak transient energy absorption capability per single event |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments |
| MSL Level | Level 1 (260 °C peak) - Supports standard lead-free reflow without preconditioning |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability and lifetime performance |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing package with 2 terminals; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | Either terminal accepts positive or negative transients; no cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and long-term reliability in harsh environments |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| MSL Level 1 rating | Eliminates moisture sensitivity concerns and enables direct placement into Pb-free reflow |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control, ADAS sensors, and body electronics |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and telecom equipment |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector interface to shunt surge energy before it reaches sensitive ICs. Use Value: Maintains signal fidelity below 1 µA leakage while clamping 1500 W transients to ≤275 V, preventing latch-up or damage to 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding digital input/output channels in programmable logic controllers exposed to inductive switching noise and field wiring surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC I/O lines, coordinated with upstream fusing and filtering. Use Value: Withstands repeated 10/1000 µs surges up to 5.5 A without parameter shift, ensuring long-term protection integrity in factory automation systems. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHYs and DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-stage protector on RJ-45 or F-type coaxial interfaces, working with GDTs or secondary TVS arrays. Use Value: Fast 10/1000 µs response and symmetrical clamping ensure compliance with ITU-T K.21 basic protection level for public network equipment. | Use Scenario: Input-stage surge suppression on AC-DC adapter primary-side rectifier outputs and secondary-side 12 V rails. IC Role / Device Role / Timing Role: Secondary-level TVS after bulk filtering, targeting fast transients escaping MOV-based primary protection. Use Value: 170 V VWM aligns with 12 V rail derating margins; 275 V VC prevents overvoltage stress on downstream DC-DC converters and LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170CA | Same VWM (170 V) and PPPM (1500 W), but SMA (DO-214AC) package with higher RθJA (90 °C/W) | Larger footprint and lower thermal efficiency; less suitable for high-density automotive PCBs | Choose SMAJ170CA only if DO-215AB assembly infrastructure is unavailable |
| SMCJ170CA | Same VWM and PPPM, but SMC (DO-214AB) package with 1.5× larger body and higher IFSM (200 A) | Higher surge current handling but incompatible with fine-pitch layouts requiring SMCG's compact 7.11 mm × 6.22 mm outline | Select SMCJ170CA when board space allows and higher single-pulse IFSM margin is critical |
Compared with SMAJ170CA and SMCJ170CA, the SMCG170CA-E3/9AT delivers identical electrical protection performance in a smaller, thermally optimized DO-215AB package with AEC-Q101 validation-making it the preferred choice for space-constrained, automotive-qualified designs.
Availability
SMCG170CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card protection requiring stable component supply and full traceability.
Supply support for SMCG170CA-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, and protection devices with emphasis on reliability and application-specific optimization.
The SMCG series is engineered for high-power transient suppression in automotive, industrial, and telecom systems where compact size, AEC-Q101 compliance, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SMCG170CA-E3/9AT at its rated peak pulse current?
The SMCG170CA-E3/9AT has a maximum clamping voltage (VC) of 275 V when subjected to its specified peak pulse current (IPPM) of 5.5 A under the 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events, protecting downstream 12 V or 24 V circuitry from overvoltage damage.
Is SMCG170CA-E3/9AT suitable for automotive applications?
Yes, SMCG170CA-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction-including glass-passivated junction, MSL Level 1 compatibility, and operation up to +150 °C junction temperature-meets stringent requirements for engine control units, ADAS sensors, and body electronics where reliability under thermal and mechanical stress is critical. The "HE3" and "HM3" variants in the same family carry explicit AEC-Q101 markings, and the E3/9AT variant shares identical die and qualification data per Vishay documentation.
How does the SMCG170CA-E3/9AT differ from unidirectional versions like SMCG170A-E3/9AT?
The SMCG170CA-E3/9AT is bidirectional, meaning it clamps voltage transients of either polarity symmetrically, with no cathode marking. In contrast, SMCG170A-E3/9AT is unidirectional, featuring a cathode band and conducting only in reverse bias. Both share identical VWM (170 V), PPPM (1500 W), and package (SMCG), but the CA version is used where AC-coupled or differential signal lines require protection without polarity constraints.
What is the thermal resistance of SMCG170CA-E3/9AT, and how does it affect layout design?
SMCG170CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W, measured on the recommended 8.0 mm × 8.0 mm copper pad per terminal. To maintain safe operation near its 150 °C max junction temperature, PCB layout must replicate this pad area and avoid excessive trace length or isolation; insufficient copper will cause thermal derating and premature failure under repeated surges.
Does SMCG170CA-E3/9AT have UL recognition, and what does that cover?
Yes, SMCG170CA-E3/9AT carries Underwriters Laboratories recognition under file number E136766 for both unidirectional and bidirectional devices, per UL 497B for signal circuit protectors. This certification validates its safety performance in surge protection applications, including flammability (UL 94 V-0 housing), dielectric strength, and failure mode behavior-enabling use in certified end-equipment such as industrial gateways and automotive telematics modules.
SMCG170CA-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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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)
SMCG170CA-E3/9AT FAQ
1.How can I place an order for SMCG170CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG170CA-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 SMCG170CA-E3/9AT reliable?
The price and inventory of SMCG170CA-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 SMCG170CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG170CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG170CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG170CA-E3/9AT?
SMCG170CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG170CA-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 SMCG170CA-E3/9AT?
For technical support, including SMCG170CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG170CA-E3/9AT requirements.
6.How does Aetrix verify that SMCG170CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG170CA-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 SMCG170CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG170CA-E3/9AT?
All SMCG170CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG170CA-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 SMCG170CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG170CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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