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Vishay General Semiconductor - Diodes Division SMCJ170C-E3/9AT
- Part No.:
- SMCJ170C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170C-E3/9AT.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,744
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Product details
Overview
SMCJ170C-E3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. 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 SMCJ170C-E3/9AT datasheet, SMCJ170C-E3/9AT pinout, SMCJ170C-E3/9AT application, or SMCJ170C-E3/9AT equivalent, this device is selected for high-energy surge suppression in automotive power lines, industrial sensor interfaces, DC bus protection, and telecom line cards where bidirectional clamping and low incremental surge resistance are critical.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) min/max of 189 V / 209 V at 1 mA test current, and clamps transients within 10/1000 μs waveform to ≤275 V. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ps).
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is rated for 8.3 ms single half-sine surge current up to 200 A in uni-directional mode - though SMCJ170C-E3/9AT itself is bi-directional and thus not rated for IFSM.
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 - guaranteed breakdown range ensuring predictable turn-on threshold |
| VC @ IPPM | 275 V at 5.5 A - clamped voltage during 10/1000 μs surge, defining protected circuit's max stress level |
| PPPM | 1500 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| Package | DO-214AB (SMCJ) - surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal derating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SMCJ170C-E3/9AT uses the DO-214AB (SMCJ) package: molded plastic case with J-bend leads, matte tin-plated terminals solderable per J-STD-002, and no polarity marking (bi-directional configuration). Mounting requires 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal for full power rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | No polarity designation; either terminal serves as input/output for transient conduction in both directions |
| Case (body) | Non-electrical mechanical interface | UL 94 V-0 rated molding compound provides flame resistance and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| Glass passivated junction | Ensures long-term parameter stability and low leakage drift over temperature and lifetime |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure |
| RoHS-compliant & whisker-tested | E3 suffix meets JESD 201 Class 1A tin whisker resistance, suitable for high-reliability assemblies |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Clamps 1500 W surges to ≤275 V while maintaining <1.0 μA leakage, preserving low-power sleep modes. |
Use Scenario: Safeguarding 4–20 mA current loop transmitters and analog sensor outputs in factory automation. IC Role / Device Role / Timing Role: Bidirectional shunt protector on signal lines exposed to ESD and inductive switching noise. Use Value: Symmetric clamping prevents signal inversion or offset shift during ±kV ESD events (IEC 61000-4-2 Level 4). |
| Telecom Line Card Surge Suppression | DC Bus Overvoltage Clamp |
Use Scenario: Secondary protection on POTS or xDSL line interfaces subjected to lightning-induced surges (ITU-T K.20/K.44). IC Role / Device Role / Timing Role: Fast-response clamp parallel to primary GDT or MOV, limiting let-through voltage to downstream ICs. Use Value: Sub-nanosecond response and 275 V clamping ensure compliance with GR-1089-CORE surge immunity requirements. |
Use Scenario: Guarding 170 V-rated motor drive DC links against regeneration spikes and IGBT switching transients. IC Role / Device Role / Timing Role: Standoff-matched TVS absorbing repetitive 10/1000 μs surges without degradation. Use Value: 170 V VWM aligns precisely with system nominal voltage, maximizing margin before clamping onset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC170CA | Same VWM (170 V) and PPPM (1500 W), but smaller DO-214AA (SMA) package; lower thermal mass and higher RθJA (100 °C/W) | Limited to lower average power or pulsed duty cycles due to reduced thermal dissipation | Select when board space is constrained and surge duty is infrequent or low-duty-cycle |
| SMCJ170CAHE3/9AT | Identical electrical specs and DO-214AB package, but HE3 suffix indicates AEC-Q101 qualification with enhanced stress testing (e.g., higher HTRB cycles) | Required for ASIL-B/C automotive subsystems demanding extended reliability validation | Choose for safety-critical automotive modules where full AEC-Q101 traceability and extended lifetime data are mandated |
Compared with SMCJ170C-E3/9AT, SAC170CA trades thermal robustness for compactness, while SMCJ170CAHE3/9AT adds qualification rigor without altering electrical behavior - enabling direct selection based on thermal budget or automotive safety tier requirements.
Availability
SMCJ170C-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, and telecom line card designs requiring stable component supply, RoHS compliance, and AEC-Q101-qualified surge protection.
Supply support for SMCJ170C-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 reliability, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where consistent clamping performance and long-term stability under surge stress are mandatory.
FAQ
What is the clamping voltage of SMCJ170C-E3/9AT and how is it measured?
The clamping voltage (VC) of SMCJ170C-E3/9AT is 275 V, measured at a peak pulse current (IPPM) of 5.5 A using the standardized 10/1000 μs double-exponential surge waveform. This value defines the maximum voltage imposed on protected circuitry during a transient event and is guaranteed across the full operating temperature range per Vishay Document 88394.
Is SMCJ170C-E3/9AT unidirectional or bidirectional, and how does that affect its use?
SMCJ170C-E3/9AT is a bi-directional TVS diode, indicated by the "C" suffix and absence of cathode band marking. It clamps transients equally in both polarities, making it ideal for protecting AC-coupled signals, floating buses, or any circuit where voltage reversals may occur - unlike unidirectional variants such as SMCJ170A-E3/9AT which require correct polarity orientation.
Does SMCJ170C-E3/9AT meet automotive qualification standards?
Yes, SMCJ170C-E3/9AT is AEC-Q101 qualified, as confirmed in Vishay's datasheet revision 11-Dec-12 (Document Number 88394). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD, validating its suitability for automotive powertrain, body, and chassis applications.
What is the meaning of the "E3/9AT" suffix in SMCJ170C-E3/9AT?
The "E3" denotes RoHS-compliant, commercial-grade construction with JESD 201 Class 1A whisker resistance; "9AT" specifies packaging in 13-inch diameter tape-and-reel format with 3500 units per reel. This differs from "57T" (7-inch reel, 850 units) and "HE3" (AEC-Q101 qualified variant), confirming SMCJ170C-E3/9AT's commercial automotive-readiness.
How does the thermal design of SMCJ170C-E3/9AT impact PCB layout?
SMCJ170C-E3/9AT requires 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal to achieve its rated 1500 W PPPM. Smaller pads increase thermal resistance (RθJA = 75 °C/W is specified at this layout), causing premature thermal derating - especially above TA = 25 °C. Use internal ground/power planes and thermal vias beneath pads to sustain performance in high-ambient environments.
SMCJ170C-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 4.9A
- 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 (SMCJ)
SMCJ170C-E3/9AT FAQ
1.How can I place an order for SMCJ170C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170C-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 SMCJ170C-E3/9AT reliable?
The price and inventory of SMCJ170C-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 SMCJ170C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ170C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170C-E3/9AT?
SMCJ170C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170C-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 SMCJ170C-E3/9AT?
For technical support, including SMCJ170C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170C-E3/9AT requirements.
6.How does Aetrix verify that SMCJ170C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ170C-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 SMCJ170C-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ170C-E3/9AT?
All SMCJ170C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170C-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 SMCJ170C-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ170C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170C-E3/9AT Tags
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