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Vishay General Semiconductor - Diodes Division SMCJ17CA-M3/9AT
- Part No.:
- SMCJ17CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CA-M3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,782
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Product details
Overview
SMCJ17CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 27.6 V maximum clamping voltage (VC) at 54.3 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed on power rails and signal lines in automotive ECUs and industrial I/O modules.
For engineers reviewing the SMCJ17CA-M3/9AT datasheet, SMCJ17CA-M3/9AT pinout, SMCJ17CA-M3/9AT application, or SMCJ17CA-M3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to divert surge energy away from protected circuitry. Its bidirectional structure ensures symmetrical clamping in both polarities, eliminating polarity dependency in AC-coupled or floating signal paths.
It delivers fast response time (<1 ps), low clamping ratio (VC/VBR ≈ 1.45), and thermal stability up to +150 °C junction temperature, with RθJA = 75 °C/W enabling operation without heatsinking under typical PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected line. |
| VBR min/max | 18.9 V / 20.9 V at 1 mA - Verified breakdown threshold ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 27.6 V at 54.3 A - Clamping voltage under 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports high-energy transients per ISO 7637-2 Pulse 5a/b or IEC 61000-4-5 Level 4. |
| IPPM | 54.3 A - Peak surge current capability at rated clamping voltage; enables protection against 100 A system-level surges with margin. |
| TJ max | +150 °C - Maximum junction temperature rating; allows reliable operation in under-hood automotive or enclosed industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT reflow profiles. |
Pinout & Package
SMCJ17CA-M3/9AT uses the SMC (DO-214AB) package: a two-terminal surface-mount device with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive half-cycle) | Accepts surge current during positive voltage excursions; forms one side of symmetrical avalanche path. |
| Cathode | Transient current entry point (negative half-cycle) | Accepts surge current during negative voltage excursions; completes bidirectional clamping loop with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power domains without polarity concerns. |
| 1500 W peak pulse power | Withstands high-energy transients such as load dump (ISO 16750-2) or lightning-induced surges (IEC 61000-4-5) without degradation. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial end equipment; supports lead-free reflow assembly. |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT handling without dry-pack or baking-reducing manufacturing overhead. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, improving margin for 3.3 V or 5 V logic interfaces downstream. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Installed across 12 V battery feed to body control module (BCM) to suppress load dump transients up to 35 V. IC Role / Device Role / Timing Role: Voltage-clamping TVS diode providing instantaneous shunt path for surge energy, protecting LDO regulators and microcontroller power pins. Use Value: Limits peak rail voltage to ≤27.6 V during ISO 16750-2 Pulse 5a (35 V, 400 ms), preventing brownout or latch-up in downstream ICs. | Use Scenario: Placed on analog input lines of a pressure sensor connected to PLC analog input card in factory automation. IC Role / Device Role / Timing Role: Bidirectional transient suppressor guarding against ESD events (IEC 61000-4-2 ±8 kV contact) and inductive switching noise from nearby solenoids. Use Value: Clamps fast-rising transients within <1 ps while maintaining <1 µA leakage at 17 V, preserving sensor accuracy and ADC resolution. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Protection |
Use Scenario: Mounted on tip/ring lines of POTS interface in VoIP gateway to withstand lightning-induced surges per IEC 61000-4-5 Level 4 (4 kV line-earth). IC Role / Device Role / Timing Role: Primary overvoltage protector in series with gas discharge tube (GDT) front-end, absorbing residual energy after GDT fires. Use Value: Delivers 1500 W pulse handling with 27.6 V clamping, ensuring protected line stays below 30 V during combined surge events. | Use Scenario: Applied across VBUS and D+/D− lines of USB 2.0 host port in smart home hub to meet USB-IF ESD compliance. IC Role / Device Role / Timing Role: Bidirectional TVS array element (used per-line) suppressing ±15 kV air/±8 kV contact ESD per IEC 61000-4-2. Use Value: Provides sub-1 ns response and <1 µA leakage at 17 V, avoiding signal integrity impact while meeting full USB 2.0 eye diagram specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-M3/57T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC ratings. | Reduced surge energy handling; suitable only for lower-risk environments (e.g., consumer USB ports vs. automotive power rails). | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD or low-energy inductive spikes. |
| SMCJ17A-M3/9AT | Unidirectional version; identical VWM, VBR, VC, and PPPM, but cathode band marking required for correct orientation. | Requires polarity-aware layout; unsuitable for AC or floating nodes where voltage polarity reverses. | Choose only for DC-biased lines with known fixed polarity (e.g., 5 V supply rail with ground reference). |
Compared with SMCJ17CA-M3/9AT, SMBJ17CA-M3/57T trades surge robustness for compactness, while SMCJ17A-M3/9AT sacrifices bidirectionality for marginally lower cost-neither offers pin-compatible replacement without layout or system-level validation.
Availability
SMCJ17CA-M3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom line cards, and consumer USB interface designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ17CA-M3/9AT 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, power efficiency, and automotive qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against load dump, ESD, and lightning surges is mission-critical.
FAQ
What does the "CA" suffix indicate in SMCJ17CA-M3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning SMCJ17CA-M3/9AT provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMCJ17A), it has no polarity marking and can be placed without orientation concern-critical for AC-coupled or floating signal lines where voltage polarity may reverse.
Is SMCJ17CA-M3/9AT qualified for automotive use?
SMCJ17CA-M3/9AT itself is not AEC-Q101 qualified; it carries the commercial-grade M3 suffix (halogen-free, RoHS-compliant). For automotive applications requiring AEC-Q101, the equivalent part is SMCJ17CAHM3_A/I, which adds AEC-Q101 qualification while retaining identical electrical specs and SMC package. Always verify qualification status via Vishay's official ordering codes.
What is the maximum clamping voltage of SMCJ17CA-M3/9AT under surge conditions?
The maximum clamping voltage (VC) of SMCJ17CA-M3/9AT is 27.6 V when subjected to its rated peak pulse current of 54.3 A using the standard 10/1000 µs waveform. This value is guaranteed across temperature and production lot, defining the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SMCJ17CA-M3/9AT be used in place of a unidirectional TVS like SMCJ17A-M3/9AT?
Yes, SMCJ17CA-M3/9AT can replace SMCJ17A-M3/9AT in most applications-but only if polarity independence is acceptable or required. The bidirectional version eliminates orientation constraints and supports AC or floating nodes, though it costs slightly more. No PCB changes are needed since both share identical SMC (DO-214AB) footprint and thermal characteristics.
What is the thermal resistance of SMCJ17CA-M3/9AT, and how does it affect layout?
SMCJ17CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This means a 1 W steady-state dissipation raises junction temperature by ~75 °C above ambient-so layout must provide adequate copper area and avoid thermal isolation to prevent exceeding the +150 °C TJ max rating during repeated surges.
SMCJ17CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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 (SMC)
SMCJ17CA-M3/9AT FAQ
1.How can I place an order for SMCJ17CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CA-M3/9AT 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 SMCJ17CA-M3/9AT reliable?
The price and inventory of SMCJ17CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ17CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CA-M3/9AT?
SMCJ17CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CA-M3/9AT 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 SMCJ17CA-M3/9AT?
For technical support, including SMCJ17CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ17CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ17CA-M3/9AT 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 SMCJ17CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ17CA-M3/9AT?
All SMCJ17CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CA-M3/9AT, 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 SMCJ17CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ17CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17CA-M3/9AT Tags
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