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Vishay General Semiconductor - Diodes Division SMCJ17CA-E3/9AT
- Part No.:
- SMCJ17CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CA-E3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,123
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Product details
Overview
SMCJ17CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, with 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR at 1 mA), and 1500 W peak pulse power rating (10/1000 µs waveform). It clamps transients to ≤27.6 V at 54.3 A and operates from –55 °C to +150 °C, used for protecting MOSFETs, ICs, and sensor signal lines against inductive switching surges.
For engineers reviewing the SMCJ17CA-E3/9AT datasheet, SMCJ17CA-E3/9AT pinout, SMCJ17CA-E3/9AT application, or SMCJ17CA-E3/9AT equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), RoHS-compliant matte tin terminations, and AEC-Q101 qualification path via HE3 suffix variants.
Technical Context
The SMCJ17CA-E3/9AT implements a glass-passivated silicon avalanche junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, supporting protection of AC-coupled or differential signal paths.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and JESD201 Class 2 whisker resistance. The device sustains non-repetitive 54.3 A surge current (10/1000 µs) while maintaining low incremental surge resistance and stable clamping under derated conditions above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 18.9 V / 20.9 V at 1 mA - Confirmed breakdown threshold range for bidirectional conduction |
| VC @ IPPM | 27.6 V at 54.3 A - Clamped voltage during full 1500 W transient, defining protected circuit stress limit |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform, critical for automotive load-dump immunity |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood or industrial enclosures |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads |
| Package | SMC (DO-214AB) - Industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMCJ17CA-E3/9AT uses a 2-terminal SMC (DO-214AB) package with no polarity marking-consistent with bidirectional functionality. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; symmetric with cathode in bidirectional mode |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; functionally identical to anode for CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V automotive systems |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| AEC-Q101 qualification path | HE3/HM3 suffix variants support automotive-grade reliability validation per stress test requirements |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontrollers connected to vehicle battery rails subject to load dump transients up to 40 V. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting rail excursions to ≤27.6 V during 10/1000 µs surges. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V automotive MCUs without requiring series impedance or directionality management. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Fast-response shunt element diverting inductive kick energy away from precision ADC front-ends. Use Value: Maintains signal integrity by clamping transients within 1 ns while adding <1 pF junction capacitance at 0 V bias. |
| Telecom Line Card Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Secondary protection on Ethernet PHY power rails (3.3 V, 5 V) in telecom access equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: High-power crowbar device absorbing residual energy after primary gas discharge tube (GDT) triggering. Use Value: Handles 1500 W pulses without degradation, ensuring system-level compliance with IEC 61000-4-5 Level 4 (4 kV line-earth). | Use Scenario: Board-level safeguard for USB 2.0 data lines and VBUS against human-body-model (HBM) ESD events per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to connector to minimize stub length. Use Value: Limits voltage to <27.6 V during 30 A contact discharge while contributing negligible signal distortion due to symmetric structure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC17CA | Same VWM (17 V), lower PPPM (600 W), smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for automotive load dump | Select when space-constrained layouts prioritize footprint over surge margin |
| SMCJ17A-E3/9AT | Unidirectional variant; includes cathode band marking; identical VBR, VC, and PPPM | Requires polarity-aware placement; used where DC-biased lines need asymmetric protection | Choose only when circuit topology mandates unidirectional clamping (e.g., DC power input with ground reference) |
Compared with SAC17CA and SMCJ17A-E3/9AT, the SMCJ17CA-E3/9AT uniquely provides bidirectional 1500 W surge capability in the robust SMC package-making it the sole choice for high-reliability AC-coupled or floating-rail protection where polarity independence and power handling are jointly required.
Availability
SMCJ17CA-E3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom line cards, and consumer USB port protection requiring stable component supply across production lifecycles.
Supply support for SMCJ17CA-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, power efficiency, and automotive-grade qualification.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications demanding >1000 W surge capability and AEC-Q101 readiness.
FAQ
What does the "CA" suffix indicate in SMCJ17CA-E3/9AT?
The "CA" suffix denotes a bidirectional configuration: the SMCJ17CA-E3/9AT conducts and clamps symmetrically for both positive and negative voltage transients, with no polarity marking on the SMC package. This differs from unidirectional "A" variants like SMCJ17A-E3/9AT, which require correct cathode orientation and only clamp in one direction. The CA version is essential for protecting AC signals, differential buses, or floating nodes.
Does SMCJ17CA-E3/9AT meet automotive qualification standards?
The base SMCJ17CA-E3/9AT is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes SMCJ17CAHE3_X (RoHS + AEC-Q101) and SMCJ17CAHM3_X (halogen-free + AEC-Q101). These variants undergo stress testing per AEC-Q101 Rev D and are intended for under-hood and safety-critical automotive subsystems. Always verify suffix and datasheet revision for qualification status.
What is the maximum clamping voltage of SMCJ17CA-E3/9AT under surge conditions?
The SMCJ17CA-E3/9AT clamps to a maximum of 27.6 V when subjected to its rated 54.3 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on 8 mm × 8 mm copper pads and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SMCJ17CA-E3/9AT be used in place of a unidirectional TVS like SMCJ17A-E3/9AT?
Yes, but only if the circuit is truly bidirectional or polarity-agnostic-such as AC-coupled signal lines, isolated power rails, or differential buses. Substituting SMCJ17CA-E3/9AT for SMCJ17A-E3/9AT on a DC-biased line may result in unintended conduction during normal operation. Always validate voltage polarity, bias conditions, and leakage requirements before interchange, as the CA variant has no cathode marking and identical VBR in both directions.
What PCB layout guidance applies to SMCJ17CA-E3/9AT for optimal thermal and electrical performance?
For optimal performance, mount SMCJ17CA-E3/9AT on minimum 8 mm × 8 mm copper pads per terminal as specified in Vishay's datasheet (Document 88394, Fig. 2). Use short, wide traces to minimize inductance; avoid vias in the main current path. Ensure ≥0.3 mm clearance to adjacent components and maintain solder mask defined pads to maximize thermal transfer. Do not reduce pad size-even for space-constrained designs-as undersized pads degrade surge current handling and thermal dissipation.
SMCJ17CA-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:
- 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 (SMCJ)
SMCJ17CA-E3/9AT FAQ
1.How can I place an order for SMCJ17CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CA-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 SMCJ17CA-E3/9AT reliable?
The price and inventory of SMCJ17CA-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 SMCJ17CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ17CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CA-E3/9AT?
SMCJ17CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CA-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 SMCJ17CA-E3/9AT?
For technical support, including SMCJ17CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ17CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ17CA-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 SMCJ17CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ17CA-E3/9AT?
All SMCJ17CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CA-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 SMCJ17CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ17CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17CA-E3/9AT Tags
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