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Vishay General Semiconductor - Diodes Division SMCJ17A-E3/9AT
- Part No.:
- SMCJ17A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17A-E3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,704
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Product details
Overview
SMCJ17A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount 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), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 54.3 A peak pulse current (IPPM), and clamps transients to ≤27.6 V. It is widely deployed in automotive power line protection and industrial sensor interface circuits.
For engineers reviewing the SMCJ17A-E3/9AT datasheet, SMCJ17A-E3/9AT pinout, SMCJ17A-E3/9AT application, or SMCJ17A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 1500 W surge rating, 27.6 V clamping voltage at rated IPPM, RoHS-compliant matte tin terminations, and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
The SMCJ17A-E3/9AT uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient events such as ESD, lightning-induced surges, and inductive switching spikes. Its low incremental surge resistance ensures stable clamping under high-current stress, while its MSL Level 1 rating supports lead-free reflow up to 260 °C.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device operates with ≤1.0 µA reverse leakage at VWM and maintains clamping stability across -55 °C to +150 °C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 18.9 V / 20.9 V at IT = 1 mA - Confirmed breakdown threshold for reliable turn-on margin |
| VC @ IPPM | ≤27.6 V at IPPM = 54.3 A - Clamping voltage limiting downstream circuit stress during 10/1000 µs surge |
| PPPM | 1500 W - Peak pulse power handling capability per standard 10/1000 µs waveform |
| ID @ VWM | ≤1.0 µA - Low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Maximum junction temperature supporting under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
SMCJ17A-E3/9AT is housed in an SMC (DO-214AB) package with two terminals: cathode marked by a band on the body, and anode unmarked. The package is optimized for automated placement and meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when V > VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping loop during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without failure |
| ≤27.6 V clamping voltage | Limits voltage stress on downstream 3.3 V or 5 V logic, MOSFET gates, and sensor ICs |
| Glass-passivated junction | Ensures long-term reliability and stable VBR over temperature and lifetime cycling |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges. Use Value: Withstands 1500 W pulses and clamps to ≤27.6 V, preventing damage to voltage regulators and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS shunting transients on signal lines before they reach ADC inputs. Use Value: Maintains signal fidelity with minimal DC loading while responding in <1 ns to sub-100 ns ESD pulses. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Protection |
|
Use Scenario: Safeguarding PoE-powered equipment input stages from induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input rail, coordinated with upstream current limiting. Use Value: 17 V VWM aligns with 48 V nominal systems using 3:1 derating; 27.6 V VC prevents latch-up in DC/DC controllers. |
Use Scenario: Adding secondary-side surge immunity to USB-C PD adapters before connector output. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5–20 V output, absorbing hot-plug and short-circuit transients. Use Value: Compact SMC footprint enables placement near USB-C port; 1500 W rating exceeds IEC 61000-4-5 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC17A-TB-E3/9AT | Same VWM (17 V), lower PPPM (600 W), higher VC (32.4 V), smaller SMA package | Lower surge capacity suits consumer-grade, non-automotive designs with less stringent IEC 61000-4-5 requirements | Select when board space is constrained and 600 W surge rating suffices; not suitable for AEC-Q101 or 1500 W needs |
| SMCJ17CA-E3/9AT | Bidirectional variant; identical VWM (17 V), VBR, and PPPM but symmetrical clamping in both polarities | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) where negative transients occur | Choose only if bidirectional protection is mandatory; unidirectional SMCJ17A-E3/9AT offers better cost and layout simplicity for DC rails |
Compared with SAC17A-TB-E3/9AT and SMCJ17CA-E3/9AT, the SMCJ17A-E3/9AT delivers optimal balance of high-power unidirectional clamping, automotive-grade thermal robustness, and industry-standard SMC footprint-making it preferred for 12 V/24 V DC power rail protection where polarity is fixed and surge severity is high.
Availability
SMCJ17A-E3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom power supply designs requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMCJ17A-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 was developed for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 qualification are critical design requirements.
FAQ
What is the clamping voltage of SMCJ17A-E3/9AT at its rated peak pulse current?
The SMCJ17A-E3/9AT clamps to a maximum of 27.6 V when subjected to its rated peak pulse current of 54.3 A under the standard 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ17A-E3/9AT maintains this clamping performance across its specified operating temperature range.
Is SMCJ17A-E3/9AT RoHS-compliant and lead-free assembly compatible?
Yes, the SMCJ17A-E3/9AT carries the "E3" suffix indicating full RoHS compliance and compatibility with lead-free reflow soldering processes up to 260 °C peak temperature. Its matte tin-plated leads meet J-STD-002 solderability standards and JESD 201 Class 2 whisker resistance requirements. The SMCJ17A-E3/9AT is qualified to MSL Level 1, eliminating bake requirements prior to assembly.
How does the breakdown voltage tolerance of SMCJ17A-E3/9AT affect circuit design?
The SMCJ17A-E3/9AT has a guaranteed breakdown voltage range of 18.9 V to 20.9 V at 1 mA test current, providing a minimum 1.9 V design margin above its 17 V standoff voltage. This ensures reliable turn-on only during overvoltage events-not during normal operation-and accommodates manufacturing variation while maintaining compatibility with 24 V system tolerances. Designers use this window to set upstream overvoltage lockout thresholds.
Can SMCJ17A-E3/9AT be used in bidirectional signal protection applications?
No, the SMCJ17A-E3/9AT is a unidirectional TVS diode and must not be used for bidirectional signal lines such as RS-485 or CAN, where negative transients occur. For those applications, the bidirectional variant SMCJ17CA-E3/9AT is specified-with identical VWM, VBR, and PPPM ratings but symmetrical clamping behavior. Using the unidirectional SMCJ17A-E3/9AT in such roles risks forward conduction and permanent damage during negative excursions.
What thermal derating applies to SMCJ17A-E3/9AT above 25 °C ambient?
The SMCJ17A-E3/9AT requires linear derating of its peak pulse power capability above TA = 25 °C, following the curve in Figure 2 of its datasheet. At 85 °C ambient, its 1500 W rating reduces to approximately 1050 W; at 125 °C, it falls to ~680 W. This derating is driven by junction temperature limits (TJ max = 150 °C) and the device's RθJA of 75 °C/W. Layout with 8.0 mm × 8.0 mm copper pads per terminal is required to achieve published ratings.
SMCJ17A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ17A-E3/9AT FAQ
1.How can I place an order for SMCJ17A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17A-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 SMCJ17A-E3/9AT reliable?
The price and inventory of SMCJ17A-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 SMCJ17A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ17A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17A-E3/9AT?
SMCJ17A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17A-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 SMCJ17A-E3/9AT?
For technical support, including SMCJ17A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ17A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ17A-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 SMCJ17A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ17A-E3/9AT?
All SMCJ17A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17A-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 SMCJ17A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ17A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17A-E3/9AT Tags
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