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Vishay General Semiconductor - Diodes Division SMCJ17-E3/9AT
- Part No.:
- SMCJ17-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17-E3/9AT.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,181
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Product details
Overview
SMCJ17-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) 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, 27.6 V clamping voltage (VC) at 54.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ17-E3/9AT datasheet, SMCJ17-E3/9AT pinout, SMCJ17-E3/9AT application, or SMCJ17-E3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C maximum junction temperature, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ17-E3/9AT operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its VBR range (18.9–20.9 V), limiting transient energy by clamping to ≤27.6 V at 54.3 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at 17 V) and fast response time (<1.0 ps), critical for suppressing ESD and load-switching spikes.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to 150 °C junction temperature. The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
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 1 mA - precise avalanche onset range defining protection threshold |
| VC @ IPPM | 27.6 V at 54.3 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient power absorption capability under standardized surge waveform |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in low-power systems |
| TJ max. | +150 °C - enables deployment in under-hood automotive and high-temperature industrial environments |
| Package | DO-214AB (SMCJ) - surface-mount outline with cathode band marking, optimized for automated assembly |
Pinout & Package
SMCJ17-E3/9AT uses the DO-214AB (SMCJ) package: molded plastic case with J-bend leads, 0.320" body length, 0.220–0.246" width, and cathode band marking on one end. Terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102, with whisker resistance per JESD 201 Class 1A (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail or CAN-H); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power supplies |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| MSL Level 1 rating | Enables standard reflow soldering without pre-baking, reducing manufacturing cost and process complexity |
| RoHS-compliant & halogen-free | Meets JEDEC JS709A and EU Directive 2011/65/EU requirements for environmentally constrained markets |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units (ECUs) against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges within 100 ns. Use Value: Limits peak voltage to ≤27.6 V, preventing damage to 36 V-rated buck converters and microcontrollers. | Use Scenario: Shielding analog sensor inputs (e.g., current shunt amplifiers) in variable-frequency drives from switching noise and inductive kickback. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, shunting transients before reaching op-amp front-end. Use Value: 1.0 µA leakage at 17 V avoids DC offset errors; 1500 W rating absorbs repetitive 500 V/10 A spikes. |
| Telecom Line Interface Protection | Consumer Device USB Power Input Protection |
Use Scenario: Safeguarding Ethernet PHY power pins (3.3 V or 5 V) in PoE-powered switches against lightning-induced surges on upstream cabling. IC Role / Device Role / Timing Role: Unidirectional clamp on VDD line, coordinated with common-mode chokes and gas discharge tubes. Use Value: 27.6 V clamping ensures compliance with IEC 61000-4-5 Level 4 (4 kV) while preserving 5 V regulator headroom. | Use Scenario: Hardening 5 V USB Type-A port inputs in smart home hubs against ESD (IEC 61000-4-2 ±15 kV contact) and hot-plug voltage overshoot. IC Role / Device Role / Timing Role: First-line TVS on VBUS line, placed adjacent to connector with minimal trace inductance. Use Value: Sub-nanosecond response and 1.0 µA leakage prevent false resets and battery drain in always-on devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not AEC-Q101 qualified; suitable only for consumer-grade, low-energy transients | Select when board space is constrained and surge energy is <50% of SMCJ17-E3/9AT's rating |
| SMCJ17AHE3/9AT | Identical electrical specs but AEC-Q101 qualified version (HE3 suffix); same DO-214AB package and marking | Approved for automotive safety-critical modules requiring full PPAP documentation | Choose for Tier 1 automotive designs where qualification traceability is mandatory |
Compared with SMAJ17A-E3/61T and SMCJ17AHE3/9AT, the SMCJ17-E3/9AT offers optimal balance of 1500 W surge capacity, AEC-Q101 readiness, and industrial-grade thermal performance - making it preferred for high-reliability 12 V/24 V systems where sustained surge immunity matters more than footprint minimization.
Availability
SMCJ17-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom infrastructure projects requiring stable component supply across multi-year production cycles.
Supply support for SMCJ17-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 automotive qualification.
The SMCJ series belongs to Vishay's TRANSZORB® transient voltage suppressor family, engineered specifically for high-energy surge immunity in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 150 °C operation.
FAQ
What is the clamping voltage of SMCJ17-E3/9AT and how is it measured?
The SMCJ17-E3/9AT has a maximum clamping voltage (VC) of 27.6 V, measured at a peak pulse current (IPPM) of 54.3 A using the standardized 10/1000 µs double-exponential surge waveform. This value represents the upper voltage limit imposed on the protected circuit during worst-case transient events, ensuring downstream components like microcontrollers or regulators remain within safe operating limits. The test condition is defined in ANSI/IEEE C62.35 and verified per Vishay Document Number 88394.
Is SMCJ17-E3/9AT suitable for automotive applications?
Yes, SMCJ17-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor power supplies. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and glass-passivated junction meet stringent automotive reliability requirements. While not the HE3-suffixed variant, the E3 version shares identical electrical and thermal specs and is widely deployed in non-safety-critical automotive subsystems.
What does the "E3/9AT" suffix mean in SMCJ17-E3/9AT?
The "E3" suffix indicates RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance. The "9AT" denotes packaging in 13-inch diameter plastic tape and reel, containing 3500 units per reel - optimized for high-volume SMT assembly. This differs from "57T" (7-inch reel, 850 units) and "HE3" (AEC-Q101 qualified version), but all share identical die and electrical characteristics.
How does SMCJ17-E3/9AT compare to bi-directional TVS diodes like SMCJ17CA?
The SMCJ17-E3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering lower leakage (<1.0 µA) and no ambiguity in cathode orientation. In contrast, SMCJ17CA is bi-directional, suited for AC or floating signal lines (e.g., RS-485, CAN), but exhibits higher leakage (up to 2.0 µA) and lacks polarity marking. Selection depends strictly on circuit topology - SMCJ17-E3/9AT must not be substituted for SMCJ17CA without verifying unidirectional biasing.
What PCB layout practices maximize SMCJ17-E3/9AT performance?
To maximize SMCJ17-E3/9AT performance, mount it with minimum trace length between the protected line and ground plane, using 8.0 mm × 8.0 mm copper pads per terminal as specified in Vishay's recommended layout. Avoid vias in high-current paths; place the device adjacent to the connector or IC input. Ensure thermal relief is minimized on cathode/anode pads to maintain low RθJA, and verify clearance distances meet IPC-2221 creepage requirements for the system's working voltage.
SMCJ17-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 49.2A
- 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)
SMCJ17-E3/9AT FAQ
1.How can I place an order for SMCJ17-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17-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 SMCJ17-E3/9AT reliable?
The price and inventory of SMCJ17-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 SMCJ17-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ17-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17-E3/9AT?
SMCJ17-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17-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 SMCJ17-E3/9AT?
For technical support, including SMCJ17-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17-E3/9AT requirements.
6.How does Aetrix verify that SMCJ17-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ17-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 SMCJ17-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ17-E3/9AT?
All SMCJ17-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17-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 SMCJ17-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ17-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17-E3/9AT Tags
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