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Vishay General Semiconductor - Diodes Division SMCJ17AHE3/9AT
- Part No.:
- SMCJ17AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17AHE3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,493
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Product details
Overview
SMCJ17AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 17 V standoff voltage (VWM), 27.6 V clamping voltage (VC) at 54.3 A peak pulse current, and 1500 W peak pulse power rating with a 10/1000 µs waveform - deployed in automotive ECUs, industrial motor drives, and DC power input stages.
For engineers reviewing the SMCJ17AHE3/9AT datasheet, SMCJ17AHE3/9AT pinout, SMCJ17AHE3/9AT application, or SMCJ17AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, DO-214AB (SMC) package compatibility, and verified clamping performance under IEC 61000-4-5 surge conditions.
Technical Context
This TVS diode operates as a clamping-type surge protector, leveraging an avalanche breakdown mechanism to limit transient voltages before they damage downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while its MSL Level 1 rating supports lead-free reflow without popcorn cracking.
The device is optimized for fast response (<1 ps typical), low incremental surge resistance, and thermal stability up to +150 °C junction temperature. Its 75 °C/W junction-to-ambient thermal resistance requires appropriate PCB copper pad area (8.0 mm × 8.0 mm per terminal) to sustain repetitive surge events.
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 1.0 mA - guaranteed breakdown onset range for reliable triggering |
| VC @ IPPM | 27.6 V at 54.3 A - clamped voltage during full 1500 W surge, limiting stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform per IEC 61000-4-5 |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), critical for inductive switch-off events |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Leakage ID | ≤1.0 µA at VWM - minimal standby power loss and no false triggering in low-power sensor interfaces |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to protected line ground or low-side return path; enables conduction during negative transients only when used in bidirectional configurations with external components |
| Cathode | Reverse-biased terminal (marked with band) | Connected to the line being protected (e.g., 12 V rail); conducts avalanche current to ground during positive overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| Glass passivated junction | Ensures consistent VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving system-level ESD/surge margin |
| MSL Level 1, 260 °C peak reflow | Enables standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
Applications
| Automotive Power Input Protection | Industrial DC Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges above 27.6 V. Use Value: Prevents damage to LDOs and microcontrollers during 35 V/100 ms load dump events without derating or parallel staging. | Use Scenario: Safeguarding H-bridge gate drivers from inductive kickback during motor commutation. IC Role / Device Role / Timing Role: Mounted across DC bus rails to absorb flyback energy from motor windings. Use Value: Limits voltage spikes to ≤27.6 V, avoiding MOSFET avalanche failure and ensuring gate driver integrity. |
| Telecom DC Power Feeds | Consumer Power Adapter Outputs |
Use Scenario: Securing PoE-powered equipment inputs against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Installed on primary-side DC input of PoE PD controllers to meet IEC 61000-4-5 Level 4 immunity. Use Value: Clamps 4 kV/2 kA combination wave transients within spec-defined limits using single-device solution. | Use Scenario: Shielding USB-C PD and AC/DC adapter outputs from ESD and accidental overvoltage. IC Role / Device Role / Timing Role: Placed at output connector to suppress contact discharge (IEC 61000-4-2) and cable coupling transients. Use Value: Maintains <1 µA leakage at 17 V, preserving no-load efficiency while providing sub-30 V clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC specs | Not rated for AEC-Q101; limited to commercial-grade consumer/industrial use | Select when board space is constrained and surge energy is ≤400 W; not suitable for automotive under-hood deployment. |
| SMCJ17CAHE3/9AT | Bidirectional variant with identical VWM, VC, and PPPM but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal occurs (e.g., RS-485, CAN FD) | Choose for differential or bipolar signal protection; SMCJ17AHE3/9AT remains optimal for unidirectional DC rails. |
Compared with SMAJ17A-E3/61T and SMCJ17CAHE3/9AT, the SMCJ17AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and DO-214AB mechanical robustness - making it the preferred choice for high-energy, mission-critical DC power line protection in automotive and industrial systems.
Availability
SMCJ17AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drive power supplies, and telecom DC feed protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ17AHE3/9AT 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, precision, and automotive-grade qualification.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the clamping voltage of SMCJ17AHE3/9AT at its rated peak pulse current?
The SMCJ17AHE3/9AT has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 54.3 A, measured under the standardized 10/1000 µs waveform. This value is critical for determining whether downstream components like 3.3 V or 5 V regulators remain within safe operating limits during surge events. The SMCJ17AHE3/9AT achieves this clamping performance while maintaining low incremental resistance and thermal stability up to +150 °C junction temperature.
Is SMCJ17AHE3/9AT qualified for automotive applications?
Yes, the SMCJ17AHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood automotive modules such as body control units and ADAS power supplies. The SMCJ17AHE3/9AT meets these requirements in its standard SMC (DO-214AB) package with MSL Level 1 reflow capability.
What does the "9AT" suffix indicate in SMCJ17AHE3/9AT?
The "9AT" suffix in SMCJ17AHE3/9AT specifies the packaging configuration: 13-inch diameter plastic tape and reel, containing 3500 units per reel. This format supports high-volume automated SMT placement and is compatible with industry-standard pick-and-place equipment. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "9AT" distinguishes it from alternate reels like "57T" (7-inch, 850 units). No electrical or thermal differences exist between SMCJ17AHE3/9AT and other SMCJ17AHE3 variants - only packaging and reel size differ.
How does SMCJ17AHE3/9AT compare to bidirectional TVS diodes like SMCJ17CAHE3/9AT?
The SMCJ17AHE3/9AT is unidirectional, meaning it protects only against positive-going transients on a referenced line (e.g., 12 V rail to ground), with polarity marked by a cathode band. In contrast, SMCJ17CAHE3/9AT is bidirectional and clamps equally for both polarities - essential for AC signals or floating buses like CAN or RS-485. Both share identical VWM (17 V), VC (27.6 V), and PPPM (1500 W), but the SMCJ17AHE3/9AT offers lower capacitance and avoids unnecessary conduction during normal negative excursions, making it more efficient for DC power line protection.
What PCB layout guidance applies to SMCJ17AHE3/9AT for optimal thermal and surge performance?
For optimal performance, the SMCJ17AHE3/9AT must be mounted on minimum recommended copper pads: 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal, per Vishay's datasheet Figure 2 derating curves. These pads reduce thermal resistance (RθJA = 75 °C/W) and sustain repetitive surges. Short, wide traces minimize inductance that could elevate clamping voltage during fast transients. Avoid thermal relief spokes on pads; solid copper connections are required. The SMCJ17AHE3/9AT's DO-214AB footprint is standardized and supported by IPC-7351B land patterns.
SMCJ17AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ17AHE3/9AT FAQ
1.How can I place an order for SMCJ17AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17AHE3/9AT 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 SMCJ17AHE3/9AT reliable?
The price and inventory of SMCJ17AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ17AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17AHE3/9AT?
SMCJ17AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17AHE3/9AT 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 SMCJ17AHE3/9AT?
For technical support, including SMCJ17AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ17AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ17AHE3/9AT 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 SMCJ17AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ17AHE3/9AT?
All SMCJ17AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17AHE3/9AT, 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 SMCJ17AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ17AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17AHE3/9AT Tags
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