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Vishay General Semiconductor - Diodes Division SMCJ17AHE3/57T
- Part No.:
- SMCJ17AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17AHE3/57T.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,941
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Product details
Overview
SMCJ17AHE3/57T 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), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 27.6 V clamping voltage (VC) at 54.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in automotive and industrial systems.
For engineers reviewing the SMCJ17AHE3/57T datasheet, SMCJ17AHE3/57T pinout, SMCJ17AHE3/57T application, or SMCJ17AHE3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, and thermal resistance (RθJA = 75 °C/W) for board-level thermal design.
Technical Context
The SMCJ17AHE3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response to voltage transients. Its unidirectional configuration uses cathode-band marking and exhibits low incremental surge resistance and stable clamping behavior up to 150 °C junction temperature.
Designed per ANSI/IEEE C62.35, it meets MSL Level 1 per J-STD-020 (260 °C reflow peak), supports automated SMT placement, and is qualified to AEC-Q101 for automotive applications - confirmed by HE3 suffix and Vishay's documentation.
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 - guaranteed avalanche breakdown range defining turn-on threshold |
| VC @ IPPM | 27.6 V at 54.3 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| TJ max. | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
| Polarity | Unidirectional - cathode marked with band; blocks forward current until breakdown, conducts only in reverse surge |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts transient energy to ground when V > VBR |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and surge endurance |
| Glass-passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
| MSL Level 1 compliance | Enables standard Pb-free reflow without pre-baking; peak temperature tolerance up to 260 °C |
| 1500 W peak pulse power | Supports high-energy transient suppression in 12 V/24 V vehicle power nets and industrial I/O lines |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping surges within 1 ns. Use Value: Limits voltage to ≤27.6 V during 54.3 A surge, preventing damage to 36 V-rated DC-DC controllers and CAN transceivers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD and cable discharge events. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to safe levels while maintaining <1 µA leakage at 17 V, preserving signal integrity. |
| Motor Drive Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding high-side MOSFET gate drivers in BLDC inverters from inductive kickback. IC Role / Device Role / Timing Role: TVS across driver supply rails (VDD-GND) to clamp cross-conduction spikes. Use Value: Absorbs 1500 W pulses without degradation, ensuring gate oxide integrity and preventing false turn-on. |
Use Scenario: Front-end protection of 48 V telecom rectifier inputs exposed to lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary clamping device in series with upstream fuse and MOV stack. Use Value: Provides precise 27.6 V clamping with tight VBR tolerance, reducing let-through energy to downstream DC/DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC17A-TB-E3 | Same VWM (17 V) and PPPM (1500 W), but SOD-123FL package (smaller footprint, lower IPC) | Limited to lower-energy transients due to higher RθJA (~125 °C/W); unsuitable for sustained surge duty cycles | Select when board space is constrained and thermal mass is limited; verify layout copper area meets derating curves. |
| 1.5SMC17A | Identical electrical specs and SMC package, but commercial-grade (no AEC-Q101 qualification) | Not approved for automotive use; lacks extended temperature validation and lifetime test data per AEC-Q101 | Acceptable for industrial or consumer designs where automotive qualification is not required. |
Compared with SAC17A-TB-E3 and 1.5SMC17A, the SMCJ17AHE3/57T uniquely combines AEC-Q101 qualification, SMC package thermal performance (RθJA = 75 °C/W), and production traceability for automotive OEM programs - making it the preferred choice where functional safety and supply chain continuity are mandated.
Availability
SMCJ17AHE3/57T is available at Aetrix Electronics and suitable for automotive control units, industrial sensor nodes, and telecom power supplies requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMCJ17AHE3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where robustness, repeatable clamping, and qualification compliance are non-negotiable.
FAQ
What is the clamping voltage of the SMCJ17AHE3/57T under a 10/1000 µs surge?
The SMCJ17AHE3/57T has a maximum clamping voltage (VC) of 27.6 V at 54.3 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMCJ17AHE3/57T maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), with minimal variation due to its low VBR temperature coefficient (0.090 %/°C).
Is the SMCJ17AHE3/57T qualified for automotive applications?
Yes, the SMCJ17AHE3/57T is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and Vishay's official documentation. It undergoes rigorous testing for temperature cycling, mechanical shock, humidity, and surge endurance per AEC-Q101 requirements. This qualification makes the SMCJ17AHE3/57T suitable for use in engine control units, body electronics, and ADAS modules where automotive-grade reliability is mandatory.
What does the "57T" suffix indicate in SMCJ17AHE3/57T?
The "57T" suffix denotes the packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 devices per reel. This format is optimized for high-speed automated SMT placement. The "HE3" portion confirms RoHS-compliance and AEC-Q101 qualification, while "57T" specifies the physical logistics and handling method - distinct from "9AT" (13-inch reel, 3500 units) or "H"/"I" variants used in different tape widths or carrier types.
How does the SMCJ17AHE3/57T differ from bidirectional SMCJ17CA variants?
The SMCJ17AHE3/57T is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, SMCJ17CA is bidirectional, symmetrical in both directions, and used in AC-coupled or floating signal lines. The SMCJ17AHE3/57T has a forward voltage drop (~3.5 V at 100 A) and is not rated for reverse conduction; using it in place of a bidirectional device would leave one polarity unprotected.
What is the thermal resistance and how does it affect PCB layout for the SMCJ17AHE3/57T?
The SMCJ17AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" x 0.31" (8.0 mm x 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, PCB layout must provide adequate copper area and thermal vias - especially for applications exceeding 25 °C ambient. Derating curves in the Vishay datasheet (Fig. 2) require adjusting IPPM based on actual board thermal performance; insufficient copper increases RθJA and risks thermal runaway during multi-pulse events.
SMCJ17AHE3/57T 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)
SMCJ17AHE3/57T FAQ
1.How can I place an order for SMCJ17AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17AHE3/57T 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 SMCJ17AHE3/57T reliable?
The price and inventory of SMCJ17AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ17AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17AHE3/57T?
SMCJ17AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17AHE3/57T 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 SMCJ17AHE3/57T?
For technical support, including SMCJ17AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17AHE3/57T requirements.
6.How does Aetrix verify that SMCJ17AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ17AHE3/57T 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 SMCJ17AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ17AHE3/57T?
All SMCJ17AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17AHE3/57T, 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 SMCJ17AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ17AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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