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Taiwan Semiconductor Corporation SMCJ17A
- Part No.:
- SMCJ17A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17A.pdf
- Description:
- TVS DIODE 17VWM 27.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,798
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Product details
Overview
SMCJ17A from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a 17V working stand-off voltage (VWM), 18.9–20.9V breakdown voltage (VBR), and 27.6V maximum clamping voltage (VC) at 57A peak pulse current. It features glass passivated junction, <1.0ps response time, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive switching protection.
For engineers reviewing the SMCJ17A datasheet, SMCJ17A pinout, SMCJ17A application, or SMCJ17A equivalent, key selection criteria include clamping performance under 10/1000μs surge, unidirectional polarity marking, DO-214AB (SMC) package thermal resistance (RθJC = 10°C/W), and compliance with JESD201 Class 2 whisker testing and RoHS/halogen-free requirements.
Technical Context
The SMCJ17A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (18.9–20.9V at 1mA test current). Its fast <1.0ps response enables suppression of ESD and electrical fast transients before downstream IC damage occurs.
Designed for automotive and industrial systems, it handles 1500W peak pulse power (1ms, 10/1000μs waveform), supports 200A non-repetitive forward surge (8.3ms half-sine), and maintains leakage <1μA above 10V - critical for low-power sensor and microcontroller I/O line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 18.9 / 20.9 V @ 1 mA - Ensures reliable turn-on margin above VWM to avoid false triggering |
| VC @ IPPM | 27.6 V @ 57 A - Clamping voltage during 10/1000μs surge; limits stress on protected ICs |
| PPK | 1500 W - Peak pulse power handling per ISO 7637-2 Pulse 5a (load dump) |
| RθJC | 10 °C/W - Enables effective heat transfer to PCB copper during repetitive surges |
| IR @ VWM | <1 μA - Negligible leakage at operating voltage, preserving battery life in always-on circuits |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode band marked on case. Moisture sensitivity level 1 (J-STD-020), matte tin-plated leads, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or low-side return in unidirectional configuration |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., CAN_H, LIN, sensor supply); cathode band identifies polarity |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity |
| ISO 7637-2 compliance | Validated for automotive Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (transient noise) |
| Fast response time <1.0 ps | Clamps ESD events before propagation into sensitive analog or digital inputs |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V power rails in body control modules from load-dump transients up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused battery input and DC-DC converter input. Use Value: Limits clamped voltage to 27.6V, preventing overvoltage damage to 36V-rated input stages while surviving 1500W pulses. | Use Scenario: Safeguarding analog output lines (e.g., 4–20mA transmitter) against EFT bursts in factory automation PLCs. IC Role / Device Role / Timing Role: TVS connected across signal and ground, directly at connector entry point. Use Value: Sub-1ps response ensures clamping before EFT edge reaches op-amp input, maintaining signal integrity and measurement accuracy. |
| LED Driver Overvoltage Suppression | Microcontroller I/O Port ESD Protection |
Use Scenario: Shielding constant-current LED driver ICs from inductive kickback during MOSFET switching in automotive lighting. IC Role / Device Role / Timing Role: TVS placed across driver output terminals, parallel to LED string. Use Value: 200A IFSM rating withstands repeated inductive surges; 27.6V VC prevents latch-up in driver ICs rated for ≤30V absolute max. | Use Scenario: Adding board-level ESD immunity to UART, SPI, or GPIO pins exposed on external connectors. IC Role / Device Role / Timing Role: Unidirectional TVS mounted adjacent to MCU pin, with short trace to ground plane. Use Value: <1μA IR preserves low-power sleep current; DO-214AB footprint allows placement within 5mm of I/O pad for optimal high-frequency ESD shunting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A (Bourns) | Same DO-214AA (SMB) package; 600W PPK vs. SMCJ17A's 1500W; higher RθJA (75°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select SMBJ17A only for space-constrained designs where surge energy is ≤600W and thermal budget permits higher junction rise |
| 1.5SMC17A (ON Semiconductor) | Identical DO-214AB (SMC) package and 1500W rating; VBR min = 18.9V, VC = 27.6V - functionally identical clamping behavior | No functional difference; validated for same automotive and industrial standards | 1.5SMC17A is a direct form-fit-function alternative with equivalent surge capability and thermal performance |
Compared with SMBJ17A, SMCJ17A delivers 2.5× higher surge power handling and superior thermal dissipation; versus 1.5SMC17A, it offers identical protection specs but differs in manufacturer qualification and traceability documentation for OEM programs.
Availability
SMCJ17A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver overvoltage suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ17A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with ISO/TS 16949 certification for automotive-grade products.
The SMCJ series was designed specifically for high-energy transient suppression in 12V/24V automotive and heavy-industrial environments, emphasizing robustness under ISO 7637-2 and AEC-Q101 stress conditions.
FAQ
What is the maximum clamping voltage of SMCJ17A under standard 10/1000μs surge conditions?
The SMCJ17A has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current of 57 A, defined by the 10/1000μs waveform per IEC 61000-4-5 and ISO 7637-2. This value is measured at TA = 25°C and ensures protected circuitry remains below safe voltage thresholds during transient events. The SMCJ17A datasheet specifies this parameter in the Electrical Specifications table under "Maximum clamping voltage VC@IPPM".
Is SMCJ17A suitable for bidirectional transient protection?
No, SMCJ17A is a unidirectional TVS diode intended for DC-biased lines such as power rails or signal lines referenced to ground. For bidirectional protection (e.g., AC lines or data buses like RS-485), the CA-suffixed variant SMCJ17CA must be used. The SMCJ17A's cathode band marking and single-diode construction confirm its unidirectional functionality, and its electrical characteristics are not symmetric in reverse conduction.
What is the thermal resistance from junction to case (RθJC) for SMCJ17A, and why does it matter?
The SMCJ17A has a junction-to-case thermal resistance (RθJC) of 10°C/W, as specified in the Thermal Performance section of the Taiwan Semiconductor datasheet. This low value enables efficient heat transfer from the silicon die to the PCB copper via the cathode and anode leads, critical for sustaining repetitive surge events without exceeding the 150°C maximum junction temperature. Proper thermal pad design directly impacts SMCJ17A's real-world surge endurance.
Does SMCJ17A meet automotive industry surge immunity standards?
Yes, SMCJ17A is explicitly rated to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupled noise). Its 1500W peak power rating and clamping performance align with Pulse 5a (load dump) requirements when applied with appropriate system-level filtering. Taiwan Semiconductor validates these capabilities per AEC-Q101 stress test conditions.
What is the moisture sensitivity level (MSL) and reflow profile compatibility for SMCJ17A?
The SMCJ17A has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not moisture-sensitive and can be stored indefinitely at ambient conditions without dry-pack requirements. It supports standard lead-free reflow profiles (peak temperature ≤260°C), with matte tin-plated leads compliant to J-STD-002 for solderability. This simplifies SMT assembly and eliminates bake-out steps prior to reflow - a key advantage for high-volume SMCJ17A deployment.
SMCJ17A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ17A FAQ
1.How can I place an order for SMCJ17A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17A 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 reliable?
The price and inventory of SMCJ17A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17A is usually 5 days.
3.What payment methods are accepted for SMCJ17A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17A?
SMCJ17A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17A 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?
For technical support, including SMCJ17A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17A requirements.
6.How does Aetrix verify that SMCJ17A is sourced from the original manufacturer or authorized distributors?
All SMCJ17A 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 meets industry standards.
7.What is the process for return or replacement of SMCJ17A?
All SMCJ17A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17A, 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 part is unused and in its original packaging.
Return procedure for SMCJ17A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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