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Taiwan Semiconductor Corporation SMCJ17CA
- Part No.:
- SMCJ17CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CA.pdf
- Description:
- TVS DIODE 17VWM 27.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,626
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Product details
Overview
SMCJ17CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 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 - designed for automotive ESD and load-dump protection in power supply rails and CAN/LIN interfaces.
For engineers reviewing the SMCJ17CA datasheet, SMCJ17CA pinout, SMCJ17CA application, or SMCJ17CA equivalent, key selection factors include its ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1.0ps response time, <1μA reverse leakage above 10V, bidirectional symmetry, and DO-214AB thermal performance (RθJA = 55°C/W).
Technical Context
The SMCJ17CA is a glass-passivated, single-die, bidirectional TVS diode optimized for high-energy transient suppression in automotive and industrial DC power systems. It operates symmetrically in both polarities, with clamping action triggered when reverse or forward voltage exceeds VBR (18.9–20.9V), limiting surge energy to ≤27.6V at 57A (10/1000μs waveform).
Its junction temperature range spans –55°C to +150°C, and it meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity. Thermal design leverages RθJC = 10°C/W and RθJA = 55°C/W for PCB layout planning under sustained transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail (e.g., 12V automotive nominal). |
| VBR min/max | 18.9 / 20.9 V - Breakdown occurs within this band at 1mA test current; defines precise turn-on threshold for transient detection. |
| VC @ IPPM | 27.6 V - Clamped voltage at 57A peak pulse (10/1000μs); determines worst-case overvoltage seen by protected ICs. |
| PPK | 1500 W - Peak pulse power handling per single transient; supports robust immunity against ISO 7637-2 Pulse 5a (load dump). |
| IR @ VWM | <1 μA - Reverse leakage at 17V; ensures negligible standby current drain in battery-critical applications. |
| Response time | <1.0 ps - Time from 0V to VBR min; enables protection of fast-edge digital interfaces without signal distortion. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Case meets UL 94V-0; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage events - no polarity dependency. |
| Cathode (K) | Transient return path (bidirectional) | Electrically identical to Anode; device functions identically regardless of orientation on PCB - simplifies layout and assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines (e.g., CAN bus, sensor bridges) without external polarity management. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/connect), and Pulse 3a/3b (transient coupling) - meets OEM automotive EMC requirements. |
| Glass passivated junction | Ensures stable VBR and low IR over lifetime and temperature; eliminates risk of junction degradation under repeated surge stress. |
| Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirement and reduces manufacturing overhead in SMT lines. |
Applications
| Automotive Power Rail Protection | CAN/LIN Bus Transient Suppression |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load dump (Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point to limit rail voltage to ≤27.6V during 1500W surges. Use Value: Prevents latch-up or permanent damage to MCU, PMIC, and analog front-ends without derating system voltage margins. | Use Scenario: High-speed CAN FD or LIN transceivers interfacing with vehicle harnesses subject to EFT and ESD. IC Role / Device Role / Timing Role: Low-capacitance (<100pF), bidirectional shunt clamp across differential bus lines (CANH/CANL or LIN). Use Value: Maintains signal integrity while suppressing ±25kV contact ESD (IEC 61000-4-2) and 40A fast transients (IEC 61000-4-4) without adding timing skew. |
| Industrial Sensor Interface Protection | LED Driver Input Surge Guarding |
Use Scenario: 4–20mA or RS-485 field transmitters connected to long cables in factory environments. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to clamp induced lightning-induced surges (IEC 61000-4-5). Use Value: Limits transient voltage to 27.6V, protecting precision op-amps and ADCs while preserving measurement accuracy and offset stability. | Use Scenario: Constant-current LED drivers powered from unregulated 24V DC supplies prone to switching noise and hot-plug spikes. IC Role / Device Role / Timing Role: Input-side TVS absorbing repetitive 1500W pulses from inductive kickback and relay bounce. Use Value: Extends driver IC lifetime by preventing gate oxide rupture and bond-wire fusing during frequent 8.3ms half-sine surges up to 200A IFSM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA (Bourns) | Same VWM (17V), lower PPK (600W), smaller SMB package (DO-214AA), higher RθJA (~75°C/W) | Lower surge rating suits consumer-grade or non-automotive applications; not ISO 7637-2 certified | Select SMBJ17CA only if space-constrained and peak transients remain ≤600W |
| 1.5KE17CA (ON Semiconductor) | Same VWM/VBR/VC specs, through-hole DO-15 package, higher steady-state PD (5W), same 1500W PPK | Requires wave soldering or hand assembly; unsuitable for high-density SMT production | Choose 1.5KE17CA only for prototyping or legacy through-hole designs where rework tolerance is prioritized |
Compared with SMBJ17CA and 1.5KE17CA, the SMCJ17CA uniquely balances 1500W surge capability, DO-214AB thermal performance (RθJA = 55°C/W), and full ISO 7637-2 compliance - making it the preferred choice for automated SMT production of automotive and industrial modules requiring validated load-dump immunity.
Availability
SMCJ17CA is available at Aetrix Electronics and suitable for automotive ECU power rail protection, CAN/LIN bus interface hardening, and industrial sensor input conditioning requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for SMCJ17CA 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 global distribution and AEC-Q200 qualified product lines.
The SMCJ series is part of TSC's automotive-grade transient suppression portfolio, engineered specifically for ISO 7637-2 and IEC 61000-4-x compliance in harsh environment control units and body electronics.
FAQ
What is the clamping voltage of the SMCJ17CA under a 10/1000μs surge?
The SMCJ17CA clamps to a maximum of 27.6 V when subjected to a 57 A peak pulse current with a 10/1000μs waveform. This value is measured per standard test conditions (TA = 25°C) and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMCJ17CA achieves this clamping performance while sustaining 1500 W peak power dissipation.
Is the SMCJ17CA suitable for bidirectional signal line protection like CAN bus?
Yes, the SMCJ17CA is explicitly designed for bidirectional operation, with symmetrical electrical characteristics in both polarities. Its DO-214AB package has no cathode marking, and all parameters - including VBR, VC, and IR - apply equally in forward and reverse directions. This makes the SMCJ17CA ideal for differential bus protection such as CAN, LIN, or RS-485, where polarity-agnostic clamping preserves signal integrity without requiring orientation-aware placement. The SMCJ17CA also meets ISO 7637-2 Pulse 3b requirements relevant to data line transients.
Does the SMCJ17CA meet automotive qualification standards?
The SMCJ17CA complies with ISO 7637-2 (Pulse 1, 2a, 2b, 3a, 3b) for automotive transient immunity and is manufactured to JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling direct use in AEC-Q200-compliant designs when paired with appropriate board-level validation. While the SMCJ17CA itself is not individually AEC-Q200 certified, Taiwan Semiconductor qualifies the entire SMCJ family for automotive applications, and the SMCJ17CA's electrical and mechanical specifications align with common OEM stress-test requirements for body control modules and power distribution units.
What is the maximum steady-state power dissipation (PD) of the SMCJ17CA?
The SMCJ17CA has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, as specified in its Absolute Maximum Ratings table. This value reflects continuous DC or low-frequency power handling capability - distinct from its 1500 W peak pulse rating. In practice, the SMCJ17CA should not be operated near this PD limit under normal conditions; its primary function is transient suppression, and sustained power dissipation above a few hundred mW requires thermal analysis using RθJA = 55°C/W and board copper area. The SMCJ17CA's low IR (<1 μA at 17 V) ensures minimal static power loss in standby.
How does the SMCJ17CA compare to unidirectional TVS diodes like SMCJ17A?
The SMCJ17CA is the bidirectional variant of the SMCJ17A, sharing identical VWM (17 V), VBR (18.9–20.9 V), and VC (27.6 V) ratings but operating symmetrically in both directions - unlike the SMCJ17A, which clamps only in reverse and conducts forward like a standard diode. This makes the SMCJ17CA suitable for AC-coupled or floating lines (e.g., data buses), whereas the SMCJ17A is reserved for DC rail protection with defined polarity. Both use the same DO-214AB package and thermal specs, but the SMCJ17CA omits the cathode band marking. The "CA" suffix explicitly denotes bidirectional functionality in the SMCJ series.
SMCJ17CA 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ17CA FAQ
1.How can I place an order for SMCJ17CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CA 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 SMCJ17CA reliable?
The price and inventory of SMCJ17CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17CA is usually 5 days.
3.What payment methods are accepted for SMCJ17CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CA?
SMCJ17CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CA 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 SMCJ17CA?
For technical support, including SMCJ17CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CA requirements.
6.How does Aetrix verify that SMCJ17CA is sourced from the original manufacturer or authorized distributors?
All SMCJ17CA 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 SMCJ17CA meets industry standards.
7.What is the process for return or replacement of SMCJ17CA?
All SMCJ17CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CA, 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 SMCJ17CA part is unused and in its original packaging.
Return procedure for SMCJ17CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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