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Diodes Incorporated SMF4L17CA-7
- Part No.:
- SMF4L17CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L17CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,228
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Product details
Overview
SMF4L17CA-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for ESD and surge protection on signal/power lines. It features 17V working peak reverse voltage (VRWM), 27.6V maximum clamping voltage (VC) at 14.5A peak pulse current, and 400W peak pulse power dissipation (10/1000µs waveform). Used in automotive battery contacts and USB interface protection.
For engineers reviewing the SMF4L17CA-7 datasheet, SMF4L17CA-7 pinout, SMF4L17CA-7 application, or SMF4L17CA-7 equivalent, this page delivers verified electrical parameters, DO-219AA terminal mapping, IEC61000-4-2 ±30kV ESD rating, clamping performance under 10/1000µs surge, and direct alternatives with validated VRWM/VC/IPP trade-offs.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage VBR min/max of 18.9V/20.9V at 1mA test current and clamps to ≤27.6V at 14.5A IPP. Its fast response time (<5.0ns from 0V to VBR) ensures protection against ESD transients before system-level damage occurs.
Thermal design is supported by RθJA = 96°C/W and RθJC = 18°C/W, enabling reliable operation from –55°C to +175°C. The device meets JEDEC high-reliability standards and is qualified for automotive-grade applications when ordered with Q-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 17V - Maximum continuous reverse operating voltage before clamping begins; defines safe standoff for 12V automotive systems. |
| VBR (min/max) | 18.9V / 20.9V @ 1mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC (max) | 27.6V @ 14.5A - Peak clamped voltage under 10/1000µs surge; protects downstream ICs rated ≤30V absolute max. |
| PPK | 400W (10/1000µs) - Sustains high-energy transients without failure; suitable for ISO 7637-2 Pulse 1/2/5a compliance testing. |
| ESD Rating | ±30kV air / ±30kV contact per IEC61000-4-2 - Eliminates need for external ESD diodes in USB, CAN, or sensor interfaces. |
| Leakage (IR) | 0.5µA @ 17V - Negligible standby current; avoids battery drain in always-on automotive modules. |
| Package | DO-219AA - Surface-mount, 2.8mm × 1.9mm footprint; optimized for automated placement and thermal relief on 2oz Cu PCBs. |
Pinout & Package
DO-219AA is a two-terminal, bi-directional surface-mount package with no polarity marking (no cathode band). Terminals are symmetrical; either end connects to protected line or ground depending on circuit topology.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in both directions above VBR; enables single-device protection of AC-coupled or differential lines. |
| Case / Body | Thermal path | Molded plastic body transfers heat to PCB via solder joints; RθJC = 18°C/W supports 1.0W steady-state dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-2 ESD immunity | ±30kV air / ±30kV contact - Meets highest industrial and automotive ESD stress levels without derating. |
| Clamping ratio (VC/VBR) | ≤1.46 - Tight clamping margin ensures protected ICs remain within safe operating area during surge events. |
| Response time | <5.0ns - Activates before most microcontroller I/O pins can be damaged by fast-rising ESD pulses. |
| Green construction | Halogen- and antimony-free, RoHS 3 compliant - Supports automotive PPAP documentation and EU environmental compliance. |
| JEDEC reliability qualification | Qualified to AEC-Q200 stress test conditions - Validated for temperature cycling, humidity bias, and mechanical shock in automotive ECUs. |
Applications
| Automotive Battery Protection | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting 12V battery feed lines in infotainment head units against load dump and jump-start surges. IC Role / Device Role / Timing Role: Bi-directional TVS clamps reverse-polarity connection spikes and positive transients up to 400W. Use Value: Prevents damage to PMICs and MCU power rails without adding series impedance or signal distortion. |
Use Scenario: Safeguarding D+/D– lines in automotive USB host ports against ESD during cable insertion. IC Role / Device Role / Timing Role: Fast-turn-on TVS shunts ±30kV ESD strikes before USB transceiver input stages fail. Use Value: Maintains signal integrity with <0.5pF junction capacitance while meeting USB-IF ESD test requirements. |
| Industrial Sensor Interface | RS-485 Transceiver Protection |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Clamps induced surges from nearby motor switching or lightning-induced coupling on long cables. Use Value: Enables robust 0–10V or 4–20mA signal transmission with <0.5µA leakage preserving measurement accuracy. |
Use Scenario: Protecting RS-485 transceivers in building management systems exposed to ground potential differences. IC Role / Device Role / Timing Role: Bi-directional clamping absorbs common-mode surges up to ±27.6V without disrupting differential signaling. Use Value: Preserves data integrity at 10Mbps rates while surviving repeated 1kV/500Ω surge tests per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA | Same VRWM (17V) and VC (27.6V), but lower PPK = 400W (same), larger SMA package (DO-214AC), higher RθJA = 125°C/W | Less suitable for space-constrained automotive modules; requires larger PCB pad area | Select if legacy board layout uses SMA footprints or higher thermal mass is acceptable |
| SMF4L18CA | VRWM = 18V, VBR = 20–22.1V, VC = 29.2V @ 13.7A - 1V higher standoff, 1.6V higher clamping | Better for 13.5V nominal systems; slightly reduced protection margin for 17V-rated loads | Choose when tighter VRWM tolerance is needed or when matching adjacent 18V rail designs |
Compared with SMAJ17CA, SMF4L17CA-7 saves >35% board area and improves thermal response; versus SMF4L18CA, it provides lower clamping voltage for critical 17V-sensitive circuits while maintaining identical surge handling capability.
Availability
SMF4L17CA-7 is available at Aetrix Electronics and suitable for automotive battery protection, USB 2.0 interface hardening, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for SMF4L17CA-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance, high-reliability components for automotive, industrial, and consumer markets.
The SMF4L series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for compact, high-power ESD/surge protection in space-constrained automotive and industrial control applications.
FAQ
What is the maximum clamping voltage of SMF4L17CA-7 at its rated peak pulse current?
The maximum clamping voltage (VC) is 27.6V at 14.5A peak pulse current (10/1000µs waveform), measured per IEC 61000-4-5 test conditions. This value guarantees that protected downstream components see no more than 27.6V during standardized surge events, ensuring compatibility with 30V-tolerant ICs.
Is SMF4L17CA-7 suitable for automotive applications requiring AEC-Q200 qualification?
Yes - SMF4L17CA-7 is manufactured in IATF 16949-certified facilities and qualified to JEDEC high-reliability standards aligned with AEC-Q200. For formal PPAP submission, Diodes offers Q-suffix automotive-grade variants (e.g., SMF4L17CAQ-7) with full change control and test reports.
How does the DO-219AA package compare thermally to SMA (DO-214AC)?
DO-219AA offers RθJA = 96°C/W versus SMA's typical 125°C/W due to lower thermal resistance path to PCB copper. Its smaller footprint (2.8mm × 1.9mm vs. 4.5mm × 2.7mm) also reduces thermal mass, enabling faster heat dissipation during repetitive surge events in high-density layouts.
Can SMF4L17CA-7 replace uni-directional TVS diodes in DC power rail protection?
No - SMF4L17CA-7 is bi-directional and lacks polarity marking; it cannot substitute for uni-directional devices like SMF4L17A in DC-only applications where forward conduction must be blocked. Use SMF4L17A for 12V rail protection; SMF4L17CA-7 only where AC or bidirectional surge paths exist.
SMF4L17CA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-219AA
- Series:
- SMF4L
- 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):
- 14.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L17CA-7 FAQ
1.How can I place an order for SMF4L17CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L17CA-7 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 SMF4L17CA-7 reliable?
The price and inventory of SMF4L17CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L17CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L17CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L17CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L17CA-7?
SMF4L17CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L17CA-7 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 SMF4L17CA-7?
For technical support, including SMF4L17CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L17CA-7 requirements.
6.How does Aetrix verify that SMF4L17CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L17CA-7 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 SMF4L17CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L17CA-7?
All SMF4L17CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L17CA-7, 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 SMF4L17CA-7 part is unused and in its original packaging.
Return procedure for SMF4L17CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L17CA-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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