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Diodes Incorporated SMF4L13A-7
- Part No.:
- SMF4L13A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L13A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:4,927
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Product details
Overview
SMF4L13A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) designed for clamping fast transients on power and signal lines. It features a 13V working peak reverse voltage (VRWM), 14.4V minimum breakdown voltage (VBR), 21.5V maximum clamping voltage (VC) at 18.6A peak pulse current, and <1.0ns response time - deployed in automotive battery contacts and industrial power management circuits.
For engineers reviewing the SMF4L13A-7 datasheet, SMF4L13A-7 pinout, SMF4L13A-7 application, or SMF4L13A-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, IEC61000-4-2 ±30kV ESD robustness, DO-219AA footprint compatibility, and unidirectional polarity alignment with DC rail protection topology.
Technical Context
This TVS operates as a silicon avalanche diode with sharp reverse-biased breakdown characteristics, triggered when line voltage exceeds VRWM = 13V. Its low dynamic impedance ensures stable clamping at VC = 21.5V under 10/1000µs surge conditions, limiting energy dissipation to protect downstream MOSFETs or PMICs.
The device uses a planar junction structure in a molded DO-219AA package with cathode band marking, enabling automated optical inspection and high-reliability solder joints. Thermal resistance RθJA = 96°C/W allows operation up to +175°C junction temperature under defined PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform): sustains single-event surges without thermal runaway in compact layouts |
| Working Peak Reverse Voltage | 13V: sets maximum continuous DC bias before leakage rises above 0.5µA |
| Breakdown Voltage (Min) | 14.4V @ 1mA: guarantees reliable conduction onset during overvoltage events |
| Clamping Voltage | 21.5V @ 18.6A: defines worst-case voltage seen by protected circuit during surge |
| ESD Rating | ±30kV contact/air per IEC61000-4-2: meets automotive and industrial immunity requirements |
| Response Time | <1.0ns (unidirectional): faster than most microcontroller GPIO response, ensuring pre-damage suppression |
| Junction Temperature Range | –55°C to +175°C: supports under-hood automotive and industrial ambient environments |
Pinout & Package
Package: DO-219AA - ultra-thin, surface-mount plastic case (1.90mm × 2.80mm × 0.60mm), matte tin-plated copper alloy leads, moisture sensitivity level 1, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; forms clamping loop with cathode |
| Cathode | High-side surge input terminal | Marked with band; connects to protected line (e.g., 12V battery rail); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse rating | Enables protection against ISO 7637-2 Pulse 1/2a/5a surges without derating on standard 2oz FR-4 pads |
| IEC61000-4-2 ±30kV ESD immunity | Eliminates need for secondary ESD components in USB, CAN, or sensor interface lines |
| DO-219AA footprint | Reduces board area by 40% vs. SMA packages while maintaining 1.0W steady-state dissipation capability |
| Lead-free, halogen-free, RoHS 3 compliant | Meets automotive PPAP material declarations and J-STD-020 Level 1 reflow compatibility |
| Unidirectional polarity | Prevents reverse-bias leakage on DC-coupled rails while allowing full negative swing tolerance |
Applications
| Automotive Battery Protection | Industrial Power Input Stage |
|---|---|
|
Use Scenario: 12V battery feed to body control module exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converter input. Use Value: Limits voltage to ≤21.5V during 10/1000µs surges, preventing damage to 24V-rated input capacitors and controller ICs. |
Use Scenario: 24V industrial PLC power entry subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-line transient suppressor in series with fuse and common-mode choke. Use Value: Absorbs up to 400W peak energy within 1ns, reducing stress on downstream MOVs and enabling smaller filter design. |
| USB-C Power Delivery Line | Automotive Sensor Interface |
|
Use Scenario: VBUS line in automotive infotainment USB-C port subject to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and chassis ground, adjacent to connector. Use Value: Clamps ±30kV ESD strikes to <22V, preserving USB PD controller integrity without affecting 5–20V negotiation range. |
Use Scenario: LIN bus or analog sensor supply line in engine bay exposed to ignition noise and alternator ripple. IC Role / Device Role / Timing Role: Low-capacitance (<50pF) clamping device on 5V sensor rail. Use Value: Suppresses sub-100ns spikes without distorting 10kHz sensor signals, maintaining ADC accuracy and communication timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | Same VRWM (13V), but higher VC = 23.2V at 19.2A; SMA package (larger footprint, higher RθJA = 110°C/W) | Less effective clamping margin for 16V-tolerant ICs; requires larger PCB area | Choose only if DO-219AA assembly capability is unavailable and thermal budget permits |
| SMF4L13CA | Bidirectional variant; identical VRWM, VBR, VC specs but symmetric clamping for AC-coupled lines | Not suitable for DC rails with polarity-sensitive loads; doubles leakage at VRWM | Select only for differential signal lines (e.g., RS-485, CAN) requiring bidirectional protection |
Compared with SMAJ13A, SMF4L13A-7 delivers tighter clamping and superior thermal performance in half the footprint; versus SMF4L13CA, it provides lower leakage and optimized DC rail protection without unnecessary bidirectional conduction paths.
Availability
SMF4L13A-7 is available at Aetrix Electronics and suitable for automotive battery protection, industrial power input stages, USB-C power delivery lines, and automotive sensor interfaces requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for SMF4L13A-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 analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for automotive and industrial markets.
SMF4L13A-7 belongs to the SMF4Lx.xA series - a family of 400W DO-219AA TVS diodes engineered specifically for space-constrained, high-surge automotive and industrial power rail protection with AEC-Q200-aligned reliability.
FAQ
What is the maximum clamping voltage of SMF4L13A-7 under standard test conditions?
The maximum clamping voltage (VC) is 21.5V at 18.6A peak pulse current using the 10/1000µs waveform per IEC61000-4-5. This value is measured at TA = +25°C with specified PCB thermal pad layout and represents the worst-case voltage imposed on protected circuitry during surge events.
Is SMF4L13A-7 suitable for automotive under-hood applications?
Yes - it is rated for –55°C to +175°C operating junction temperature, qualified to JEDEC standards referenced in AEC-Q200, and manufactured in IATF 16949-certified facilities. Its DO-219AA package and 400W surge rating meet ISO 7637-2 Pulse 5a requirements for engine control units and body modules.
How does the DO-219AA package compare to SMA in thermal performance?
SMF4L13A-7 in DO-219AA achieves RθJA = 96°C/W on 1"×1" 2oz FR-4, versus ~110°C/W for SMAJ13A. The lower thermal resistance enables higher sustained power handling in dense layouts and reduces risk of thermal runaway during repetitive surge events.
Can SMF4L13A-7 be used in bidirectional signal lines like RS-485?
No - it is unidirectional and lacks symmetrical clamping. For RS-485 or CAN bus protection, use the bidirectional variant SMF4L13CA, which provides matched clamping in both polarities and is marked without cathode band.
SMF4L13A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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
SMF4L13A-7 FAQ
1.How can I place an order for SMF4L13A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L13A-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 SMF4L13A-7 reliable?
The price and inventory of SMF4L13A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L13A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L13A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L13A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L13A-7?
SMF4L13A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L13A-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 SMF4L13A-7?
For technical support, including SMF4L13A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L13A-7 requirements.
6.How does Aetrix verify that SMF4L13A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L13A-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 SMF4L13A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L13A-7?
All SMF4L13A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L13A-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 SMF4L13A-7 part is unused and in its original packaging.
Return procedure for SMF4L13A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L13A-7 Tags
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ESD9B5.0ST5G
onsemi
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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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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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