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Diodes Incorporated SMF4L10AQ-7
- Part No.:
- SMF4L10AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L10AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:4,948
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Product details
Overview
SMF4L10AQ from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) designed for automotive-grade overvoltage protection at 10V working peak reverse voltage. It delivers 23.5A maximum peak pulse current (10/1000µs), clamps to ≤17V at rated surge, and provides ±30kV IEC61000-4-2 ESD protection-ideal for protecting battery contact interfaces in 12V automotive subsystems.
For engineers reviewing the SMF4L10AQ datasheet, SMF4L10AQ pinout, SMF4L10AQ application, or SMF4L10AQ equivalent, key selection criteria include its AEC-Q101 qualification, DO-219AA package thermal resistance (RθJA = 96°C/W), unidirectional polarity marking (cathode band), and 1.0W DC power dissipation capability on standard FR-4 PCB layouts.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive electronics, activating when transient voltage exceeds its 11.1–12.3V breakdown range (VBR) to divert surge energy away from downstream circuitry. Its fast response time (<1.0ns from 0V to VBR) ensures protection against ESD and load-dump transients before damage occurs.
The device uses silicon avalanche junction technology optimized for high-energy pulse handling under IEC 61000-4-5 (10/1000µs) and ISO 7637-2 waveforms. Its DO-219AA package enables low-inductance mounting and supports automated SMT assembly while maintaining robust thermal performance up to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform); sustains single high-energy surges without failure |
| Working Peak Reverse Voltage | 10V; sets maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage Range | 11.1–12.3V @ 1mA; defines precise activation threshold for transient suppression |
| Maximum Clamping Voltage | 17V @ 23.5A; limits protected circuit voltage during worst-case surge event |
| ESD Withstand | ±30kV air/contact per IEC61000-4-2; eliminates need for external ESD components |
| Junction Temperature Range | −55°C to +175°C; supports under-hood automotive deployment without derating |
| DC Power Dissipation | 1.0W on 1"×1" FR-4 PCB with 2 oz Cu; defines steady-state thermal design margin |
Pinout & Package
Package: DO-219AA - ultra-low-profile surface-mount plastic package (1.90mm × 2.80mm × 0.60mm), halogen-free, RoHS-compliant, with matte tin-plated copper alloy leadframe and cathode band marking for unidirectional polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground | Current return path during clamping; must be routed with minimal inductance |
| Cathode | High-side connection to protected line (e.g., battery rail) | Surge entry point; marked by visible cathode band; connects to input trace |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP support and IATF 16949 manufacturing |
| Fast response time | <1.0ns turn-on delay ensures protection before ESD or switching transients propagate |
| Green packaging | Halogen- and antimony-free molding compound (Br+Cl <1500ppm, Sb <1000ppm) |
| Low leakage current | 5μA max at 10V VRWM minimizes standby power loss in always-on battery circuits |
| High surge tolerance | Withstands 40A peak forward surge (8.3ms half-sine) for load-dump immunity |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Input Protection |
|---|---|
Use Scenario: Protecting 12V supply inputs of BCM microcontrollers and CAN transceivers from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Parallel clamping TVS placed directly at connector entry point to shunt surge energy before reaching LDOs and logic ICs. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Test Pulse 5a (35V/100ms), enabling reliable operation across vehicle lifecycle. |
Use Scenario: Safeguarding USB-C and 12V auxiliary power inputs of head unit power management ICs against ESD and hot-plug spikes. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of buck converters and USB PD controllers. Use Value: Eliminates need for secondary TVS stages due to ±30kV IEC61000-4-2 rating and 17V clamping, reducing BOM count and board space. |
| Telematics Control Unit (TCU) Battery Interface | ADAS Camera Module Power Rail |
Use Scenario: Securing always-on VBAT input of LTE/GNSS modules exposed to battery disconnection/reconnection events. IC Role / Device Role / Timing Role: Unidirectional TVS tied between battery rail and system ground, leveraging cathode-band polarity for correct biasing. Use Value: Maintains functional safety integrity under ASIL-B conditions via AEC-Q101 qualification and −55°C to +175°C operation. |
Use Scenario: Protecting 5V/3.3V camera sensor power supplies from ESD induced through FAKRA connectors and flex cables. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to image sensor PMIC input pins to minimize loop inductance. Use Value: Enables compliance with ISO 10605 (330pF/330Ω) discharge testing without signal distortion or pixel corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Higher clamping voltage (16.7V vs. 17V), same 400W rating, SMA package (larger footprint, higher RθJA = 125°C/W) | Less suitable for space-constrained automotive modules; requires larger pad layout | Choose if legacy SMA footprint compatibility is required and thermal margin allows |
| TPSMD10A | Lower leakage (1μA vs. 5μA), identical VRWM/VBR, but only AEC-Q200 qualified (not Q101) | Not approved for safety-critical automotive ECUs requiring AEC-Q101 validation | Acceptable for industrial or consumer applications where automotive qualification is not mandated |
Compared with SMAJ10A and TPSMD10A, SMF4L10AQ offers superior thermal performance in a smaller DO-219AA package and full AEC-Q101 compliance-making it the preferred choice for next-generation automotive electronics where size, reliability, and qualification rigor are critical.
Availability
SMF4L10AQ is available at Aetrix Electronics and suitable for automotive body control modules, infotainment systems, and telematics units requiring stable component supply with full AEC-Q101 traceability and long-term production continuity.
Supply support for SMF4L10AQ 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, industrial, and computing markets.
The SMF4L series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for automotive power rail protection with emphasis on low clamping, fast response, and robust thermal performance in compact surface-mount packages.
FAQ
What is the polarity configuration of SMF4L10AQ?
SMF4L10AQ is a unidirectional TVS diode, indicated by a visible cathode band on the DO-219AA package. It conducts only during reverse-biased overvoltage events-blocking normal forward current flow while clamping positive transients on the cathode-connected line to ground.
Does SMF4L10AQ meet automotive qualification standards?
Yes, SMF4L10AQ is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and PPAP capable. It is explicitly rated for automotive applications including battery contact protection, body electronics, and infotainment power rails per Diodes' product definitions.
How does SMF4L10AQ perform under repeated surge stress?
SMF4L10AQ is rated for non-repetitive 10/1000µs pulses per Figure 4 in DS43393. Its 400W peak power rating assumes single-event application; repetitive surges require derating per Figure 1's ambient temperature curve and must stay within the 1.0W DC power limit on standard PCB layouts.
What is the recommended PCB layout for optimal clamping performance?
Place SMF4L10AQ as close as possible to the protected interface connector, using short, wide traces to both anode (ground) and cathode (line). Follow Diodes' suggested DO-219AA pad layout (C=2.86mm, G=1.52mm) to ensure solder joint reliability and minimize parasitic inductance that could degrade clamping speed.
SMF4L10AQ-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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L10AQ-7 FAQ
1.How can I place an order for SMF4L10AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L10AQ-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 SMF4L10AQ-7 reliable?
The price and inventory of SMF4L10AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L10AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L10AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L10AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L10AQ-7?
SMF4L10AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L10AQ-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 SMF4L10AQ-7?
For technical support, including SMF4L10AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L10AQ-7 requirements.
6.How does Aetrix verify that SMF4L10AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L10AQ-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 SMF4L10AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L10AQ-7?
All SMF4L10AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L10AQ-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 SMF4L10AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L10AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L10AQ-7 Tags
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