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Diodes Incorporated SMF4L16CAQ-7
- Part No.:
- SMF4L16CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L16CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,365
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Product details
Overview
SMF4L16CAQ-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, rated for 400W peak pulse power (10/1000µs), 16V working peak reverse voltage (VRWM), 26V maximum clamping voltage (VC) at 15.3A surge current, and AEC-Q101 qualified for automotive battery contact and power line protection.
For engineers reviewing the SMF4L16CAQ-7 datasheet, SMF4L16CAQ-7 pinout, SMF4L16CAQ-7 application, or SMF4L16CAQ-7 equivalent, this device is selected for ESD-critical interfaces requiring ±30kV IEC61000-4-2 air/contact immunity, fast sub-5ns response, and stable clamping under repetitive transients in 12V/24V vehicle subsystems.
Technical Context
This bi-directional TVS operates symmetrically across both polarities with no cathode band marking, enabling bidirectional overvoltage clamping without polarity dependency. Its silicon avalanche structure delivers <5.0ns response time from 0V to breakdown, and maintains ≤0.5μA reverse leakage at 16V VRWM.
The device sustains 400W peak pulse power per 10/1000µs waveform while limiting transient voltage to 26V at 15.3A, with thermal resistance RθJA = 96°C/W on standard FR-4 PCB layout. It is rated for -55°C to +175°C operation and qualified to AEC-Q101 for automotive underhood and infotainment power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform); enables robust protection against ISO 7637-2 Load Dump and EFT bursts |
| Working Peak Reverse Voltage | 16V; matches nominal 12V automotive systems with 33% margin above supply rail |
| Max Clamping Voltage | 26V at 15.3A IPP; ensures downstream ICs see <26V during 10/1000µs surges |
| ESD Rating | ±30kV air / ±30kV contact per IEC61000-4-2; eliminates need for external ESD staging |
| Response Time | <5.0ns (bi-directional); clamps before sensitive analog or MCU inputs are stressed |
| Operating Temp Range | -55°C to +175°C; supports engine control units and transmission modules |
| AEC-Q101 Qualified | Yes; certified for automotive use with PPAP capability and IATF 16949 manufacturing |
Pinout & Package
Package: DO-219AA - surface-mount, molded plastic, halogen/antimony-free "Green" compound (UL 94V-0), 0.016g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (negative polarity) | Connects to protected line; conducts during negative-going transients |
| Cathode | Transient current sink (positive polarity) | Connects to protected line; conducts during positive-going transients |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating lines without polarity concerns |
| 400W peak pulse rating | Withstands multiple ISO 7637-2 Pulse 1/2a/5a events without degradation |
| ±30kV ESD immunity | Meets full IEC61000-4-2 Level 4 without additional ESD components |
| DO-219AA footprint | 0.81–1.20mm height enables ultra-thin board stacking in space-constrained ECUs |
| AEC-Q101 qualification | Validated for automotive production with change control, PPAP, and traceable sourcing |
Applications
| Automotive Body Control Module (BCM) | Infotainment System Power Input |
|---|---|
Use Scenario: Protecting 12V power input to BCM microcontroller and CAN transceivers from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bi-directional TVS clamping transient energy before it reaches LDOs and digital logic. Use Value: Limits voltage to 26V during 15.3A surges, preventing latch-up or permanent damage to 3.3V/5V domain ICs. |
Use Scenario: Safeguarding USB-C and HDMI power rails in head unit against hot-plug ESD and cable-induced transients. IC Role / Device Role / Timing Role: First-line ESD clamp on VBUS and auxiliary power lines prior to DC-DC converters. Use Value: Absorbs ±30kV contact ESD without voltage overshoot, eliminating reset events during field service. |
| Electric Power Steering (EPS) Sensor Interface | ADAS Camera Module Power Rail |
Use Scenario: Shielding analog sensor signal conditioning circuits (e.g., torque sensor bridge) from battery ripple and ignition noise. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp on low-voltage analog supply (5V/3.3V) rails. Use Value: Maintains ≤0.5μA leakage at 16V VRWM, avoiding DC offset errors in precision amplifiers. |
Use Scenario: Protecting 12V camera module input against ISO 16750-2 supply transients during cold crank and alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage suppression ahead of buck converter and image sensor ASIC. Use Value: Delivers 400W pulse handling with 26V clamping, ensuring uninterrupted video stream during engine start. |
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 |
|---|---|---|---|
| SMAJ16CA | DO-214AC package; 400W rating; 26.5V VC @ 15.1A; higher RθJA (110°C/W) | Larger footprint (4.5×2.7mm vs. 2.8×1.9mm); less suitable for ultra-thin modules | Prefer SMF4L16CAQ-7 where board height <1.2mm or AEC-Q101 PPAP is required |
| TPSMF4L16CA | Same DO-219AA package; identical electrical specs; enhanced surge lifetime per AEC-Q101 rev G | Drop-in replacement with extended qualification for next-gen ADAS platforms | Select TPSMF4L16CA when designing for ASIL-B functional safety compliance paths |
Compared with SMAJ16CA and TPSMF4L16CA, SMF4L16CAQ-7 offers the smallest profile (DO-219AA), lowest thermal resistance (96°C/W), and direct AEC-Q101 qualification-making it optimal for space- and reliability-critical automotive power nodes where height and long-term surge endurance are design constraints.
Availability
SMF4L16CAQ-7 is available at Aetrix Electronics and suitable for automotive body electronics, infotainment power management, and ADAS camera modules requiring stable component supply across multi-year production cycles.
Supply support for SMF4L16CAQ-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.
The SMF4L series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for automotive power rail and interface protection with emphasis on compact packaging, ESD robustness, and thermal performance in under-hood environments.
FAQ
What is the clamping voltage of SMF4L16CAQ-7 at its rated peak pulse current?
The maximum clamping voltage (VC) is 26V at 15.3A peak pulse current (IRSM), measured per 10/1000µs waveform. This value is guaranteed across -55°C to +175°C operating temperature and ensures downstream circuitry remains within safe voltage limits during standardized surge events such as ISO 7637-2 Pulse 5a.
Is SMF4L16CAQ-7 unidirectional or bidirectional, and how is polarity identified?
SMF4L16CAQ-7 is a bi-directional TVS diode with no cathode band marking-confirmed by its "C" suffix and absence of polarity indicator in the marking code (UP). It provides symmetrical clamping for both positive and negative transients, making it ideal for AC-coupled or floating signal/power lines where polarity cannot be assumed.
Does SMF4L16CAQ-7 meet automotive qualification standards?
Yes-SMF4L16CAQ-7 is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and PPAP capable. It is explicitly listed in Diodes' automotive product definitions as suitable for power management, battery contacts, and ECU applications requiring change-controlled release and long-term reliability validation.
What is the thermal resistance and steady-state power dissipation of SMF4L16CAQ-7?
SMF4L16CAQ-7 has a junction-to-ambient thermal resistance (RθJA) of 96°C/W on a 1" × 1" FR-4 PCB with 2 oz. copper, and a DC steady-state power dissipation (PD) of 1.0W. These values define its continuous power handling capability and inform heatsinking requirements when used in high-duty-cycle transient environments.
SMF4L16CAQ-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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 15.3A
- 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
SMF4L16CAQ-7 FAQ
1.How can I place an order for SMF4L16CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L16CAQ-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 SMF4L16CAQ-7 reliable?
The price and inventory of SMF4L16CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L16CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L16CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L16CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L16CAQ-7?
SMF4L16CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L16CAQ-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 SMF4L16CAQ-7?
For technical support, including SMF4L16CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L16CAQ-7 requirements.
6.How does Aetrix verify that SMF4L16CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L16CAQ-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 SMF4L16CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L16CAQ-7?
All SMF4L16CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L16CAQ-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 SMF4L16CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L16CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L16CAQ-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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