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Diodes Incorporated SMF4L16AQ-7
- Part No.:
- SMF4L16AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L16AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,870
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Product details
Overview
SMF4L16AQ-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with 16V working peak reverse voltage (VRWM), 17.8–19.7V breakdown voltage (VBR), and 26V maximum clamping voltage (VC) at 15.3A peak pulse current. It delivers ±30kV ESD protection per IEC61000-4-2 and is AEC-Q101 qualified for automotive power line and battery contact surge suppression.
For engineers reviewing the SMF4L16AQ-7 datasheet, SMF4L16AQ-7 pinout, SMF4L16AQ-7 application, or SMF4L16AQ-7 equivalent, key selection criteria include clamping performance under 10/1000µs transients, unidirectional polarity marking, DO-219AA package thermal resistance (RθJA = 96°C/W), and compliance with automotive PPAP and IATF 16949 manufacturing requirements.
Technical Context
This TVS diode operates as a fast-acting shunt protector in DC power rails, clamping overvoltage transients before they damage downstream ICs. Its sub-1ns response time (unidirectional) and low leakage (<0.5µA at 16V) enable reliable protection without loading sensitive circuits during normal operation.
The device uses silicon avalanche junction technology optimized for high-energy 400W (10/1000µs) pulse handling while maintaining tight VBR tolerance (±5.6% typical) and stable clamping across temperature (–55°C to +175°C operating range).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 16V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin above 12V automotive systems. |
| VBR (min/max) | 17.8V / 19.7V - Breakdown initiates within this band at 1mA test current; ensures predictable turn-on without premature conduction. |
| VC @ IPP | 26V @ 15.3A - Clamped voltage during 10/1000µs surge; limits stress on protected ICs to ≤26V under worst-case transient. |
| PPK | 400W - Peak pulse power rating defines maximum transient energy absorption capability per single event. |
| IR @ VRWM | <0.5µA - Reverse leakage at rated standoff voltage; negligible current draw in standby, critical for battery-powered systems. |
| ESD Rating | ±30kV (air/contact) per IEC61000-4-2 - Validates robustness against human-body-model electrostatic discharge events. |
| TJ Range | –55°C to +175°C - Extended junction temperature range supports under-hood automotive deployment and industrial environments. |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount molded plastic case (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 path during clamping; connects to system GND to sink surge energy away from load. |
| Cathode | High-side connection to protected line (e.g., 12V rail) | Marked by band; reverse-biased during normal operation; avalanches to clamp overvoltage toward ground. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000µs) | Enables single-device protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges in 12V automotive subsystems. |
| AEC-Q101 qualification & PPAP capability | Validates reliability for automotive safety-critical power domains including body control modules and infotainment power inputs. |
| DO-219AA footprint (1.9×2.8mm) | Reduces PCB area by >30% vs. SMA/SMB packages while maintaining thermal performance via low RθJC (18°C/W). |
| ±30kV ESD immunity (IEC61000-4-2) | Eliminates need for secondary ESD protection on exposed connectors or switches in portable and automotive user interfaces. |
| Unidirectional configuration | Prevents forward conduction during normal operation; ideal for DC power lines where polarity is fixed and reverse blocking is required. |
Applications
| Automotive Power Distribution | Battery Management Systems |
|---|---|
|
Use Scenario: Protection of 12V supply lines feeding ADAS camera modules and radar ECUs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt clamping element placed between battery feed and LDO input, responding within <1ns to limit voltage excursion to ≤26V. Use Value: Prevents latch-up or gate oxide damage in 28nm/16nm automotive SoCs by holding rail voltage below absolute maximum ratings during ISO 16750-2 tests. |
Use Scenario: Surge suppression on cell monitor IC inputs and fuel gauge analog front-ends in EV battery packs. IC Role / Device Role / Timing Role: Unidirectional TVS tied to each cell voltage sense line, clamping ESD and switching noise from adjacent high-current busbars. Use Value: Maintains measurement accuracy by limiting leakage to <0.5µA at 16V, avoiding offset errors in µV-level voltage sensing paths. |
| Industrial Control I/O Modules | USB-C Power Delivery Ports |
|
Use Scenario: Input protection for 24V PLC digital input cards exposed to field wiring inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense on terminal block inputs, absorbing 400W pulses without degradation across 1000+ surge events. Use Value: Extends field service life by eliminating fuse replacement and board-level failures caused by repetitive 100V/10A transients. |
Use Scenario: VBUS line protection in USB-C PD 3.0 chargers supporting 20V/5A delivery, guarding against hot-plug overshoot and adapter fault conditions. IC Role / Device Role / Timing Role: Unidirectional clamp between PD controller and buck converter input, activated only during overvoltage events above 16V. Use Value: Enables compact 2-layer PCB layout with DO-219AA footprint while meeting USB-IF ESD compliance without additional RC filters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A | Same VRWM (16V) and VC (26V), but SMA package (4.5×2.7mm); 600W PPK rating; higher RθJA (110°C/W) | Larger footprint; better for higher-energy surges but less suitable for space-constrained automotive modules | Select when 600W headroom is needed and PCB area permits larger package |
| 1.5SMC16A | Same VRWM/VC, but SMC package (7.1×6.2mm); 1500W PPK; RθJA = 15°C/W; 10× larger volume | Used in industrial AC/DC front-ends; not AEC-Q101 qualified; no PPAP support | Choose only for non-automotive, high-power AC line protection where thermal mass matters more than size |
Compared with SMAJ16A and 1.5SMC16A, SMF4L16AQ-7 offers optimal balance of miniaturization (DO-219AA), automotive qualification, and 400W capability-making it the preferred choice for next-gen compact, safety-certified 12V/24V electronic control units.
Availability
SMF4L16AQ-7 is available at Aetrix Electronics and suitable for automotive power distribution, battery management systems, industrial I/O modules, and USB-C power delivery ports requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMF4L16AQ-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The SMF4L series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically for AEC-Q101 compliance, high-reliability under-hood deployment, and seamless integration into PPAP-controlled automotive electronics supply chains.
FAQ
What is the polarity configuration of SMF4L16AQ-7?
SMF4L16AQ-7 is a unidirectional TVS diode, indicated by the cathode band marking on the DO-219AA package. It conducts only during reverse-biased overvoltage events and blocks forward current, making it suitable for DC power rail protection where polarity is fixed and reverse conduction must be prevented.
Does SMF4L16AQ-7 meet automotive qualification standards?
Yes-SMF4L16AQ-7 is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and PPAP capable. It undergoes rigorous stress testing including HTOL, temperature cycling, and surge endurance to ensure reliability in automotive environments such as engine control units and body electronics.
How does the DO-219AA package affect thermal performance?
The DO-219AA package provides RθJA = 96°C/W (on 1"×1" FR-4 with 2 oz Cu), RθJC = 18°C/W, and RθJS = 70°C/W. Its low-profile geometry and direct die-to-pad thermal path enable efficient heat dissipation in dense layouts, supporting sustained operation up to +175°C junction temperature without derating.
Can SMF4L16AQ-7 replace older SMA/SMB TVS diodes in existing designs?
Yes-SMF4L16AQ-7 offers identical electrical specs (VRWM = 16V, VC = 26V) and superior ESD rating (±30kV) versus legacy SMAJ16A, but requires PCB footprint revision to DO-219AA (1.9×2.8mm). Its smaller size and lower thermal resistance make it a drop-in functional upgrade where layout space allows.
SMF4L16AQ-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):
- 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
SMF4L16AQ-7 FAQ
1.How can I place an order for SMF4L16AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L16AQ-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 SMF4L16AQ-7 reliable?
The price and inventory of SMF4L16AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L16AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L16AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L16AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L16AQ-7?
SMF4L16AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L16AQ-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 SMF4L16AQ-7?
For technical support, including SMF4L16AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L16AQ-7 requirements.
6.How does Aetrix verify that SMF4L16AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L16AQ-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 SMF4L16AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L16AQ-7?
All SMF4L16AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L16AQ-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 SMF4L16AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L16AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L16AQ-7 Tags
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Diodes Incorporated
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