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Diodes Incorporated SMF4L16A-7
- Part No.:
- SMF4L16A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L16A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,652
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Product details
Overview
SMF4L16A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) designed for robust overvoltage protection in DC power rails and signal lines. It features a 16V working peak reverse voltage (VRWM), 17.8V minimum breakdown voltage (VBR), 26V maximum clamping voltage (VC) at 15.3A peak pulse current, and IEC61000-4-2 ±30kV ESD immunity - deployed in automotive battery interfaces and industrial power management systems.
For engineers reviewing the SMF4L16A-7 datasheet, SMF4L16A-7 pinout, SMF4L16A-7 application, or SMF4L16A-7 equivalent, key selection criteria include clamping performance under 10/1000µs surge, unidirectional polarity marking, DO-219AA package thermal resistance (RθJA = 96°C/W), and compliance with AEC-Q200-referenced reliability standards for automotive-grade transient suppression.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR (17.8–19.7V), it avalanches to divert surge current away from downstream circuitry while maintaining VC ≤ 26V at IPP = 15.3A. Its sub-1ns response time ensures protection before sensitive ICs experience overstress.
The device uses a planar silicon junction structure optimized for low capacitance (<100pF typical at 0V) and high surge capability in the compact DO-219AA package. Thermal design relies on low RθJC (18°C/W) and RθJS (70°C/W) to sustain 400W peak pulse power without thermal runaway under repetitive transients.
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 | 16V; maximum continuous DC or RMS voltage applied without conduction |
| Breakdown Voltage (VBR) | 17.8V min / 19.7V max @ 1mA; defines precise avalanche initiation threshold |
| Clamping Voltage (VC) | 26V max @ 15.3A IPP; limits protected circuit voltage during surge event |
| ESD Withstand | ±30kV air / ±30kV contact per IEC61000-4-2; eliminates need for external ESD stages |
| Leakage Current | 0.5µA max @ 16V VRWM; negligible standby power loss in always-on systems |
| Response Time | <1.0ns (unidirectional); enables protection of high-speed digital and analog circuits |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount molded plastic case (1.90 × 2.80 × 3.80 mm), halogen-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail; forms cathode-to-anode forward path during clamping |
| Cathode (marked by band) | High-side surge input terminal | Receives transient energy; conducts avalanche current to anode when VRWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse rating | Enables single-device protection against ISO 7637-2 Pulse 1/2a/5a transients in 12V automotive systems |
| DO-219AA footprint | Reduces PCB area by >40% vs. SMA/SMB packages while maintaining thermal performance |
| ±30kV IEC61000-4-2 ESD | Eliminates secondary ESD protection components in USB, CAN, and sensor interface designs |
| 1.0ns response time | Protects high-speed microcontrollers and ADCs before internal latch-up occurs |
| AEC-Q200 referenced qualification | Supports PPAP documentation and change control for automotive Tier-1 production programs |
Applications
| Automotive Battery Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and system input filter. Use Value: Clamps ISO 7637-2 Pulse 5a (75V/100ms) to ≤26V, preventing damage to LDOs and MCU power domains. |
Use Scenario: Safeguarding 24V digital input modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Primary surge clamp on dry-contact or optocoupler input stage. Use Value: Absorbs 400W transients without degradation, enabling IP65-rated enclosure designs without external spark gaps. |
| USB Type-C Port Protection | Smart Meter Power Supply |
Use Scenario: ESD and surge protection on VBUS and CC lines of USB-C receptacles. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS; bidirectional variant on CC line. Use Value: Meets USB-IF ESD requirements with <100pF capacitance, avoiding signal integrity loss at 10Gbps. |
Use Scenario: Securing AC/DC converter primary-side bias rails against lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-stage clamping after MOV/GDT, handling residual fast transients. Use Value: Provides precise 26V clamping to protect 33V-rated startup ICs, reducing BOM count by one discrete stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A | Same 16V VRWM but SMA package (larger footprint, RθJA = 100°C/W) | Limited to non-space-constrained industrial boards; lower surge repetition rate capability | Choose when legacy layout reuse is required and thermal margin ≥5°C/W is available |
| SMF4L16CA | Bidirectional version; identical VRWM, VBR, VC, and package | Required for AC-coupled or symmetrical signal lines (e.g., RS-485, CAN FD) | Substitute only if bipolar transient exposure exists; otherwise unidirectional offers lower leakage |
Compared with SMAJ16A and SMF4L16CA, SMF4L16A-7 delivers superior board-area efficiency and thermal performance in unidirectional DC protection, while SMF4L16CA extends functionality to bidirectional signal paths without sacrificing clamping precision or surge rating.
Availability
SMF4L16A-7 is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC I/O modules, USB-C power delivery systems, and smart meter power supplies requiring stable component supply across multi-year production cycles.
Supply support for SMF4L16A-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 manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q standards.
SMF4L16A-7 belongs to Diodes' SMF4L series of high-power, low-profile TVS diodes engineered specifically for space-constrained automotive and industrial transient suppression where 400W surge handling and ±30kV ESD robustness are mandatory.
FAQ
What is the maximum clamping voltage of SMF4L16A-7 at its rated peak pulse current?
The maximum clamping voltage (VC) is 26V at 15.3A peak pulse current (IPP), measured under the standard 10/1000µs double-exponential waveform. This value is guaranteed across temperature (−55°C to +175°C) and ensures downstream 3.3V/5V logic remains within safe operating limits during surge events.
Does SMF4L16A-7 meet automotive qualification requirements?
SMF4L16A-7 is manufactured in IATF 16949-certified facilities and qualified to JEDEC standards referenced in AEC-Q200. While not itself an AEC-Q200-graded part, it serves as the base for automotive-qualified variants (e.g., SMF4L16AQ) and supports PPAP documentation upon request for Tier-1 programs.
How does the DO-219AA package affect thermal performance compared to SMA?
Despite its smaller size, DO-219AA delivers RθJA = 96°C/W - 4°C/W better than standard SMA packages - due to optimized copper lead frame and direct die-to-pad thermal path. This allows higher surge repetition rates in thermally dense layouts without derating.
Can SMF4L16A-7 replace older SMAJ16A devices in existing designs?
Yes, with layout adaptation: SMF4L16A-7 fits the same electrical function but requires DO-219AA footprint (1.90 × 2.80 mm vs. SMA's 4.5 × 2.7 mm). Its lower RθJA and tighter VBR tolerance improve long-term reliability, though solder paste profile must be updated for the smaller thermal mass.
SMF4L16A-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L16A-7 FAQ
1.How can I place an order for SMF4L16A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L16A-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 SMF4L16A-7 reliable?
The price and inventory of SMF4L16A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L16A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L16A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L16A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L16A-7?
SMF4L16A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L16A-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 SMF4L16A-7?
For technical support, including SMF4L16A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L16A-7 requirements.
6.How does Aetrix verify that SMF4L16A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L16A-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 SMF4L16A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L16A-7?
All SMF4L16A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L16A-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 SMF4L16A-7 part is unused and in its original packaging.
Return procedure for SMF4L16A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L16A-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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Diodes Incorporated
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