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Diodes Incorporated SMF4L9.0A-7
- Part No.:
- SMF4L9.0A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L9.0A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,647
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Product details
Overview
SMF4L9.0A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) designed for clamping inductive and ESD transients on DC power rails and signal lines. It features a 9.0V working peak reverse voltage (VRWM), 10V minimum breakdown voltage (VBR), 15.4V maximum clamping voltage (VC) at 26A peak pulse current, and sub-1ns response time. It is used in automotive body control modules to protect LIN bus transceivers from load dump and ISO 7637-2 pulses.
For engineers reviewing the SMF4L9.0A-7 datasheet, SMF4L9.0A-7 pinout, SMF4L9.0A-7 application, or SMF4L9.0A-7 equivalent, this page delivers verified electrical parameters, DO-219AA package dimensions, IEC 61000-4-2 ±30kV ESD rating, thermal resistance (RθJA = 96°C/W), and direct replacement guidance against industry-standard TVS diodes with matched VRWM and PPK.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (10V min), it avalanches to divert surge current away from downstream circuitry while holding VC ≤15.4V at IPP = 26A. Its DO-219AA package enables high power density (400W @ 10/1000µs) in a 2.8mm × 1.9mm footprint with low thermal resistance (RθJC = 18°C/W).
It meets JEDEC reliability standards and supports automotive-grade applications via AEC-Q qualified variants (Q-suffix). Polarity is indicated by a cathode band; no band denotes bidirectional versions. Clamping performance is specified under standardized 10/1000µs waveform conditions per IEC 61643-31.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform); sustains single transient surges without degradation |
| Working Peak Reverse Voltage | 9.0V; maximum continuous DC or RMS voltage applied without conduction |
| Breakdown Voltage (VBR) | 10.0–11.1V @ 1mA; onset of avalanche clamping ensures predictable turn-on margin |
| Clamping Voltage (VC) | 15.4V @ 26A IPP; limits voltage seen by protected IC to safe level during surge |
| ESD Withstand | ±30kV air / ±30kV contact per IEC 61000-4-2; protects against human-body-model events |
| Thermal Resistance | RθJA = 96°C/W; defines junction-to-ambient temperature rise under steady-state 1W dissipation |
| Response Time | <1.0ns (unidirectional); enables protection before sensitive logic or analog circuits are damaged |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount plastic case (2.80 × 1.90 × 0.60 mm), matte tin-plated copper alloy leads, RoHS-compliant, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Current exit point during reverse avalanche | Marked with band; connected to protected line (e.g., 9V supply rail or LIN bus) |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power rating | Enables robust protection against ISO 7637-2 Pulse 1 (−150V/2Ω) and Pulse 5a (load dump) in 12V automotive systems |
| IEC 61000-4-2 ±30kV ESD immunity | Eliminates need for additional ESD protection stages on exposed connectors or buttons |
| DO-219AA low-profile package | Reduces PCB area by >30% vs. SMA/SMB; compatible with automated SMT placement and reflow |
| Sub-1ns response time | Clamps transients before propagation into microcontroller I/O pins or CAN/LIN transceivers |
| Lead-free, halogen-free "Green" construction | Meets global environmental compliance (RoHS 3, J-STD-020 Level 1) without derating or reliability trade-offs |
Applications
| Automotive Body Control Module | LIN Bus Interface Protection |
|---|---|
Use Scenario: Protecting 12V supply inputs and LIN transceiver pins against battery load dump and alternator ripple. IC Role / Device Role: Unidirectional shunt TVS placed between LIN line and ground, and across VCC/GND rails. Use Value: Limits clamped voltage to ≤15.4V, preventing damage to LIN transceivers rated for 18V absolute max. |
Use Scenario: Safeguarding LIN slave nodes (e.g., door module sensors) from ESD events during assembly or field service. IC Role / Device Role: Point-of-entry TVS on LIN data line, directly adjacent to connector. Use Value: Absorbs ±30kV contact discharge without latch-up or parametric shift in LIN transceiver bias networks. |
| Industrial Sensor Power Rail | USB-C Port VBUS Protection |
Use Scenario: Securing 9V auxiliary power input to analog sensor front-ends in factory automation equipment. IC Role / Device Role: Primary overvoltage clamp on isolated 9V DC-DC output feeding precision ADC reference circuits. Use Value: Maintains VRWM = 9.0V to avoid leakage-induced offset error while clamping surges to 15.4V. |
Use Scenario: Protecting USB-C VBUS line (5–20V) from hot-plug transients and external ESD coupling. IC Role / Device Role: Secondary TVS after primary fuse and common-mode choke; placed between VBUS and GND. Use Value: Provides 400W surge capacity with 15.4V clamping-well below USB PD 3.1 28V max VBUS tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Same VRWM (9.0V) and PPK (400W), but SMA package (4.5×2.7mm); RθJA = 65°C/W vs. 96°C/W | Higher thermal mass suits higher duty-cycle surges; larger footprint limits dense layout | Select if board space allows and thermal margin must exceed 30°C/W improvement |
| 1.5SMC9.0A | Same VRWM and clamping, but SMC package (7.1×6.2mm); 1.5kW rating; RθJA = 20°C/W | Over-specified for 400W needs; suited for repeated surge environments (e.g., motor drives) | Choose only when system-level testing confirms need for >1kW pulse handling or legacy SMC footprint reuse |
Compared with SMAJ9.0A and 1.5SMC9.0A, SMF4L9.0A-7 delivers identical electrical protection in a 57% smaller footprint and optimized for high-density automotive PCBs where thermal cycling dominates over single-pulse energy.
Availability
SMF4L9.0A-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C power delivery subsystems, and battery management systems requiring stable component supply across multi-year production cycles.
Supply support for SMF4L9.0A-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 to AEC-Q standards.
The SMF4L series belongs to Diodes' high-reliability TVS portfolio engineered specifically for automotive and industrial power-rail protection, emphasizing compact size, fast response, and guaranteed clamping performance under real-world surge waveforms.
FAQ
What is the polarity configuration of SMF4L9.0A-7?
SMF4L9.0A-7 is a unidirectional TVS diode, identified by a visible cathode band on the DO-219AA package. It conducts only during reverse-biased overvoltage events and blocks forward current up to 3V at 16A, making it suitable for DC rail protection where polarity is fixed.
Does SMF4L9.0A-7 meet AEC-Q200 requirements?
No - SMF4L9.0A-7 is a commercial-grade part. Diodes offers automotive-qualified equivalents with Q-suffix (e.g., SMF4L9.0AQ-7), which undergo AEC-Q200 stress testing, PPAP documentation, and are manufactured in IATF 16949-certified facilities.
Can SMF4L9.0A-7 be used in bidirectional signal-line protection?
No - its unidirectional structure lacks symmetrical clamping. For bidirectional lines like RS-485 or USB D+/D−, use the companion SMF4L9.0CA-7 variant, which has identical VRWM and clamping but symmetric breakdown in both polarities.
What is the maximum PCB pad temperature during reflow for SMF4L9.0A-7?
The DO-219AA package is rated for lead-free reflow per J-STD-020, with peak temperature of 260°C for ≤30 seconds. Recommended profile follows IPC/JEDEC J-STD-020D: preheat (150–200°C), soak (183–205°C), and peak (235–260°C) with ramp rates ≤3°C/s.
SMF4L9.0A-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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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
SMF4L9.0A-7 FAQ
1.How can I place an order for SMF4L9.0A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L9.0A-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 SMF4L9.0A-7 reliable?
The price and inventory of SMF4L9.0A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L9.0A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L9.0A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L9.0A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L9.0A-7?
SMF4L9.0A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L9.0A-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 SMF4L9.0A-7?
For technical support, including SMF4L9.0A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L9.0A-7 requirements.
6.How does Aetrix verify that SMF4L9.0A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L9.0A-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 SMF4L9.0A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L9.0A-7?
All SMF4L9.0A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L9.0A-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 SMF4L9.0A-7 part is unused and in its original packaging.
Return procedure for SMF4L9.0A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L9.0A-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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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