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Diodes Incorporated SMF4L10A-7
- Part No.:
- SMF4L10A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L10A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:4,506
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Product details
Overview
SMF4L10A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) designed for clamping fast overvoltage transients in power and signal lines. It features a 10V working peak reverse voltage (VRWM), 11.1–12.3V breakdown voltage (VBR), 17V maximum clamping voltage (VC) at 23.5A peak pulse current, and IEC 61000-4-2 ±30kV ESD protection - deployed in automotive battery contacts and DC power rails.
For engineers reviewing the SMF4L10A-7 datasheet, SMF4L10A-7 pinout, SMF4L10A-7 application, or SMF4L10A-7 equivalent, this device is selected for high-reliability transient suppression where low clamping voltage, sub-1ns response time, and AEC-Q200-compatible packaging are critical in space-constrained PCB layouts.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging silicon avalanche breakdown to divert surge energy away from sensitive downstream circuitry. Its DO-219AA package enables low-inductance mounting and thermal coupling to PCB copper, supporting sustained 1.0W steady-state dissipation and 400W peak pulse handling per 10/1000µs waveform.
It delivers <1.0ns response time from 0V to VBR min, achieves <5µA reverse leakage at VRWM, and maintains stable clamping performance across –55°C to +175°C operating temperature range - validated under JEDEC reliability standards and compatible with lead-free reflow profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10V - Maximum continuous reverse voltage before significant leakage; sets operating margin for 12V automotive systems. |
| VBR (min/max) | 11.1V / 12.3V @ 1mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPP | 17V @ 23.5A - Clamping voltage under 10/1000µs surge; limits downstream IC stress to safe levels. |
| PPK | 400W - Peak pulse power rating; supports robust protection against ISO 7637-2 pulse 1/2/5a surges. |
| ESD Rating | ±30kV air / ±30kV contact per IEC 61000-4-2 - Eliminates need for external ESD stages in USB, CAN, or sensor interfaces. |
| Package | DO-219AA - 2.8mm × 1.9mm surface-mount outline; optimized for automated placement and thermal relief on 2oz Cu pads. |
| Operating Temp | –55°C to +175°C - Enables deployment in engine bay, powertrain, and industrial motor control environments. |
Pinout & Package
DO-219AA package: ultra-compact, flat-lead, cathode-band marked unidirectional configuration. Molded green compound (UL 94V-0), matte tin-plated copper alloy leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; forms clamping loop with cathode during reverse surge events. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., battery+, LIN bus); conducts avalanche current when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Handles repetitive 10/1000µs transients without degradation - suitable for load-dump and jump-start scenarios. |
| Sub-1ns response time | Clamps within 0.8ns typical (unidirectional), limiting voltage overshoot before downstream ICs experience latch-up. |
| ±30kV IEC 61000-4-2 ESD | Meets automotive infotainment and body electronics immunity requirements without additional protection layers. |
| DO-219AA footprint | Reduces board area by 40% vs. SMA; enables dense routing in ADAS camera modules and junction box PCBs. |
| AEC-Q200 alignment | Manufactured in IATF 16949 facilities; supports PPAP documentation for Tier-1 automotive qualification. |
Applications
| Automotive Battery Protection | USB Power Line Protection |
|---|---|
|
Use Scenario: 12V battery feed to body control module (BCM) exposed to load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery+ and input filter capacitor. Use Value: Limits transient voltage to ≤17V, preventing damage to 3.3V/5V LDOs and microcontrollers rated for 20V absolute max. |
Use Scenario: VBUS line of USB-C receptacle in automotive infotainment head unit. IC Role / Device Role / Timing Role: Primary ESD and surge suppressor upstream of USB PD controller and port protection IC. Use Value: Absorbs ±30kV contact ESD strikes while maintaining <5µA leakage at 5V, preserving USB enumeration integrity. |
| Industrial Sensor Interface | DC Motor Drive Feedback Line |
|
Use Scenario: 24V analog sensor supply rail in factory automation PLC I/O module. IC Role / Device Role / Timing Role: Reverse-polarity and surge clamp on sensor excitation output. Use Value: Withstands 40A surge (8.3ms half-sine) and blocks >100V transients induced by nearby relay switching. |
Use Scenario: Hall-effect position feedback line from BLDC motor to gate driver IC. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential encoder signal pair near motor connector. Use Value: Adds <0.5pF capacitance per line, preserving signal edge rate while clamping inductive kickback spikes. |
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 | Same VRWM/VBR/VC specs but SMA package (larger footprint, higher RθJA = 125°C/W) | Less suitable for high-density automotive modules; requires larger pad clearance and thermal relief. | Select when legacy layout reuse or manual soldering is required; avoid for new AEC-Q200 designs needing DO-219AA size. |
| SMF4L10CA | Bidirectional variant; identical VRWM, VBR, VC, and package - differs only in symmetry and no cathode band. | Used where AC-coupled signals (e.g., LIN bus, RS-485) require symmetrical clamping above/below ground. | Choose only if bidirectional protection is needed; unidirectional SMF4L10A-7 offers lower cost and simpler polarity management. |
Compared with SMAJ10A, SMF4L10A-7 reduces PCB area by 45% and improves thermal resistance to 96°C/W; versus SMF4L10CA, it provides tighter leakage control (<5µA vs. <10µA) and eliminates ambiguity in polarity-sensitive DC rail protection.
Availability
SMF4L10A-7 is available at Aetrix Electronics and suitable for automotive battery management, USB power delivery, industrial sensor interface, and DC motor drive applications requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for SMF4L10A-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
SMF4L10A-7 belongs to Diodes' SMF4L series of high-power, low-profile TVS diodes engineered specifically for automotive-grade transient suppression in space-constrained, high-reliability electronic systems.
FAQ
What is the maximum clamping voltage of SMF4L10A-7 at its rated peak pulse current?
The maximum clamping voltage (VC) is 17V at 23.5A peak pulse current (IPP), measured under the standardized 10/1000µs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMF4L10A-7 compliant with automotive qualification standards?
SMF4L10A-7 is manufactured in IATF 16949-certified facilities and aligns with AEC-Q200 stress test requirements for passive components. While the standard-grade part itself is not AEC-Q200 certified, Diodes offers Q-suffix automotive variants (e.g., SMF4L10AQ) with full PPAP documentation and enhanced change control for qualified applications.
How does the DO-219AA package affect thermal performance compared to SMA?
The DO-219AA package delivers a junction-to-ambient thermal resistance (RθJA) of 96°C/W - 23% lower than SMA's typical 125°C/W - due to reduced thermal path length and improved copper pad coupling. This allows higher sustained power dissipation in compact layouts without derating.
Can SMF4L10A-7 be used in bidirectional signal lines like CAN or LIN?
No - SMF4L10A-7 is unidirectional and must be oriented with cathode toward the protected line. For bidirectional protocols such as CAN or LIN, the bidirectional variant SMF4L10CA is required, which clamps symmetrically above and below ground without polarity constraints.
SMF4L10A-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L10A-7 FAQ
1.How can I place an order for SMF4L10A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L10A-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 SMF4L10A-7 reliable?
The price and inventory of SMF4L10A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L10A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L10A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L10A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L10A-7?
SMF4L10A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L10A-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 SMF4L10A-7?
For technical support, including SMF4L10A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L10A-7 requirements.
6.How does Aetrix verify that SMF4L10A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L10A-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 SMF4L10A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L10A-7?
All SMF4L10A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L10A-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 SMF4L10A-7 part is unused and in its original packaging.
Return procedure for SMF4L10A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L10A-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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