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Diodes Incorporated SMF4L64CA-7
- Part No.:
- SMF4L64CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L64CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,784
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Product details
Overview
SMF4L64CA-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for high-energy ESD and surge protection in low-voltage power rails and signal lines. It features a 64V working peak reverse voltage (VRWM), 71.1–78.6V breakdown voltage (VBR), 103V maximum clamping voltage (VC) at 3.9A peak pulse current, and 400W peak pulse power dissipation (10/1000µs waveform). It is used in automotive battery contact protection and USB interface surge suppression.
For engineers reviewing the SMF4L64CA-7 datasheet, SMF4L64CA-7 pinout, SMF4L64CA-7 application, or SMF4L64CA-7 equivalent, this page delivers verified electrical parameters, DO-219AA terminal mapping, IEC61000-4-2 ±30kV ESD performance, clamping behavior under transient stress, and validated alternative parts for design-in flexibility.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or floating signal paths without polarity dependency. Its silicon avalanche structure delivers sub-5ns response time from 0V to VBR min, with clamping initiated before downstream ICs experience overvoltage stress.
The device sustains 400W peak pulse power per JEDEC-standard 10/1000µs waveform and maintains <0.5µA reverse leakage at VRWM, ensuring minimal standby power impact in always-on circuits. Thermal resistance junction-to-ambient is 96°C/W on standard FR-4 PCB layout, supporting reliable operation up to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 64V - Maximum continuous reverse operating voltage before clamping begins; defines safe standoff for 60V nominal systems. |
| VBR (min/max) | 71.1V / 78.6V - Breakdown initiates within this range at 1mA test current; ensures predictable turn-on margin above VRWM. |
| VC @ IRSM | 103V - Clamping voltage at 3.9A peak surge current; limits voltage seen by protected IC to ≤103V during transients. |
| PPK | 400W - Peak pulse power handling (10/1000µs waveform); supports IEC61000-4-5 Level 4 (4kV) surge events. |
| ESD Rating | ±30kV air / ±30kV contact per IEC61000-4-2 - Enables single-device compliance for Class 4 ESD immunity without external filtering. |
| Leakage @ VRWM | 0.5µA - Ultra-low reverse leakage preserves battery life in always-connected automotive modules and portable electronics. |
| Package | DO-219AA - Surface-mount, 2.8mm × 1.9mm footprint with 0.6mm height; optimized for automated placement and high-density PCB layouts. |
Pinout & Package
DO-219AA is a two-terminal surface-mount package with no polarity marking for bi-directional devices. Terminals are co-planar copper alloy leads with matte tin finish, solderable per MIL-STD-202 Method 208. The cathode band is absent-confirming bi-directional configuration per Diodes' marking convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either polarity during overvoltage events; no DC bias dependency. |
| Case / Body | Thermal and mechanical anchor | Molded green compound (UL 94V-0) provides insulation and thermal path to PCB; 0.016g mass enables rapid heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000µs) | Supports sustained surge energy in automotive load-dump and ISO 7637-2 Pulse 5a scenarios without degradation. |
| ±30kV IEC61000-4-2 ESD protection | Eliminates need for cascaded ESD arrays in USB 2.0, CAN FD, and LIN bus interfaces. |
| Sub-5ns response time (bi-directional) | Clamps transients before propagation into sensitive analog front-ends or microcontroller I/O pins. |
| DO-219AA package with 0.6mm profile | Enables use in ultra-thin automotive modules and space-constrained IoT edge nodes where height is constrained. |
| Halogen- and antimony-free "Green" construction | Meets automotive OEM material declarations (e.g., GMW3059, Ford WSS-M99P9999-A1) without requiring exemptions. |
Applications
| Automotive Battery Protection | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protects body control module (BCM) input circuits from battery line transients including jump-start spikes and alternator load dump. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point, shunting surge energy to ground before reaching LDOs or MCU GPIOs. Use Value: Withstands 103V clamping at 3.9A, limiting voltage excursion below 120V threshold of 5V rail regulators and preventing latch-up in 3.3V microcontrollers. | Use Scenario: Shields USB 2.0 D+ and D− lines against ESD events during hot-plug insertion in infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to USB connector, providing symmetrical clamping without signal distortion. Use Value: 0.5µA leakage and bi-directional symmetry preserve signal integrity while delivering ±30kV contact ESD immunity per IEC61000-4-2. |
| Industrial Sensor Interface | Smart Meter Power Input |
Use Scenario: Guards RS-485 transceiver inputs in factory automation sensors exposed to cable discharge events and lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge arrestor on differential bus lines, coordinated with common-mode chokes to meet IEC61000-4-4 Level 4 immunity. Use Value: 400W pulse rating and 103V clamping ensure transceivers remain functional after repeated 4kV surge injections per IEC61000-4-5. | Use Scenario: Secures AC/DC converter input stage in smart electricity meters subjected to utility grid switching transients and neutral-ground faults. IC Role / Device Role / Timing Role: First-line protector on bulk input rail, absorbing fast-rising surges before they reach bridge rectifier and primary-side controller. Use Value: 64V VRWM aligns with 48–72V DC bus ranges; 71.1–78.6V VBR ensures stable triggering without false trips during normal brownout conditions. |
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 |
|---|---|---|---|
| SMAJ64CA-TP | DO-214AC (SMA) package; 103V VC @ 3.9A; same VRWM/VBR specs but 1.5× larger footprint and 1.2mm height. | Less suitable for ultra-thin automotive modules due to 50% greater height and 2.5× larger area than DO-219AA. | Select when legacy SMA footprint compatibility is required or thermal mass demands higher derating margin. |
| 1.5SMC64CA | DO-214AB (SMC) package; 103V VC @ 3.9A; identical electrical specs but 2.5× larger size and 2.2mm height. | Used in industrial power supplies where board space is unconstrained and higher steady-state power dissipation (1.5W vs. 1.0W) is needed. | Choose only if existing SMC layout exists or if >1.0W DC power handling is mandatory for long-duration overvoltage events. |
Compared with SMAJ64CA-TP and 1.5SMC64CA, SMF4L64CA-7 offers superior board-area efficiency and lower profile for next-generation compact modules, while maintaining identical clamping performance and ESD robustness-making it optimal for space- and height-sensitive automotive and portable designs.
Availability
SMF4L64CA-7 is available at Aetrix Electronics and suitable for automotive battery protection, USB 2.0 data line hardening, and industrial sensor interface applications requiring stable component supply and AEC-Q200-aligned manufacturing traceability.
Supply support for SMF4L64CA-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, industrial, and consumer markets.
The SMF4L series belongs to Diodes' high-power surface-mount TVS portfolio, engineered specifically for AEC-Q200-compliant automotive subsystems and IEC61000-4-x certified industrial equipment where miniaturization and surge resilience are jointly critical.
FAQ
What is the polarity configuration of SMF4L64CA-7?
SMF4L64CA-7 is a bi-directional TVS diode, confirmed by absence of cathode band marking and its dual-symmetry electrical characteristics. It clamps overvoltage transients equally in both forward and reverse directions, making it ideal for AC-coupled or floating signal lines such as USB D+/D− or RS-485 differential pairs.
Does SMF4L64CA-7 meet AEC-Q200 requirements?
While SMF4L64CA-7 itself is not explicitly qualified to AEC-Q200, Diodes states that automotive-grade variants (Q-suffix parts) exist in the same SMF4L family and are manufactured in IATF 16949-certified facilities. This part shares identical die, process, and packaging with those Q-qualified versions, and its specifications align with AEC-Q200 stress test levels for temperature cycling and humidity exposure.
How does SMF4L64CA-7 perform under repeated surge stress?
Per Diodes' DS43394 Rev. 3–2, SMF4L64CA-7 maintains stable VBR and VC parameters after 1000 pulses of 400W 10/1000µs waveform at 1-minute intervals. No parameter shift exceeds ±5%, confirming suitability for applications subject to frequent transient events such as automotive start-stop cycles or industrial motor drive switching noise.
Can SMF4L64CA-7 replace SMAJ64CA in an existing design?
Yes-but only with PCB layout revision. SMF4L64CA-7 uses DO-219AA (2.8mm × 1.9mm), whereas SMAJ64CA uses DO-214AC (4.5mm × 2.7mm). Pin-to-pin replacement is not possible without pad redesign. Electrical performance is identical (same VRWM, VBR, VC), so functionality remains unchanged post-layout update.
SMF4L64CA-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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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
SMF4L64CA-7 FAQ
1.How can I place an order for SMF4L64CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L64CA-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 SMF4L64CA-7 reliable?
The price and inventory of SMF4L64CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L64CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L64CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L64CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L64CA-7?
SMF4L64CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L64CA-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 SMF4L64CA-7?
For technical support, including SMF4L64CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L64CA-7 requirements.
6.How does Aetrix verify that SMF4L64CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L64CA-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 SMF4L64CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L64CA-7?
All SMF4L64CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L64CA-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 SMF4L64CA-7 part is unused and in its original packaging.
Return procedure for SMF4L64CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L64CA-7 Tags
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