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Diodes Incorporated SMF4L6.5CA-7
- Part No.:
- SMF4L6.5CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L6.5CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,189
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Product details
Overview
SMF4L6.5CA-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for robust ESD and surge protection on low-voltage signal and power lines. It features a 6.5V working peak reverse voltage (VRWM), 7.22V minimum breakdown voltage (VBR), 11.2V maximum clamping voltage (VC) at 35.7A peak pulse current, and 400W peak pulse power dissipation (10/1000µs waveform). It is used in automotive battery contacts and USB interface protection.
For engineers reviewing the SMF4L6.5CA-7 datasheet, SMF4L6.5CA-7 pinout, SMF4L6.5CA-7 application, or SMF4L6.5CA-7 equivalent, key selection criteria include clamping voltage under 35.7A surge, bi-directional polarity for AC-coupled lines, IEC61000-4-2 ±30kV ESD rating, DO-219AA footprint compatibility, and AEC-Q200 suitability via automotive-grade variants.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical breakdown and clamping characteristics in forward and reverse directions. Its silicon avalanche structure enables sub-5ns response time and stable clamping performance up to 175°C junction temperature.
The device is optimized for low-capacitance transient suppression without signal distortion on high-speed lines - typical junction capacitance is not specified in the datasheet, but its DO-219AA package and 6.5V VRWM target 3.3V–5V rail protection where fast turn-on and minimal leakage (<500µA at VRWM) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.5V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected line voltage. |
| VBR (min) | 7.22V @ 10mA - Guaranteed avalanche onset threshold; ensures reliable triggering above normal operating margin. |
| VC (max) | 11.2V @ 35.7A - Peak clamped voltage during 10/1000µs surge; defines worst-case overvoltage seen by downstream ICs. |
| PPK | 400W - Peak pulse power handling per 10/1000µs waveform; supports high-energy transients like ISO 7637-2 pulse 1/2/5a. |
| IR @ VRWM | 500µA max - Reverse leakage at rated working voltage; low enough to avoid loading 3.3V/5V logic rails. |
| ESD Rating | ±30kV contact / ±30kV air (IEC61000-4-2) - Full system-level ESD immunity without external shielding or filtering. |
Pinout & Package
Package: DO-219AA - surface-mount, flat lead, cathode-bandless bi-directional configuration; 1.90mm width × 2.80mm length × 0.60mm height; RoHS-compliant matte tin finish on copper alloy lead frame.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Transient current entry (reverse polarity) | One terminal of symmetrical avalanche junction; accepts surge current from either direction. |
| Cathode 1 | Transient current exit (reverse polarity) | Paired terminal completing bi-directional path; no physical cathode band - device is inherently symmetrical. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Identical VBR and VC in both polarities - eliminates need for polarity-aware layout on differential or AC-coupled lines. |
| Fast response time | <5.0ns turn-on from 0V to VBR - intercepts ESD events before sensitive ICs experience overstress. |
| High surge robustness | 400W peak power (10/1000µs) - withstands repetitive load dump and inductive switching transients in automotive environments. |
| Green packaging | Halogen- and antimony-free, UL 94V-0 molded compound - meets automotive and industrial environmental compliance requirements. |
Applications
| Automotive Battery Protection | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting 12V battery feed lines in infotainment head units against load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to shunt transients before reaching PMIC or MCU power inputs. Use Value: Clamps to ≤11.2V at 35.7A, preventing damage to 12V-tolerant regulators while maintaining <500µA leakage at nominal battery voltage. |
Use Scenario: Safeguarding D+ and D− lines of USB 2.0 ports against ESD events during cable insertion and hot-plug operations. IC Role / Device Role / Timing Role: Bi-directional TVS placed in series with each data line, leveraging symmetry to protect against both positive and negative ESD strikes. Use Value: Sub-5ns response ensures clamping occurs before USB transceiver input structures fail, with ±30kV IEC61000-4-2 compliance verified. |
| Industrial Sensor Interface | Smartphone Charging Port |
Use Scenario: Shielding 4–20mA or RS-485 transceivers connected to field wiring exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line transient suppressor mounted adjacent to connector, absorbing energy before it reaches isolation barrier or signal conditioning circuitry. Use Value: 400W pulse rating handles multi-kV induced transients; DO-219AA footprint allows compact placement near PCB edge without compromising creepage. |
Use Scenario: Protecting USB-C CC and VBUS pins in portable devices against user-handling ESD and accidental short-to-VBUS events. IC Role / Device Role / Timing Role: Bi-directional clamp on bidirectional CC line and unidirectional variant on VBUS, ensuring full-system ESD resilience. Use Value: 6.5V VRWM aligns with USB-C VCONN and CC logic levels; 500µA leakage avoids false detection or power drain in sleep mode. |
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 |
|---|---|---|---|
| SMAJ6.5CA | DO-214AC package; higher RθJA (110°C/W); 600W PPK; 11.2V VC @ 33.3A | Larger footprint; lower surge current density; less suitable for space-constrained automotive modules | Select when legacy SMA layout exists and higher pulse power margin is required over compactness. |
| TPSMD6.5C | DO-214AB package; 400W PPK; 11.2V VC @ 35.7A; tighter VBR tolerance (7.22–7.98V vs. 7.22–7.98V same) | Same electrical specs but larger body; slightly higher thermal resistance; non-automotive qualified base version | Prefer if existing design uses SMB/SMA footprints and JEDEC qualification suffices without AEC-Q200 traceability. |
Compared with SMAJ6.5CA and TPSMD6.5C, SMF4L6.5CA-7 delivers identical clamping performance in a 30% smaller DO-219AA package, enabling denser routing near connectors and improved thermal coupling to PCB copper - critical for sustained surge duty cycles in automotive ECUs.
Availability
SMF4L6.5CA-7 is available at Aetrix Electronics and suitable for automotive battery protection, USB 2.0 data line protection, and industrial sensor interface applications requiring stable component supply and long-term lifecycle support.
Supply support for SMF4L6.5CA-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 North America.
This part belongs to Diodes' SMF4L family of ultra-compact surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in space-constrained automotive, industrial, and consumer interfaces where low leakage and fast response are mandatory.
FAQ
Is SMF4L6.5CA-7 unidirectional or bi-directional?
SMF4L6.5CA-7 is a bi-directional TVS diode, confirmed by its "CA" suffix, absence of cathode band marking, and symmetrical electrical characteristics in both polarities. Its VBR min/max and VC values are identical for forward and reverse conduction, making it suitable for AC-coupled or differential signal lines like USB D+/D− or RS-485 A/B.
What is the maximum operating temperature for SMF4L6.5CA-7?
The SMF4L6.5CA-7 has an operating junction temperature range of –55°C to +175°C, validated per JEDEC standards referenced in AEC-Q200. At +125°C ambient, derating reduces peak pulse current to ~75% of the 25°C value (35.7A), per Figure 1 in DS43394 Rev. 3–2.
Does SMF4L6.5CA-7 meet AEC-Q200 requirements?
The base SMF4L6.5CA-7 is not AEC-Q200 qualified; however, Diodes offers automotive-grade variants with "Q" suffix (e.g., SMF4L6.5CAQ-7) that are PPAP-capable, manufactured in IATF 16949-certified facilities, and fully qualified to AEC-Q200. These are listed on Diodes' automotive products page.
How does SMF4L6.5CA-7 compare to SMF4L6.5A-7?
SMF4L6.5CA-7 is bi-directional; SMF4L6.5A-7 is unidirectional. The "C" denotes bi-directional construction, resulting in identical VBR and VC in both directions, whereas the unidirectional version conducts only in reverse bias and requires correct orientation in-circuit. Both share DO-219AA package and 400W rating.
SMF4L6.5CA-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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 35.7A
- 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
SMF4L6.5CA-7 FAQ
1.How can I place an order for SMF4L6.5CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L6.5CA-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 SMF4L6.5CA-7 reliable?
The price and inventory of SMF4L6.5CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L6.5CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L6.5CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L6.5CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L6.5CA-7?
SMF4L6.5CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L6.5CA-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 SMF4L6.5CA-7?
For technical support, including SMF4L6.5CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L6.5CA-7 requirements.
6.How does Aetrix verify that SMF4L6.5CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L6.5CA-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 SMF4L6.5CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L6.5CA-7?
All SMF4L6.5CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L6.5CA-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 SMF4L6.5CA-7 part is unused and in its original packaging.
Return procedure for SMF4L6.5CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L6.5CA-7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
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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