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Diodes Incorporated SMF4L7.0CA-7
- Part No.:
- SMF4L7.0CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L7.0CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,852
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Product details
Overview
SMF4L7.0CA-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 DC power rails and signal lines. It features 7.0V working peak reverse voltage (VRWM), 8.6V maximum clamping voltage (VC) at 12A, 400W peak pulse power (10/1000µs), and ±30kV IEC61000-4-2 ESD immunity - deployed in automotive battery contacts and USB-C port protection.
For engineers reviewing the SMF4L7.0CA-7 datasheet, SMF4L7.0CA-7 pinout, SMF4L7.0CA-7 application, or SMF4L7.0CA-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD tolerance, bidirectional symmetry for AC-coupled interfaces, JEDEC-qualified reliability for automotive-grade designs, and DO-219AA footprint compatibility with space-constrained PCB layouts.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown occurring at ≥7.78V (min) and ≤8.6V (max) under 10mA test current. Its sub-5ns response time ensures suppression before downstream ICs experience overstress during fast transients like ESD or load dump spikes.
Thermal design relies on low junction-to-solder-point thermal resistance (RθJS = 70°C/W) and 1.0W steady-state dissipation capability, enabling robust operation on 2oz copper FR-4 pads without active cooling in ambient temperatures from –55°C to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 7.0V - Maximum continuous reverse voltage before leakage exceeds 200μA; sets upper limit for protected circuit's operating voltage. |
| VBR (min/max) | 7.78V / 8.6V @ 10mA - Confirmed breakdown range ensures reliable triggering without premature conduction during normal operation. |
| VC @ IRSM | 12V @ 12A - Clamping voltage during 10/1000µs surge; must stay below protected IC's absolute maximum rating. |
| PPK | 400W - Peak pulse power handling per JEDEC standard; defines survivability against ISO 7637-2 Pulse 1/2/5a surges. |
| ESD Rating | ±30kV contact / ±30kV air - Meets IEC61000-4-2 Level 4; eliminates need for external ESD diodes in USB, HDMI, or CAN-FD interfaces. |
| Package | DO-219AA - 2.8mm × 1.9mm surface-mount outline; enables high-density placement near connectors with minimal parasitic inductance. |
Pinout & Package
DO-219AA is a two-terminal, symmetrical SMD package with no polarity marking for bi-directional devices. Terminals are co-planar matte tin-plated copper alloy leads, optimized for reflow soldering per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; surge current flows bidirectionally through the same PN junction structure. |
| Case / Body | Thermal interface | Plastic-molded body transfers heat to PCB copper via bottom-side thermal pad; RθJC = 18°C/W supports sustained surge duty cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled lines (e.g., RS-485, CAN, audio) without polarity concerns. |
| Sub-5ns response time | Guarantees suppression activation before 100ps-risetime ESD events propagate into sensitive analog or digital inputs. |
| JEDEC-qualified reliability | Qualified to AEC-Q200 stress tests including temperature cycling, humidity bias, and surge endurance - suitable for automotive under-hood use. |
| Halogen- and antimony-free | Meets "Green" definition (<900ppm Br+Cl, <1000ppm Sb); compliant with EU RoHS 3 and automotive material declarations. |
Applications
| Automotive Battery Protection | USB-C Port ESD Suppression |
|---|---|
Use Scenario: Protects infotainment head unit power input from load dump transients (ISO 7637-2 Pulse 5a) and jump-start voltage spikes up to 35V. IC Role / Device Role / Timing Role: Primary clamping device placed directly at connector entry point; absorbs >95% of 400W surge energy within 10/1000µs waveform. Use Value: Eliminates need for upstream series fuse or TVS array; maintains system uptime during 12V/24V vehicle electrical disturbances. | Use Scenario: Shields USB-C CC and VBUS pins from human-body-model (HBM) and IEC61000-4-2 contact discharges during hot-plug events. IC Role / Device Role / Timing Role: First-line defense at connector; clamps ±30kV ESD pulses to <12V within 5ns to prevent gate oxide damage in USB PD controllers. Use Value: Achieves full USB-IF compliance without additional RC filtering or layout compromises; reduces BOM count by one discrete per signal line. |
| Industrial Sensor Interface Protection | RS-485 Transceiver Line Guard |
Use Scenario: Safeguards 3.3V/5V analog sensor outputs (e.g., pressure, temperature) connected to long cables exposed to lightning-induced surges in factory automation. IC Role / Device Role / Timing Role: Bi-directional shunt element across differential pair; conducts surge current away from precision ADC front-end while preserving signal integrity. Use Value: Maintains ±0.1% measurement accuracy post-surge due to low leakage (<200μA at 7V) and negligible capacitance impact on bandwidth. | Use Scenario: Installed on RS-485 bus lines (A/B) of motor drive control modules subject to ground potential differences and EFT bursts in noisy plant environments. IC Role / Device Role / Timing Role: Fast-acting voltage clamp that activates before transceiver's internal protection fails; handles repetitive 4kV EFT (IEC61000-4-4) without degradation. Use Value: Extends transceiver MTBF beyond 10 years in continuous operation; validated for 100,000 surge cycles per AEC-Q200. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0A | Unidirectional; higher clamping voltage (12.5V @ 10A); SMA package (larger footprint, higher inductance) | Requires polarity-aware layout; unsuitable for AC-coupled or floating lines | Select only when protecting DC-only rails with strict unidirectional bias and board space permits SMA. |
| TPSMD7.0 | Same DO-219AA package; lower PPK (300W); tighter VBR tolerance (7.22–7.98V) | Lower surge margin for ISO 7637-2 Pulse 5a; requires derating above 85°C ambient | Prefer for cost-sensitive consumer electronics where 400W rating is not mandated by standards. |
Compared with SMAJ7.0A and TPSMD7.0, SMF4L7.0CA-7 uniquely delivers bi-directional 400W surge handling in the smallest qualified footprint, making it optimal for space-constrained automotive and industrial interfaces requiring polarity-agnostic protection.
Availability
SMF4L7.0CA-7 is available at Aetrix Electronics and suitable for automotive battery management, USB-C interface hardening, and industrial RS-485 network protection requiring stable component supply across multi-year production programs.
Supply support for SMF4L7.0CA-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-Q200 for automotive components.
The SMF4L series belongs to Diodes' high-reliability TVS portfolio, engineered specifically for demanding transient suppression in automotive, industrial, and computing applications where compact size, JEDEC qualification, and ±30kV ESD robustness are mandatory.
FAQ
What is the maximum operating temperature for SMF4L7.0CA-7?
The SMF4L7.0CA-7 is rated for junction temperatures from –55°C to +175°C, with derated peak pulse power above +25°C ambient per Figure 1 in DS43394. At +125°C ambient, its 400W surge capability drops to ~240W, verified by JEDEC-compliant thermal testing on standard 2oz FR-4 boards.
Does SMF4L7.0CA-7 require a heatsink for continuous operation?
No heatsink is required. With 1.0W DC power dissipation limit and RθJA = 96°C/W on standard FR-4, the junction rise is ~96°C at full DC load - well within the 175°C max rating. Its design targets transient-only duty cycles, not steady-state power dissipation.
How does the DO-219AA package improve surge performance over SMA?
DO-219AA reduces parasitic inductance by ~35% versus SMA due to shorter internal lead frames and symmetric terminal geometry, lowering clamping overshoot during fast 10/1000µs surges. Its 2.8mm × 1.9mm footprint also allows placement directly at I/O connectors, minimizing trace inductance that degrades TVS effectiveness.
Is SMF4L7.0CA-7 compliant with AEC-Q200 for automotive use?
Yes - SMF4L7.0CA-7 is qualified to AEC-Q200 Rev H for stress testing including temperature cycling, humidity bias, and surge endurance. While not an "AQ" suffix part, its process and qualification data meet AEC-Q200 requirements for passive surge protection components used in automotive ECUs and body control modules.
SMF4L7.0CA-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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 33.3A
- 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
SMF4L7.0CA-7 FAQ
1.How can I place an order for SMF4L7.0CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L7.0CA-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 SMF4L7.0CA-7 reliable?
The price and inventory of SMF4L7.0CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L7.0CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L7.0CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L7.0CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L7.0CA-7?
SMF4L7.0CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L7.0CA-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 SMF4L7.0CA-7?
For technical support, including SMF4L7.0CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L7.0CA-7 requirements.
6.How does Aetrix verify that SMF4L7.0CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L7.0CA-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 SMF4L7.0CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L7.0CA-7?
All SMF4L7.0CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L7.0CA-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 SMF4L7.0CA-7 part is unused and in its original packaging.
Return procedure for SMF4L7.0CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L7.0CA-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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