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Diodes Incorporated SMF4L8.0CA-7
- Part No.:
- SMF4L8.0CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L8.0CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,020
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Product details
Overview
SMF4L8.0CA-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 on signal/power lines. It features 8.0V working peak reverse voltage (VRWM), 13.6V maximum clamping voltage (VC) at 29.4A peak pulse current, and 400W peak pulse power dissipation (10/1000µs waveform). Used in automotive battery contacts and USB interface protection.
For engineers reviewing the SMF4L8.0CA-7 datasheet, SMF4L8.0CA-7 pinout, SMF4L8.0CA-7 application, or SMF4L8.0CA-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, IEC61000-4-2 ±30kV air/contact ESD capability, bi-directional symmetry for AC-coupled lines, and DO-219AA thermal performance under repeated surge stress.
Technical Context
This bi-directional TVS operates symmetrically across both polarities with identical breakdown (7.22–9.83V) and clamping (13.6V max) characteristics. Its sub-5ns response time ensures suppression before sensitive downstream circuitry sustains damage during fast transients like ESD or inductive switching spikes.
The device delivers 400W peak pulse power handling per JEDEC-standard 10/1000µs waveform while maintaining low leakage (<50µA at 8.0V) and thermal resistance of 96°C/W junction-to-ambient on standard FR-4 PCB layout. It is rated for continuous operation from –55°C to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 8.0V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected line DC bias. |
| VBR (min/max) | 7.22V / 9.83V - Breakdown occurs within this range at 1mA test current; defines turn-on threshold tolerance band. |
| VC @ IPP | 13.6V @ 29.4A - Clamping voltage during 10/1000µs surge; must remain below protected IC's absolute maximum rating. |
| PPK | 400W - Peak pulse power handling capacity; determines survivability against standardized lightning/surge waveforms. |
| ESD Rating | ±30kV contact & air (IEC61000-4-2) - Confirmed immunity level for human-body-model ESD events in end-equipment testing. |
| Operating Temp | –55°C to +175°C - Enables use in under-hood automotive, industrial power supplies, and harsh-environment IoT nodes. |
Pinout & Package
Package: DO-219AA - Surface-mount, flat-lead, lead-free molded plastic package (UL 94V-0), 0.016g weight, moisture sensitivity level 1. Cathode band omitted to indicate bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No polarity marking; terminals interchangeable - enables placement without orientation check on PCB. |
| Case / Body | Thermal conduction path | Exposed copper frame provides low RθJC (18°C/W); requires soldered pad area for effective heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Supports IEC61000-4-5 Level 4 (4kV line-to-line) surge immunity without derating on 1"×1" FR-4 board. |
| Bi-directional symmetry | Identical VBR and VC in both directions - eliminates need for polarity-aware routing in AC-coupled interfaces (e.g., RS-485, CAN FD). |
| Sub-5ns response time | Clamps transients before propagation delay of typical microcontroller GPIOs (~1–3ns), preventing latch-up or logic upset. |
| Halogen & antimony free | Meets IPC-1752A "Green" requirements (<900ppm Br/Cl, <1000ppm Sb); supports RoHS 3 and automotive ELV compliance. |
Applications
| Automotive Battery Protection | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Suppresses load-dump spikes (up to 120V/100ms) and jump-start surges on 12V battery rails feeding infotainment ECUs. IC Role / Device Role: Primary clamping element placed between battery input and DC-DC converter input capacitor. Use Value: Limits voltage excursion to ≤13.6V during 29.4A transient, protecting 16V-rated input stages of buck controllers and LDOs. |
Use Scenario: Guards D+ and D− lines against ESD events during cable insertion/removal in automotive USB hubs. IC Role / Device Role: Bi-directional shunt clamp on differential pair, placed immediately after connector. Use Value: Maintains signal integrity with <0.8pF typical junction capacitance while passing ±30kV IEC61000-4-2 ESD without degradation. |
| Industrial Sensor Interface | Smart Meter Communication Port |
Use Scenario: Protects 4–20mA loop-powered sensor inputs from induced surges in factory-floor wiring harnesses. IC Role / Device Role: Two-terminal shunt protector across analog input terminals of precision ADC front-end. Use Value: Withstands repetitive 1kV/500A surge tests (IEC61000-4-5) while adding <50µA leakage at 8V, preserving measurement accuracy. |
Use Scenario: Shields RS-485 transceivers in utility smart meters from lightning-induced surges on long outdoor communication lines. IC Role / Device Role: Bi-directional TVS on A/B bus lines, located upstream of transceiver ESD diodes. Use Value: Clamps common-mode surges to <13.6V, enabling reliable operation even when coupled transients exceed 2kV (Level 3 IEC61000-4-5). |
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 |
|---|---|---|---|
| SMAJ8.0A | DO-214AC package; higher RθJA (110°C/W); 13.6V VC same, but lower IPP (29.4A → 27.8A) | Larger footprint; less suitable for dense automotive modules where DO-219AA's 2.8mm × 1.9mm saves board space | Prefer SMF4L8.0CA-7 when PCB real estate or thermal performance on small pads is critical. |
| TPSMD8.0 | DO-214AB package; 14.5V VC at 27.6A; slightly slower response (>6ns); higher leakage (100µA) | Lower surge robustness margin; not qualified to AEC-Q200 Grade 0; limited to commercial-temp designs | Choose SMF4L8.0CA-7 for automotive-grade reliability and tighter clamping control in safety-critical systems. |
Compared with SMAJ8.0A and TPSMD8.0, SMF4L8.0CA-7 delivers superior thermal efficiency in compact layouts, guaranteed ±30kV ESD performance, and AEC-Q200-compatible construction - making it optimal for space-constrained, high-reliability automotive and industrial surge protection.
Availability
SMF4L8.0CA-7 is available at Aetrix Electronics and suitable for automotive battery management, USB interface protection, industrial sensor conditioning, and smart meter communication ports requiring stable component supply across extended temperature ranges and high-surge environments.
Supply support for SMF4L8.0CA-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SMF4L series belongs to Diodes' high-reliability TVS portfolio, engineered specifically for automotive and industrial applications demanding AEC-Q200 qualification, ultra-low clamping, and robust ESD immunity in miniature surface-mount packages.
FAQ
What is the polarity configuration of SMF4L8.0CA-7?
SMF4L8.0CA-7 is a bi-directional TVS diode with no cathode band marking. Its symmetrical breakdown and clamping behavior allows connection in either orientation across differential or AC-coupled signal lines without functional impact.
Does SMF4L8.0CA-7 meet AEC-Q200 requirements?
Yes - SMF4L8.0CA-7 is manufactured in IATF 16949-certified facilities and qualified to AEC-Q200 Grade 0 (–40°C to +125°C ambient, extended to +175°C junction). Full qualification data is available in Diodes' automotive product documentation portal.
How does its clamping voltage compare to competing 8V TVS devices?
At 29.4A peak current, SMF4L8.0CA-7 clamps to 13.6V maximum - matching industry-leading performance. Competing DO-214AB parts typically clamp at 14.5V or higher under identical conditions, reducing margin for 12V-rail protection.
Can SMF4L8.0CA-7 replace SMF4L8.0A in existing designs?
Yes - SMF4L8.0CA-7 is the bi-directional variant of SMF4L8.0A (uni-directional). They share identical package, VRWM, VBR, VC, and thermal specs. Replacement requires verifying system-level polarity requirements; no layout change is needed.
SMF4L8.0CA-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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 29.4A
- 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
SMF4L8.0CA-7 FAQ
1.How can I place an order for SMF4L8.0CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L8.0CA-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 SMF4L8.0CA-7 reliable?
The price and inventory of SMF4L8.0CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L8.0CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L8.0CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L8.0CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L8.0CA-7?
SMF4L8.0CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L8.0CA-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 SMF4L8.0CA-7?
For technical support, including SMF4L8.0CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L8.0CA-7 requirements.
6.How does Aetrix verify that SMF4L8.0CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L8.0CA-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 SMF4L8.0CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L8.0CA-7?
All SMF4L8.0CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L8.0CA-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 SMF4L8.0CA-7 part is unused and in its original packaging.
Return procedure for SMF4L8.0CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L8.0CA-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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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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