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Diodes Incorporated SMF4L100CA-7
- Part No.:
- SMF4L100CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L100CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,409
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Product details
Overview
SMF4L100CA-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 DC power rails and signal lines. It features a 100V working peak reverse voltage (VRWM), 111–123V breakdown range (VBR), 162A maximum peak pulse current (IPP), 2.5µA max reverse leakage at VRWM, and clamps to ≤324V (VC) under 10/1000µs surge. Used in automotive battery interfaces and industrial power inputs.
For engineers reviewing the SMF4L100CA-7 datasheet, SMF4L100CA-7 pinout, SMF4L100CA-7 application, or SMF4L100CA-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VMAX, bidirectional symmetry for AC-coupled or floating lines, 400W peak pulse rating at 10/1000µs, and AEC-Q200 readiness via qualified automotive-grade variants.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of differential or ungrounded signal paths without polarity constraints. Its silicon avalanche structure delivers sub-nanosecond response to transients, with clamping initiated within <5ns from 0V to VBR(min).
Thermal design relies on low junction-to-case resistance (RθJC = 18°C/W) and compatibility with standard FR-4 PCB layouts using 2 oz. copper pads. The device sustains 400W peak pulse power per JEDEC-standard 10/1000µs waveform while maintaining stable leakage (<2.5µA) at 100V DC bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 100V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit DC bias. |
| VBR (min/max) | 111V / 123V - Breakdown initiates within this range at 1mA test current; defines onset of clamping action. |
| VC (max) | 324V - Maximum clamped voltage at 162A IPP (10/1000µs); determines worst-case overvoltage seen by downstream components. |
| IPP (max) | 162A - Peak surge current survivability under standardized 10/1000µs waveform; correlates to IEC 61000-4-5 Level 4 immunity. |
| IR @ VRWM | 2.5µA - Reverse leakage at rated VRWM; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| PPK | 400W - Peak pulse power dissipation capability; enables protection against high-energy transients like load dump or inductive switching. |
| Response time | <5ns - Time from 0V to VBR(min) for bi-directional operation; ensures suppression before sensitive ICs experience overstress. |
Pinout & Package
Package: DO-219AA - Surface-mount, flat-lead, bi-directional configuration with no cathode band marking; dimensions: 2.80mm × 1.90mm × 0.60mm (E × D × L), weight ≈0.016g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche terminals | No polarity designation; either terminal serves as anode or cathode depending on transient polarity - enables placement without orientation check. |
| Case / Body | Non-electrical thermal path | Molded green plastic housing with UL 94V-0 rating; provides mechanical stability and flame resistance but no electrical connection. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD protection | Air ±30kV / Contact ±30kV - Meets highest industrial ESD immunity class without external shielding or layout mitigation. |
| JEDEC-compliant surge rating | 400W @ 10/1000µs - Validated against standardized lightning/surge waveforms for reliable field deployment in harsh environments. |
| Halogen- and antimony-free | <900ppm Br, <900ppm Cl, <1000ppm Sb - Complies with global environmental directives including RoHS 3 and automotive "Green" requirements. |
| Low thermal resistance | RθJC = 18°C/W - Enables efficient heat transfer to PCB copper, supporting sustained operation under repeated surge events. |
| Moisture sensitivity level | MSL 1 (per J-STD-020) - No floor life limitation or bake requirement prior to reflow; simplifies manufacturing logistics. |
Applications
| Automotive Battery Protection | Industrial Power Input |
|---|---|
Use Scenario: Protecting CAN transceivers and microcontrollers connected directly to 12V vehicle battery rail subject to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Bidirectional clamping element placed between VBAT and GND, absorbing up to 324V transients before downstream ICs exceed absolute maximum ratings. Use Value: Eliminates need for series impedance or additional filtering; maintains system uptime during engine cranking and alternator regulation faults. |
Use Scenario: Safeguarding PLC analog input modules exposed to induced surges on 24V DC field wiring in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge shunt on power entry point, triggered within 5ns to clamp transients below 324V while limiting energy delivered to upstream regulators. Use Value: Prevents latch-up or permanent damage to precision op-amps and ADC front-ends without degrading signal bandwidth or offset stability. |
| USB-C Port ESD Protection | RS-485 Transceiver Interface |
Use Scenario: Secondary-level ESD protection on VCONN and CC lines of USB-C receptacles where space-constrained layout prohibits larger TVS arrays. IC Role / Device Role / Timing Role: Bi-directional standoff device holding 100V DC while responding to ±30kV contact ESD events faster than internal transceiver ESD structures. Use Value: Passes USB-IF compliance testing without compromising insertion force or mating cycle life due to ultra-low profile (0.6mm height) DO-219AA footprint. |
Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., MAX13487) on long cable runs susceptible to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Common-mode clamp between A/B differential pair and local ground, leveraging symmetrical breakdown to equalize transient stress across both lines. Use Value: Maintains differential signal integrity during surge events by preventing skew or saturation in receiver input stages; supports >10kV IEC 61000-4-5 immunity. |
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 |
|---|---|---|---|
| SMAJ100CA | DO-214AC package; higher RθJA (100°C/W); 300W PPK rating; VC = 324V same, but IPP = 123A lower. | Larger footprint (4.3mm × 2.6mm) limits use in ultra-dense layouts; less effective thermal dissipation in high ambient. | Select when legacy board space allows larger package and cost sensitivity outweighs thermal performance. |
| SMBJ100CA | DO-214AA package; same 400W rating; VC = 324V; IPP = 162A identical; but RθJC = 25°C/W higher than SMF4L100CA-7. | 0.8mm taller (2.4mm vs. 1.9mm); incompatible with low-profile enclosures or stacked PCB assemblies. | Choose only if existing SMB footprint reuse is mandatory and thermal derating margins permit. |
Compared with SMAJ100CA and SMBJ100CA, SMF4L100CA-7 delivers identical clamping performance in a 35% smaller footprint and 39% lower junction-to-case thermal resistance - critical for thermally constrained automotive and portable industrial designs.
Availability
SMF4L100CA-7 is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC power inputs, USB-C interface protection, and RS-485 communication systems requiring stable component supply and full traceability.
Supply support for SMF4L100CA-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 transient suppression portfolio, engineered specifically for AEC-Q200-compliant automotive subsystems and industrial equipment demanding robust surge immunity in compact surface-mount form factors.
FAQ
What is the polarity configuration of SMF4L100CA-7?
SMF4L100CA-7 is a bi-directional TVS diode with symmetrical avalanche characteristics - it has no cathode band marking and functions identically regardless of terminal orientation. This eliminates assembly errors and supports placement on AC-coupled or floating signal paths without polarity verification.
Does SMF4L100CA-7 meet AEC-Q200 requirements?
SMF4L100CA-7 itself is not AEC-Q200 qualified; however, Diodes offers automotive-grade equivalents (e.g., SMF4L100CAQ-7) with full PPAP documentation, IATF 16949 manufacturing, and qualification to AEC-Q200 Grade 1 (−40°C to +125°C). These variants share identical electrical specs and DO-219AA packaging.
How does SMF4L100CA-7 compare to unidirectional TVS diodes in power rail protection?
Unlike unidirectional TVS diodes that conduct only during negative transients (requiring series DC blocking capacitors for AC lines), SMF4L100CA-7 clamps both positive and negative excursions symmetrically. This makes it ideal for protecting bidirectional buses like RS-485 or floating sensor outputs without adding passive components or compromising signal fidelity.
What PCB layout practices maximize thermal performance for SMF4L100CA-7?
To optimize thermal dissipation, use ≥2 oz. copper on the mounting pad with thermal vias (minimum 4×0.3mm diameter) connecting to inner-layer ground planes. Maintain ≥1.5mm clearance from adjacent components and avoid solder mask over the pad. Diodes specifies a 1" × 1" FR-4 test board for RθJA characterization - replicate this copper area for production reliability.
SMF4L100CA-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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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
SMF4L100CA-7 FAQ
1.How can I place an order for SMF4L100CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L100CA-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 SMF4L100CA-7 reliable?
The price and inventory of SMF4L100CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L100CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L100CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L100CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L100CA-7?
SMF4L100CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L100CA-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 SMF4L100CA-7?
For technical support, including SMF4L100CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L100CA-7 requirements.
6.How does Aetrix verify that SMF4L100CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L100CA-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 SMF4L100CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L100CA-7?
All SMF4L100CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L100CA-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 SMF4L100CA-7 part is unused and in its original packaging.
Return procedure for SMF4L100CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L100CA-7 Tags
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