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Diodes Incorporated SMF4L110A-7
- Part No.:
- SMF4L110A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L110A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,512
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Product details
Overview
SMF4L110A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) designed for robust overvoltage protection in DC power lines and signal interfaces. It features a 110V working peak reverse voltage (VRWM), 122–135V breakdown range (VBR), clamping voltage of 177V at 1A surge, <0.5µA reverse leakage, and sub-1ns response time - deployed in automotive battery management and industrial I/O protection circuits.
For engineers reviewing the SMF4L110A-7 datasheet, SMF4L110A-7 pinout, SMF4L110A-7 application, or SMF4L110A-7 equivalent, key selection criteria include clamping voltage margin vs. system rail, unidirectional polarity alignment with DC bias, DO-219AA footprint compatibility, and AEC-Q200 readiness for automotive-grade deployment.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 GΩ at VRWM), but triggers avalanche conduction when transient voltage exceeds VBR, diverting surge current away from downstream ICs. Its unidirectional configuration requires correct cathode orientation relative to DC bias polarity.
The device sustains 400W peak pulse power per 10/1000µs waveform, supports 1A maximum reverse surge current (IRSM), and maintains thermal stability via low junction-to-ambient resistance (RθJA = 96°C/W) on standard FR-4 PCBs - enabling reliable operation across -55°C to +175°C ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 110V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line voltage. |
| VBR (min/max) | 122V / 135V - Breakdown occurs within this range at 1mA test current; defines minimum trigger threshold and tolerance band. |
| VC @ IRSM | 177V at 1A - Clamping voltage during surge event; must remain below downstream IC absolute maximum ratings. |
| PPK | 400W - Peak pulse power handling (10/1000µs waveform); determines survivability against ESD and lightning-induced transients. |
| IR @ VRWM | <0.5µA - Reverse leakage current at rated VRWM; ensures minimal standby power loss and signal integrity in high-impedance paths. |
| Response Time | <1.0ns - Time from 0V to VBR onset; enables suppression of fast-rising transients before sensitive circuitry is damaged. |
| Package | DO-219AA - Surface-mount, ultra-low-profile (0.6mm typical height), 2-pin molded plastic package with matte tin terminals. |
Pinout & Package
DO-219AA is a two-terminal surface-mount package with cathode-indicating band marking. The device has no internal complexity - anode and cathode are directly accessible via its single-row gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lowest potential node in unidirectional configuration; completes current path during clamping. |
| Cathode | High-side connection point | Marked by band; connects to protected line (e.g., 110V rail); conducts avalanche current toward anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-2 ESD Protection | Air ±30kV / Contact ±30kV - Meets highest industrial and automotive ESD immunity requirements without external shielding. |
| Lead-Free & Halogen-Free | RoHS 3 compliant, <900ppm Br+Cl, <1000ppm Sb - Supports green manufacturing and end-of-life compliance for global markets. |
| Automotive Qualification Pathway | Manufactured in IATF 16949 facilities; Q-suffix variants available for AEC-Q200 qualification - enables drop-in use in qualified designs. |
| Thermal Performance | RθJA = 96°C/W - Enables stable operation up to +175°C junction temperature with minimal heatsinking on standard PCB layouts. |
Applications
| Automotive Battery Line Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protects 12V/24V/48V battery-fed ECUs from load dump and jump-start transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Shunt clamping element placed between battery rail and power management IC input; responds within 1ns to suppress >100V spikes. Use Value: Prevents latch-up or permanent damage to PMICs and microcontrollers during ISO 7637-2 Pulse 5a (load dump) events. |
Use Scenario: Shields 24V digital input channels in programmable logic controllers from field-wiring induced surges and inductive kickback. IC Role / Device Role / Timing Role: Front-end transient absorber ahead of optocoupler or Schmitt-trigger input stage; clamps to 177V while limiting energy transfer. Use Value: Eliminates false triggering and extends service life of isolation components in harsh factory-floor environments. |
| Telecom Power Supply Rail Protection | Medical Equipment DC Power Entry |
|
Use Scenario: Safeguards primary-side DC rails in telecom rectifier modules exposed to AC-line transients and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between +48V output and chassis ground; absorbs 400W pulses without degradation. Use Value: Maintains uptime and avoids costly field returns by meeting ITU-T K.20/K.21 surge immunity standards. |
Use Scenario: Secures isolated DC power entry points in diagnostic imaging systems and patient monitors against ESD and accidental miswiring. IC Role / Device Role / Timing Role: Final-stage protector before DC-DC converter input; provides fail-safe clamping with <0.5µA leakage to preserve low-power sleep modes. Use Value: Ensures regulatory compliance with IEC 60601-1 3rd edition essential performance requirements for electrical safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110A | Same VRWM (110V), lower PPK (400W → 400W), but larger SMA package (DO-214AC) and higher RθJA (125°C/W). | Less suitable for ultra-dense layouts; requires larger PCB area and more thermal relief. | Select when legacy SMA footprint compatibility is required and space constraints are relaxed. |
| TPSMD110A | Same DO-219AA package, identical VRWM and VC, but rated for 600W PPK and AEC-Q200 Grade 0 (−40°C to +150°C). | Better suited for extended-temperature automotive modules where 175°C operation is not needed. | Choose for new automotive designs requiring certified qualification and higher surge margin. |
Compared with SMAJ110A, SMF4L110A-7 offers superior board density and thermal efficiency; versus TPSMD110A, it trades 200W extra surge headroom for broader temperature capability and cost-sensitive industrial use.
Availability
SMF4L110A-7 is available at Aetrix Electronics and suitable for automotive battery protection, industrial PLC input conditioning, and telecom power supply rail stabilization requiring stable component supply across multi-year production cycles.
Supply support for SMF4L110A-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 series of high-power, low-profile TVS diodes engineered specifically for space-constrained, high-reliability DC power line protection in automotive and industrial systems.
FAQ
Is SMF4L110A-7 unidirectional or bidirectional?
SMF4L110A-7 is unidirectional, indicated by the absence of "C" in its part number and confirmed by its cathode band marking. It conducts only when the cathode is at higher potential than the anode - ideal for DC-biased lines like automotive battery feeds and regulated power rails.
What is the maximum operating temperature for SMF4L110A-7?
The device is rated for junction temperatures from −55°C to +175°C. At +175°C, derating reduces peak pulse power to ~50% of the 400W rating at 25°C, per Figure 1 in DS43394 Rev. 3–2. PCB layout and copper area directly impact achievable ambient limits.
Does SMF4L110A-7 meet AEC-Q200 requirements?
SMF4L110A-7 itself is not AEC-Q200 qualified, but Diodes offers Q-suffix variants (e.g., SMF4L110AQ-7) manufactured in IATF 16949-certified facilities and tested to AEC-Q200 stress requirements - these are designated for automotive applications requiring formal qualification.
How does SMF4L110A-7 compare to SMAJ110A in PCB layout?
SMF4L110A-7 uses DO-219AA (1.90 × 2.80 mm), while SMAJ110A uses SMA (DO-214AC, 4.5 × 2.7 mm). The SMF4L variant saves >50% board area and enables tighter routing near connectors or edge-mounted inputs - critical for compact modules and dense power boards.
SMF4L110A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 2.3A
- 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
SMF4L110A-7 FAQ
1.How can I place an order for SMF4L110A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L110A-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 SMF4L110A-7 reliable?
The price and inventory of SMF4L110A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L110A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L110A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L110A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L110A-7?
SMF4L110A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L110A-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 SMF4L110A-7?
For technical support, including SMF4L110A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L110A-7 requirements.
6.How does Aetrix verify that SMF4L110A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L110A-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 SMF4L110A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L110A-7?
All SMF4L110A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L110A-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 SMF4L110A-7 part is unused and in its original packaging.
Return procedure for SMF4L110A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L110A-7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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