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Diodes Incorporated SMF4L110AQ-7
- Part No.:
- SMF4L110AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L110AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,821
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Product details
Overview
SMF4L110AQ-7 from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode in DO-219AA package, rated for 400W peak pulse power (10/1000µs), 110V working peak reverse voltage (VRWM), 122–135V breakdown voltage (VBR), and 177V maximum clamping voltage (VC) at 2.3A surge current. It delivers ±30kV IEC61000-4-2 ESD protection and is AEC-Q101 qualified for automotive battery contact and power line protection.
For engineers reviewing the SMF4L110AQ-7 datasheet, SMF4L110AQ-7 pinout, SMF4L110AQ-7 application, or SMF4L110AQ-7 equivalent, this device is selected for high-reliability DC power rail surge suppression where low clamping ratio, fast response (<1.0ns), and IATF 16949-manufactured consistency are critical in automotive and industrial systems.
Technical Context
This TVS operates as a unidirectional clamp on positive transients relative to ground, with cathode-band polarity marking. Its silicon avalanche structure enables sub-nanosecond turn-on and stable clamping across -55°C to +175°C junction temperature range.
It is optimized for single-pulse 10/1000µs waveform compliance per IEC 61000-4-5, with thermal resistance RθJA = 96°C/W on standard FR-4 PCB layout and RθJC = 18°C/W to case - enabling predictable power derating above +25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform); sustains single high-energy surges without failure in 12V–48V automotive power domains. |
| Working Peak Reverse Voltage (VRWM) | 110V; maximum continuous DC or RMS voltage the device blocks before entering avalanche conduction. |
| Breakdown Voltage (VBR) | 122–135V @ 1mA; tight tolerance ensures precise overvoltage triggering threshold for system-level fault isolation. |
| Maximum Clamping Voltage (VC) | 177V @ 2.3A; limits downstream IC voltage stress during surge events, supporting 150V-rated components. |
| ESD Withstand | ±30kV air / ±30kV contact per IEC61000-4-2; eliminates need for external ESD staging in connector-facing circuits. |
| Junction Temperature Range | -55°C to +175°C; validated for under-hood automotive environments and industrial power supply hot zones. |
| AEC-Q101 Qualified | Yes; qualified for automotive applications with PPAP capability and IATF 16949 manufacturing traceability. |
Pinout & Package
Package: DO-219AA - surface-mount, flat-lead, green molded plastic (UL 94V-0), 0.016g weight, moisture sensitivity level 1. Cathode band denotes unidirectional polarity; no band indicates bidirectional variant (not applicable to SMF4L110AQ-7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path to ground | Connected to protected line (e.g., battery+); conducts surge current to GND when VRWM exceeded. |
| Cathode | Reference node / clamping output | Connected to system ground; establishes clamping reference and defines unidirectional polarity via band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0ns turn-on (0V to VBR); prevents nanosecond-scale transients from propagating to sensitive MCU or PMIC inputs. |
| Low clamping ratio (VC/VBR) | 1.39 (177V/127V typ); minimizes overvoltage margin required for downstream component selection. |
| Lead-free & halogen-free | RoHS 3 compliant (2015/863/EU); <900ppm Br/Cl, <1000ppm Sb; meets automotive "Green" material requirements. |
| Steady-state power dissipation | 1.0W (on 1"×1" FR-4, 2 oz Cu); supports continuous leakage management in always-on battery monitoring circuits. |
| Thermal resistance (Junction-to-Case) | 18°C/W; enables accurate thermal modeling for high-density PCB layouts with adjacent heat sources. |
Applications
| Battery Management System (BMS) Input Protection | Automotive Infotainment Power Rail |
|---|---|
Use Scenario: Protects 12V/24V battery input of BMS controller against load dump and jump-start surges. IC Role / Device Role: Unidirectional TVS placed between battery+ and GND, upstream of DC-DC converter input. Use Value: Clamps 177V surges while maintaining 110V VRWM headroom, ensuring reliable operation of 150V-rated input capacitors and MOSFETs. |
Use Scenario: Shields USB-C PD and display power lines in head unit against ISO 7637-2 Pulse 5a transients. IC Role / Device Role: Line-side TVS on 12V auxiliary rail feeding USB-C controller and LVDS timing circuitry. Use Value: ±30kV ESD rating eliminates secondary ESD diodes; DO-219AA footprint saves space vs. SMA/SMB in compact infotainment modules. |
| Industrial PLC Digital Input Module | EV Onboard Charger (OBC) Control Board |
Use Scenario: Guards 24V digital input terminals against field-wiring induced surges and inductive kickback. IC Role / Device Role: Unidirectional clamp on each isolated input channel, referenced to local ground plane. Use Value: 175°C max TJ rating allows placement near relay drivers; 1.0W PD supports long-term leakage stability in dusty, high-temp enclosures. |
Use Scenario: Protects microcontroller I/O and gate driver bias rails from switching noise and AC/DC converter coupling. IC Role / Device Role: Secondary-level TVS on 3.3V/5V control logic rails, downstream of primary bulk TVS. Use Value: Tight VBR tolerance (122–135V) ensures coordinated clamping with upstream 200V TVS, preventing premature conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110A | DO-214AC package; 100W PPK; higher VC (183V @ 2.2A); slower response (~1.5ns) | Larger footprint; lower surge handling; suitable for cost-sensitive non-automotive designs | Choose for legacy board compatibility where DO-214AC is already used and 400W rating is not required. |
| TPSMD110A | DO-214AB package; 400W PPK; same VRWM/VC specs; AEC-Q101 qualified but no PPAP support | Same surge performance; lacks PPAP documentation and IATF 16949 traceability for Tier-1 automotive programs | Choose only for internal industrial designs where full automotive change control is unnecessary. |
Compared with SMAJ110A and TPSMD110A, SMF4L110AQ-7 uniquely combines AEC-Q101 qualification, PPAP capability, DO-219AA space savings, and guaranteed 400W/177V clamping - making it the sole option for new automotive ECUs requiring both miniaturization and full production compliance.
Availability
SMF4L110AQ-7 is available at Aetrix Electronics and suitable for automotive battery protection, industrial PLC input conditioning, and EV onboard charger control board designs requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMF4L110AQ-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, specializing in high-reliability protection, power management, and signal integrity solutions for automotive and industrial markets.
The SMF4L series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient suppression in automotive power distribution networks and battery-connected electronics.
FAQ
What is the polarity configuration of SMF4L110AQ-7?
SMF4L110AQ-7 is a unidirectional TVS diode with cathode-band marking. The cathode terminal connects to system ground, and the anode connects to the protected line. This configuration clamps only positive-going transients relative to ground, making it ideal for DC power rail protection where reverse voltage is not expected.
Does SMF4L110AQ-7 meet automotive qualification requirements?
Yes - SMF4L110AQ-7 is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and PPAP capable. It undergoes rigorous stress testing including HTOL, temperature cycling, and surge endurance per AEC standards, with full documentation available for Tier-1 automotive program audits.
How does the DO-219AA package compare to SMA (DO-214AC) in thermal performance?
DO-219AA offers lower thermal resistance than SMA: RθJC = 18°C/W vs. ~25°C/W for SMA, due to its exposed copper leadframe and optimized die attach. This improves steady-state power handling and reduces junction temperature rise by ~7°C at 1.0W dissipation on identical PCB layouts.
Can SMF4L110AQ-7 be used in bidirectional configurations?
No - SMF4L110AQ-7 is unidirectional only. For bidirectional protection at 110V standoff, use the pin-compatible SMF4L110CAQ-7 variant, which has identical VRWM and clamping specs but symmetrical avalanche behavior for AC or floating-rail applications.
SMF4L110AQ-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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L110AQ-7 FAQ
1.How can I place an order for SMF4L110AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L110AQ-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 SMF4L110AQ-7 reliable?
The price and inventory of SMF4L110AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L110AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L110AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L110AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L110AQ-7?
SMF4L110AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L110AQ-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 SMF4L110AQ-7?
For technical support, including SMF4L110AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L110AQ-7 requirements.
6.How does Aetrix verify that SMF4L110AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L110AQ-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 SMF4L110AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L110AQ-7?
All SMF4L110AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L110AQ-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 SMF4L110AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L110AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L110AQ-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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